./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1622770577 <...> forked to background, child pid 3182 no interfaces have a carrier [ 23.725824][ T3183] 8021q: adding VLAN 0 to HW filter on device bond0 [ 23.735336][ T3183] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. execve("./syz-executor1622770577", ["./syz-executor1622770577"], 0x7fffd590fcd0 /* 10 vars */) = 0 brk(NULL) = 0x55555678f000 brk(0x55555678fc40) = 0x55555678fc40 arch_prctl(ARCH_SET_FS, 0x55555678f300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1622770577", 4096) = 28 brk(0x5555567b0c40) = 0x5555567b0c40 brk(0x5555567b1000) = 0x5555567b1000 mprotect(0x7f2fb50d2000, 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 mount(NULL, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, NULL) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "/proc/sys/fs/binfmt_misc/register", O_WRONLY|O_CLOEXEC) = 3 write(3, "\x3a\x73\x79\x7a\x30\x3a\x4d\x3a\x30\x3a\x01\x3a\x3a\x2e\x2f\x66\x69\x6c\x65\x30\x3a", 21) = 21 close(3) = 0 openat(AT_FDCWD, "/proc/sys/fs/binfmt_misc/register", O_WRONLY|O_CLOEXEC) = 3 write(3, "\x3a\x73\x79\x7a\x31\x3a\x4d\x3a\x31\x3a\x02\x3a\x3a\x2e\x2f\x66\x69\x6c\x65\x30\x3a\x50\x4f\x43", 24) = 24 close(3) = 0 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3604 attached , child_tidptr=0x55555678f5d0) = 3604 [pid 3604] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3604] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3604] setsid() = 1 [pid 3604] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3604] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3604] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3604] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3604] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3604] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3604] unshare(CLONE_NEWNS) = 0 [pid 3604] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3604] unshare(CLONE_NEWIPC) = 0 [pid 3604] unshare(CLONE_NEWCGROUP) = 0 [pid 3604] unshare(CLONE_NEWUTS) = 0 [pid 3604] unshare(CLONE_SYSVSEM) = 0 [pid 3604] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3604] write(3, "16777216", 8) = 8 [pid 3604] close(3) = 0 [pid 3604] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3604] write(3, "536870912", 9) = 9 [pid 3604] close(3) = 0 [pid 3604] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3604] write(3, "1024", 4) = 4 [pid 3604] close(3) = 0 [pid 3604] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3604] write(3, "8192", 4) = 4 [pid 3604] close(3) = 0 [pid 3604] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3604] write(3, "1024", 4) = 4 [pid 3604] close(3) = 0 [pid 3604] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3604] write(3, "1024", 4) = 4 [pid 3604] close(3) = 0 [pid 3604] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3604] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3604] close(3) = 0 [pid 3604] getpid() = 1 [pid 3604] 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 [ 45.481765][ T3604] RSP: 0018:ffffc9000395fc58 EFLAGS: 00010256 [ 45.487817][ T3604] RAX: dffffc0000000000 RBX: ffffffff8cb681e0 RCX: 0000000000000000 [ 45.495776][ T3604] RDX: 0000000000000000 RSI: ffffffff84ada4e0 RDI: 0000000000000000 [ 45.503735][ T3604] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 45.511808][ T3604] R10: 0000000000000000 R11: 000000000008c07c R12: ffff888147721000 [ 45.519877][ T3604] R13: ffff88807404a090 R14: ffff88801bb8bdc0 R15: 0000000000000000 [ 45.527869][ T3604] FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 45.536794][ T3604] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.543378][ T3604] CR2: 00007f2fb50a7908 CR3: 000000000bc8e000 CR4: 0000000000350ee0 [ 45.551344][ T3604] Call Trace: [ 45.554605][ T3604] [ 45.557521][ T3604] dma_buf_release+0x157/0x2d0 [ 45.562287][ T3604] ? dmabuffs_dname+0x240/0x240 [ 45.567128][ T3604] __dentry_kill+0x42b/0x640 [ 45.571709][ T3604] ? dput+0x35/0xdb0 [ 45.575594][ T3604] ? dput+0x35/0xdb0 [ 45.579483][ T3604] dput+0x806/0xdb0 [ 45.583301][ T3604] __fput+0x39c/0x9d0 [ 45.587268][ T3604] task_work_run+0xdd/0x1a0 [ 45.591760][ T3604] do_exit+0xad5/0x29b0 [ 45.595902][ T3604] ? mm_update_next_owner+0x7a0/0x7a0 [ 45.601268][ T3604] ? _raw_spin_unlock_irq+0x1f/0x40 [ 45.606468][ T3604] ? _raw_spin_unlock_irq+0x1f/0x40 [ 45.611746][ T3604] do_group_exit+0xd2/0x2f0 [ 45.616237][ T3604] __x64_sys_exit_group+0x3a/0x50 [ 45.621247][ T3604] do_syscall_64+0x35/0xb0 [ 45.625650][ T3604] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 45.631619][ T3604] RIP: 0033:0x7f2fb505d109 [ 45.636016][ T3604] Code: Unable to access opcode bytes at RIP 0x7f2fb505d0df. [ 45.643362][ T3604] RSP: 002b:00007fff77114458 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.651761][ T3604] RAX: ffffffffffffffda RBX: 00007f2fb50d8430 RCX: 00007f2fb505d109 [ 45.659729][ T3604] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 45.667720][ T3604] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000000 [ 45.675680][ T3604] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2fb50d8430 [ 45.683641][ T3604] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 45.691623][ T3604] [ 45.694629][ T3604] Modules linked in: [ 45.703277][ T3604] ---[ end trace 0000000000000000 ]--- [ 45.708786][ T3604] RIP: 0010:release_udmabuf+0xcb/0x4f0 [ 45.714449][ T3604] 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 [ 45.734236][ T3604] RSP: 0018:ffffc9000395fc58 EFLAGS: 00010256 [ 45.740386][ T3604] RAX: dffffc0000000000 RBX: ffffffff8cb681e0 RCX: 0000000000000000 [ 45.748375][ T3604] RDX: 0000000000000000 RSI: ffffffff84ada4e0 RDI: 0000000000000000 [ 45.756706][ T3604] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 45.765280][ T3604] R10: 0000000000000000 R11: 000000000008c07c R12: ffff888147721000 [ 45.773406][ T3604] R13: ffff88807404a090 R14: ffff88801bb8bdc0 R15: 0000000000000000 [ 45.781473][ T3604] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 45.790511][ T3604] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.791040][ T37] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 45.797099][ T3604] CR2: 00007fd2ed62c300 CR3: 000000000bc8e000 CR4: 0000000000350ef0 [ 45.815621][ T3604] Kernel panic - not syncing: Fatal exception [ 45.822283][ T3604] Kernel Offset: disabled [ 45.826619][ T3604] Rebooting in 86400 seconds..