./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2467231581 <...> forked to background, child pid 3184 no interfaces have a carrier [ 26.734824][ T3185] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.744925][ T3185] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.226' (ECDSA) to the list of known hosts. execve("./syz-executor2467231581", ["./syz-executor2467231581"], 0x7ffef5e21540 /* 10 vars */) = 0 brk(NULL) = 0x555557320000 brk(0x555557320d00) = 0x555557320d00 arch_prctl(ARCH_SET_FS, 0x5555573203c0) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2467231581", 4096) = 28 brk(0x555557341d00) = 0x555557341d00 brk(0x555557342000) = 0x555557342000 mprotect(0x7f40155d8000, 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, "/sys/kernel/debug/failslab/ignore-gfp-wait", O_WRONLY|O_CLOEXEC) = 3 write(3, "N", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/sys/kernel/debug/fail_futex/ignore-private", O_WRONLY|O_CLOEXEC) = 3 write(3, "N", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", O_WRONLY|O_CLOEXEC) = 3 write(3, "N", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", O_WRONLY|O_CLOEXEC) = 3 write(3, "N", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/min-order", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7f4015523450, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f4015526a30}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f4015523450, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f4015526a30}, NULL, 8) = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3614 attached , child_tidptr=0x555557320690) = 3614 [pid 3614] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3614] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3614] setsid() = 1 [pid 3614] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3614] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3614] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3614] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3614] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3614] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3614] unshare(CLONE_NEWNS) = 0 [pid 3614] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3614] unshare(CLONE_NEWIPC) = 0 [pid 3614] unshare(CLONE_NEWCGROUP) = 0 [pid 3614] unshare(CLONE_NEWUTS) = 0 [pid 3614] unshare(CLONE_SYSVSEM) = 0 [pid 3614] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3614] write(3, "16777216", 8) = 8 [pid 3614] close(3) = 0 [pid 3614] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3614] write(3, "536870912", 9) = 9 [pid 3614] close(3) = 0 [pid 3614] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3614] write(3, "1024", 4) = 4 [pid 3614] close(3) = 0 [pid 3614] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3614] write(3, "8192", 4) = 4 [pid 3614] close(3) = 0 [pid 3614] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3614] write(3, "1024", 4) = 4 [pid 3614] close(3) = 0 [pid 3614] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3614] write(3, "1024", 4) = 4 [pid 3614] close(3) = 0 [pid 3614] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3614] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3614] close(3) = 0 [pid 3614] getpid() = 1 [pid 3614] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e2 [ 52.168369][ T3614] RSP: 0018:ffffc9000394fc58 EFLAGS: 00010246 [ 52.174430][ T3614] RAX: dffffc0000000000 RBX: ffffffff8cb67800 RCX: 0000000000000000 [ 52.182384][ T3614] RDX: 0000000000000000 RSI: ffffffff84ad27e0 RDI: 0000000000000000 [ 52.190336][ T3614] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 52.198293][ T3614] R10: 0000000000000000 R11: 000000000008c07c R12: ffff88801e7d8000 [ 52.206247][ T3614] R13: ffff8880740f6208 R14: ffff888022c25cc0 R15: 0000000000000000 [ 52.214202][ T3614] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 52.223116][ T3614] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.229687][ T3614] CR2: 00007f40155dc160 CR3: 000000000bc8e000 CR4: 00000000003506f0 [ 52.237642][ T3614] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.245594][ T3614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.253547][ T3614] Call Trace: [ 52.256818][ T3614] [ 52.259735][ T3614] dma_buf_release+0x157/0x2d0 [ 52.264487][ T3614] ? dmabuffs_dname+0x240/0x240 [ 52.269323][ T3614] __dentry_kill+0x42b/0x640 [ 52.273898][ T3614] ? dput+0x35/0xdb0 [ 52.277776][ T3614] ? dput+0x35/0xdb0 [ 52.281666][ T3614] dput+0x806/0xdb0 [ 52.285464][ T3614] __fput+0x39c/0x9d0 [ 52.289434][ T3614] task_work_run+0xdd/0x1a0 [ 52.293921][ T3614] do_exit+0xad5/0x29b0 [ 52.298066][ T3614] ? mm_update_next_owner+0x7a0/0x7a0 [ 52.303432][ T3614] ? _raw_spin_unlock_irq+0x1f/0x40 [ 52.308616][ T3614] ? _raw_spin_unlock_irq+0x1f/0x40 [ 52.313800][ T3614] do_group_exit+0xd2/0x2f0 [ 52.318289][ T3614] __x64_sys_exit_group+0x3a/0x50 [ 52.323309][ T3614] do_syscall_64+0x35/0xb0 [ 52.327723][ T3614] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 52.333602][ T3614] RIP: 0033:0x7f4015563559 [ 52.338002][ T3614] Code: Unable to access opcode bytes at RIP 0x7f401556352f. [ 52.345343][ T3614] RSP: 002b:00007fff91769638 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 52.353741][ T3614] RAX: ffffffffffffffda RBX: 00007f40155de430 RCX: 00007f4015563559 [ 52.361708][ T3614] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 52.369659][ T3614] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000034 [ 52.377615][ T3614] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f40155de430 [ 52.385576][ T3614] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 52.393537][ T3614] [ 52.396542][ T3614] Modules linked in: [ 52.403905][ T3614] ---[ end trace 0000000000000000 ]--- [ 52.409817][ T3614] RIP: 0010:release_udmabuf+0xcb/0x4f0 [ 52.415316][ T3614] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2b 04 00 00 48 8d 7d 0c 4c 8b 63 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e2 [ 52.435559][ T3614] RSP: 0018:ffffc9000394fc58 EFLAGS: 00010246 [ 52.442496][ T3614] RAX: dffffc0000000000 RBX: ffffffff8cb67800 RCX: 0000000000000000 [ 52.450654][ T3614] RDX: 0000000000000000 RSI: ffffffff84ad27e0 RDI: 0000000000000000 [ 52.458820][ T3614] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 52.458981][ T41] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 52.467395][ T3614] R10: 0000000000000000 R11: 000000000008c07c R12: ffff88801e7d8000 [ 52.485396][ T3614] R13: ffff8880740f6208 R14: ffff888022c25cc0 R15: 0000000000000000 [ 52.493571][ T3614] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 52.503197][ T3614] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.509901][ T3614] CR2: 00007f40155dc160 CR3: 000000007e556000 CR4: 00000000003506f0 [ 52.518456][ T3614] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.526416][ T3614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.534731][ T3614] Kernel panic - not syncing: Fatal exception [ 52.540949][ T3614] Kernel Offset: disabled [ 52.545275][ T3614] Rebooting in 86400 seconds..