[v5.15] KASAN: use-after-free Write in usb_anchor_suspend_wakeups
3 views
Skip to first unread message
syzbot
May 23, 2023, 11:23:54 PM5/23/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 9d6bde853685 Linux 5.15.112
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12e8fdd9280000
kernel config: https://syzkaller.appspot.com/x/.config?x=a61e8195d8bdf36e
dashboard link: https://syzkaller.appspot.com/bug?extid=987bb9afc00ca2700db0
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1693c361280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17dbb419280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b65d6c2ec328/disk-9d6bde85.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cf811ebac37b/vmlinux-9d6bde85.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b2f32fdecf97/bzImage-9d6bde85.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+987bb9...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
BUG: KASAN: use-after-free in usb_anchor_suspend_wakeups+0x24/0x40 drivers/usb/core/urb.c:940
Write of size 4 at addr ffff88807e352910 by task udevd/3540
CPU: 1 PID: 3540 Comm: udevd Not tainted 5.15.112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
kasan_check_range+0x27e/0x290 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
usb_anchor_suspend_wakeups+0x24/0x40 drivers/usb/core/urb.c:940
__usb_hcd_giveback_urb+0x25d/0x530 drivers/usb/core/hcd.c:1657
dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1987
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1737
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
__do_softirq+0x3b3/0x93a kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:218 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x83/0xe0 kernel/kcov.c:320
Code: 8b 74 d6 10 65 8b 05 24 82 82 7e a9 00 01 ff 00 74 11 a9 00 01 00 00 74 de 41 83 bb 34 16 00 00 00 74 d4 41 8b 83 10 16 00 00 <83> f8 03 75 c8 49 8b 8b 18 16 00 00 45 8b bb 14 16 00 00 49 c1 e7
RSP: 0018:ffffc90002e6f778 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8af97042 RCX: 000000000000008b
RDX: 0000000000000000 RSI: ffffffff8cf28b40 RDI: 000000000000000a
RBP: ffffc90002e6f890 R08: 0000000000000001 R09: ffffffff842b13cc
R10: 0000000000000002 R11: ffff888072540000 R12: ffffffff8af97042
R13: 1ffff920005cdf04 R14: 0000000000000000 R15: 000000000000000a
format_decode+0x22c/0x1f10 lib/vsprintf.c:2540
vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2758
vscnprintf+0x29/0x80 lib/vsprintf.c:2909
sysfs_emit_at+0x126/0x1a0 fs/sysfs/file.c:770
uevent_show+0x279/0x320 drivers/base/core.c:2399
dev_attr_show+0x50/0xb0 drivers/base/core.c:2095
sysfs_kf_seq_show+0x313/0x4e0 fs/sysfs/file.c:61
seq_read_iter+0x43a/0xd10 fs/seq_file.c:230
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa9f/0xe10 fs/read_write.c:485
ksys_read+0x1a2/0x2c0 fs/read_write.c:623
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f73d15a9b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd95faad88 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055b0fe7814f0 RCX: 00007f73d15a9b6a
RDX: 0000000000001000 RSI: 000055b0fe76a950 RDI: 0000000000000008
RBP: 000055b0fe7814f0 R08: 0000000000000008 R09: 0000000000000200
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffd95fab268 R15: 000000000000000a
</TASK>
Allocated by task 5408:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
kmem_cache_alloc_trace+0x143/0x290 mm/slub.c:3247
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
usbtmc_open+0x8f/0x880 drivers/usb/class/usbtmc.c:175
usb_open+0x21a/0x2f0 drivers/usb/core/file.c:48
chrdev_open+0x54a/0x630 fs/char_dev.c:414
do_dentry_open+0x807/0xfb0 fs/open.c:826
do_open fs/namei.c:3538 [inline]
path_openat+0x2702/0x2f20 fs/namei.c:3672
do_filp_open+0x21c/0x460 fs/namei.c:3699
do_sys_openat2+0x13b/0x500 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Freed by task 5408:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xf1/0x270 mm/slub.c:4559
usbtmc_release+0x24b/0x280 drivers/usb/class/usbtmc.c:261
__fput+0x3bf/0x890 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88807e352800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
1024-byte region [ffff88807e352800, ffff88807e352c00)
The buggy address belongs to the page:
page:ffffea0001f8d400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e350
head:ffffea0001f8d400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888011c41dc0
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3341, ts 34385932326, free_ts 34369924782
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5421
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
slab_alloc mm/slub.c:3228 [inline]
__kmalloc+0x1c9/0x300 mm/slub.c:4403
kmalloc include/linux/slab.h:596 [inline]
load_elf_phdrs fs/binfmt_elf.c:480 [inline]
load_elf_binary+0x2ec/0x2750 fs/binfmt_elf.c:860
search_binary_handler fs/exec.c:1734 [inline]
exec_binprm fs/exec.c:1775 [inline]
bprm_execve+0x8fd/0x17c0 fs/exec.c:1844
do_execveat_common+0x583/0x720 fs/exec.c:1949
do_execve fs/exec.c:2019 [inline]
__do_sys_execve fs/exec.c:2095 [inline]
__se_sys_execve fs/exec.c:2090 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2090
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
free_slab mm/slub.c:2015 [inline]
discard_slab mm/slub.c:2021 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2507
put_cpu_partial+0x132/0x1a0 mm/slub.c:2587
do_slab_free mm/slub.c:3487 [inline]
___cache_free+0xe3/0x100 mm/slub.c:3506
qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
getname_flags+0xb8/0x4e0 fs/namei.c:138
do_sys_openat2+0xd2/0x500 fs/open.c:1205
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Memory state around the buggy address:
ffff88807e352800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807e352880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807e352900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807e352980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807e352a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 8b 74 d6 10 mov 0x10(%rsi,%rdx,8),%esi
4: 65 8b 05 24 82 82 7e mov %gs:0x7e828224(%rip),%eax # 0x7e82822f
b: a9 00 01 ff 00 test $0xff0100,%eax
10: 74 11 je 0x23
12: a9 00 01 00 00 test $0x100,%eax
17: 74 de je 0xfffffff7
19: 41 83 bb 34 16 00 00 cmpl $0x0,0x1634(%r11)
20: 00
21: 74 d4 je 0xfffffff7
23: 41 8b 83 10 16 00 00 mov 0x1610(%r11),%eax
* 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction
2d: 75 c8 jne 0xfffffff7
2f: 49 8b 8b 18 16 00 00 mov 0x1618(%r11),%rcx
36: 45 8b bb 14 16 00 00 mov 0x1614(%r11),%r15d
3d: 49 rex.WB
3e: c1 .byte 0xc1
3f: e7 .byte 0xe7
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 9d6bde853685 Linux 5.15.112
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12e8fdd9280000
kernel config: https://syzkaller.appspot.com/x/.config?x=a61e8195d8bdf36e
dashboard link: https://syzkaller.appspot.com/bug?extid=987bb9afc00ca2700db0
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1693c361280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17dbb419280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b65d6c2ec328/disk-9d6bde85.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cf811ebac37b/vmlinux-9d6bde85.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b2f32fdecf97/bzImage-9d6bde85.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+987bb9...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
BUG: KASAN: use-after-free in usb_anchor_suspend_wakeups+0x24/0x40 drivers/usb/core/urb.c:940
Write of size 4 at addr ffff88807e352910 by task udevd/3540
CPU: 1 PID: 3540 Comm: udevd Not tainted 5.15.112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
kasan_check_range+0x27e/0x290 mm/kasan/generic.c:189
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
usb_anchor_suspend_wakeups+0x24/0x40 drivers/usb/core/urb.c:940
__usb_hcd_giveback_urb+0x25d/0x530 drivers/usb/core/hcd.c:1657
dummy_timer+0x8ad/0x3200 drivers/usb/gadget/udc/dummy_hcd.c:1987
call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1737
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
__do_softirq+0x3b3/0x93a kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:218 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x83/0xe0 kernel/kcov.c:320
Code: 8b 74 d6 10 65 8b 05 24 82 82 7e a9 00 01 ff 00 74 11 a9 00 01 00 00 74 de 41 83 bb 34 16 00 00 00 74 d4 41 8b 83 10 16 00 00 <83> f8 03 75 c8 49 8b 8b 18 16 00 00 45 8b bb 14 16 00 00 49 c1 e7
RSP: 0018:ffffc90002e6f778 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8af97042 RCX: 000000000000008b
RDX: 0000000000000000 RSI: ffffffff8cf28b40 RDI: 000000000000000a
RBP: ffffc90002e6f890 R08: 0000000000000001 R09: ffffffff842b13cc
R10: 0000000000000002 R11: ffff888072540000 R12: ffffffff8af97042
R13: 1ffff920005cdf04 R14: 0000000000000000 R15: 000000000000000a
format_decode+0x22c/0x1f10 lib/vsprintf.c:2540
vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2758
vscnprintf+0x29/0x80 lib/vsprintf.c:2909
sysfs_emit_at+0x126/0x1a0 fs/sysfs/file.c:770
uevent_show+0x279/0x320 drivers/base/core.c:2399
dev_attr_show+0x50/0xb0 drivers/base/core.c:2095
sysfs_kf_seq_show+0x313/0x4e0 fs/sysfs/file.c:61
seq_read_iter+0x43a/0xd10 fs/seq_file.c:230
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa9f/0xe10 fs/read_write.c:485
ksys_read+0x1a2/0x2c0 fs/read_write.c:623
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f73d15a9b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd95faad88 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055b0fe7814f0 RCX: 00007f73d15a9b6a
RDX: 0000000000001000 RSI: 000055b0fe76a950 RDI: 0000000000000008
RBP: 000055b0fe7814f0 R08: 0000000000000008 R09: 0000000000000200
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffd95fab268 R15: 000000000000000a
</TASK>
Allocated by task 5408:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
kmem_cache_alloc_trace+0x143/0x290 mm/slub.c:3247
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
usbtmc_open+0x8f/0x880 drivers/usb/class/usbtmc.c:175
usb_open+0x21a/0x2f0 drivers/usb/core/file.c:48
chrdev_open+0x54a/0x630 fs/char_dev.c:414
do_dentry_open+0x807/0xfb0 fs/open.c:826
do_open fs/namei.c:3538 [inline]
path_openat+0x2702/0x2f20 fs/namei.c:3672
do_filp_open+0x21c/0x460 fs/namei.c:3699
do_sys_openat2+0x13b/0x500 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Freed by task 5408:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xf1/0x270 mm/slub.c:4559
usbtmc_release+0x24b/0x280 drivers/usb/class/usbtmc.c:261
__fput+0x3bf/0x890 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88807e352800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
1024-byte region [ffff88807e352800, ffff88807e352c00)
The buggy address belongs to the page:
page:ffffea0001f8d400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e350
head:ffffea0001f8d400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888011c41dc0
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3341, ts 34385932326, free_ts 34369924782
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5421
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
slab_alloc mm/slub.c:3228 [inline]
__kmalloc+0x1c9/0x300 mm/slub.c:4403
kmalloc include/linux/slab.h:596 [inline]
load_elf_phdrs fs/binfmt_elf.c:480 [inline]
load_elf_binary+0x2ec/0x2750 fs/binfmt_elf.c:860
search_binary_handler fs/exec.c:1734 [inline]
exec_binprm fs/exec.c:1775 [inline]
bprm_execve+0x8fd/0x17c0 fs/exec.c:1844
do_execveat_common+0x583/0x720 fs/exec.c:1949
do_execve fs/exec.c:2019 [inline]
__do_sys_execve fs/exec.c:2095 [inline]
__se_sys_execve fs/exec.c:2090 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2090
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
free_slab mm/slub.c:2015 [inline]
discard_slab mm/slub.c:2021 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2507
put_cpu_partial+0x132/0x1a0 mm/slub.c:2587
do_slab_free mm/slub.c:3487 [inline]
___cache_free+0xe3/0x100 mm/slub.c:3506
qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x53/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3220 [inline]
slab_alloc mm/slub.c:3228 [inline]
kmem_cache_alloc+0xf3/0x280 mm/slub.c:3233
getname_flags+0xb8/0x4e0 fs/namei.c:138
do_sys_openat2+0xd2/0x500 fs/open.c:1205
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Memory state around the buggy address:
ffff88807e352800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807e352880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807e352900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807e352980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807e352a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 8b 74 d6 10 mov 0x10(%rsi,%rdx,8),%esi
4: 65 8b 05 24 82 82 7e mov %gs:0x7e828224(%rip),%eax # 0x7e82822f
b: a9 00 01 ff 00 test $0xff0100,%eax
10: 74 11 je 0x23
12: a9 00 01 00 00 test $0x100,%eax
17: 74 de je 0xfffffff7
19: 41 83 bb 34 16 00 00 cmpl $0x0,0x1634(%r11)
20: 00
21: 74 d4 je 0xfffffff7
23: 41 8b 83 10 16 00 00 mov 0x1610(%r11),%eax
* 2a: 83 f8 03 cmp $0x3,%eax <-- trapping instruction
2d: 75 c8 jne 0xfffffff7
2f: 49 8b 8b 18 16 00 00 mov 0x1618(%r11),%rcx
36: 45 8b bb 14 16 00 00 mov 0x1614(%r11),%r15d
3d: 49 rex.WB
3e: c1 .byte 0xc1
3f: e7 .byte 0xe7
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
Reply all
Reply to author
Forward
0 new messages