[syzbot] KASAN: use-after-free Read in ieee80211_scan_rx (2)
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syzbot
Jul 30, 2021, 5:52:21 AM7/30/21
to da...@davemloft.net, joha...@sipsolutions.net, ku...@kernel.org, linux-...@vger.kernel.org, linux-w...@vger.kernel.org, net...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: ff1176468d36 Linux 5.14-rc3
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15bb59b2300000
kernel config: https://syzkaller.appspot.com/x/.config?x=1dee114394f7d2c2
dashboard link: https://syzkaller.appspot.com/bug?extid=6cb476b7c69916a0caca
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6cb476...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in ieee80211_scan_rx+0x7d0/0x7e0 net/mac80211/scan.c:289
Read of size 4 at addr ffff88801559922c by task syz-executor.0/14290
CPU: 0 PID: 14290 Comm: syz-executor.0 Not tainted 5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
print_address_description.constprop.0.cold+0x6c/0x2d6 mm/kasan/report.c:233
__kasan_report mm/kasan/report.c:419 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
ieee80211_scan_rx+0x7d0/0x7e0 net/mac80211/scan.c:289
__ieee80211_rx_handle_packet net/mac80211/rx.c:4707 [inline]
ieee80211_rx_list+0x20e8/0x27b0 net/mac80211/rx.c:4899
ieee80211_rx_napi+0xdb/0x3d0 net/mac80211/rx.c:4922
ieee80211_rx include/net/mac80211.h:4552 [inline]
ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235
tasklet_action_common.constprop.0+0x201/0x2e0 kernel/softirq.c:783
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
do_softirq.part.0+0xde/0x130 kernel/softirq.c:459
</IRQ>
do_softirq kernel/softirq.c:451 [inline]
__local_bh_enable_ip+0x102/0x120 kernel/softirq.c:383
local_bh_enable include/linux/bottom_half.h:32 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:757 [inline]
__dev_queue_xmit+0x1b04/0x3620 net/core/dev.c:4312
__netlink_deliver_tap_skb net/netlink/af_netlink.c:303 [inline]
__netlink_deliver_tap net/netlink/af_netlink.c:321 [inline]
netlink_deliver_tap+0x9b5/0xbc0 net/netlink/af_netlink.c:334
__netlink_sendskb net/netlink/af_netlink.c:1258 [inline]
netlink_sendskb net/netlink/af_netlink.c:1267 [inline]
netlink_unicast+0x697/0x7d0 net/netlink/af_netlink.c:1355
nlmsg_unicast include/net/netlink.h:1050 [inline]
netlink_ack+0x5ec/0xa60 net/netlink/af_netlink.c:2474
netlink_rcv_skb+0x33d/0x420 net/netlink/af_netlink.c:2510
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
__sys_sendto+0x21c/0x320 net/socket.c:2019
__do_sys_sendto net/socket.c:2031 [inline]
__se_sys_sendto net/socket.c:2027 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2027
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x41957c
Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b
RSP: 002b:00007f82fca71030 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f82fca710f0 RCX: 000000000041957c
RDX: 0000000000000064 RSI: 00007f82fca71140 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007f82fca71084 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f82fca71140 R14: 0000000000000005 R15: 0000000000000000
Allocated by task 14295:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0x98/0xc0 mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
__do_kmalloc mm/slab.c:3702 [inline]
__kmalloc+0x214/0x4d0 mm/slab.c:3711
kmalloc include/linux/slab.h:596 [inline]
kzalloc include/linux/slab.h:721 [inline]
cfg80211_conn_scan+0x195/0xfd0 net/wireless/sme.c:80
cfg80211_sme_connect net/wireless/sme.c:585 [inline]
cfg80211_connect+0x15d0/0x2010 net/wireless/sme.c:1257
nl80211_connect+0x1647/0x22a0 net/wireless/nl80211.c:10923
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 15038:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xcd/0x100 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
__cache_free mm/slab.c:3445 [inline]
kfree+0x106/0x2c0 mm/slab.c:3803
___cfg80211_scan_done+0x474/0x960 net/wireless/scan.c:984
__cfg80211_scan_done+0x2c/0x40 net/wireless/scan.c:1001
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xa4/0xd0 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3029 [inline]
call_rcu+0xb1/0x750 kernel/rcu/tree.c:3109
fib6_info_release include/net/ip6_fib.h:337 [inline]
fib6_info_release include/net/ip6_fib.h:334 [inline]
ip6_route_add+0x12d/0x150 net/ipv6/route.c:3861
addrconf_prefix_route+0x30a/0x4e0 net/ipv6/addrconf.c:2415
sit_add_v4_addrs net/ipv6/addrconf.c:3137 [inline]
addrconf_sit_config net/ipv6/addrconf.c:3387 [inline]
addrconf_notify+0x1a96/0x2400 net/ipv6/addrconf.c:3580
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
call_netdevice_notifiers_extack net/core/dev.c:2135 [inline]
call_netdevice_notifiers net/core/dev.c:2149 [inline]
__dev_notify_flags+0x110/0x2b0 net/core/dev.c:8860
rtnl_configure_link+0x16b/0x240 net/core/rtnetlink.c:3143
__rtnl_newlink+0x109f/0x1760 net/core/rtnetlink.c:3468
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3508
rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5574
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff888015599200
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 44 bytes inside of
256-byte region [ffff888015599200, ffff888015599300)
The buggy address belongs to the page:
page:ffffea0000556640 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15599
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001e52008 ffffea0002046008 ffff888010840500
raw: 0000000000000000 ffff888015599000 0000000100000008 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 13813, ts 1677185189740, free_ts 1675053513618
prep_new_page mm/page_alloc.c:2436 [inline]
get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4169
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5391
__alloc_pages_node include/linux/gfp.h:570 [inline]
kmem_getpages mm/slab.c:1377 [inline]
cache_grow_begin+0x75/0x460 mm/slab.c:2593
cache_alloc_refill+0x27f/0x380 mm/slab.c:2965
____cache_alloc mm/slab.c:3048 [inline]
____cache_alloc mm/slab.c:3031 [inline]
__do_cache_alloc mm/slab.c:3275 [inline]
slab_alloc mm/slab.c:3316 [inline]
kmem_cache_alloc_trace+0x38c/0x480 mm/slab.c:3573
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
fib6_info_alloc+0xc1/0x210 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x33e/0x1aa0 net/ipv6/route.c:3762
ip6_route_add+0x24/0x150 net/ipv6/route.c:3856
addrconf_prefix_route+0x30a/0x4e0 net/ipv6/addrconf.c:2415
sit_add_v4_addrs net/ipv6/addrconf.c:3137 [inline]
addrconf_sit_config net/ipv6/addrconf.c:3387 [inline]
addrconf_notify+0x1a96/0x2400 net/ipv6/addrconf.c:3580
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
call_netdevice_notifiers_extack net/core/dev.c:2135 [inline]
call_netdevice_notifiers net/core/dev.c:2149 [inline]
__dev_notify_flags+0x110/0x2b0 net/core/dev.c:8860
rtnl_configure_link+0x16b/0x240 net/core/rtnetlink.c:3143
__rtnl_newlink+0x109f/0x1760 net/core/rtnetlink.c:3468
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3508
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1346 [inline]
free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1397
free_unref_page_prepare mm/page_alloc.c:3332 [inline]
free_unref_page_list+0x1a1/0x1050 mm/page_alloc.c:3448
release_pages+0x824/0x20b0 mm/swap.c:972
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
tlb_flush_mmu mm/mmu_gather.c:249 [inline]
tlb_finish_mmu+0x165/0x8c0 mm/mmu_gather.c:340
exit_mmap+0x1ea/0x620 mm/mmap.c:3203
__mmput+0x122/0x470 kernel/fork.c:1101
mmput+0x58/0x60 kernel/fork.c:1122
exit_mm kernel/exit.c:501 [inline]
do_exit+0xae2/0x2a60 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2808
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff888015599100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888015599180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888015599200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888015599280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888015599300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
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.
syzbot found the following issue on:
HEAD commit: ff1176468d36 Linux 5.14-rc3
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15bb59b2300000
kernel config: https://syzkaller.appspot.com/x/.config?x=1dee114394f7d2c2
dashboard link: https://syzkaller.appspot.com/bug?extid=6cb476b7c69916a0caca
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6cb476...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in ieee80211_scan_rx+0x7d0/0x7e0 net/mac80211/scan.c:289
Read of size 4 at addr ffff88801559922c by task syz-executor.0/14290
CPU: 0 PID: 14290 Comm: syz-executor.0 Not tainted 5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
print_address_description.constprop.0.cold+0x6c/0x2d6 mm/kasan/report.c:233
__kasan_report mm/kasan/report.c:419 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
ieee80211_scan_rx+0x7d0/0x7e0 net/mac80211/scan.c:289
__ieee80211_rx_handle_packet net/mac80211/rx.c:4707 [inline]
ieee80211_rx_list+0x20e8/0x27b0 net/mac80211/rx.c:4899
ieee80211_rx_napi+0xdb/0x3d0 net/mac80211/rx.c:4922
ieee80211_rx include/net/mac80211.h:4552 [inline]
ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235
tasklet_action_common.constprop.0+0x201/0x2e0 kernel/softirq.c:783
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
do_softirq.part.0+0xde/0x130 kernel/softirq.c:459
</IRQ>
do_softirq kernel/softirq.c:451 [inline]
__local_bh_enable_ip+0x102/0x120 kernel/softirq.c:383
local_bh_enable include/linux/bottom_half.h:32 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:757 [inline]
__dev_queue_xmit+0x1b04/0x3620 net/core/dev.c:4312
__netlink_deliver_tap_skb net/netlink/af_netlink.c:303 [inline]
__netlink_deliver_tap net/netlink/af_netlink.c:321 [inline]
netlink_deliver_tap+0x9b5/0xbc0 net/netlink/af_netlink.c:334
__netlink_sendskb net/netlink/af_netlink.c:1258 [inline]
netlink_sendskb net/netlink/af_netlink.c:1267 [inline]
netlink_unicast+0x697/0x7d0 net/netlink/af_netlink.c:1355
nlmsg_unicast include/net/netlink.h:1050 [inline]
netlink_ack+0x5ec/0xa60 net/netlink/af_netlink.c:2474
netlink_rcv_skb+0x33d/0x420 net/netlink/af_netlink.c:2510
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
__sys_sendto+0x21c/0x320 net/socket.c:2019
__do_sys_sendto net/socket.c:2031 [inline]
__se_sys_sendto net/socket.c:2027 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2027
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x41957c
Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b
RSP: 002b:00007f82fca71030 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f82fca710f0 RCX: 000000000041957c
RDX: 0000000000000064 RSI: 00007f82fca71140 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007f82fca71084 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f82fca71140 R14: 0000000000000005 R15: 0000000000000000
Allocated by task 14295:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0x98/0xc0 mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
__do_kmalloc mm/slab.c:3702 [inline]
__kmalloc+0x214/0x4d0 mm/slab.c:3711
kmalloc include/linux/slab.h:596 [inline]
kzalloc include/linux/slab.h:721 [inline]
cfg80211_conn_scan+0x195/0xfd0 net/wireless/sme.c:80
cfg80211_sme_connect net/wireless/sme.c:585 [inline]
cfg80211_connect+0x15d0/0x2010 net/wireless/sme.c:1257
nl80211_connect+0x1647/0x22a0 net/wireless/nl80211.c:10923
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Freed by task 15038:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xcd/0x100 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
__cache_free mm/slab.c:3445 [inline]
kfree+0x106/0x2c0 mm/slab.c:3803
___cfg80211_scan_done+0x474/0x960 net/wireless/scan.c:984
__cfg80211_scan_done+0x2c/0x40 net/wireless/scan.c:1001
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xa4/0xd0 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3029 [inline]
call_rcu+0xb1/0x750 kernel/rcu/tree.c:3109
fib6_info_release include/net/ip6_fib.h:337 [inline]
fib6_info_release include/net/ip6_fib.h:334 [inline]
ip6_route_add+0x12d/0x150 net/ipv6/route.c:3861
addrconf_prefix_route+0x30a/0x4e0 net/ipv6/addrconf.c:2415
sit_add_v4_addrs net/ipv6/addrconf.c:3137 [inline]
addrconf_sit_config net/ipv6/addrconf.c:3387 [inline]
addrconf_notify+0x1a96/0x2400 net/ipv6/addrconf.c:3580
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
call_netdevice_notifiers_extack net/core/dev.c:2135 [inline]
call_netdevice_notifiers net/core/dev.c:2149 [inline]
__dev_notify_flags+0x110/0x2b0 net/core/dev.c:8860
rtnl_configure_link+0x16b/0x240 net/core/rtnetlink.c:3143
__rtnl_newlink+0x109f/0x1760 net/core/rtnetlink.c:3468
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3508
rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5574
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:723
____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
___sys_sendmsg+0xf3/0x170 net/socket.c:2446
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff888015599200
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 44 bytes inside of
256-byte region [ffff888015599200, ffff888015599300)
The buggy address belongs to the page:
page:ffffea0000556640 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15599
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0001e52008 ffffea0002046008 ffff888010840500
raw: 0000000000000000 ffff888015599000 0000000100000008 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 13813, ts 1677185189740, free_ts 1675053513618
prep_new_page mm/page_alloc.c:2436 [inline]
get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4169
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5391
__alloc_pages_node include/linux/gfp.h:570 [inline]
kmem_getpages mm/slab.c:1377 [inline]
cache_grow_begin+0x75/0x460 mm/slab.c:2593
cache_alloc_refill+0x27f/0x380 mm/slab.c:2965
____cache_alloc mm/slab.c:3048 [inline]
____cache_alloc mm/slab.c:3031 [inline]
__do_cache_alloc mm/slab.c:3275 [inline]
slab_alloc mm/slab.c:3316 [inline]
kmem_cache_alloc_trace+0x38c/0x480 mm/slab.c:3573
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
fib6_info_alloc+0xc1/0x210 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x33e/0x1aa0 net/ipv6/route.c:3762
ip6_route_add+0x24/0x150 net/ipv6/route.c:3856
addrconf_prefix_route+0x30a/0x4e0 net/ipv6/addrconf.c:2415
sit_add_v4_addrs net/ipv6/addrconf.c:3137 [inline]
addrconf_sit_config net/ipv6/addrconf.c:3387 [inline]
addrconf_notify+0x1a96/0x2400 net/ipv6/addrconf.c:3580
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123
call_netdevice_notifiers_extack net/core/dev.c:2135 [inline]
call_netdevice_notifiers net/core/dev.c:2149 [inline]
__dev_notify_flags+0x110/0x2b0 net/core/dev.c:8860
rtnl_configure_link+0x16b/0x240 net/core/rtnetlink.c:3143
__rtnl_newlink+0x109f/0x1760 net/core/rtnetlink.c:3468
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3508
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1346 [inline]
free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1397
free_unref_page_prepare mm/page_alloc.c:3332 [inline]
free_unref_page_list+0x1a1/0x1050 mm/page_alloc.c:3448
release_pages+0x824/0x20b0 mm/swap.c:972
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
tlb_flush_mmu mm/mmu_gather.c:249 [inline]
tlb_finish_mmu+0x165/0x8c0 mm/mmu_gather.c:340
exit_mmap+0x1ea/0x620 mm/mmap.c:3203
__mmput+0x122/0x470 kernel/fork.c:1101
mmput+0x58/0x60 kernel/fork.c:1122
exit_mm kernel/exit.c:501 [inline]
do_exit+0xae2/0x2a60 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2808
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
Memory state around the buggy address:
ffff888015599100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888015599180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888015599200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888015599280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888015599300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
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Hillf Danton
Jul 30, 2021, 8:43:11 AM7/30/21
to syzbot, joha...@sipsolutions.net, linux-...@vger.kernel.org, linux-w...@vger.kernel.org, net...@vger.kernel.org, syzkall...@googlegroups.com
On Fri, 30 Jul 2021 02:52:20 -0700
Given ieee80211_rx_list() in ieee80211_rx_napi() is protected using rcu,
fix it by s/kfree/kfree_rcu/
+++ x/net/wireless/scan.c
@@ -981,7 +981,7 @@ void ___cfg80211_scan_done(struct cfg802
kfree(rdev->int_scan_req);
rdev->int_scan_req = NULL;
- kfree(rdev->scan_req);
+ kfree_rcu(rdev->scan_req, rcu);
rdev->scan_req = NULL;
if (!send_message)
fix it by s/kfree/kfree_rcu/
+++ x/net/wireless/scan.c
@@ -981,7 +981,7 @@ void ___cfg80211_scan_done(struct cfg802
kfree(rdev->int_scan_req);
rdev->int_scan_req = NULL;
- kfree(rdev->scan_req);
+ kfree_rcu(rdev->scan_req, rcu);
rdev->scan_req = NULL;
if (!send_message)
syzbot
Jan 24, 2022, 6:00:15 PM1/24/22
to syzkall...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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