./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1475830916 <...> syzkaller syzkaller login: [ 64.908529][ T26] kauditd_printk_skb: 42 callbacks suppressed [ 64.908549][ T26] audit: type=1400 audit(1687880076.731:77): avc: denied { transition } for pid=4845 comm="sshd" path="/bin/sh" dev="sda1" ino=89 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 64.937419][ T26] audit: type=1400 audit(1687880076.731:78): avc: denied { noatsecure } for pid=4845 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 64.956841][ T26] audit: type=1400 audit(1687880076.761:79): avc: denied { write } for pid=4845 comm="sh" path="pipe:[29814]" dev="pipefs" ino=29814 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 64.979687][ T26] audit: type=1400 audit(1687880076.761:80): avc: denied { rlimitinh } for pid=4845 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 64.998917][ T26] audit: type=1400 audit(1687880076.761:81): avc: denied { siginh } for pid=4845 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 66.444793][ T26] audit: type=1400 audit(1687880078.261:82): avc: denied { read } for pid=4429 comm="syslogd" name="log" dev="sda1" ino=1915 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 Warning: Permanently added '10.128.1.30' (ECDSA) to the list of known hosts. execve("./syz-executor1475830916", ["./syz-executor1475830916"], 0x7ffe4a3747f0 /* 10 vars */) = 0 brk(NULL) = 0x555556beb000 brk(0x555556bebc40) = 0x555556bebc40 arch_prctl(ARCH_SET_FS, 0x555556beb300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1475830916", 4096) = 28 brk(0x555556c0cc40) = 0x555556c0cc40 brk(0x555556c0d000) = 0x555556c0d000 mprotect(0x7fe57e462000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "/dev/vim2m", O_RDWR) = 3 ioctl(3, VIDIOC_REQBUFS, {type=V4L2_BUF_TYPE_VIDEO_OUTPUT, memory=V4L2_MEMORY_USERPTR, count=4294967264 => 27}) = 0 [ 83.963590][ T26] audit: type=1400 audit(1687880095.781:83): avc: denied { write } for pid=4992 comm="strace-static-x" path="pipe:[29668]" dev="pipefs" ino=29668 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 83.994009][ T26] audit: type=1400 audit(1687880095.811:84): avc: denied { execmem } for pid=4995 comm="syz-executor147" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 84.003002][ T4995] ------------[ cut here ]------------ [ 84.014514][ T26] audit: type=1400 audit(1687880095.811:85): avc: denied { read write } for pid=4995 comm="syz-executor147" name="video3" dev="devtmpfs" ino=850 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:v4l_device_t tclass=chr_file permissive=1 [ 84.019624][ T4995] get_vaddr_frames() cannot follow VM_IO mapping [ 84.043809][ T26] audit: type=1400 audit(1687880095.811:86): avc: denied { open } for pid=4995 comm="syz-executor147" path="/dev/video3" dev="devtmpfs" ino=850 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:v4l_device_t tclass=chr_file permissive=1 [ 84.045079][ T4995] WARNING: CPU: 0 PID: 4995 at drivers/media/common/videobuf2/frame_vector.c:63 get_vaddr_frames+0x220/0x230 [ 84.074183][ T26] audit: type=1400 audit(1687880095.811:87): avc: denied { ioctl } for pid=4995 comm="syz-executor147" path="/dev/video3" dev="devtmpfs" ino=850 ioctlcmd=0x5608 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:v4l_device_t tclass=chr_file permissive=1 [ 84.085575][ T4995] Modules linked in: [ 84.114973][ T4995] CPU: 0 PID: 4995 Comm: syz-executor147 Not tainted 6.4.0-syzkaller-01224-g1ef6663a587b #0 [ 84.125560][ T4995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 84.135779][ T4995] RIP: 0010:get_vaddr_frames+0x220/0x230 [ 84.141546][ T4995] Code: 75 12 fb e9 06 ff ff ff e8 ed 75 12 fb e9 cd fe ff ff e8 43 86 c0 fa 48 c7 c7 c0 fe 1e 8b c6 05 3e 76 a1 07 01 e8 60 1c 88 fa <0f> 0b e9 53 ff ff ff 66 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 [ 84.161231][ T4995] RSP: 0018:ffffc900034bf818 EFLAGS: 00010282 [ 84.167394][ T4995] RAX: 0000000000000000 RBX: ffff8880146cd000 RCX: 0000000000000000 [ 84.175388][ T4995] RDX: ffff888017f120c0 RSI: ffffffff814b2487 RDI: 0000000000000001 [ 84.183470][ T4995] RBP: ffff8880146cd004 R08: 0000000000000001 R09: 0000000000000000 [ 84.184921][ T26] audit: type=1400 audit(1687880096.001:88): avc: denied { append } for pid=4429 comm="syslogd" name="messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 84.191690][ T4995] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000fffffff2 [ 84.191715][ T4995] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88807bd5a800 [ 84.191736][ T4995] FS: 0000555556beb300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 84.191768][ T4995] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 84.214973][ T26] audit: type=1400 audit(1687880096.001:89): avc: denied { open } for pid=4429 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 84.222094][ T4995] CR2: 00000000005fdeb8 CR3: 0000000022dcb000 CR4: 00000000003506f0 [ 84.222122][ T4995] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 84.245901][ T26] audit: type=1400 audit(1687880096.001:90): avc: denied { getattr } for pid=4429 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=3 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 84.268184][ T4995] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 84.268212][ T4995] Call Trace: [ 84.268223][ T4995] [ 84.268235][ T4995] ? __warn+0xe6/0x390 [ 84.268280][ T4995] ? preempt_schedule_notrace+0x5f/0xd0 [ 84.331134][ T4995] ? get_vaddr_frames+0x220/0x230 [ 84.336193][ T4995] ? report_bug+0x2da/0x500 [ 84.340788][ T4995] ? handle_bug+0x3c/0x70 [ 84.345174][ T4995] ? exc_invalid_op+0x18/0x50 [ 84.349945][ T4995] ? asm_exc_invalid_op+0x1a/0x20 [ 84.355028][ T4995] ? __warn_printk+0x187/0x310 [ 84.359897][ T4995] ? get_vaddr_frames+0x220/0x230 [ 84.364974][ T4995] ? get_vaddr_frames+0x220/0x230 [ 84.370088][ T4995] vb2_create_framevec+0x62/0xd0 [ 84.375086][ T4995] vb2_vmalloc_get_userptr+0x13b/0x530 [ 84.380644][ T4995] ? vb2_vmalloc_dmabuf_ops_attach+0x430/0x430 [ 84.386948][ T4995] __prepare_userptr+0x6a6/0x1630 [ 84.392068][ T4995] ? vb2_queue_error+0x60/0x60 [ 84.396889][ T4995] ? print_usage_bug.part.0+0x660/0x660 [ 84.402559][ T4995] ? kasan_save_stack+0x22/0x40 [ 84.407790][ T4995] ? kasan_set_track+0x25/0x30 [ 84.412586][ T4995] ? kasan_save_free_info+0x2b/0x40 [ 84.417885][ T4995] ? ____kasan_slab_free+0x13b/0x1a0 [ 84.423228][ T4995] ? lock_sync+0x190/0x190 [ 84.427747][ T4995] ? rcu_is_watching+0x12/0xb0 [ 84.432584][ T4995] ? trace_contention_end+0xd8/0x100 [ 84.437948][ T4995] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 84.443896][ T4995] __buf_prepare+0x602/0x7d0 [ 84.448583][ T4995] vb2_core_prepare_buf+0xe4/0x330 [ 84.453747][ T4995] vb2_prepare_buf+0x103/0x190 [ 84.458604][ T4995] v4l2_m2m_prepare_buf+0xe8/0x210 [ 84.463769][ T4995] v4l_prepare_buf+0x96/0xc0 [ 84.468449][ T4995] __video_do_ioctl+0xba6/0xf20 [ 84.473364][ T4995] ? v4l_reqbufs+0xd0/0xd0 [ 84.477912][ T4995] video_usercopy+0x4bf/0x14c0 [ 84.482728][ T4995] ? v4l_reqbufs+0xd0/0xd0 [ 84.487172][ T4995] ? selinux_bprm_creds_for_exec+0xa80/0xb20 [ 84.493259][ T4995] ? v4l_enumstd+0x70/0x70 [ 84.497759][ T4995] ? lock_downgrade+0x690/0x690 [ 84.502665][ T4995] v4l2_ioctl+0x1bd/0x250 [ 84.507058][ T4995] ? v4l2_write+0x350/0x350 [ 84.511644][ T4995] __x64_sys_ioctl+0x19d/0x210 [ 84.516453][ T4995] do_syscall_64+0x39/0xb0 [ 84.520963][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 84.526915][ T4995] RIP: 0033:0x7fe57e3f5c49 [ 84.531433][ T4995] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 84.551154][ T4995] RSP: 002b:00007ffc4b5c00e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 84.559673][ T4995] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe57e3f5c49 [ 84.567770][ T4995] RDX: 0000000020000300 RSI: 00000000c058565d RDI: 0000000000000003 [ 84.575775][ T4995] RBP: 00007fe57e3b9df0 R08: 0000000000000000 R09: 0000000000000000 [ 84.583916][ T4995] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe57e3b9e80 [ 84.591976][ T4995] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 84.600027][ T4995] [ 84.603086][ T4995] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 84.610380][ T4995] CPU: 0 PID: 4995 Comm: syz-executor147 Not tainted 6.4.0-syzkaller-01224-g1ef6663a587b #0 [ 84.620469][ T4995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 84.630537][ T4995] Call Trace: [ 84.633829][ T4995] [ 84.636777][ T4995] dump_stack_lvl+0xd9/0x150 [ 84.641437][ T4995] panic+0x686/0x730 [ 84.645362][ T4995] ? panic_smp_self_stop+0xa0/0xa0 [ 84.650503][ T4995] ? show_trace_log_lvl+0x284/0x390 [ 84.655730][ T4995] ? get_vaddr_frames+0x220/0x230 [ 84.660801][ T4995] check_panic_on_warn+0xb1/0xc0 [ 84.665806][ T4995] __warn+0xf2/0x390 [ 84.669901][ T4995] ? preempt_schedule_notrace+0x5f/0xd0 [ 84.675508][ T4995] ? get_vaddr_frames+0x220/0x230 [ 84.680595][ T4995] report_bug+0x2da/0x500 [ 84.684974][ T4995] handle_bug+0x3c/0x70 [ 84.689167][ T4995] exc_invalid_op+0x18/0x50 [ 84.693715][ T4995] asm_exc_invalid_op+0x1a/0x20 [ 84.698603][ T4995] RIP: 0010:get_vaddr_frames+0x220/0x230 [ 84.704278][ T4995] Code: 75 12 fb e9 06 ff ff ff e8 ed 75 12 fb e9 cd fe ff ff e8 43 86 c0 fa 48 c7 c7 c0 fe 1e 8b c6 05 3e 76 a1 07 01 e8 60 1c 88 fa <0f> 0b e9 53 ff ff ff 66 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 [ 84.723916][ T4995] RSP: 0018:ffffc900034bf818 EFLAGS: 00010282 [ 84.730032][ T4995] RAX: 0000000000000000 RBX: ffff8880146cd000 RCX: 0000000000000000 [ 84.738033][ T4995] RDX: ffff888017f120c0 RSI: ffffffff814b2487 RDI: 0000000000000001 [ 84.746027][ T4995] RBP: ffff8880146cd004 R08: 0000000000000001 R09: 0000000000000000 [ 84.754021][ T4995] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000fffffff2 [ 84.762015][ T4995] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88807bd5a800 [ 84.770013][ T4995] ? __warn_printk+0x187/0x310 [ 84.774820][ T4995] ? get_vaddr_frames+0x220/0x230 [ 84.779876][ T4995] vb2_create_framevec+0x62/0xd0 [ 84.785034][ T4995] vb2_vmalloc_get_userptr+0x13b/0x530 [ 84.790636][ T4995] ? vb2_vmalloc_dmabuf_ops_attach+0x430/0x430 [ 84.796861][ T4995] __prepare_userptr+0x6a6/0x1630 [ 84.801924][ T4995] ? vb2_queue_error+0x60/0x60 [ 84.806722][ T4995] ? print_usage_bug.part.0+0x660/0x660 [ 84.812306][ T4995] ? kasan_save_stack+0x22/0x40 [ 84.817270][ T4995] ? kasan_set_track+0x25/0x30 [ 84.822073][ T4995] ? kasan_save_free_info+0x2b/0x40 [ 84.827305][ T4995] ? ____kasan_slab_free+0x13b/0x1a0 [ 84.832662][ T4995] ? lock_sync+0x190/0x190 [ 84.837216][ T4995] ? rcu_is_watching+0x12/0xb0 [ 84.842030][ T4995] ? trace_contention_end+0xd8/0x100 [ 84.847342][ T4995] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 84.853271][ T4995] __buf_prepare+0x602/0x7d0 [ 84.857899][ T4995] vb2_core_prepare_buf+0xe4/0x330 [ 84.863051][ T4995] vb2_prepare_buf+0x103/0x190 [ 84.867864][ T4995] v4l2_m2m_prepare_buf+0xe8/0x210 [ 84.873020][ T4995] v4l_prepare_buf+0x96/0xc0 [ 84.877650][ T4995] __video_do_ioctl+0xba6/0xf20 [ 84.882549][ T4995] ? v4l_reqbufs+0xd0/0xd0 [ 84.886997][ T4995] video_usercopy+0x4bf/0x14c0 [ 84.891794][ T4995] ? v4l_reqbufs+0xd0/0xd0 [ 84.896238][ T4995] ? selinux_bprm_creds_for_exec+0xa80/0xb20 [ 84.902252][ T4995] ? v4l_enumstd+0x70/0x70 [ 84.906707][ T4995] ? lock_downgrade+0x690/0x690 [ 84.911599][ T4995] v4l2_ioctl+0x1bd/0x250 [ 84.915975][ T4995] ? v4l2_write+0x350/0x350 [ 84.920527][ T4995] __x64_sys_ioctl+0x19d/0x210 [ 84.925327][ T4995] do_syscall_64+0x39/0xb0 [ 84.929791][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 84.935824][ T4995] RIP: 0033:0x7fe57e3f5c49 [ 84.940259][ T4995] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 84.959976][ T4995] RSP: 002b:00007ffc4b5c00e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 84.968416][ T4995] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe57e3f5c49 [ 84.976405][ T4995] RDX: 0000000020000300 RSI: 00000000c058565d RDI: 0000000000000003 [ 84.984394][ T4995] RBP: 00007fe57e3b9df0 R08: 0000000000000000 R09: 0000000000000000 [ 84.992391][ T4995] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe57e3b9e80 [ 85.000385][ T4995] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 85.008391][ T4995] [ 85.011647][ T4995] Kernel Offset: disabled [ 85.016082][ T4995] Rebooting in 86400 seconds..