KASAN: slab-out-of-bounds Read in tcf_exts_destroy

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 569aad4f net: ag71xx: fix mdio subnode support
git tree: net
console output: https://syzkaller.appspot.com/x/log.txt?x=1591b415600000
kernel config: https://syzkaller.appspot.com/x/.config?x=6ffbfa7e4a36190f
dashboard link: https://syzkaller.appspot.com/bug?extid=35d4dea36c387813ed31
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=120c47f5600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11d58ceb600000

The bug was bisected to:

commit 6e237d099fac1f73a7b6d7287bb9191f29585a4e
Author: David Ahern <dsa...@gmail.com>
Date: Thu Dec 7 04:09:12 2017 +0000

netlink: Relax attr validation for fixed length types

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=152f5e43600000
final crash: https://syzkaller.appspot.com/x/report.txt?x=172f5e43600000
console output: https://syzkaller.appspot.com/x/log.txt?x=132f5e43600000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+35d4de...@syzkaller.appspotmail.com
Fixes: 6e237d099fac ("netlink: Relax attr validation for fixed length types")

netlink: 'syz-executor879': attribute type 2 has an invalid length.
netlink: 'syz-executor879': attribute type 2 has an invalid length.
==================================================================
BUG: KASAN: slab-out-of-bounds in tcf_exts_destroy+0xb3/0xd0 net/sched/cls_api.c:2897
Read of size 8 at addr ffff8880a1463790 by task syz-executor879/9050

CPU: 0 PID: 9050 Comm: syz-executor879 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:634
__asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
tcf_exts_destroy+0xb3/0xd0 net/sched/cls_api.c:2897
tcindex_free_perfect_hash.isra.0+0xb3/0x150 net/sched/cls_tcindex.c:273
tcindex_set_parms+0x1107/0x1e50 net/sched/cls_tcindex.c:484
tcindex_change+0x230/0x320 net/sched/cls_tcindex.c:519
tc_new_tfilter+0xa4b/0x1c70 net/sched/cls_api.c:2019
rtnetlink_rcv_msg+0x838/0xb00 net/core/rtnetlink.c:5214
netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:637 [inline]
sock_sendmsg+0xd7/0x130 net/socket.c:657
___sys_sendmsg+0x3e2/0x920 net/socket.c:2311
__sys_sendmmsg+0x1bf/0x4d0 net/socket.c:2413
__do_sys_sendmmsg net/socket.c:2442 [inline]
__se_sys_sendmmsg net/socket.c:2439 [inline]
__x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2439
do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x443299
Code: e8 9c 07 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffde8f54e48 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443299
RDX: 0000000000000332 RSI: 0000000020000140 RDI: 0000000000000008
RBP: 000000000000000c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030766461746162
R13: 00000000004041f0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 9050:
save_stack+0x23/0x90 mm/kasan/common.c:69
set_track mm/kasan/common.c:77 [inline]
__kasan_kmalloc mm/kasan/common.c:510 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:483
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524
__do_kmalloc mm/slab.c:3655 [inline]
__kmalloc+0x163/0x770 mm/slab.c:3664
kmalloc_array include/linux/slab.h:614 [inline]
kcalloc include/linux/slab.h:625 [inline]
tcindex_alloc_perfect_hash+0x5a/0x320 net/sched/cls_tcindex.c:281
tcindex_set_parms+0x454/0x1e50 net/sched/cls_tcindex.c:339
tcindex_change+0x230/0x320 net/sched/cls_tcindex.c:519
tc_new_tfilter+0xa4b/0x1c70 net/sched/cls_api.c:2019
rtnetlink_rcv_msg+0x838/0xb00 net/core/rtnetlink.c:5214
netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917
sock_sendmsg_nosec net/socket.c:637 [inline]
sock_sendmsg+0xd7/0x130 net/socket.c:657
___sys_sendmsg+0x3e2/0x920 net/socket.c:2311
__sys_sendmmsg+0x1bf/0x4d0 net/socket.c:2413
__do_sys_sendmmsg net/socket.c:2442 [inline]
__se_sys_sendmmsg net/socket.c:2439 [inline]
__x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2439
do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 2660:
save_stack+0x23/0x90 mm/kasan/common.c:69
set_track mm/kasan/common.c:77 [inline]
kasan_set_free_info mm/kasan/common.c:332 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:471
kasan_slab_free+0xe/0x10 mm/kasan/common.c:480
__cache_free mm/slab.c:3425 [inline]
kfree+0x10a/0x2c0 mm/slab.c:3756
call_usermodehelper_freeinfo kernel/umh.c:48 [inline]
umh_complete kernel/umh.c:62 [inline]
umh_complete+0x8d/0xa0 kernel/umh.c:51
call_usermodehelper_exec_async+0x46c/0x730 kernel/umh.c:122
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff8880a1463700
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 144 bytes inside of
192-byte region [ffff8880a1463700, ffff8880a14637c0)
The buggy address belongs to the page:
page:ffffea00028518c0 refcount:1 mapcount:0 mapping:ffff8880aa400000 index:0x0
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea000287e608 ffffea000286ff48 ffff8880aa400000
raw: 0000000000000000 ffff8880a1463000 0000000100000010 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff8880a1463680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff8880a1463700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880a1463780: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff8880a1463800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880a1463880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches

[Eric Dumazet]

tcindex_set_parms() seems buggy :

After

if (tcindex_alloc_perfect_hash(net, cp) < 0) // line 339

it can overwrite cp->hash :

if (tb[TCA_TCINDEX_HASH])
cp->hash = nla_get_u32(tb[TCA_TCINDEX_HASH]);

Meaning that out-of-bounds might happen later.

[Cong Wang]

Yeah, the tcindex_set_parms() code is always a nightmare.

For this case, I think we can move the TCA_TCINDEX_HASH
read before calling tcindex_alloc_perfect_hash() and adjust the
copy of the old perfect hash.

Thanks.

[syzbot]

Hello,

syzbot tried to test the proposed patch but build/boot failed:

keymaps/rc-zx-irdec.o
CC drivers/gpu/drm/i915/display/intel_quirks.o
CC drivers/gpu/drm/i915/display/intel_sprite.o
CC drivers/usb/core/devices.o
CC drivers/gpu/drm/i915/display/intel_tc.o
AR drivers/vhost/built-in.a
CC drivers/usb/core/phy.o
SHIPPED drivers/tty/vt/defkeymap.c
CC drivers/tty/vt/vt.o
CC drivers/usb/dwc3/ep0.o
CC drivers/usb/dwc3/debugfs.o
CC drivers/usb/gadget/function/f_acm.o
CC drivers/usb/dwc3/dwc3-pci.o
CONMK drivers/tty/vt/consolemap_deftbl.c
CC drivers/scsi/scsi_scan.o
CC drivers/usb/core/port.o
CC drivers/tty/vt/defkeymap.o
GEN drivers/scsi/scsi_devinfo_tbl.c
CC drivers/usb/gadget/function/u_serial.o
CC drivers/usb/chipidea/ci_hdrc_pci.o
CC drivers/usb/chipidea/ci_hdrc_zevio.o
AR drivers/net/wimax/built-in.a
AR drivers/virtio/built-in.a
CC drivers/video/fbdev/core/fbmon.o
CC drivers/xen/events/events_2l.o
CC drivers/video/fbdev/core/fbcmap.o
CC drivers/video/fbdev/core/fbsysfs.o
AR drivers/media/rc/keymaps/built-in.a
CC drivers/video/fbdev/core/modedb.o
AR drivers/media/rc/built-in.a
CC drivers/tty/vt/consolemap_deftbl.o
CC drivers/xen/xen-pciback/pciback_ops.o
CC fs/xfs/xfs_sysctl.o
AR drivers/media/built-in.a
CC drivers/xen/xen-pciback/xenbus.o
CC drivers/gpu/drm/i915/display/intel_vga.o
CC drivers/xen/xenbus/xenbus_client.o
CC drivers/xen/xenbus/xenbus_xs.o
CC drivers/xen/xenbus/xenbus_comms.o
CC drivers/usb/gadget/legacy/multi.o
CC drivers/usb/host/pci-quirks.o
CC fs/xfs/xfs_ioctl32.o
AR drivers/pci/built-in.a
AR drivers/net/wireless/admtek/built-in.a
CC drivers/usb/core/hcd-pci.o
CC drivers/usb/core/usb-acpi.o
CC drivers/xen/xen-pciback/conf_space.o
CC drivers/xen/xen-pciback/conf_space_header.o
CC drivers/net/wan/hdlc_ppp.o
AR drivers/net/wireless/ath/built-in.a
CC drivers/scsi/scsi_devinfo.o
CC drivers/scsi/scsi_netlink.o
CC drivers/net/wireless/rndis_wlan.o
CC drivers/net/wireless/mac80211_hwsim.o
CC drivers/usb/gadget/function/u_ether.o
CC drivers/video/fbdev/core/fbcvt.o
CC drivers/usb/gadget/function/f_rndis.o
CC drivers/video/fbdev/core/fb_defio.o
CC drivers/video/fbdev/core/fbcon.o
CC drivers/usb/gadget/function/rndis.o
AR drivers/usb/early/built-in.a
CC drivers/video/fbdev/core/bitblit.o
CC drivers/video/fbdev/core/softcursor.o
AR drivers/usb/chipidea/built-in.a
CC drivers/usb/host/ehci-hcd.o
CC drivers/usb/gadget/function/f_mass_storage.o
CC drivers/net/xen-netback/netback.o
CC drivers/net/xen-netback/xenbus.o
CC drivers/net/xen-netback/interface.o
CC drivers/usb/host/ehci-pci.o
CC drivers/usb/host/ohci-hcd.o
CC drivers/xen/events/events_fifo.o
CC drivers/gpu/drm/i915/display/intel_acpi.o
CC drivers/usb/gadget/function/storage_common.o
CC drivers/usb/gadget/function/f_fs.o
CC drivers/scsi/scsi_sysctl.o
CC drivers/xen/xen-pciback/conf_space_capability.o
CC drivers/xen/xen-pciback/conf_space_quirks.o
CC drivers/scsi/scsi_proc.o
CC drivers/xen/xen-pciback/vpci.o
CC drivers/xen/xen-pciback/passthrough.o
CC drivers/net/usb/net1080.o
AR drivers/usb/gadget/legacy/built-in.a
CC drivers/video/fbdev/core/tileblit.o
CC drivers/usb/host/ohci-pci.o
CC drivers/usb/host/xhci.o
CC drivers/usb/gadget/udc/core.o
CC drivers/usb/host/uhci-hcd.o
CC drivers/gpu/drm/i915/display/intel_opregion.o
CC drivers/net/wan/hdlc_x25.o
CC drivers/scsi/scsi_debugfs.o
CC drivers/xen/xenbus/xenbus_probe.o
CC drivers/net/usb/rndis_host.o
CC drivers/net/usb/cdc_subset.o
CC drivers/xen/xenfs/super.o
CC drivers/scsi/scsi_trace.o
CC drivers/scsi/scsi_logging.o
CC drivers/scsi/scsi_pm.o
CC drivers/video/fbdev/core/cfbfillrect.o
CC drivers/net/wan/x25_asy.o
CC drivers/scsi/scsi_common.o
CC drivers/usb/dwc3/dwc3-haps.o
CC drivers/scsi/raid_class.o
CC drivers/scsi/scsi_transport_spi.o
CC drivers/video/fbdev/core/cfbcopyarea.o
CC drivers/video/fbdev/core/cfbimgblt.o
CC drivers/gpu/drm/i915/display/intel_fbdev.o
CC fs/xfs/xfs_pnfs.o
AR drivers/xen/events/built-in.a
CC drivers/usb/gadget/function/f_midi.o
CC drivers/xen/xenfs/xenstored.o
CC drivers/tty/n_tty.o
CC drivers/scsi/scsi_transport_fc.o
CC drivers/scsi/scsi_transport_iscsi.o
AR drivers/usb/core/built-in.a
CC drivers/scsi/scsi_transport_sas.o
CC drivers/usb/gadget/udc/trace.o
CC drivers/scsi/scsi_transport_srp.o
CC drivers/gpu/drm/i915/display/dvo_ch7017.o
CC drivers/gpu/drm/i915/display/dvo_ch7xxx.o
CC drivers/video/fbdev/core/sysfillrect.o
CC drivers/usb/host/xhci-mem.o
AR drivers/xen/xen-pciback/built-in.a
CC drivers/net/xen-netback/hash.o
CC drivers/net/wireless/virt_wifi.o
CC drivers/net/xen-netback/rx.o
CC drivers/xen/cpu_hotplug.o
CC drivers/xen/grant-table.o
CC drivers/usb/host/xhci-ext-caps.o
CC drivers/scsi/libiscsi.o
CC drivers/scsi/hpsa.o
CC drivers/net/wan/dlci.o
CC drivers/net/wan/lapbether.o
CC drivers/gpu/drm/drm_plane.o
CC drivers/xen/xenfs/xensyms.o
CC drivers/video/fbdev/vesafb.o
CC drivers/video/fbdev/core/syscopyarea.o
CC drivers/video/fbdev/core/sysimgblt.o
CC drivers/xen/xenbus/xenbus_probe_backend.o
CC drivers/video/fbdev/core/fb_sys_fops.o
CC drivers/video/fbdev/efifb.o
CC drivers/xen/xenbus/xenbus_dev_frontend.o
CC drivers/xen/xenbus/xenbus_dev_backend.o
CC drivers/scsi/virtio_scsi.o
CC drivers/net/usb/zaurus.o
CC drivers/video/fbdev/simplefb.o
CC drivers/xen/xenbus/xenbus_probe_frontend.o
CC drivers/net/usb/mcs7830.o
CC drivers/usb/gadget/udc/dummy_hcd.o
CC drivers/xen/features.o
CC drivers/net/usb/usbnet.o
CC drivers/xen/balloon.o
CC drivers/usb/gadget/usbstring.o
CC drivers/usb/host/xhci-ring.o
CC drivers/usb/misc/ezusb.o
CC drivers/usb/host/xhci-hub.o
CC drivers/gpu/drm/i915/display/dvo_ivch.o
CC drivers/gpu/drm/i915/display/dvo_ns2501.o
CC drivers/gpu/drm/i915/display/dvo_sil164.o
CC drivers/scsi/st.o
CC drivers/scsi/sd.o
CC drivers/usb/host/xhci-dbg.o
CC drivers/xen/manage.o
CC drivers/xen/preempt.o
AR drivers/xen/xenfs/built-in.a
CC drivers/xen/time.o
CC drivers/video/fbdev/vfb.o
CC drivers/scsi/sd_dif.o
CC drivers/scsi/sd_zbc.o
CC drivers/net/usb/cdc_ncm.o
CC drivers/usb/host/xhci-trace.o
CC drivers/scsi/sr.o
CC drivers/xen/mem-reservation.o
CC drivers/scsi/sr_ioctl.o
CC drivers/scsi/sr_vendor.o
AR fs/xfs/built-in.a
CC drivers/scsi/sg.o
AR fs/built-in.a
CC drivers/usb/gadget/config.o
CC drivers/xen/pci.o
CC drivers/xen/dbgp.o
CC drivers/net/usb/cdc_mbim.o
CC drivers/net/dummy.o
CC drivers/net/eql.o
CC drivers/net/ifb.o
CC drivers/net/macsec.o
AR drivers/net/xen-netback/built-in.a
CC drivers/xen/acpi.o
AR drivers/net/wan/built-in.a
CC drivers/usb/host/xhci-debugfs.o
CC drivers/usb/host/xhci-plat.o
CC drivers/usb/host/xhci-pci.o
CC drivers/xen/xen-acpi-pad.o
CC drivers/xen/pcpu.o
CC drivers/xen/biomerge.o
CC drivers/gpu/drm/drm_color_mgmt.o
CC drivers/gpu/drm/drm_print.o
AR drivers/usb/misc/built-in.a
CC drivers/xen/xen-balloon.o
CC drivers/gpu/drm/i915/display/dvo_tfp410.o
AR drivers/xen/xenbus/built-in.a
CC drivers/gpu/drm/drm_dumb_buffers.o
CC drivers/gpu/drm/drm_mode_config.o
CC drivers/net/macvlan.o
CC drivers/usb/gadget/epautoconf.o
CC drivers/net/macvtap.o
CC drivers/net/mii.o
CC drivers/usb/gadget/composite.o
CC drivers/xen/evtchn.o
CC drivers/net/Space.o
CC drivers/usb/gadget/functions.o
CC drivers/usb/mon/mon_main.o
AR drivers/usb/gadget/function/built-in.a
CC drivers/usb/gadget/configfs.o
CC drivers/scsi/scsi_sysfs.o
CC drivers/usb/gadget/u_f.o
CC drivers/usb/phy/phy.o
CC drivers/usb/phy/phy-generic.o
CC drivers/usb/roles/class.o
CC drivers/tty/tty_ioctl.o
CC drivers/xen/gntdev.o
CC drivers/net/loopback.o
CC drivers/usb/serial/usb-serial.o
CC drivers/tty/tty_ldisc.o
AR drivers/tty/vt/built-in.a
CC drivers/gpu/drm/i915/display/icl_dsi.o
CC drivers/gpu/drm/drm_vblank.o
CC drivers/tty/tty_buffer.o
CC drivers/tty/tty_port.o
CC drivers/usb/serial/generic.o
CC drivers/gpu/drm/drm_syncobj.o
CC drivers/usb/serial/bus.o
CC drivers/usb/serial/ch341.o
AR drivers/usb/dwc3/built-in.a
CC drivers/gpu/drm/i915/display/intel_crt.o
CC drivers/usb/storage/uas.o
CC drivers/usb/storage/scsiglue.o
CC drivers/usb/storage/protocol.o
CC drivers/xen/gntalloc.o
CC drivers/xen/sys-hypervisor.o
CC drivers/xen/platform-pci.o
AR drivers/net/wireless/built-in.a
CC drivers/xen/swiotlb-xen.o
CC drivers/usb/serial/ftdi_sio.o
CC drivers/usb/serial/cp210x.o
AR drivers/video/fbdev/core/built-in.a
CC drivers/usb/serial/keyspan.o
CC drivers/gpu/drm/drm_writeback.o
CC drivers/gpu/drm/drm_lease.o
AR drivers/video/fbdev/built-in.a
CC drivers/tty/tty_mutex.o
CC drivers/xen/mcelog.o
AR drivers/video/built-in.a
CC drivers/usb/mon/mon_stat.o
CC drivers/gpu/drm/i915/display/intel_ddi.o
CC drivers/usb/serial/option.o
CC drivers/tty/tty_ldsem.o
CC drivers/usb/serial/oti6858.o
CC drivers/usb/mon/mon_text.o
CC drivers/usb/mon/mon_bin.o
CC drivers/gpu/drm/drm_client.o
CC drivers/usb/serial/pl2303.o
CC drivers/usb/serial/qcserial.o
AR drivers/usb/gadget/udc/built-in.a
CC drivers/net/netconsole.o
CC drivers/usb/serial/sierra.o
AR drivers/usb/roles/built-in.a
CC drivers/tty/tty_baudrate.o
CC drivers/tty/tty_jobctrl.o
CC drivers/tty/n_null.o
CC drivers/tty/pty.o
AR drivers/usb/phy/built-in.a
CC drivers/usb/storage/transport.o
CC drivers/usb/storage/usb.o
CC drivers/usb/storage/initializers.o
CC drivers/xen/privcmd.o
CC drivers/tty/tty_audit.o
CC drivers/tty/sysrq.o
CC drivers/net/tun.o
CC drivers/usb/usbip/usbip_common.o
AR drivers/usb/typec/mux/built-in.a
CC drivers/usb/serial/usb-serial-simple.o
AR drivers/usb/typec/altmodes/built-in.a
CC drivers/usb/storage/sierra_ms.o
CC drivers/usb/serial/usb_wwan.o
CC drivers/gpu/drm/drm_client_modeset.o
CC drivers/usb/usbip/usbip_event.o
CC drivers/usb/typec/tcpm/tcpm.o
CC drivers/tty/n_hdlc.o
CC drivers/usb/typec/ucsi/ucsi.o
CC drivers/tty/ttynull.o
CC drivers/xen/privcmd-buf.o
CC drivers/gpu/drm/drm_atomic_uapi.o
CC drivers/xen/xen-acpi-processor.o
CC drivers/xen/efi.o
AR drivers/net/usb/built-in.a
CC drivers/gpu/drm/drm_ioc32.o
CC drivers/xen/xlate_mmu.o
CC drivers/gpu/drm/drm_hdcp.o
CC drivers/net/tap.o
CC drivers/xen/pvcalls-back.o
CC drivers/gpu/drm/drm_gem_shmem_helper.o
CC drivers/gpu/drm/drm_panel.o
CC drivers/usb/storage/option_ms.o
CC drivers/usb/typec/ucsi/trace.o
CC drivers/gpu/drm/drm_agpsupport.o
CC drivers/xen/pvcalls-front.o
CC drivers/net/veth.o
CC drivers/net/virtio_net.o
CC drivers/gpu/drm/drm_pci.o
CC drivers/gpu/drm/drm_debugfs.o
CC drivers/gpu/drm/drm_debugfs_crc.o
CC drivers/gpu/drm/drm_mipi_dsi.o
CC drivers/gpu/drm/drm_panel_orientation_quirks.o
CC drivers/usb/typec/ucsi/ucsi_acpi.o
CC drivers/net/vxlan.o
CC drivers/net/geneve.o
CC drivers/net/gtp.o
CC drivers/gpu/drm/i915/display/intel_dp.o
CC drivers/net/nlmon.o
CC drivers/xen/xen-front-pgdir-shbuf.o
CC drivers/usb/storage/usual-tables.o
CC drivers/usb/usbip/vhci_sysfs.o
CC drivers/usb/typec/class.o
CC drivers/usb/storage/realtek_cr.o
AR drivers/usb/mon/built-in.a
CC drivers/gpu/drm/i915/display/intel_dp_aux_backlight.o
CC drivers/usb/typec/mux.o
CC drivers/gpu/drm/i915/display/intel_dp_link_training.o
CC drivers/usb/typec/bus.o
CC drivers/gpu/drm/i915/display/intel_dp_mst.o
CC drivers/gpu/drm/i915/display/intel_dsi.o
CC drivers/net/vrf.o
CC drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.o
CC drivers/gpu/drm/i915/display/intel_dsi_vbt.o
CC drivers/gpu/drm/i915/display/intel_dvo.o
CC drivers/net/vsockmon.o
CC drivers/net/xen-netfront.o
CC drivers/net/net_failover.o
CC drivers/usb/usbip/vhci_tx.o
CC drivers/gpu/drm/i915/display/intel_gmbus.o
CC drivers/gpu/drm/i915/display/intel_hdmi.o
CC drivers/usb/usbip/vhci_rx.o
CC drivers/gpu/drm/i915/display/intel_lspcon.o
CC drivers/usb/usbip/vhci_hcd.o
CC drivers/usb/usbip/stub_dev.o
AR drivers/tty/built-in.a
CC drivers/usb/usbip/stub_main.o
CC drivers/usb/usbip/stub_rx.o
CC drivers/usb/usbip/stub_tx.o
CC drivers/usb/usbip/vudc_dev.o
CC drivers/usb/usbip/vudc_sysfs.o
CC drivers/gpu/drm/i915/display/intel_lvds.o
CC drivers/gpu/drm/i915/display/intel_panel.o
AR drivers/usb/serial/built-in.a
CC drivers/gpu/drm/i915/display/intel_sdvo.o
CC drivers/usb/usbip/vudc_transfer.o
CC drivers/usb/usbip/vudc_rx.o
CC drivers/usb/usbip/vudc_tx.o
AR drivers/usb/typec/ucsi/built-in.a
CC drivers/gpu/drm/i915/display/intel_tv.o
CC drivers/usb/usbip/vudc_main.o
AR drivers/usb/gadget/built-in.a
CC drivers/gpu/drm/i915/display/intel_vdsc.o
CC drivers/gpu/drm/i915/display/vlv_dsi.o
CC drivers/gpu/drm/i915/display/vlv_dsi_pll.o
CC drivers/gpu/drm/i915/oa/i915_oa_hsw.o
CC drivers/gpu/drm/i915/oa/i915_oa_bdw.o
CC drivers/gpu/drm/i915/oa/i915_oa_chv.o
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt2.o
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt3.o
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt4.o
AR drivers/usb/storage/built-in.a
CC drivers/gpu/drm/i915/oa/i915_oa_bxt.o
CC drivers/gpu/drm/i915/oa/i915_oa_kblgt2.o
CC drivers/gpu/drm/i915/oa/i915_oa_kblgt3.o
CC drivers/gpu/drm/i915/oa/i915_oa_glk.o
CC drivers/gpu/drm/i915/oa/i915_oa_cflgt2.o
CC drivers/gpu/drm/i915/oa/i915_oa_cflgt3.o
CC drivers/gpu/drm/i915/oa/i915_oa_cnl.o
CC drivers/gpu/drm/i915/oa/i915_oa_icl.o
CC drivers/gpu/drm/i915/oa/i915_oa_tgl.o
CC drivers/gpu/drm/i915/i915_perf.o
CC drivers/gpu/drm/i915/i915_gpu_error.o
CC drivers/gpu/drm/i915/i915_vgpu.o
AR drivers/usb/host/built-in.a
AR drivers/xen/built-in.a
AR drivers/usb/usbip/built-in.a
AR drivers/usb/typec/tcpm/built-in.a
AR drivers/usb/typec/built-in.a
AR drivers/usb/built-in.a
AR drivers/scsi/built-in.a
AR drivers/net/built-in.a
AR drivers/gpu/drm/i915/built-in.a
AR drivers/gpu/drm/built-in.a
AR drivers/gpu/built-in.a
AR drivers/built-in.a
GEN .version
CHK include/generated/compile.h
LD vmlinux.o
MODPOST vmlinux.o
MODINFO modules.builtin.modinfo
BTF: .tmp_vmlinux.btf: pahole version v1.9 is too old, need at least v1.13
Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
Makefile:1078: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 1


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=15a185bee00000


Tested on:

commit: 3aa7c367 net_sched: fix an OOB access in cls_tcindex
git tree: https://github.com/congwang/linux.git syzbot

[syzbot]

Hello,

syzbot tried to test the proposed patch but build/boot failed:

s/video/fbdev/omap2/omapfb/dss/built-in.a
CC drivers/video/hdmi.o
CC drivers/media/rc/keymaps/rc-purpletv.o
AR drivers/video/fbdev/omap2/omapfb/built-in.a
AR drivers/usb/class/built-in.a
AR drivers/video/fbdev/omap2/built-in.a
CC drivers/usb/dwc3/trace.o
CC drivers/usb/dwc3/core.o
CC drivers/usb/core/usb.o
SHIPPED drivers/tty/vt/defkeymap.c
CC drivers/usb/dwc3/gadget.o
CC net/netfilter/xt_osf.o
HOSTCC drivers/video/logo/pnmtologo
CC drivers/virtio/virtio_balloon.o
CC drivers/scsi/sd.o
AR drivers/video/backlight/built-in.a
CC drivers/media/rc/keymaps/rc-pv951.o
CONMK drivers/tty/vt/consolemap_deftbl.c
CC net/netfilter/xt_cgroup.o
CC drivers/tty/vt/defkeymap.o
CC net/netfilter/xt_owner.o
CC drivers/video/fbdev/core/fb_notify.o
AR net/sched/built-in.a
CC drivers/gpu/drm/i915/display/dvo_ch7017.o
CC drivers/gpu/drm/i915/display/dvo_ch7xxx.o
CC drivers/tty/vt/consolemap_deftbl.o
CC drivers/xen/events/events_fifo.o
CC drivers/video/fbdev/core/fbmem.o
CC drivers/virtio/virtio_input.o
CC drivers/usb/core/hub.o
CC drivers/gpu/drm/i915/display/dvo_ivch.o
CC drivers/usb/core/hcd.o
CC drivers/media/rc/keymaps/rc-hauppauge.o
CC drivers/media/rc/keymaps/rc-rc6-mce.o
LOGO drivers/video/logo/logo_linux_clut224.c
CC drivers/video/logo/logo_linux_clut224.o
CC drivers/video/fbdev/core/fbmon.o
CC drivers/scsi/sd_dif.o
CC drivers/usb/core/urb.o
CC drivers/gpu/drm/i915/display/dvo_ns2501.o
CC drivers/video/fbdev/core/fbcmap.o
CC drivers/media/rc/keymaps/rc-real-audio-220-32-keys.o
CC drivers/gpu/drm/i915/display/dvo_sil164.o
AR drivers/vfio/built-in.a
AR drivers/watchdog/built-in.a
AR drivers/video/logo/built-in.a
CC drivers/video/fbdev/core/fbsysfs.o
CC drivers/gpu/drm/i915/display/dvo_tfp410.o
CC net/netfilter/xt_pkttype.o
CC net/netfilter/xt_physdev.o
CC drivers/gpu/drm/i915/display/intel_crt.o
CC drivers/gpu/drm/i915/display/icl_dsi.o
CC drivers/xen/xen-pciback/pci_stub.o
CC net/netfilter/xt_policy.o
CC drivers/xen/xen-pciback/pciback_ops.o
CC drivers/xen/xen-pciback/xenbus.o
CC drivers/xen/xen-pciback/conf_space.o
CC drivers/net/net_failover.o
CC drivers/tty/tty_ldisc.o
CC drivers/usb/core/message.o
CC drivers/tty/tty_buffer.o
CC drivers/media/rc/keymaps/rc-reddo.o
CC drivers/media/rc/keymaps/rc-snapstream-firefly.o
CC drivers/media/rc/keymaps/rc-streamzap.o
CC drivers/video/fbdev/efifb.o
CC drivers/video/fbdev/vesafb.o
CC drivers/scsi/sd_zbc.o
CC drivers/scsi/sr.o
CC drivers/video/fbdev/core/modedb.o
AR drivers/video/console/built-in.a
CC net/netfilter/xt_quota.o
CC net/netfilter/xt_rateest.o
CC net/netfilter/xt_realm.o
CC drivers/xen/xen-pciback/conf_space_header.o
CC drivers/video/fbdev/core/fbcvt.o
CC drivers/video/fbdev/core/fb_defio.o
CC drivers/usb/core/driver.o
CC drivers/xen/xen-pciback/conf_space_capability.o
CC drivers/usb/core/config.o
CC drivers/video/fbdev/simplefb.o
CC drivers/gpu/drm/i915/display/intel_ddi.o
AR drivers/tty/serial/built-in.a
CC drivers/usb/dwc3/dwc3-pci.o
CC drivers/usb/dwc3/debugfs.o
CC drivers/usb/dwc3/ep0.o
CC net/netfilter/xt_recent.o
CC drivers/video/fbdev/core/fbcon.o
CC drivers/xen/xenbus/xenbus_client.o
CC drivers/media/rc/keymaps/rc-tango.o
CC drivers/usb/dwc3/dwc3-haps.o
AR drivers/virtio/built-in.a
CC net/netfilter/xt_sctp.o
CC drivers/video/fbdev/vfb.o
CC drivers/gpu/drm/i915/display/intel_dp.o
CC drivers/xen/xen-pciback/conf_space_quirks.o
CC net/netfilter/xt_socket.o
CC drivers/xen/xenbus/xenbus_comms.o
CC drivers/video/fbdev/core/bitblit.o
CC drivers/media/rc/keymaps/rc-tanix-tx5max.o
CC drivers/usb/early/ehci-dbgp.o
CC drivers/media/rc/keymaps/rc-technisat-ts35.o
CC drivers/media/rc/keymaps/rc-tanix-tx3mini.o
CC drivers/media/rc/keymaps/rc-tbs-nec.o
AR drivers/xen/events/built-in.a
CC drivers/media/rc/keymaps/rc-technisat-usb2.o
CC drivers/video/fbdev/core/softcursor.o
AR drivers/vhost/built-in.a
CC drivers/video/fbdev/core/tileblit.o
CC drivers/media/rc/keymaps/rc-terratec-cinergy-c-pci.o
CC drivers/xen/xen-pciback/vpci.o
CC drivers/xen/xenbus/xenbus_xs.o
CC drivers/gpu/drm/i915/display/intel_dp_aux_backlight.o
CC drivers/media/rc/keymaps/rc-terratec-cinergy-s2-hd.o
CC drivers/xen/xen-pciback/passthrough.o
CC drivers/xen/xenbus/xenbus_probe.o
CC drivers/media/rc/keymaps/rc-terratec-slim.o
CC drivers/media/rc/keymaps/rc-terratec-cinergy-xs.o
CC drivers/xen/xenfs/super.o
CC drivers/xen/xenfs/xenstored.o
CC drivers/scsi/sr_ioctl.o
CC drivers/scsi/sr_vendor.o
CC drivers/scsi/sg.o
CC drivers/video/fbdev/core/cfbfillrect.o
CC drivers/xen/xenbus/xenbus_probe_backend.o
CC drivers/media/rc/keymaps/rc-terratec-slim-2.o
CC drivers/media/rc/keymaps/rc-tevii-nec.o
CC drivers/xen/xenbus/xenbus_dev_frontend.o
CC drivers/video/fbdev/core/cfbcopyarea.o
CC drivers/usb/core/file.o
CC drivers/video/fbdev/core/cfbimgblt.o
CC drivers/gpu/drm/i915/display/intel_dp_link_training.o
CC drivers/gpu/drm/i915/display/intel_dp_mst.o
CC drivers/tty/tty_port.o
CC drivers/xen/xenfs/xensyms.o
CC drivers/media/rc/keymaps/rc-tivo.o
CC drivers/usb/gadget/function/f_acm.o
CC drivers/scsi/scsi_sysfs.o
CC drivers/video/fbdev/core/sysfillrect.o
CC net/netfilter/xt_state.o
CC drivers/tty/tty_mutex.o
CC drivers/tty/tty_ldsem.o
CC drivers/tty/tty_baudrate.o
CC drivers/tty/tty_jobctrl.o
CC drivers/xen/xenbus/xenbus_dev_backend.o
CC drivers/usb/core/buffer.o
CC net/netfilter/xt_string.o
CC drivers/tty/n_null.o
CC drivers/tty/pty.o
CC drivers/xen/grant-table.o
CC net/netfilter/xt_statistic.o
CC drivers/xen/cpu_hotplug.o
AR drivers/xen/xen-pciback/built-in.a
CC net/netfilter/xt_tcpmss.o
CC drivers/media/rc/keymaps/rc-total-media-in-hand.o
CC drivers/tty/tty_audit.o
AR drivers/usb/early/built-in.a
CC drivers/media/rc/keymaps/rc-total-media-in-hand-02.o
CC drivers/video/fbdev/core/syscopyarea.o
CC drivers/video/fbdev/core/sysimgblt.o
CC drivers/gpu/drm/i915/display/intel_dsi.o
CC net/netfilter/xt_time.o
CC drivers/usb/gadget/function/u_serial.o
CC drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.o
CC drivers/gpu/drm/i915/display/intel_dsi_vbt.o
AR drivers/net/built-in.a
CC drivers/gpu/drm/i915/display/intel_dvo.o
CC drivers/gpu/drm/i915/display/intel_gmbus.o
AR drivers/xen/xenfs/built-in.a
CC drivers/media/rc/keymaps/rc-trekstor.o
CC drivers/usb/gadget/legacy/multi.o
CC drivers/media/rc/keymaps/rc-tt-1500.o
CC drivers/usb/gadget/function/u_ether.o
CC drivers/gpu/drm/i915/display/intel_hdmi.o
CC drivers/usb/gadget/udc/core.o
CC drivers/usb/gadget/udc/trace.o
CC drivers/usb/gadget/udc/dummy_hcd.o
CC drivers/tty/sysrq.o
CC drivers/usb/gadget/usbstring.o
CC drivers/usb/gadget/config.o
CC drivers/video/fbdev/core/fb_sys_fops.o
CC drivers/usb/gadget/function/f_rndis.o
CC drivers/usb/core/sysfs.o
CC drivers/usb/host/pci-quirks.o
CC drivers/xen/xenbus/xenbus_probe_frontend.o
CC drivers/usb/gadget/function/rndis.o
CC drivers/usb/host/ehci-hcd.o
CC drivers/tty/n_hdlc.o
CC drivers/gpu/drm/i915/display/intel_lspcon.o
CC drivers/usb/gadget/epautoconf.o
CC drivers/usb/core/endpoint.o
CC drivers/usb/gadget/composite.o
CC drivers/usb/misc/ezusb.o
CC drivers/usb/gadget/function/f_mass_storage.o
CC drivers/media/rc/keymaps/rc-twinhan-dtv-cab-ci.o
CC drivers/tty/ttynull.o
CC drivers/usb/gadget/function/storage_common.o
CC drivers/gpu/drm/i915/display/intel_lvds.o
CC drivers/media/rc/keymaps/rc-vega-s9x.o
CC drivers/media/rc/keymaps/rc-twinhan1027.o
CC drivers/media/rc/keymaps/rc-videomate-m1f.o
CC drivers/usb/mon/mon_main.o
CC drivers/media/rc/keymaps/rc-videomate-s350.o
CC drivers/usb/gadget/function/f_fs.o
CC drivers/usb/gadget/function/f_midi.o
CC net/netfilter/xt_u32.o
CC drivers/media/rc/keymaps/rc-videomate-tv-pvr.o
CC drivers/usb/host/ehci-pci.o
CC drivers/gpu/drm/i915/display/intel_panel.o
CC drivers/gpu/drm/i915/display/intel_sdvo.o
CC drivers/usb/mon/mon_stat.o
CC drivers/usb/phy/phy.o
CC drivers/usb/phy/phy-generic.o
CC drivers/usb/gadget/functions.o
AR drivers/usb/gadget/legacy/built-in.a
CC drivers/gpu/drm/i915/display/intel_tv.o
CC drivers/gpu/drm/i915/display/intel_vdsc.o
CC drivers/usb/gadget/configfs.o
CC drivers/usb/core/devio.o
CC drivers/usb/core/notify.o
AR drivers/tty/vt/built-in.a
CC drivers/usb/core/generic.o
CC drivers/usb/core/phy.o
CC drivers/usb/core/quirks.o
CC drivers/usb/host/ohci-hcd.o
CC drivers/usb/core/devices.o
CC drivers/gpu/drm/i915/display/vlv_dsi.o
CC drivers/usb/host/ohci-pci.o
CC drivers/usb/core/port.o
CC drivers/usb/roles/class.o
CC drivers/usb/host/uhci-hcd.o
CC drivers/media/rc/keymaps/rc-wetek-hub.o
CC drivers/usb/host/xhci.o
CC drivers/xen/features.o
CC drivers/usb/core/hcd-pci.o
AR drivers/usb/misc/built-in.a
CC drivers/xen/balloon.o
CC drivers/usb/host/xhci-mem.o
CC drivers/usb/core/usb-acpi.o
CC drivers/gpu/drm/i915/display/vlv_dsi_pll.o
CC drivers/usb/gadget/u_f.o
CC drivers/usb/mon/mon_text.o
CC drivers/gpu/drm/i915/oa/i915_oa_hsw.o
CC drivers/usb/mon/mon_bin.o
AR net/netfilter/built-in.a
CC drivers/media/rc/keymaps/rc-wetek-play2.o
CC drivers/usb/host/xhci-ext-caps.o
CC drivers/gpu/drm/i915/oa/i915_oa_bdw.o
AR drivers/xen/xenbus/built-in.a
AR drivers/usb/dwc3/built-in.a
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt2.o
CC drivers/media/rc/keymaps/rc-winfast.o
CC drivers/gpu/drm/i915/oa/i915_oa_chv.o
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt3.o
CC drivers/media/rc/keymaps/rc-winfast-usbii-deluxe.o
AR drivers/tty/built-in.a
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt4.o
CC drivers/media/rc/keymaps/rc-su3000.o
CC drivers/usb/host/xhci-ring.o
CC drivers/media/rc/keymaps/rc-xbox-dvd.o
CC drivers/media/rc/keymaps/rc-x96max.o
CC drivers/usb/host/xhci-hub.o
CC drivers/xen/manage.o
CC drivers/xen/preempt.o
CC drivers/media/rc/keymaps/rc-zx-irdec.o
CC drivers/usb/host/xhci-dbg.o
CC drivers/gpu/drm/i915/oa/i915_oa_kblgt2.o
CC drivers/gpu/drm/i915/oa/i915_oa_bxt.o
CC drivers/gpu/drm/i915/oa/i915_oa_kblgt3.o
CC drivers/xen/time.o
CC drivers/gpu/drm/i915/oa/i915_oa_glk.o
AR drivers/usb/phy/built-in.a
CC drivers/usb/serial/usb-serial.o
CC drivers/usb/serial/generic.o
CC drivers/gpu/drm/i915/oa/i915_oa_cflgt3.o
CC drivers/gpu/drm/i915/oa/i915_oa_cflgt2.o
CC drivers/usb/serial/bus.o
CC drivers/usb/host/xhci-trace.o
CC drivers/usb/storage/uas.o
AR drivers/usb/typec/altmodes/built-in.a
AR drivers/usb/roles/built-in.a
CC drivers/usb/host/xhci-debugfs.o
AR drivers/usb/typec/mux/built-in.a
CC drivers/gpu/drm/i915/oa/i915_oa_cnl.o
CC drivers/usb/usbip/usbip_common.o
CC drivers/usb/typec/ucsi/ucsi.o
CC drivers/usb/typec/tcpm/tcpm.o
CC drivers/usb/storage/protocol.o
CC drivers/usb/storage/scsiglue.o
CC drivers/usb/storage/transport.o
AR drivers/video/fbdev/core/built-in.a
CC drivers/usb/storage/usb.o
AR drivers/video/fbdev/built-in.a
CC drivers/usb/storage/initializers.o
AR drivers/media/rc/keymaps/built-in.a
AR drivers/video/built-in.a
CC drivers/usb/storage/sierra_ms.o
CC drivers/xen/mem-reservation.o
CC drivers/usb/typec/ucsi/trace.o
AR drivers/media/rc/built-in.a
CC drivers/usb/storage/option_ms.o
CC drivers/usb/typec/class.o
AR drivers/media/built-in.a
AR drivers/usb/gadget/udc/built-in.a
CC drivers/usb/storage/usual-tables.o
CC drivers/usb/storage/realtek_cr.o
CC drivers/xen/pci.o
CC drivers/usb/usbip/usbip_event.o
CC drivers/usb/usbip/vhci_sysfs.o
CC drivers/xen/dbgp.o
CC drivers/usb/host/xhci-pci.o
CC drivers/usb/serial/ch341.o
CC drivers/usb/host/xhci-plat.o
CC drivers/usb/serial/cp210x.o
CC drivers/usb/typec/mux.o
CC drivers/usb/serial/ftdi_sio.o
CC drivers/usb/serial/keyspan.o
AR drivers/usb/mon/built-in.a
CC drivers/xen/acpi.o
CC drivers/xen/xen-acpi-pad.o
CC drivers/usb/serial/option.o
CC drivers/xen/pcpu.o
CC drivers/usb/usbip/vhci_tx.o
CC drivers/usb/usbip/vhci_rx.o
CC drivers/gpu/drm/i915/oa/i915_oa_icl.o
CC drivers/usb/serial/pl2303.o
CC drivers/usb/serial/oti6858.o
CC drivers/gpu/drm/i915/oa/i915_oa_tgl.o
CC drivers/usb/serial/qcserial.o
CC drivers/usb/usbip/vhci_hcd.o
CC drivers/xen/biomerge.o
CC drivers/gpu/drm/i915/i915_perf.o
CC drivers/usb/typec/ucsi/ucsi_acpi.o
CC drivers/xen/xen-balloon.o
CC drivers/usb/serial/sierra.o
CC drivers/usb/usbip/stub_main.o
CC drivers/usb/usbip/stub_dev.o
CC drivers/usb/typec/bus.o
CC drivers/usb/serial/usb-serial-simple.o
AR net/wireless/built-in.a
CC drivers/gpu/drm/i915/i915_gpu_error.o
CC drivers/xen/evtchn.o
AR net/built-in.a
CC drivers/usb/serial/usb_wwan.o
CC drivers/xen/gntdev.o
CC drivers/gpu/drm/i915/i915_vgpu.o
CC drivers/xen/gntalloc.o
CC drivers/usb/usbip/stub_rx.o
CC drivers/usb/usbip/stub_tx.o
CC drivers/xen/platform-pci.o
CC drivers/usb/usbip/vudc_dev.o
CC drivers/usb/usbip/vudc_sysfs.o
CC drivers/xen/sys-hypervisor.o
CC drivers/usb/usbip/vudc_tx.o
CC drivers/usb/usbip/vudc_rx.o
CC drivers/xen/swiotlb-xen.o
CC drivers/usb/usbip/vudc_transfer.o
CC drivers/xen/privcmd.o
CC drivers/xen/mcelog.o
CC drivers/usb/usbip/vudc_main.o
CC drivers/xen/privcmd-buf.o
CC drivers/xen/xen-acpi-processor.o
CC drivers/xen/pvcalls-back.o
CC drivers/xen/efi.o
CC drivers/xen/xlate_mmu.o
CC drivers/xen/xen-front-pgdir-shbuf.o
CC drivers/xen/pvcalls-front.o
AR drivers/usb/typec/ucsi/built-in.a
AR drivers/usb/gadget/function/built-in.a
AR drivers/usb/gadget/built-in.a
AR drivers/usb/storage/built-in.a
AR drivers/usb/core/built-in.a
AR drivers/scsi/built-in.a
AR drivers/usb/serial/built-in.a
AR drivers/usb/usbip/built-in.a
AR drivers/xen/built-in.a
AR drivers/usb/typec/tcpm/built-in.a
AR drivers/usb/typec/built-in.a
AR drivers/usb/host/built-in.a
AR drivers/usb/built-in.a

AR drivers/gpu/drm/i915/built-in.a
AR drivers/gpu/drm/built-in.a
AR drivers/gpu/built-in.a
AR drivers/built-in.a
GEN .version
CHK include/generated/compile.h
LD vmlinux.o
MODPOST vmlinux.o
MODINFO modules.builtin.modinfo
BTF: .tmp_vmlinux.btf: pahole version v1.9 is too old, need at least v1.13
Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
Makefile:1078: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 1


Error text is too large and was truncated, full error text is at:

https://syzkaller.appspot.com/x/error.txt?x=1538f735e00000

[syzbot]

Hello,

syzbot tried to test the proposed patch but build/boot failed:

u/drm/i915/display/intel_dvo.o
AR drivers/usb/class/built-in.a
CC drivers/tty/serial/8250/8250_mid.o
CC drivers/tty/serial/8250/8250_lpss.o
CC drivers/usb/common/debug.o
AR drivers/net/xen-netback/built-in.a
CC net/netfilter/xt_conntrack.o
CC drivers/usb/dwc3/core.o
CC drivers/usb/early/ehci-dbgp.o
CC drivers/usb/dwc3/trace.o
CC drivers/usb/dwc3/gadget.o
CC drivers/usb/dwc3/ep0.o
CC drivers/video/fbdev/core/fbsysfs.o
AR drivers/net/wireless/built-in.a
CC drivers/usb/common/ulpi.o
CC drivers/gpu/drm/i915/display/intel_gmbus.o
CC net/netfilter/xt_cpu.o
CC drivers/video/fbdev/simplefb.o
CC net/netfilter/xt_dccp.o
CC drivers/usb/gadget/function/f_acm.o
CC net/netfilter/xt_devgroup.o
CC net/netfilter/xt_ecn.o
CC net/netfilter/xt_dscp.o
CC drivers/usb/host/pci-quirks.o
CC drivers/media/rc/keymaps/rc-terratec-cinergy-xs.o
CC drivers/usb/misc/ezusb.o
CC drivers/gpu/drm/i915/display/intel_hdmi.o
AR drivers/watchdog/built-in.a
CC drivers/gpu/drm/i915/display/intel_lspcon.o
CC drivers/usb/host/ehci-hcd.o
CC drivers/gpu/drm/i915/display/intel_lvds.o
CC drivers/tty/vt/vt_ioctl.o
CC drivers/tty/vt/vc_screen.o
CC drivers/xen/events/events_2l.o
CC drivers/xen/events/events_base.o
CC drivers/xen/events/events_fifo.o
CC drivers/usb/mon/mon_main.o
AR drivers/vhost/built-in.a
CC drivers/usb/phy/phy.o
CC fs/xfs/xfs_icreate_item.o
CC drivers/usb/mon/mon_text.o
CC drivers/usb/mon/mon_stat.o
CC drivers/video/fbdev/vfb.o
CC drivers/tty/tty_io.o
CC drivers/media/rc/keymaps/rc-terratec-slim.o
CC drivers/tty/vt/selection.o
CC drivers/gpu/drm/i915/display/intel_panel.o
CC net/netfilter/xt_esp.o
CC fs/xfs/xfs_inode_item.o
CC drivers/video/fbdev/core/modedb.o
CC drivers/video/fbdev/core/fbcvt.o
CC drivers/usb/core/hub.o
CC drivers/video/fbdev/core/fb_defio.o
CC net/netfilter/xt_hashlimit.o
CC drivers/usb/gadget/function/u_serial.o
CC net/netfilter/xt_helper.o
AR drivers/usb/common/built-in.a
AR drivers/virtio/built-in.a
AR drivers/usb/early/built-in.a
CC fs/xfs/xfs_refcount_item.o
CC drivers/usb/gadget/function/u_ether.o
CC drivers/usb/gadget/function/f_rndis.o
CC drivers/gpu/drm/i915/display/intel_sdvo.o
AR drivers/usb/misc/built-in.a
CC net/netfilter/xt_hl.o
CC drivers/tty/vt/keyboard.o
CC drivers/tty/vt/consolemap.o
CC drivers/usb/gadget/legacy/multi.o
CC drivers/media/rc/keymaps/rc-terratec-slim-2.o
CC drivers/usb/gadget/udc/core.o
CC drivers/media/rc/keymaps/rc-tevii-nec.o
CC drivers/net/mii.o
CC drivers/usb/gadget/udc/trace.o
CC drivers/usb/gadget/udc/dummy_hcd.o
CC drivers/net/Space.o
CC fs/xfs/xfs_rmap_item.o
CC drivers/usb/mon/mon_bin.o
AR net/wireless/built-in.a
CC drivers/usb/phy/phy-generic.o
CC drivers/xen/xen-pciback/pci_stub.o
CC drivers/usb/dwc3/debugfs.o
CC drivers/usb/dwc3/dwc3-pci.o

CC drivers/xen/xen-pciback/pciback_ops.o
CC drivers/xen/xen-pciback/xenbus.o
CC drivers/xen/xen-pciback/conf_space.o

CC drivers/xen/xen-pciback/conf_space_capability.o
CC drivers/xen/xen-pciback/conf_space_header.o
CC drivers/usb/core/hcd.o
CC drivers/usb/gadget/function/rndis.o
HOSTCC drivers/tty/vt/conmakehash
CC drivers/usb/dwc3/dwc3-haps.o
CC drivers/video/fbdev/core/fbcon.o
CC drivers/tty/vt/vt.o
AR drivers/net/usb/built-in.a
SHIPPED drivers/tty/vt/defkeymap.c
CC drivers/media/rc/keymaps/rc-tivo.o
CC drivers/gpu/drm/i915/display/intel_tv.o
CC drivers/video/fbdev/core/bitblit.o
CC net/netfilter/xt_ipcomp.o
AR drivers/tty/serial/8250/built-in.a
CC drivers/usb/gadget/usbstring.o
CC drivers/gpu/drm/i915/display/intel_vdsc.o
AR drivers/tty/serial/built-in.a
CC net/netfilter/xt_iprange.o
CC drivers/tty/vt/defkeymap.o
CC drivers/usb/roles/class.o
CC drivers/gpu/drm/i915/display/vlv_dsi.o
CC drivers/media/rc/keymaps/rc-total-media-in-hand.o
CC drivers/media/rc/keymaps/rc-total-media-in-hand-02.o
CC fs/xfs/xfs_log_recover.o
CC net/netfilter/xt_ipvs.o
CC drivers/net/loopback.o
CC drivers/xen/xen-pciback/conf_space_quirks.o
CONMK drivers/tty/vt/consolemap_deftbl.c
AR drivers/usb/gadget/legacy/built-in.a
CC fs/xfs/xfs_trans_ail.o
CC drivers/usb/gadget/function/f_mass_storage.o
CC fs/xfs/xfs_trans_buf.o
CC drivers/tty/vt/consolemap_deftbl.o
CC fs/xfs/xfs_dquot.o
CC fs/xfs/xfs_dquot_item.o
CC drivers/xen/xen-pciback/vpci.o
CC drivers/video/fbdev/core/softcursor.o
CC drivers/net/netconsole.o
CC drivers/usb/gadget/function/storage_common.o
CC drivers/usb/serial/usb-serial.o
CC drivers/usb/serial/generic.o
CC drivers/usb/serial/bus.o
CC net/netfilter/xt_l2tp.o
CC drivers/xen/xenbus/xenbus_client.o
CC drivers/media/rc/keymaps/rc-trekstor.o
CC drivers/video/fbdev/core/tileblit.o
CC drivers/net/tun.o
AR drivers/usb/phy/built-in.a
CC drivers/usb/gadget/function/f_fs.o
CC drivers/net/tap.o
CC drivers/usb/core/urb.o
CC drivers/media/rc/keymaps/rc-tt-1500.o
CC net/netfilter/xt_length.o
CC net/netfilter/xt_limit.o
AR drivers/xen/events/built-in.a
CC drivers/usb/gadget/function/f_midi.o
CC drivers/xen/xenbus/xenbus_comms.o
AR drivers/usb/mon/built-in.a
CC drivers/usb/gadget/config.o
CC net/netfilter/xt_mac.o
CC drivers/xen/xenfs/super.o
CC drivers/xen/xen-pciback/passthrough.o
CC drivers/usb/serial/ch341.o
AR drivers/usb/roles/built-in.a
CC drivers/usb/storage/uas.o
CC drivers/gpu/drm/i915/display/vlv_dsi_pll.o
CC drivers/tty/n_tty.o
CC drivers/gpu/drm/i915/oa/i915_oa_bdw.o
CC drivers/gpu/drm/i915/oa/i915_oa_hsw.o
CC drivers/media/rc/keymaps/rc-twinhan-dtv-cab-ci.o
CC net/netfilter/xt_multiport.o
CC drivers/gpu/drm/i915/oa/i915_oa_chv.o
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt2.o
CC drivers/usb/serial/cp210x.o
AR drivers/usb/typec/altmodes/built-in.a
AR drivers/usb/typec/mux/built-in.a
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt3.o
CC drivers/usb/typec/ucsi/ucsi.o
CC drivers/usb/typec/tcpm/tcpm.o
CC net/netfilter/xt_nfacct.o
CC drivers/usb/typec/class.o
CC drivers/usb/gadget/composite.o
CC drivers/usb/gadget/epautoconf.o
CC drivers/usb/gadget/functions.o
CC drivers/net/veth.o
CC drivers/usb/typec/mux.o
CC drivers/xen/xenfs/xensyms.o
CC drivers/xen/xenfs/xenstored.o
CC drivers/media/rc/keymaps/rc-twinhan1027.o
CC net/netfilter/xt_osf.o
CC fs/xfs/xfs_trans_dquot.o
CC drivers/xen/xenbus/xenbus_xs.o
AR drivers/xen/xen-pciback/built-in.a
CC drivers/usb/core/message.o
CC drivers/xen/xenbus/xenbus_probe.o
CC drivers/xen/cpu_hotplug.o
CC drivers/xen/grant-table.o
CC drivers/usb/core/driver.o
AR drivers/usb/gadget/udc/built-in.a
CC drivers/usb/serial/ftdi_sio.o
CC drivers/xen/xenbus/xenbus_probe_backend.o
CC drivers/usb/storage/scsiglue.o
CC drivers/usb/storage/protocol.o
CC drivers/xen/xenbus/xenbus_dev_frontend.o
CC drivers/usb/usbip/usbip_common.o
CC drivers/usb/storage/transport.o
CC net/netfilter/xt_cgroup.o
CC net/netfilter/xt_owner.o
CC drivers/gpu/drm/i915/oa/i915_oa_sklgt4.o
CC drivers/usb/typec/bus.o
CC drivers/media/rc/keymaps/rc-vega-s9x.o
CC drivers/gpu/drm/i915/oa/i915_oa_bxt.o
CC drivers/usb/serial/keyspan.o
CC net/netfilter/xt_physdev.o
CC drivers/usb/serial/option.o
CC net/netfilter/xt_pkttype.o
CC net/netfilter/xt_policy.o
CC drivers/gpu/drm/i915/oa/i915_oa_kblgt2.o
CC fs/xfs/xfs_qm_syscalls.o
CC drivers/tty/tty_ioctl.o
CC fs/xfs/xfs_qm_bhv.o
CC drivers/usb/typec/ucsi/trace.o
CC drivers/gpu/drm/i915/oa/i915_oa_kblgt3.o
CC drivers/xen/xenbus/xenbus_dev_backend.o
CC drivers/xen/features.o
CC drivers/xen/xenbus/xenbus_probe_frontend.o
CC drivers/gpu/drm/i915/oa/i915_oa_glk.o
CC drivers/net/virtio_net.o
CC drivers/net/vxlan.o
CC drivers/xen/balloon.o
CC drivers/usb/serial/oti6858.o
CC drivers/usb/serial/pl2303.o
AR drivers/xen/xenfs/built-in.a
CC drivers/media/rc/keymaps/rc-videomate-m1f.o
CC drivers/usb/serial/qcserial.o
CC drivers/usb/storage/usb.o
CC drivers/usb/gadget/configfs.o
AR drivers/usb/dwc3/built-in.a
CC drivers/media/rc/keymaps/rc-videomate-s350.o
CC drivers/media/rc/keymaps/rc-videomate-tv-pvr.o
CC fs/xfs/xfs_qm.o
CC drivers/usb/core/config.o
CC drivers/usb/serial/sierra.o
CC drivers/gpu/drm/i915/oa/i915_oa_cflgt2.o
CC drivers/net/gtp.o
CC drivers/net/geneve.o
CC drivers/gpu/drm/i915/oa/i915_oa_cflgt3.o
CC drivers/usb/usbip/usbip_event.o
CC fs/xfs/xfs_quotaops.o
CC drivers/usb/usbip/vhci_sysfs.o
CC drivers/usb/usbip/vhci_tx.o
CC drivers/net/vrf.o
CC drivers/usb/gadget/u_f.o
CC drivers/tty/tty_ldisc.o
CC drivers/net/nlmon.o
CC drivers/tty/tty_buffer.o
CC drivers/usb/typec/ucsi/ucsi_acpi.o
CC drivers/usb/storage/initializers.o
CC drivers/usb/core/file.o
CC drivers/usb/core/buffer.o
CC drivers/tty/tty_port.o
CC drivers/gpu/drm/i915/oa/i915_oa_cnl.o
CC net/netfilter/xt_quota.o
CC drivers/media/rc/keymaps/rc-wetek-play2.o
CC drivers/media/rc/keymaps/rc-wetek-hub.o
CC net/netfilter/xt_rateest.o
CC net/netfilter/xt_realm.o
CC fs/xfs/xfs_rtalloc.o
CC net/netfilter/xt_recent.o
CC drivers/video/fbdev/core/cfbfillrect.o
CC fs/xfs/xfs_acl.o
CC drivers/xen/manage.o
CC drivers/video/fbdev/core/cfbcopyarea.o
CC drivers/tty/tty_mutex.o
CC drivers/media/rc/keymaps/rc-winfast.o
CC drivers/usb/serial/usb-serial-simple.o
CC drivers/tty/tty_ldsem.o
AR drivers/xen/xenbus/built-in.a
CC drivers/usb/serial/usb_wwan.o
CC drivers/tty/tty_baudrate.o
CC drivers/net/vsockmon.o
CC drivers/usb/usbip/vhci_rx.o
CC drivers/net/xen-netfront.o
CC drivers/usb/core/sysfs.o
CC drivers/video/fbdev/core/sysfillrect.o
CC drivers/video/fbdev/core/cfbimgblt.o
CC drivers/video/fbdev/core/syscopyarea.o
CC drivers/usb/storage/sierra_ms.o
CC drivers/usb/host/ehci-pci.o
CC drivers/xen/preempt.o
CC drivers/xen/time.o
CC drivers/usb/host/ohci-hcd.o
AR drivers/usb/typec/ucsi/built-in.a
CC drivers/xen/mem-reservation.o
CC drivers/usb/usbip/vhci_hcd.o
CC drivers/gpu/drm/i915/oa/i915_oa_icl.o
CC drivers/tty/tty_jobctrl.o
CC drivers/tty/n_null.o
CC drivers/xen/pci.o
CC drivers/media/rc/keymaps/rc-su3000.o
CC drivers/media/rc/keymaps/rc-winfast-usbii-deluxe.o
AR drivers/usb/gadget/function/built-in.a
CC drivers/media/rc/keymaps/rc-xbox-dvd.o
CC drivers/usb/host/ohci-pci.o
CC fs/xfs/xfs_sysctl.o
CC drivers/net/net_failover.o
CC drivers/video/fbdev/core/sysimgblt.o
CC drivers/tty/pty.o
CC drivers/usb/usbip/stub_dev.o
CC drivers/gpu/drm/i915/oa/i915_oa_tgl.o
AR drivers/scsi/built-in.a
CC net/netfilter/xt_sctp.o
CC drivers/xen/dbgp.o
CC drivers/usb/storage/option_ms.o
CC net/netfilter/xt_socket.o
CC drivers/tty/tty_audit.o
CC fs/xfs/xfs_ioctl32.o
CC net/netfilter/xt_state.o
CC fs/xfs/xfs_pnfs.o
CC drivers/usb/host/uhci-hcd.o
CC drivers/usb/storage/usual-tables.o
CC drivers/usb/usbip/stub_main.o
CC drivers/xen/acpi.o
CC drivers/xen/xen-acpi-pad.o
CC drivers/video/fbdev/core/fb_sys_fops.o

CC drivers/gpu/drm/i915/i915_perf.o
CC drivers/gpu/drm/i915/i915_gpu_error.o
CC drivers/gpu/drm/i915/i915_vgpu.o

CC drivers/usb/storage/realtek_cr.o
CC drivers/usb/core/endpoint.o
CC drivers/usb/host/xhci.o
CC drivers/usb/core/devio.o
CC drivers/usb/host/xhci-mem.o
CC drivers/media/rc/keymaps/rc-x96max.o
AR drivers/tty/vt/built-in.a
CC drivers/usb/host/xhci-ext-caps.o
CC drivers/usb/host/xhci-ring.o
CC drivers/usb/host/xhci-dbg.o
CC drivers/usb/host/xhci-hub.o
CC drivers/usb/core/notify.o
CC net/netfilter/xt_statistic.o
CC net/netfilter/xt_string.o
CC net/netfilter/xt_tcpmss.o
AR drivers/usb/gadget/built-in.a
CC drivers/usb/core/generic.o
CC drivers/xen/pcpu.o
CC drivers/usb/usbip/stub_rx.o
CC drivers/xen/biomerge.o
CC drivers/tty/n_hdlc.o
CC drivers/tty/sysrq.o
CC drivers/usb/core/quirks.o
CC drivers/tty/ttynull.o
CC drivers/usb/core/devices.o
CC drivers/xen/xen-balloon.o
CC drivers/usb/host/xhci-trace.o
CC drivers/usb/host/xhci-debugfs.o
CC drivers/usb/host/xhci-pci.o
CC drivers/usb/core/phy.o
CC drivers/usb/host/xhci-plat.o
CC drivers/media/rc/keymaps/rc-zx-irdec.o
CC drivers/usb/core/port.o
CC drivers/usb/usbip/stub_tx.o
CC drivers/usb/core/hcd-pci.o
CC net/netfilter/xt_time.o
CC drivers/usb/usbip/vudc_dev.o
CC drivers/xen/evtchn.o
CC drivers/usb/core/usb-acpi.o
AR drivers/usb/serial/built-in.a
CC net/netfilter/xt_u32.o
CC drivers/xen/gntdev.o
CC drivers/usb/usbip/vudc_sysfs.o
CC drivers/xen/gntalloc.o
CC drivers/xen/sys-hypervisor.o
CC drivers/usb/usbip/vudc_tx.o
CC drivers/xen/platform-pci.o
CC drivers/usb/usbip/vudc_rx.o
CC drivers/xen/swiotlb-xen.o
AR drivers/video/fbdev/core/built-in.a
CC drivers/xen/mcelog.o
CC drivers/usb/usbip/vudc_transfer.o
AR drivers/video/fbdev/built-in.a
CC drivers/usb/usbip/vudc_main.o
AR drivers/video/built-in.a
CC drivers/xen/privcmd.o
CC drivers/xen/xen-acpi-processor.o
CC drivers/xen/privcmd-buf.o
CC drivers/xen/efi.o
CC drivers/xen/xlate_mmu.o
CC drivers/xen/pvcalls-back.o
AR drivers/media/rc/keymaps/built-in.a
CC drivers/xen/pvcalls-front.o
AR drivers/media/rc/built-in.a
AR drivers/media/built-in.a
CC drivers/xen/xen-front-pgdir-shbuf.o
AR drivers/usb/storage/built-in.a
AR drivers/usb/typec/tcpm/built-in.a
AR drivers/usb/typec/built-in.a
AR net/netfilter/built-in.a
AR net/built-in.a
AR drivers/tty/built-in.a
AR drivers/usb/usbip/built-in.a
AR fs/xfs/built-in.a
AR fs/built-in.a
AR drivers/usb/core/built-in.a

AR drivers/gpu/drm/i915/built-in.a
AR drivers/gpu/drm/built-in.a
AR drivers/gpu/built-in.a

AR drivers/net/built-in.a
AR drivers/xen/built-in.a
AR drivers/usb/host/built-in.a
AR drivers/usb/built-in.a

AR drivers/built-in.a
GEN .version
CHK include/generated/compile.h
LD vmlinux.o
MODPOST vmlinux.o
MODINFO modules.builtin.modinfo

BTF .btf.vmlinux.bin.o
LD .tmp_vmlinux.btf
pahole: invalid option -- 'J'
Try `pahole --help' or `pahole --usage' for more information.
objcopy: --change-section-vma .BTF=0x0000000000000000 never used
objcopy: --change-section-lma .BTF=0x0000000000000000 never used
objcopy: error: the input file '.btf.vmlinux.bin' is empty

Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
Makefile:1078: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 1


Error text is too large and was truncated, full error text is at:

https://syzkaller.appspot.com/x/error.txt?x=16e590e9e00000


Tested on:

commit: fc593e11 workaround the pahole version check

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger crash:

Reported-and-tested-by: syzbot+35d4de...@syzkaller.appspotmail.com

Tested on:

commit: 331ae12a workaround the pahole version check

git tree: https://github.com/congwang/linux.git syzbot

kernel config: https://syzkaller.appspot.com/x/.config?x=776e022e1a2b15ea

dashboard link: https://syzkaller.appspot.com/bug?extid=35d4dea36c387813ed31
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

Note: testing is done by a robot and is best-effort only.