Oops: general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf]
CPU: 0 UID: 0 PID: 5182 Comm: syz-executor.5 Not tainted 6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:put_pid_ns+0x30/0x80
Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8
RSP: 0018:ffff88804ec7fdb0 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000ba7e000
RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba
RBP: ffffffffffffffea R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664e957 R11: 0000000000000001 R12: ffff88800f4a1c70
R13: ffff88800f4a1e24 R14: ffffffff85cfdf20 R15: ffff88804e593ff8
FS: 00007efd5b329700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd1e13a018 CR3: 000000000ef67000 CR4: 0000000000350ef0
Call Trace:
nsproxy_free+0xfa/0x5a0
create_new_namespaces+0x585/0x750
unshare_nsproxy_namespaces+0xc0/0x200
ksys_unshare+0x468/0xa10
__x64_sys_unshare+0x31/0x40
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efd5ddb3b19
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:00007efd5b329188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007efd5dec6f60 RCX: 00007efd5ddb3b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002c020600
RBP: 00007efd5de0df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe45b8bdbf R14: 00007efd5b329300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:put_pid_ns+0x30/0x80
Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8
RSP: 0018:ffff88804ec7fdb0 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000ba7e000
RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba
RBP: ffffffffffffffea R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664e957 R11: 0000000000000001 R12: ffff88800f4a1c70
R13: ffff88800f4a1e24 R14: ffffffff85cfdf20 R15: ffff88804e593ff8
FS: 00007efd5b329700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd1e13a018 CR3: 000000000ef67000 CR4: 0000000000350ef0
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 5190 Comm: syz-executor.1 Tainted: G D 6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x690
dup_fd+0x4d/0xa80
copy_process+0x21c4/0x72a0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efd1e026b19
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:00007efd1b59c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007efd1e139f60 RCX: 00007efd1e026b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007efd1b59c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffc6f7ac88f R14: 00007efd1b59c300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 5195 Comm: syz-executor.3 Tainted: G D 6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
__kmalloc_noprof+0xcd/0x680
__register_sysctl_table+0xd4f/0x16a0
setup_userns_sysctls+0xcb/0x190
create_user_ns+0x8f7/0xd40
copy_creds+0x4a7/0xa30
copy_process+0xf59/0x72a0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f27a505bb19
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:00007f27a25d1188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f27a516ef60 RCX: 00007f27a505bb19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007f27a25d11d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffdd5ab7a2f R14: 00007f27a25d1300 R15: 0000000000022000
sysctl could not get directory: /user -12
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 5205 Comm: syz-executor.1 Tainted: G D 6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x690
dup_fd+0x4d/0xa80
copy_process+0x21c4/0x72a0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efd1e026b19
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:00007efd1b59c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007efd1e139f60 RCX: 00007efd1e026b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007efd1b59c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffc6f7ac88f R14: 00007efd1b59c300 R15: 0000000000022000
tmpfs: Unknown parameter './file0/file0'
----------------
Code disassembly (best guess):
0: 89 fd mov %edi,%ebp
2: 53 push %rbx
3: e8 42 a0 03 00 callq 0x3a04a
8: 48 85 ed test %rbp,%rbp
b: 74 3d je 0x4a
d: e8 38 a0 03 00 callq 0x3a04a
12: 48 8d bd d0 00 00 00 lea 0xd0(%rbp),%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: 75 35 jne 0x65
30: 48 8b 9d d0 00 00 00 mov 0xd0(%rbp),%rbx
37: bf 08 00 00 00 mov $0x8,%edi
3c: 48 89 de mov %rbx,%rsi
3f: e8 .byte 0xe8