loop3: detected capacity change from 0 to 1
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 274 Comm: syz-executor.0 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:destroy_workqueue+0x5a2/0xa00
Code: 3f 0f 87 24 01 00 00 e8 0c 58 31 00 89 de 48 89 ef e8 52 6b fe ff 49 89 c7 48 85 c0 74 41 e8 f5 57 31 00 4c 89 fa 48 c1 ea 03 <42> 80 3c 22 00 0f 85 89 03 00 00 49 8b 3f e8 bb 50 7b 03 4c 89 ff
RSP: 0018:ffff88800afe7cb8 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8140fc07
RDX: 0000000000000000 RSI: ffffffff81428f8b RDI: 0000000000000005
RBP: ffff8880170e5800 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffffff85852560 R14: ffffed1002e1cb39 R15: 0000000000000001
FS: 0000555565e37400(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f794ccf91f0 CR3: 0000000036d35000 CR4: 0000000000350ef0
Call Trace:
ext4_put_super+0x106/0xf30
generic_shutdown_super+0x15a/0x4a0
kill_block_super+0x3b/0x90
ext4_kill_sb+0x6c/0xb0
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: 0033:0x7f7719a11f87
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:00007fffc96b7678 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f7719a11f87
RDX: 00007fffc96b7749 RSI: 000000000000000a RDI: 00007fffc96b7740
RBP: 00007fffc96b7740 R08: 00000000ffffffff R09: 00007fffc96b7510
R10: 0000555565e38c7b R11: 0000000000000246 R12: 00007f7719a6a105
R13: 00007fffc96b8800 R14: 0000555565e38c20 R15: 00007fffc96b8840
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:destroy_workqueue+0x5a2/0xa00
Code: 3f 0f 87 24 01 00 00 e8 0c 58 31 00 89 de 48 89 ef e8 52 6b fe ff 49 89 c7 48 85 c0 74 41 e8 f5 57 31 00 4c 89 fa 48 c1 ea 03 <42> 80 3c 22 00 0f 85 89 03 00 00 49 8b 3f e8 bb 50 7b 03 4c 89 ff
RSP: 0018:ffff88800afe7cb8 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8140fc07
RDX: 0000000000000000 RSI: ffffffff81428f8b RDI: 0000000000000005
RBP: ffff8880170e5800 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffffff85852560 R14: ffffed1002e1cb39 R15: 0000000000000001
FS: 0000555565e37400(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f794ccf91f0 CR3: 0000000036d35000 CR4: 0000000000350ef0
BUG: sleeping function called from invalid context at ./include/linux/percpu-rwsem.h:51
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 274, name: syz-executor.0
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
INFO: lockdep is turned off.
CPU: 0 UID: 0 PID: 274 Comm: syz-executor.0 Tainted: G D W 6.17.0-rc3-next-20250829 #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: 0033:0x7f7719a11f87
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:00007fffc96b7678 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f7719a11f87
RDX: 00007fffc96b7749 RSI: 000000000000000a RDI: 00007fffc96b7740
RBP: 00007fffc96b7740 R08: 00000000ffffffff R09: 00007fffc96b7510
R10: 0000555565e38c7b R11: 0000000000000246 R12: 00007f7719a6a105
R13: 00007fffc96b8800 R14: 0000555565e38c20 R15: 00007fffc96b8840
------------[ 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#0: syz-executor.0/274
Modules linked in:
CPU: 0 UID: 0 PID: 274 Comm: syz-executor.0 Tainted: G D W 6.17.0-rc3-next-20250829 #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 8c 27 06 e8 84 11 fd ff e9 1a f8 ff ff c6 05 9a 42 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:ffff88800afe79f0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff88806ce37d00 RCX: ffffffff8139de70
RDX: ffff888016321b80 RSI: ffffffff8139de7e RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d9c4801
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888016321b80
R13: 0000000000000000 R14: ffff888016321b80 R15: ffff8880164bde80
FS: 0000000000000000(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc51266e4a1 CR3: 00000000446da000 CR4: 0000000000350ef0
Call Trace:
__schedule+0x217/0x3590
schedule+0xdb/0x390
synchronize_rcu_expedited+0x353/0x420
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: 0033:0x7f7719a11f87
Code: Unable to access opcode bytes at 0x7f7719a11f5d.
RSP: 002b:00007fffc96b7678 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f7719a11f87
RDX: 00007fffc96b7749 RSI: 000000000000000a RDI: 00007fffc96b7740
RBP: 00007fffc96b7740 R08: 00000000ffffffff R09: 00007fffc96b7510
R10: 0000555565e38c7b R11: 0000000000000246 R12: 00007f7719a6a105
R13: 00007fffc96b8800 R14: 0000555565e38c20 R15: 00007fffc96b8840
irq event stamp: 184075
hardirqs last enabled at (184075): [] cond_local_irq_enable.isra.0+0x2e/0x40
hardirqs last disabled at (184074): [] exc_general_protection+0x32/0x330
softirqs last enabled at (183792): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (183733): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 0f 87 24 01 00 00 ja 0x12a
6: e8 0c 58 31 00 callq 0x315817
b: 89 de mov %ebx,%esi
d: 48 89 ef mov %rbp,%rdi
10: e8 52 6b fe ff callq 0xfffe6b67
15: 49 89 c7 mov %rax,%r15
18: 48 85 c0 test %rax,%rax
1b: 74 41 je 0x5e
1d: e8 f5 57 31 00 callq 0x315817
22: 4c 89 fa mov %r15,%rdx
25: 48 c1 ea 03 shr $0x3,%rdx
* 29: 42 80 3c 22 00 cmpb $0x0,(%rdx,%r12,1) <-- trapping instruction
2e: 0f 85 89 03 00 00 jne 0x3bd
34: 49 8b 3f mov (%r15),%rdi
37: e8 bb 50 7b 03 callq 0x37b50f7
3c: 4c 89 ff mov %r15,%rdi