------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.5/286
Modules linked in:
CPU: 1 UID: 0 PID: 286 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:mntput_no_expire+0x78e/0xbe0
Code: 05 d6 30 81 04 01 e8 71 df 91 ff e9 41 fc ff ff e8 27 47 b4 ff 31 ff 44 89 ee e8 4d 42 b4 ff 45 85 ed 79 09 e8 13 47 b4 ff 90 <0f> 0b 90 e8 0a 47 b4 ff e8 b5 2d fc 02 31 ff 89 c5 89 c6 e8 2a 42
RSP: 0018:ffff88801659fc00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11002cb3f85 RCX: ffffffff81bfaf93
RDX: ffff88800f3bd280 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff88801f380e00 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88801659fc68
R13: 00000000ffffffff R14: dead000000000100 R15: ffff88801f380e00
FS: 00005555575bf400(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000677000 CR3: 0000000045495000 CR4: 0000000000350ef0
Call Trace:
namespace_unlock+0x7f1/0x810
path_umount+0x6a4/0x1100
__x64_sys_umount+0x15c/0x190
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f339c39bf87
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:00007ffc24843f48 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007f339c39bf87
RDX: 00007ffc24844019 RSI: 000000000000000a RDI: 00007ffc24844010
RBP: 00007ffc24844010 R08: 00000000ffffffff R09: 00007ffc24843de0
R10: 00005555575c0c7b R11: 0000000000000206 R12: 00007f339c3f4105
R13: 00007ffc248450d0 R14: 00005555575c0c20 R15: 00007ffc24845110
irq event stamp: 164559
hardirqs last enabled at (164569): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (164576): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (164328): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (164323): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'.
------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.5/286
Modules linked in:
CPU: 1 UID: 0 PID: 286 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:mntput_no_expire+0x78e/0xbe0
Code: 05 d6 30 81 04 01 e8 71 df 91 ff e9 41 fc ff ff e8 27 47 b4 ff 31 ff 44 89 ee e8 4d 42 b4 ff 45 85 ed 79 09 e8 13 47 b4 ff 90 <0f> 0b 90 e8 0a 47 b4 ff e8 b5 2d fc 02 31 ff 89 c5 89 c6 e8 2a 42
RSP: 0018:ffff88801659fce0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11002cb3fa1 RCX: ffffffff81bfaf93
RDX: ffff88800f3bd280 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff88801f380e00 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000fffffffe R11: 0000000000000001 R12: ffff88801659fd48
R13: 00000000fffffffe R14: ffff88801f380e00 R15: ffff88801f380ee8
FS: 00005555575bf400(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000681000 CR3: 0000000045495000 CR4: 0000000000350ef0
Call Trace:
path_umount+0x6e0/0x1100
__x64_sys_umount+0x15c/0x190
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f339c39bf87
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:00007ffc24843f48 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007f339c39bf87
RDX: 00007ffc24844019 RSI: 000000000000000a RDI: 00007ffc24844010
RBP: 00007ffc24844010 R08: 00000000ffffffff R09: 00007ffc24843de0
R10: 00005555575c0c7b R11: 0000000000000206 R12: 00007f339c3f4105
R13: 00007ffc248450d0 R14: 00005555575c0c20 R15: 00007ffc24845110
irq event stamp: 165207
hardirqs last enabled at (165215): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (165224): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (165072): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (165067): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
kmemleak: Automatic memory scanning thread ended
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 4036 Comm: syz-executor.1 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_trace_add+0x21b/0x340
Code: 00 0f 85 3a 01 00 00 4c 89 75 00 4d 85 ed 74 2a e8 da b2 f5 ff 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 df 00 00 00 4d 89 75 08 eb 03 45 31 e4 e8 ad b2
RSP: 0018:ffff8880486679c8 EFLAGS: 00010012
RAX: dffffc0000000000 RBX: ffff888009649f40 RCX: ffffffff817e42fe
RDX: 0000000000000001 RSI: ffffffff817e43d6 RDI: 0000000000000009
RBP: ffffe8ffffc162d0 R08: ffffffff85ca4140 R09: ffffed10090ccf80
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffff888009649fa0 R15: ffff888009649fd8
FS: 00007f089bf53700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3772551650 CR3: 000000000cc10000 CR4: 0000000000350ef0
Call Trace:
event_sched_in+0x446/0xb60
merge_sched_in+0xb4d/0x1810
visit_groups_merge.constprop.0.isra.0+0x8d1/0x1150
ctx_sched_in+0x579/0x9b0
perf_event_sched_in+0x5d/0x90
__perf_event_task_sched_in+0x2ec/0x5e0
finish_task_switch.isra.0+0x410/0x840
__schedule+0xe86/0x3590
schedule+0xdb/0x390
exit_to_user_mode_loop+0x69/0x110
do_syscall_64+0x2f7/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f089e9ddb19
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:00007f089bf53218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f089eaf0f68 RCX: 00007f089e9ddb19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f089eaf0f6c
RBP: 00007f089eaf0f60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007f089eaf0f6c
R13: 00007ffda5fbf7cf R14: 00007f089bf53300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_trace_add+0x21b/0x340
Code: 00 0f 85 3a 01 00 00 4c 89 75 00 4d 85 ed 74 2a e8 da b2 f5 ff 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 df 00 00 00 4d 89 75 08 eb 03 45 31 e4 e8 ad b2
RSP: 0018:ffff8880486679c8 EFLAGS: 00010012
RAX: dffffc0000000000 RBX: ffff888009649f40 RCX: ffffffff817e42fe
RDX: 0000000000000001 RSI: ffffffff817e43d6 RDI: 0000000000000009
RBP: ffffe8ffffc162d0 R08: ffffffff85ca4140 R09: ffffed10090ccf80
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: ffff888009649fa0 R15: ffff888009649fd8
FS: 00007f089bf53700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3772551650 CR3: 000000000cc10000 CR4: 0000000000350ef0
note: syz-executor.1[4036] exited with irqs disabled
----------------
Code disassembly (best guess):
0: 00 0f add %cl,(%rdi)
2: 85 3a test %edi,(%rdx)
4: 01 00 add %eax,(%rax)
6: 00 4c 89 75 add %cl,0x75(%rcx,%rcx,4)
a: 00 4d 85 add %cl,-0x7b(%rbp)
d: ed in (%dx),%eax
e: 74 2a je 0x3a
10: e8 da b2 f5 ff callq 0xfff5b2ef
15: 49 8d 7d 08 lea 0x8(%r13),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 df 00 00 00 jne 0x113
34: 4d 89 75 08 mov %r14,0x8(%r13)
38: eb 03 jmp 0x3d
3a: 45 31 e4 xor %r12d,%r12d
3d: e8 .byte 0xe8
3e: ad lods %ds:(%rsi),%eax
3f: b2 .byte 0xb2