audit: type=1107 audit(1756494745.597:12): pid=4016 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 msg='àhôxÈÆ'
Zero length message leads to an empty skb
------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.6/4044
Modules linked in:
CPU: 0 UID: 0 PID: 4044 Comm: syz-executor.6 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:mntput_no_expire+0x78e/0xbe0
Code: 05 16 42 81 04 01 e8 31 f8 91 ff e9 41 fc ff ff e8 b7 50 b4 ff 31 ff 44 89 ee e8 dd 4b b4 ff 45 85 ed 79 09 e8 a3 50 b4 ff 90 <0f> 0b 90 e8 9a 50 b4 ff e8 75 f6 fb 02 31 ff 89 c5 89 c6 e8 ba 4b
RSP: 0018:ffff88801f27fa18 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11003e4ff48 RCX: ffffffff81bf96d3
RDX: ffff88801f261b80 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88800c65e540 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000fffffffd R11: 0000000000000001 R12: ffff88801f27fa80
R13: 00000000fffffffd R14: ffff88800c65e540 R15: ffff88800c65e4d0
FS: 0000000000000000(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8e8c3b368 CR3: 000000000d364000 CR4: 0000000000350ef0
Call Trace:
cleanup_mnt+0x41e/0x430
task_work_run+0x172/0x280
do_exit+0x846/0x2970
do_group_exit+0xd3/0x2a0
get_signal+0x2315/0x2340
arch_do_signal_or_restart+0x80/0x790
irqentry_exit_to_user_mode+0x106/0x1c0
exc_page_fault+0xd9/0x180
asm_exc_page_fault+0x26/0x30
RIP: 0033:0xe
Code: Unable to access opcode bytes at 0xffffffffffffffe4.
RSP: 002b:00007f1918c50190 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f191b7edf60 RCX: 00007f191b6dab19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200002c0
RBP: 00007f191b734f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd337eda2f R14: 00007f1918c50300 R15: 0000000000022000
irq event stamp: 771
hardirqs last enabled at (781): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (790): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (364): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (359): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
audit: type=1400 audit(1756494754.786:13): avc: denied { relabelto } for pid=4060 comm="syz-executor.6" name="UDPLITEv6" dev="sockfs" ino=5962 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:semanage_trans_lock_t:s0 tclass=rawip_socket permissive=1
Oops: general protection fault, probably for non-canonical address 0xdffffc0020000032: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000100000190-0x0000000100000197]
CPU: 1 UID: 0 PID: 4073 Comm: syz-executor.3 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:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff88801603f780 EFLAGS: 00010012
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: ffffc9000260c000
RDX: 0000000000040000 RSI: ffffffff818995b7 RDI: 0000000100000190
audit: type=1400 audit(1756494754.824:14): avc: denied { ingress } for pid=246 comm="sshd" saddr=10.0.2.2 src=57060 daddr=10.0.2.15 dest=22 netif=eth0 scontext=system_u:object_r:bin_t:s0 tcontext=system_u:object_r:netif_t:s0 tclass=netif permissive=1
RBP: ffff88801603f9f0 R08: ffff88806cf31340 R09: ffffe8ffffd16038
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806cf31340 R15: dffffc0000000000
loop7: detected capacity change from 0 to 512
FS: 00007f51d1e02700(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23ffa010a8 CR3: 000000001e94d000 CR4: 0000000000350ef0
audit: type=1400 audit(1756494754.824:15): avc: denied { recvfrom } for pid=246 comm="sshd" saddr=10.0.2.2 src=57060 daddr=10.0.2.15 dest=22 netif=eth0 scontext=system_u:object_r:bin_t:s0 tcontext=system_u:object_r:node_t:s0 tclass=node permissive=1
Call Trace:
ext4: Unknown parameter 'f0'
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_preemptirq_template+0x259/0x430
trace_irq_disable.constprop.0+0xa6/0x100
_raw_spin_lock_irqsave+0x53/0x60
try_to_wake_up+0xa0/0x11d0
wake_up_q+0xa1/0x130
futex_wake+0x47e/0x540
do_futex+0x26d/0x370
__x64_sys_futex+0x1c9/0x4d0
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f51d488cb19
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:00007f51d1e02218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f51d499ff68 RCX: 00007f51d488cb19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f51d499ff6c
RBP: 00007f51d499ff60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007f51d499ff6c
R13: 00007ffd85b350df R14: 00007f51d1e02300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff88801603f780 EFLAGS: 00010012
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: ffffc9000260c000
RDX: 0000000000040000 RSI: ffffffff818995b7 RDI: 0000000100000190
RBP: ffff88801603f9f0 R08: ffff88806cf31340 R09: ffffe8ffffd16038
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806cf31340 R15: dffffc0000000000
FS: 00007f51d1e02700(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23ffa010a8 CR3: 000000001e94d000 CR4: 0000000000350ef0
note: syz-executor.3[4073] exited with irqs disabled
Oops: general protection fault, probably for non-canonical address 0xdffffc0020000032: 0000 [#2] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000100000190-0x0000000100000197]
CPU: 1 UID: 0 PID: 4073 Comm: syz-executor.3 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:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff88806cf08ac0 EFLAGS: 00010012
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: 0000000000000002
RDX: ffff888017b8d280 RSI: ffffffff818995b7 RDI: 0000000100000190
RBP: ffff88806cf08d30 R08: ffff88806cf313e8 R09: ffffe8ffffd16038
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806cf313e8 R15: dffffc0000000000
FS: 00007f51d1e02700(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23ffa010a8 CR3: 000000001e94d000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_preemptirq_template+0x259/0x430
trace_irq_disable.constprop.0+0xa6/0x100
irqentry_enter+0x2a/0x60
sysvec_call_function_single+0x18/0xc0
asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:handle_softirqs+0x174/0x770
Code: c8 83 83 3c 0a 00 00 01 c7 44 24 20 0a 00 00 00 48 89 44 24 18 65 66 c7 05 0f 84 48 06 00 00 e8 42 80 40 00 fb bb ff ff ff ff <48> c7 c5 c0 c0 a0 85 41 0f bc de 83 c3 01 0f 85 9b 00 00 00 e9 8d
RSP: 0018:ffff88806cf08f78 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00000000ffffffff RCX: ffffffff817c2b86
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff813bac2e
RBP: ffff88801603fe78 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8643ac57 R11: ffff88801e375898 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000280 R15: 0000000000000000
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x70/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:make_task_dead+0xa2/0x3b0
Code: 38 00 85 db 0f 84 21 01 00 00 e8 d9 96 38 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 27 92 38 00 48 85 db 0f 84 17 01 00 00 b9 96 38 00 31 ff 65 8b 1d 60 df 48 06 81 e3 ff ff ff 7f 89 de
RSP: 0018:ffff88801603ff28 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff888017b8d280 RCX: ffffffff817c2b86
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff813b5234
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8643ac57 R11: 0000000000000001 R12: ffff888017b8d280
R13: 0000000000000000 R14: dffffc0020000032 R15: 0000000000000000
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7f51d488cb19
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:00007f51d1e02218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f51d499ff68 RCX: 00007f51d488cb19
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f51d499ff6c
RBP: 00007f51d499ff60 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007f51d499ff6c
R13: 00007ffd85b350df R14: 00007f51d1e02300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff88801603f780 EFLAGS: 00010012
RAX: 0000000020000032 RBX: 00000000ffffffa0 RCX: ffffc9000260c000
RDX: 0000000000040000 RSI: ffffffff818995b7 RDI: 0000000100000190
RBP: ffff88801603f9f0 R08: ffff88806cf31340 R09: ffffe8ffffd16038
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806cf31340 R15: dffffc0000000000
FS: 00007f51d1e02700(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23ffa010a8 CR3: 000000001e94d000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: df 48 89 fisttps -0x77(%rax)
3: 85 a8 fd ff ff 48 test %ebp,0x48fffffd(%rax)
9: c1 e8 03 shr $0x3,%eax
c: 4c 01 e0 add %r12,%rax
f: 48 89 85 c8 fd ff ff mov %rax,-0x238(%rbp)
16: e8 c9 51 ea ff callq 0xffea51e4
1b: 48 8d bb f0 01 00 00 lea 0x1f0(%rbx),%rdi
22: 48 89 f8 mov %rdi,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e c5 0b 00 00 jle 0xbff
3a: 44 rex.R
3b: 8b .byte 0x8b
3c: ab stos %eax,%es:(%rdi)
3d: f0 lock
3e: 01 .byte 0x1