Oops: general protection fault, probably for non-canonical address 0xdffffc0020000032: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000100000190-0x0000000100000197]
CPU: 0 UID: 0 PID: 3928 Comm: systemd-udevd Tainted: G W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff888047fcf6c0 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff8880171a9b80 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888047fcf930 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007fc744d9a8c0(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 0000000043118000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_contention_end+0x235/0x3e0
trace_contention_end+0xae/0x110
__mutex_lock+0x166/0x1020
ep_send_events+0xff/0xaa0
do_epoll_wait+0x42e/0xee0
__x64_sys_epoll_wait+0x15b/0x280
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7452590d6
Code: 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 e8 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 18 48 89 74 24
RSP: 002b:00007ffc5874a198 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 000055cb7ab7f5d0 RCX: 00007fc7452590d6
RDX: 0000000000000002 RSI: 000055cb7ab953f0 RDI: 0000000000000003
RBP: ffffffffffffffff R08: 0000000000000002 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000002 R14: 000055cb708612e6 R15: 0000000000000000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff888047fcf6c0 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff8880171a9b80 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888047fcf930 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007fc744d9a8c0(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 0000000043118000 CR4: 0000000000350ef0
note: systemd-udevd[3928] exited with preempt_count 2
Oops: general protection fault, probably for non-canonical address 0xdffffc0020000032: 0000 [#2] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000100000190-0x0000000100000197]
CPU: 0 UID: 0 PID: 3962 Comm: syz-executor.1 Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff8880478671c0 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: ffffc900009e6000
RDX: 0000000000040000 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888047867430 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007f919e2ec700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 000000001f9be000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_contention_end+0x235/0x3e0
trace_contention_end+0xae/0x110
__mutex_lock+0x166/0x1020
ext4_orphan_del+0x21f/0xe20
ext4_file_write_iter+0x1497/0x1990
iter_file_splice_write+0xa3b/0x11f0
direct_splice_actor+0x192/0x7b0
splice_direct_to_actor+0x347/0x9d0
do_splice_direct+0x179/0x250
do_sendfile+0xa8e/0xdc0
__x64_sys_sendfile64+0x1d3/0x210
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f91a0d97b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f919e2ec188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f91a0eab020 RCX: 00007f91a0d97b19
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f91a0df1f6d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff2a3ad10f R14: 00007f919e2ec300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff888047fcf6c0 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff8880171a9b80 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888047fcf930 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007f919e2ec700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 000000001f9be000 CR4: 0000000000350ef0
note: syz-executor.1[3962] exited with preempt_count 2
Oops: general protection fault, probably for non-canonical address 0xdffffc0020000032: 0000 [#3] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000100000190-0x0000000100000197]
CPU: 0 UID: 0 PID: 3824 Comm: systemd-udevd Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff888046b27840 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff88801785b700 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888046b27ab0 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007fc744d9a8c0(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 00000000456a1000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_contention_end+0x235/0x3e0
trace_contention_end+0xae/0x110
__mutex_lock+0x166/0x1020
bdev_release+0x155/0x6f0
blkdev_release+0x15/0x20
__fput+0x401/0xb50
fput_close_sync+0x10f/0x240
__x64_sys_close+0x8f/0x120
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7453330f3
Code: 8b 15 d9 9e 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
RSP: 002b:00007ffc5874a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007fc744d9a6c0 RCX: 00007fc7453330f3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000007 R08: 000055cb7084e3e0 R09: 0000000000000000
R10: 00007fc744d9a6c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000809 R15: 00007ffc5874a140
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff888047fcf6c0 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff8880171a9b80 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888047fcf930 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007fc744d9a8c0(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 00000000456a1000 CR4: 0000000000350ef0
note: systemd-udevd[3824] exited with preempt_count 2
Oops: general protection fault, probably for non-canonical address 0xdffffc0020000032: 0000 [#4] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000100000190-0x0000000100000197]
CPU: 0 UID: 0 PID: 330 Comm: kworker/u9:4 Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff8880458df700 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff888016c5b700 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff8880458df970 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 00000000456a1000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_contention_end+0x235/0x3e0
trace_contention_end+0xae/0x110
__mutex_lock+0x166/0x1020
cfg80211_wiphy_work+0x7e/0x480
process_one_work+0x8e1/0x19c0
worker_thread+0x67e/0xe90
kthread+0x3c8/0x740
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff888047fcf6c0 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff8880171a9b80 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888047fcf930 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 00000000456a1000 CR4: 0000000000350ef0
note: kworker/u9:4[330] exited with preempt_count 2
Oops: general protection fault, probably for non-canonical address 0xdffffc0020000032: 0000 [#5] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000100000190-0x0000000100000197]
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: mld mld_dad_work
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff8880095e7700 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff8880095d8000 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff8880095e7970 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 00000000456a1000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_contention_end+0x235/0x3e0
trace_contention_end+0xae/0x110
__mutex_lock+0x166/0x1020
mld_dad_work+0x2a/0x1e0
process_one_work+0x8e1/0x19c0
worker_thread+0x67e/0xe90
kthread+0x3c8/0x740
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff888047fcf6c0 EFLAGS: 00010212
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff8880171a9b80 RSI: ffffffff8189a4e7 RDI: 0000000100000190
RBP: ffff888047fcf930 R08: ffff88806ce31340 R09: ffffe8ffffc16968
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 000000000000001c R14: ffff88806ce31340 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2545512020 CR3: 00000000456a1000 CR4: 0000000000350ef0
note: kworker/0:0[9] exited with preempt_count 2
==================================================================
BUG: KASAN: slab-use-after-free in rwsem_down_write_slowpath+0x129d/0x1380
Read of size 4 at addr ffff888046078034 by task syz-executor.1/280
CPU: 0 UID: 0 PID: 280 Comm: syz-executor.1 Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
print_report+0xcb/0x610
kasan_report+0xca/0x100
rwsem_down_write_slowpath+0x129d/0x1380
down_write+0x1c2/0x1f0
vfs_unlink+0xd9/0x9d0
do_unlinkat+0x4ad/0x670
__x64_sys_unlink+0xc7/0x110
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f91a0d97457
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff2a3ac258 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f91a0d97457
RDX: 00007fff2a3ac290 RSI: 00007fff2a3ac290 RDI: 00007fff2a3ac320
RBP: 00007fff2a3ac320 R08: 0000000000000001 R09: 00007fff2a3ac0f0
R10: 000055555eeefc7b R11: 0000000000000206 R12: 00007f91a0df1105
R13: 00007fff2a3ad3e0 R14: 000055555eeefc20 R15: 00007fff2a3ad420
Allocated by task 3939:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc_node_noprof+0x21a/0x690
copy_process+0x461/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone+0xce/0x120
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 255:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
__kasan_save_free_info+0x3a/0x60
__kasan_slab_free+0x3f/0x50
kmem_cache_free+0x2a1/0x540
rcu_core+0x7c8/0x1800
handle_softirqs+0x1b1/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x39/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
Last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__call_rcu_common.constprop.0+0x70/0x960
delayed_put_task_struct+0xde/0x260
rcu_core+0x7c8/0x1800
handle_softirqs+0x1b1/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x39/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
Second to last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__call_rcu_common.constprop.0+0x70/0x960
put_task_struct_rcu_user+0x75/0xc0
__schedule+0xe86/0x3590
schedule+0xdb/0x390
worker_thread+0x156/0xe90
kthread+0x3c8/0x740
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
The buggy address belongs to the object at ffff888046078000
which belongs to the cache task_struct of size 6784
The buggy address is located 52 bytes inside of
freed 6784-byte region [ffff888046078000, ffff888046079a80)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x46078
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88800bc49a81
flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff888008ff7640 ffffea0001165800 dead000000000002
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88800bc49a81
head: 0100000000000040 ffff888008ff7640 ffffea0001165800 dead000000000002
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88800bc49a81
head: 0100000000000003 ffffea0001181e01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888046077f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888046077f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888046078000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888046078080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888046078100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: df 48 89 fisttps -0x77(%rax)
3: 85 a8 fd ff ff 48 test %ebp,0x48fffffd(%rax)
9: c1 e8 03 shr $0x3,%eax
c: 4c 01 e0 add %r12,%rax
f: 48 89 85 c8 fd ff ff mov %rax,-0x238(%rbp)
16: e8 c9 51 ea ff callq 0xffea51e4
1b: 48 8d bb f0 01 00 00 lea 0x1f0(%rbx),%rdi
22: 48 89 f8 mov %rdi,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e c5 0b 00 00 jle 0xbff
3a: 44 rex.R
3b: 8b .byte 0x8b
3c: ab stos %eax,%es:(%rdi)
3d: f0 lock
3e: 01 .byte 0x1