do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Oops: general protection fault, probably for non-canonical address 0xdffffc00033545a0: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000019aa2d00-0x0000000019aa2d07]
CPU: 0 UID: 0 PID: 287 Comm: syz-executor.5 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:__queue_work+0x202/0x1240
Code: 48 8b 6d 00 e8 4f ee 79 03 31 ff 41 89 c5 89 c6 e8 c3 02 32 00 45 85 ed 0f 85 e1 05 00 00 e8 85 07 32 00 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 a0 0e 00 00 4c 8b 75 00 48 89 df 4c 89 34 24
RSP: 0018:ffff8880198876b0 EFLAGS: 00010016
RAX: 00000000033545a0 RBX: ffff88801e838018 RCX: ffffffff8141f51d
RDX: ffff8880071c5280 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 0000000019aa2d00 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888015fe2000
FS: 00005555835cf400(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001580 CR3: 0000000043052000 CR4: 0000000000350ef0
Call Trace:
queue_work_on+0xd0/0xe0
loop_queue_rq+0x5c8/0x1180
__blk_mq_issue_directly+0xd5/0x260
blk_mq_request_issue_directly+0x11c/0x1e0
blk_mq_issue_direct+0x192/0x640
blk_mq_dispatch_queue_requests+0x4b0/0x7c0
blk_mq_flush_plug_list+0x1ec/0x5b0
kmemleak: Automatic memory scanning thread ended
__blk_flush_plug+0x25c/0x460
__submit_bio+0x480/0x5b0
submit_bio_noacct_nocheck+0x68e/0xcb0
submit_bio_noacct+0x359/0x1350
__sync_dirty_buffer+0x176/0x380
fat_set_state+0x22f/0x360
fat_put_super+0x3f/0xc0
generic_shutdown_super+0x15a/0x4a0
kill_block_super+0x3b/0x90
deactivate_locked_super+0xbf/0x1a0
deactivate_super+0xb1/0xd0
cleanup_mnt+0x2df/0x430
task_work_run+0x172/0x280
exit_to_user_mode_loop+0xef/0x110
do_syscall_64+0x2f7/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbcce5eff87
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffc862b7828 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 00007fbcce5eff87
RDX: 00007ffc862b78f9 RSI: 000000000000000a RDI: 00007ffc862b78f0
RBP: 00007ffc862b78f0 R08: 00000000ffffffff R09: 00007ffc862b76c0
R10: 00005555835d0c7b R11: 0000000000000246 R12: 00007fbcce648105
R13: 00007ffc862b89b0 R14: 00005555835d0c20 R15: 00007ffc862b89f0
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x202/0x1240
Code: 48 8b 6d 00 e8 4f ee 79 03 31 ff 41 89 c5 89 c6 e8 c3 02 32 00 45 85 ed 0f 85 e1 05 00 00 e8 85 07 32 00 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 a0 0e 00 00 4c 8b 75 00 48 89 df 4c 89 34 24
RSP: 0018:ffff8880198876b0 EFLAGS: 00010016
RAX: 00000000033545a0 RBX: ffff88801e838018 RCX: ffffffff8141f51d
RDX: ffff8880071c5280 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 0000000019aa2d00 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888015fe2000
FS: 00005555835cf400(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001580 CR3: 0000000043052000 CR4: 0000000000350ef0
note: syz-executor.5[287] exited with irqs disabled
note: syz-executor.5[287] exited with preempt_count 1
------------[ cut here ]------------
WARNING: kernel/exit.c:898 at do_exit+0x1c36/0x2970, CPU#0: syz-executor.5/287
Modules linked in:
CPU: 0 UID: 0 PID: 287 Comm: syz-executor.5 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:do_exit+0x1c36/0x2970
Code: 96 0a 00 00 c7 43 18 00 00 00 00 e9 21 e6 ff ff e8 ef b3 38 00 bf 02 24 00 00 e8 f5 ab 0b 00 e9 41 ff ff ff e8 db b3 38 00 90 <0f> 0b 90 e9 87 e4 ff ff e8 cd b3 38 00 4c 89 e6 bf 05 06 00 00 e8
RSP: 0018:ffff888019887e40 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff813b2727
RDX: ffff8880071c5280 RSI: ffffffff813b42d5 RDI: ffff8880071c6468
RBP: ffff8880071c5280 R08: 0000000000000001 R09: fffffbfff0f126d8
R10: 0000000000000200 R11: 0000000000000001 R12: 000000000000000b
R13: 0000000000002710 R14: dffffc00033545a0 R15: 0000000000000000
FS: 00005555835cf400(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001580 CR3: 0000000043052000 CR4: 0000000000350ef0
Call Trace:
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7fbcce5eff87
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffc862b7828 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 00007fbcce5eff87
RDX: 00007ffc862b78f9 RSI: 000000000000000a RDI: 00007ffc862b78f0
RBP: 00007ffc862b78f0 R08: 00000000ffffffff R09: 00007ffc862b76c0
R10: 00005555835d0c7b R11: 0000000000000246 R12: 00007fbcce648105
R13: 00007ffc862b89b0 R14: 00005555835d0c20 R15: 00007ffc862b89f0
irq event stamp: 157540
hardirqs last enabled at (157539): [] ktime_get+0x1c7/0x270
hardirqs last disabled at (157540): [] _raw_spin_lock_irq+0x42/0x50
softirqs last enabled at (157500): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (157455): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
BUG: sleeping function called from invalid context at ./include/linux/percpu-rwsem.h:51
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 287, name: syz-executor.5
preempt_count: 0, expected: 0
RCU nest depth: 2, expected: 0
INFO: lockdep is turned off.
CPU: 0 UID: 0 PID: 287 Comm: syz-executor.5 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+0xfa/0x120
__might_resched+0x2f3/0x510
exit_signals+0x25/0x940
do_exit+0x2db/0x2970
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7fbcce5eff87
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffc862b7828 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 00007fbcce5eff87
RDX: 00007ffc862b78f9 RSI: 000000000000000a RDI: 00007ffc862b78f0
RBP: 00007ffc862b78f0 R08: 00000000ffffffff R09: 00007ffc862b76c0
R10: 00005555835d0c7b R11: 0000000000000246 R12: 00007fbcce648105
R13: 00007ffc862b89b0 R14: 00005555835d0c20 R15: 00007ffc862b89f0
Zero length message leads to an empty skb
BUG: unable to handle page fault for address: ffffffff00000008
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 5a8b067 P4D 5a8b067 PUD 0
Oops: Oops: 0002 [#2] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 287 Comm: syz-executor.5 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:__blk_flush_plug+0x128/0x460
Code: 6c 24 58 49 8b 56 30 80 38 00 0f 85 03 03 00 00 48 8d 7a 08 4d 8b 66 38 48 89 f9 48 c1 e9 03 42 80 3c 39 00 0f 85 02 03 00 00 <48> 89 5a 08 48 89 54 24 58 4c 89 e2 48 c1 ea 03 42 80 3c 3a 00 0f
RSP: 0018:ffff888019887a08 EFLAGS: 00010246
RAX: ffffed1003310f6a RBX: ffff888019887a60 RCX: 1fffffffe0000001
RDX: ffffffff00000000 RSI: ffffffff8238fab7 RDI: ffffffff00000008
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff8643b457 R11: ffff888013f29070 R12: ffff8880071c5280
R13: ffff888019887a60 R14: ffff888019887b18 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff00000008 CR3: 000000000b7fc000 CR4: 0000000000350ef0
Call Trace:
schedule+0x2b9/0x390
exp_funnel_lock+0x450/0x5c0
synchronize_rcu_expedited+0x27e/0x420
namespace_unlock+0x4b6/0x810
put_mnt_ns+0xf5/0x120
free_nsproxy+0x3a/0x400
switch_task_namespaces+0xe2/0x100
do_exit+0x841/0x2970
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7fbcce5eff87
Code: Unable to access opcode bytes at 0x7fbcce5eff5d.
RSP: 002b:00007ffc862b7828 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 00007fbcce5eff87
RDX: 00007ffc862b78f9 RSI: 000000000000000a RDI: 00007ffc862b78f0
RBP: 00007ffc862b78f0 R08: 00000000ffffffff R09: 00007ffc862b76c0
R10: 00005555835d0c7b R11: 0000000000000246 R12: 00007fbcce648105
R13: 00007ffc862b89b0 R14: 00005555835d0c20 R15: 00007ffc862b89f0
Modules linked in:
CR2: ffffffff00000008
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x202/0x1240
Code: 48 8b 6d 00 e8 4f ee 79 03 31 ff 41 89 c5 89 c6 e8 c3 02 32 00 45 85 ed 0f 85 e1 05 00 00 e8 85 07 32 00 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 a0 0e 00 00 4c 8b 75 00 48 89 df 4c 89 34 24
RSP: 0018:ffff8880198876b0 EFLAGS: 00010016
RAX: 00000000033545a0 RBX: ffff88801e838018 RCX: ffffffff8141f51d
RDX: ffff8880071c5280 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 0000000019aa2d00 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888015fe2000
FS: 0000000000000000(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff00000008 CR3: 000000000b7fc000 CR4: 0000000000350ef0
note: syz-executor.5[287] exited with irqs disabled
Fixing recursive fault but reboot is needed!
BUG: scheduling while atomic: syz-executor.5/287/0x00000000
INFO: lockdep is turned off.
Modules linked in:
CPU: 1 UID: 0 PID: 287 Comm: syz-executor.5 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+0xfa/0x120
__schedule_bug+0xb9/0x100
__schedule+0x24f3/0x3590
do_task_dead+0xdc/0x110
make_task_dead+0x373/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7fbcce5eff87
Code: Unable to access opcode bytes at 0x7fbcce5eff5d.
RSP: 002b:00007ffc862b7828 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 00007fbcce5eff87
RDX: 00007ffc862b78f9 RSI: 000000000000000a RDI: 00007ffc862b78f0
RBP: 00007ffc862b78f0 R08: 00000000ffffffff R09: 00007ffc862b76c0
R10: 00005555835d0c7b R11: 0000000000000246 R12: 00007fbcce648105
R13: 00007ffc862b89b0 R14: 00005555835d0c20 R15: 00007ffc862b89f0
------------[ cut here ]------------
Voluntary context switch within RCU read-side critical section!
WARNING: kernel/rcu/tree_plugin.h:332 at rcu_note_context_switch+0xa96/0x1b00, CPU#1: syz-executor.5/287
Modules linked in:
CPU: 1 UID: 0 PID: 287 Comm: syz-executor.5 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:rcu_note_context_switch+0xa96/0x1b00
Code: 00 00 00 65 48 8b 3d 41 dc 27 06 e8 84 11 fd ff e9 1a f8 ff ff c6 05 2e 4a e4 04 01 90 48 c7 c7 a0 8a c9 84 e8 0b 39 dd ff 90 <0f> 0b 90 90 e9 3a f6 ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea
RSP: 0018:ffff888019887d38 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffff88806cf37d00 RCX: ffffffff8139de70
RDX: ffff8880071c5280 RSI: ffffffff8139de7e RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d9e4801
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880071c5280
R13: 0000000000000000 R14: ffff8880071c5280 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff00000008 CR3: 000000000b7fc000 CR4: 0000000000350ef0
Call Trace:
__schedule+0x217/0x3590
do_task_dead+0xdc/0x110
make_task_dead+0x373/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7fbcce5eff87
Code: Unable to access opcode bytes at 0x7fbcce5eff5d.
RSP: 002b:00007ffc862b7828 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000013 RCX: 00007fbcce5eff87
RDX: 00007ffc862b78f9 RSI: 000000000000000a RDI: 00007ffc862b78f0
RBP: 00007ffc862b78f0 R08: 00000000ffffffff R09: 00007ffc862b76c0
R10: 00005555835d0c7b R11: 0000000000000246 R12: 00007fbcce648105
R13: 00007ffc862b89b0 R14: 00005555835d0c20 R15: 00007ffc862b89f0
irq event stamp: 157540
hardirqs last enabled at (157539): [] ktime_get+0x1c7/0x270
hardirqs last disabled at (157540): [] _raw_spin_lock_irq+0x42/0x50
softirqs last enabled at (157500): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (157455): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: 48 8b 6d 00 mov 0x0(%rbp),%rbp
4: e8 4f ee 79 03 callq 0x379ee58
9: 31 ff xor %edi,%edi
b: 41 89 c5 mov %eax,%r13d
e: 89 c6 mov %eax,%esi
10: e8 c3 02 32 00 callq 0x3202d8
15: 45 85 ed test %r13d,%r13d
18: 0f 85 e1 05 00 00 jne 0x5ff
1e: e8 85 07 32 00 callq 0x3207a8
23: 48 89 e8 mov %rbp,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 0f 85 a0 0e 00 00 jne 0xed5
35: 4c 8b 75 00 mov 0x0(%rbp),%r14
39: 48 89 df mov %rbx,%rdi
3c: 4c 89 34 24 mov %r14,(%rsp)