EXT4-fs warning (device loop5): ext4_enable_quotas:7177: Failed to enable quota tracking (type=1, err=-117, ino=4). Please run e2fsck to fix.
EXT4-fs (loop5): mount failed
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: lib/refcount.c:28 at refcount_warn_saturate+0x10d/0x210, CPU#1: syz-executor.4/5164
Modules linked in:
CPU: 1 UID: 0 PID: 5164 Comm: syz-executor.4 Not tainted 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:refcount_warn_saturate+0x10d/0x210
Code: c6 0c 04 31 ff 89 de e8 91 84 1f ff 84 db 75 9f e8 b8 89 1f ff c6 05 fe c5 0c 04 01 90 48 c7 c7 80 07 03 85 e8 b4 b5 e4 fe 90 <0f> 0b 90 90 e9 7c ff ff ff e8 95 89 1f ff 0f b6 1d d9 c5 0c 04 31
RSP: 0018:ffff8880190279e0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000b640000
RDX: 0000000000040000 RSI: ffffffff8139f03e RDI: 0000000000000001
RBP: ffff88800d00682c R08: 0000000000000001 R09: ffffed1003204ef3
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800d006800
R13: ffff88800d00682c R14: ffff88801bbab4d0 R15: ffff88800ac38878
FS: 00007f9343c05700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fc05c8718 CR3: 000000000ef19000 CR4: 0000000000350ef0
Call Trace:
nsproxy_free+0x4d3/0x5a0
create_new_namespaces+0x585/0x750
copy_namespaces+0x45c/0x580
copy_process+0x26e4/0x72a0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f93466d1b19
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:00007f9343c05188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f93467e50e0 RCX: 00007f93466d1b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007f934672bf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6c7d6c2f R14: 00007f9343c05300 R15: 0000000000022000
irq event stamp: 15811
hardirqs last enabled at (15819): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (15828): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (15654): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (15643): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000086: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000430-0x0000000000000437]
CPU: 1 UID: 0 PID: 5164 Comm: syz-executor.4 Tainted: G W 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_free+0x1ab/0x5a0
Code: 0f 85 b4 03 00 00 4c 8b 65 38 4d 85 e4 74 41 e8 2b 48 30 00 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b8 03 00 00 49 8b 5c 24 30 bf 08 00 00 00 48 89
RSP: 0018:ffff8880190279f8 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 00000000ffff8880 RCX: ffffc9000b640000
RDX: 0000000000000086 RSI: ffffffff81447a85 RDI: 0000000000000430
RBP: ffff88804dd63068 R08: 0000000000000001 R09: ffffed1003204ef3
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000400
R13: ffff88800d00682c R14: ffff88801bbab4d0 R15: ffff88800ac38878
FS: 00007f9343c05700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fc05c8718 CR3: 000000000ef19000 CR4: 0000000000350ef0
Call Trace:
create_new_namespaces+0x585/0x750
copy_namespaces+0x45c/0x580
copy_process+0x26e4/0x72a0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f93466d1b19
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:00007f9343c05188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f93467e50e0 RCX: 00007f93466d1b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880
RBP: 00007f934672bf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6c7d6c2f R14: 00007f9343c05300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nsproxy_free+0x1ab/0x5a0
Code: 0f 85 b4 03 00 00 4c 8b 65 38 4d 85 e4 74 41 e8 2b 48 30 00 49 8d 7c 24 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b8 03 00 00 49 8b 5c 24 30 bf 08 00 00 00 48 89
RSP: 0018:ffff8880190279f8 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 00000000ffff8880 RCX: ffffc9000b640000
RDX: 0000000000000086 RSI: ffffffff81447a85 RDI: 0000000000000430
RBP: ffff88804dd63068 R08: 0000000000000001 R09: ffffed1003204ef3
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000400
R13: ffff88800d00682c R14: ffff88801bbab4d0 R15: ffff88800ac38878
FS: 00007f9343c05700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fc05c8718 CR3: 000000000ef19000 CR4: 0000000000350ef0
faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2
random: crng reseeded on system resumption
faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2
random: crng reseeded on system resumption
syz-executor.2 (5205) used greatest stack depth: 23024 bytes left
random: crng reseeded on system resumption
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=48926 sclass=netlink_route_socket pid=5229 comm=syz-executor.6
faux_driver regulatory: Direct firmware load for regulatory.db failed with error -2
----------------
Code disassembly (best guess):
0: 0f 85 b4 03 00 00 jne 0x3ba
6: 4c 8b 65 38 mov 0x38(%rbp),%r12
a: 4d 85 e4 test %r12,%r12
d: 74 41 je 0x50
f: e8 2b 48 30 00 callq 0x30483f
14: 49 8d 7c 24 30 lea 0x30(%r12),%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 b8 03 00 00 jne 0x3ec
34: 49 8b 5c 24 30 mov 0x30(%r12),%rbx
39: bf 08 00 00 00 mov $0x8,%edi
3e: 48 rex.W
3f: 89 .byte 0x89