[v6.6] KASAN: slab-use-after-free Read in l2cap_sock_ready_cb
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syzbot
2:39 AM (4 hours ago) 2:39 AM
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Hello,
syzbot found the following issue on:
HEAD commit: c5596480c50e Linux 6.6.145
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=104ab746580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f0bc3d90c30838b5
dashboard link: https://syzkaller.appspot.com/bug?extid=2f58f221d0176ad8d867
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/eb5cda0a8020/disk-c5596480.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ca05ff2fc502/vmlinux-c5596480.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6daf3255b985/bzImage-c5596480.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2f58f2...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in l2cap_sock_ready_cb+0xd7/0x140 net/bluetooth/l2cap_sock.c:1744
Read of size 8 at addr ffff88805eaa94a8 by task kworker/u5:1/5087
CPU: 0 PID: 5087 Comm: kworker/u5:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: hci3 hci_rx_work
Call Trace:
<TASK>
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xa8/0x210 mm/kasan/report.c:468
kasan_report+0x117/0x150 mm/kasan/report.c:581
l2cap_sock_ready_cb+0xd7/0x140 net/bluetooth/l2cap_sock.c:1744
l2cap_chan_ready net/bluetooth/l2cap_core.c:1296 [inline]
l2cap_le_start+0xaae/0x1350 net/bluetooth/l2cap_core.c:1408
l2cap_conn_ready net/bluetooth/l2cap_core.c:1661 [inline]
l2cap_connect_cfm+0x728/0x1160 net/bluetooth/l2cap_core.c:7493
hci_connect_cfm+0x8f/0x130 include/net/bluetooth/hci_core.h:2004
le_conn_complete_evt+0xf1d/0x1480 net/bluetooth/hci_event.c:5794
hci_le_conn_complete_evt+0x187/0x440 net/bluetooth/hci_event.c:5820
hci_event_func net/bluetooth/hci_event.c:7492 [inline]
hci_event_packet+0x7b4/0x1280 net/bluetooth/hci_event.c:7547
hci_rx_work+0x43a/0xd60 net/bluetooth/hci_core.c:4017
process_one_work kernel/workqueue.c:2653 [inline]
process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2730
worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2811
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Allocated by task 12318:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
____kasan_kmalloc mm/kasan/common.c:375 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1007 [inline]
__kmalloc+0xb7/0x240 mm/slab_common.c:1020
kmalloc include/linux/slab.h:604 [inline]
sk_prot_alloc+0xe7/0x210 net/core/sock.c:2101
sk_alloc+0x3a/0x350 net/core/sock.c:2157
bt_sock_alloc+0x3b/0x330 net/bluetooth/af_bluetooth.c:148
l2cap_sock_alloc net/bluetooth/l2cap_sock.c:1936 [inline]
l2cap_sock_create+0x15a/0x2d0 net/bluetooth/l2cap_sock.c:1974
bt_sock_create+0x159/0x230 net/bluetooth/af_bluetooth.c:132
__sock_create+0x49e/0x940 net/socket.c:1571
sock_create net/socket.c:1627 [inline]
__sys_socket_create net/socket.c:1664 [inline]
__sys_socket+0xd7/0x1b0 net/socket.c:1715
__do_sys_socket net/socket.c:1729 [inline]
__se_sys_socket net/socket.c:1727 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1727
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 12317:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1f0 mm/slub.c:3843
sk_prot_free net/core/sock.c:2140 [inline]
__sk_destruct+0x4e0/0x660 net/core/sock.c:2235
l2cap_sock_release+0x16d/0x1e0 net/bluetooth/l2cap_sock.c:1448
__sock_release net/socket.c:659 [inline]
sock_close+0xa7/0x210 net/socket.c:1421
__fput+0x221/0x940 fs/file_table.c:418
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2721 [inline]
call_rcu+0x153/0x900 kernel/rcu/tree.c:2837
netlink_release+0x167e/0x1a70 net/netlink/af_netlink.c:801
__sock_release net/socket.c:659 [inline]
sock_close+0xa7/0x210 net/socket.c:1421
__fput+0x221/0x940 fs/file_table.c:418
task_work_run+0x1d4/0x260 kernel/task_work.c:245
get_signal+0x11da/0x1390 kernel/signal.c:2679
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Second to last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2721 [inline]
call_rcu+0x153/0x900 kernel/rcu/tree.c:2837
netlink_release+0x167e/0x1a70 net/netlink/af_netlink.c:801
__sock_release net/socket.c:659 [inline]
sock_close+0xa7/0x210 net/socket.c:1421
__fput+0x221/0x940 fs/file_table.c:418
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
The buggy address belongs to the object at ffff88805eaa9000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1192 bytes inside of
freed 2048-byte region [ffff88805eaa9000, ffff88805eaa9800)
The buggy address belongs to the physical page:
page:ffffea00017aaa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5eaa8
head:ffffea00017aaa00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888017c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080080008 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 5782, tgid 5782 (syz-executor), ts 80891092206, free_ts 26593189369
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582
prep_new_page mm/page_alloc.c:1589 [inline]
get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
alloc_slab_page+0x5d/0x180 mm/slub.c:1881
allocate_slab mm/slub.c:2028 [inline]
new_slab+0x87/0x2d0 mm/slub.c:2081
___slab_alloc+0xc5c/0x12f0 mm/slub.c:3253
__slab_alloc mm/slub.c:3339 [inline]
__slab_alloc_node mm/slub.c:3392 [inline]
slab_alloc_node mm/slub.c:3485 [inline]
__kmem_cache_alloc_node+0x11f/0x250 mm/slub.c:3534
kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:721 [inline]
nbp_vlan_add+0x20f/0x3c0 net/bridge/br_vlan.c:1335
nbp_vlan_init+0x376/0x460 net/bridge/br_vlan.c:1280
br_add_if+0xacc/0xee0 net/bridge/br_if.c:680
do_set_master net/core/rtnetlink.c:2718 [inline]
do_setlink+0xcde/0x3f40 net/core/rtnetlink.c:2924
__rtnl_newlink net/core/rtnetlink.c:3715 [inline]
rtnl_newlink+0x1848/0x2170 net/core/rtnetlink.c:3762
rtnetlink_rcv_msg+0x843/0xf90 net/core/rtnetlink.c:6484
netlink_rcv_skb+0x235/0x4c0 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x7b1/0x930 net/netlink/af_netlink.c:1346
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1182 [inline]
free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
free_contig_range+0xa1/0x150 mm/page_alloc.c:6421
destroy_args+0x7d/0x840 mm/debug_vm_pgtable.c:1015
debug_vm_pgtable+0x411/0x440 mm/debug_vm_pgtable.c:1400
do_one_initcall+0x242/0x790 init/main.c:1249
do_initcall_level+0x13d/0x1f0 init/main.c:1311
do_initcalls+0x69/0xd0 init/main.c:1327
kernel_init_freeable+0x3d9/0x560 init/main.c:1564
kernel_init+0x1d/0x1c0 init/main.c:1454
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Memory state around the buggy address:
ffff88805eaa9380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805eaa9400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805eaa9480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805eaa9500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805eaa9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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If the report is already addressed, let syzbot know by replying with:
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If you want to undo deduplication, reply with:
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syzbot found the following issue on:
HEAD commit: c5596480c50e Linux 6.6.145
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=104ab746580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f0bc3d90c30838b5
dashboard link: https://syzkaller.appspot.com/bug?extid=2f58f221d0176ad8d867
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/eb5cda0a8020/disk-c5596480.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ca05ff2fc502/vmlinux-c5596480.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6daf3255b985/bzImage-c5596480.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2f58f2...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in l2cap_sock_ready_cb+0xd7/0x140 net/bluetooth/l2cap_sock.c:1744
Read of size 8 at addr ffff88805eaa94a8 by task kworker/u5:1/5087
CPU: 0 PID: 5087 Comm: kworker/u5:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: hci3 hci_rx_work
Call Trace:
<TASK>
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xa8/0x210 mm/kasan/report.c:468
kasan_report+0x117/0x150 mm/kasan/report.c:581
l2cap_sock_ready_cb+0xd7/0x140 net/bluetooth/l2cap_sock.c:1744
l2cap_chan_ready net/bluetooth/l2cap_core.c:1296 [inline]
l2cap_le_start+0xaae/0x1350 net/bluetooth/l2cap_core.c:1408
l2cap_conn_ready net/bluetooth/l2cap_core.c:1661 [inline]
l2cap_connect_cfm+0x728/0x1160 net/bluetooth/l2cap_core.c:7493
hci_connect_cfm+0x8f/0x130 include/net/bluetooth/hci_core.h:2004
le_conn_complete_evt+0xf1d/0x1480 net/bluetooth/hci_event.c:5794
hci_le_conn_complete_evt+0x187/0x440 net/bluetooth/hci_event.c:5820
hci_event_func net/bluetooth/hci_event.c:7492 [inline]
hci_event_packet+0x7b4/0x1280 net/bluetooth/hci_event.c:7547
hci_rx_work+0x43a/0xd60 net/bluetooth/hci_core.c:4017
process_one_work kernel/workqueue.c:2653 [inline]
process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2730
worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2811
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Allocated by task 12318:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
____kasan_kmalloc mm/kasan/common.c:375 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1007 [inline]
__kmalloc+0xb7/0x240 mm/slab_common.c:1020
kmalloc include/linux/slab.h:604 [inline]
sk_prot_alloc+0xe7/0x210 net/core/sock.c:2101
sk_alloc+0x3a/0x350 net/core/sock.c:2157
bt_sock_alloc+0x3b/0x330 net/bluetooth/af_bluetooth.c:148
l2cap_sock_alloc net/bluetooth/l2cap_sock.c:1936 [inline]
l2cap_sock_create+0x15a/0x2d0 net/bluetooth/l2cap_sock.c:1974
bt_sock_create+0x159/0x230 net/bluetooth/af_bluetooth.c:132
__sock_create+0x49e/0x940 net/socket.c:1571
sock_create net/socket.c:1627 [inline]
__sys_socket_create net/socket.c:1664 [inline]
__sys_socket+0xd7/0x1b0 net/socket.c:1715
__do_sys_socket net/socket.c:1729 [inline]
__se_sys_socket net/socket.c:1727 [inline]
__x64_sys_socket+0x7a/0x90 net/socket.c:1727
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 12317:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1f0 mm/slub.c:3843
sk_prot_free net/core/sock.c:2140 [inline]
__sk_destruct+0x4e0/0x660 net/core/sock.c:2235
l2cap_sock_release+0x16d/0x1e0 net/bluetooth/l2cap_sock.c:1448
__sock_release net/socket.c:659 [inline]
sock_close+0xa7/0x210 net/socket.c:1421
__fput+0x221/0x940 fs/file_table.c:418
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2721 [inline]
call_rcu+0x153/0x900 kernel/rcu/tree.c:2837
netlink_release+0x167e/0x1a70 net/netlink/af_netlink.c:801
__sock_release net/socket.c:659 [inline]
sock_close+0xa7/0x210 net/socket.c:1421
__fput+0x221/0x940 fs/file_table.c:418
task_work_run+0x1d4/0x260 kernel/task_work.c:245
get_signal+0x11da/0x1390 kernel/signal.c:2679
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Second to last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2721 [inline]
call_rcu+0x153/0x900 kernel/rcu/tree.c:2837
netlink_release+0x167e/0x1a70 net/netlink/af_netlink.c:801
__sock_release net/socket.c:659 [inline]
sock_close+0xa7/0x210 net/socket.c:1421
__fput+0x221/0x940 fs/file_table.c:418
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
The buggy address belongs to the object at ffff88805eaa9000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1192 bytes inside of
freed 2048-byte region [ffff88805eaa9000, ffff88805eaa9800)
The buggy address belongs to the physical page:
page:ffffea00017aaa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5eaa8
head:ffffea00017aaa00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888017c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080080008 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 5782, tgid 5782 (syz-executor), ts 80891092206, free_ts 26593189369
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582
prep_new_page mm/page_alloc.c:1589 [inline]
get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501
alloc_slab_page+0x5d/0x180 mm/slub.c:1881
allocate_slab mm/slub.c:2028 [inline]
new_slab+0x87/0x2d0 mm/slub.c:2081
___slab_alloc+0xc5c/0x12f0 mm/slub.c:3253
__slab_alloc mm/slub.c:3339 [inline]
__slab_alloc_node mm/slub.c:3392 [inline]
slab_alloc_node mm/slub.c:3485 [inline]
__kmem_cache_alloc_node+0x11f/0x250 mm/slub.c:3534
kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:721 [inline]
nbp_vlan_add+0x20f/0x3c0 net/bridge/br_vlan.c:1335
nbp_vlan_init+0x376/0x460 net/bridge/br_vlan.c:1280
br_add_if+0xacc/0xee0 net/bridge/br_if.c:680
do_set_master net/core/rtnetlink.c:2718 [inline]
do_setlink+0xcde/0x3f40 net/core/rtnetlink.c:2924
__rtnl_newlink net/core/rtnetlink.c:3715 [inline]
rtnl_newlink+0x1848/0x2170 net/core/rtnetlink.c:3762
rtnetlink_rcv_msg+0x843/0xf90 net/core/rtnetlink.c:6484
netlink_rcv_skb+0x235/0x4c0 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x7b1/0x930 net/netlink/af_netlink.c:1346
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1182 [inline]
free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
free_contig_range+0xa1/0x150 mm/page_alloc.c:6421
destroy_args+0x7d/0x840 mm/debug_vm_pgtable.c:1015
debug_vm_pgtable+0x411/0x440 mm/debug_vm_pgtable.c:1400
do_one_initcall+0x242/0x790 init/main.c:1249
do_initcall_level+0x13d/0x1f0 init/main.c:1311
do_initcalls+0x69/0xd0 init/main.c:1327
kernel_init_freeable+0x3d9/0x560 init/main.c:1564
kernel_init+0x1d/0x1c0 init/main.c:1454
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Memory state around the buggy address:
ffff88805eaa9380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805eaa9400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805eaa9480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805eaa9500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805eaa9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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