./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor906907093 <...> forked to background, child pid 3183 no interfaces have a carrier [ 22.946432][ T3184] 8021q: adding VLAN 0 to HW filter on device bond0 [ 22.959446][ T3184] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.156' (ECDSA) to the list of known hosts. execve("./syz-executor906907093", ["./syz-executor906907093"], 0x7ffcf0194830 /* 10 vars */) = 0 brk(NULL) = 0x555556df8000 brk(0x555556df8c40) = 0x555556df8c40 arch_prctl(ARCH_SET_FS, 0x555556df8300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor906907093", 4096) = 27 brk(0x555556e19c40) = 0x555556e19c40 brk(0x555556e1a000) = 0x555556e1a000 mprotect(0x7fe69fe1a000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3612 attached , child_tidptr=0x555556df85d0) = 3612 [pid 3612] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3612] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3612] setsid() = 1 [pid 3612] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3612] unshare(CLONE_NEWNS) = 0 [pid 3612] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3612] unshare(CLONE_NEWIPC) = 0 [pid 3612] unshare(CLONE_NEWCGROUP) = 0 [pid 3612] unshare(CLONE_NEWUTS) = 0 [pid 3612] unshare(CLONE_SYSVSEM) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "16777216", 8) = 8 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "536870912", 9) = 9 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "8192", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3612] close(3) = 0 [pid 3612] getpid() = 1 [pid 3612] 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 [ 44.811681][ T3612] RSP: 0018:ffffc9000397fc58 EFLAGS: 00010256 [ 44.817729][ T3612] RAX: dffffc0000000000 RBX: ffffffff8cb681e0 RCX: 0000000000000000 [ 44.825683][ T3612] RDX: 0000000000000000 RSI: ffffffff84ada4e0 RDI: 0000000000000000 [ 44.833896][ T3612] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 44.841850][ T3612] R10: 0000000000000000 R11: 000000000008c07c R12: ffff8881476dd000 [ 44.849805][ T3612] R13: ffff88807354ec50 R14: ffff88806ff14500 R15: 0000000000000000 [ 44.858122][ T3612] FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 44.867059][ T3612] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.873978][ T3612] CR2: 00007fe69fe1e160 CR3: 000000000bc8e000 CR4: 0000000000350ee0 [ 44.881933][ T3612] Call Trace: [ 44.885196][ T3612] [ 44.888117][ T3612] dma_buf_release+0x157/0x2d0 [ 44.892869][ T3612] ? dmabuffs_dname+0x240/0x240 [ 44.897700][ T3612] __dentry_kill+0x42b/0x640 [ 44.902268][ T3612] ? dput+0x35/0xdb0 [ 44.906149][ T3612] ? dput+0x35/0xdb0 [ 44.910025][ T3612] dput+0x806/0xdb0 [ 44.913810][ T3612] __fput+0x39c/0x9d0 [ 44.917774][ T3612] task_work_run+0xdd/0x1a0 [ 44.922420][ T3612] do_exit+0xad5/0x29b0 [ 44.926559][ T3612] ? mm_update_next_owner+0x7a0/0x7a0 [ 44.931910][ T3612] ? _raw_spin_unlock_irq+0x1f/0x40 [ 44.937092][ T3612] ? _raw_spin_unlock_irq+0x1f/0x40 [ 44.942274][ T3612] do_group_exit+0xd2/0x2f0 [ 44.946763][ T3612] __x64_sys_exit_group+0x3a/0x50 [ 44.951769][ T3612] do_syscall_64+0x35/0xb0 [ 44.956172][ T3612] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.962045][ T3612] RIP: 0033:0x7fe69fda50c9 [ 44.966438][ T3612] Code: Unable to access opcode bytes at RIP 0x7fe69fda509f. [ 44.973867][ T3612] RSP: 002b:00007ffff5364518 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.982257][ T3612] RAX: ffffffffffffffda RBX: 00007fe69fe20430 RCX: 00007fe69fda50c9 [ 44.990211][ T3612] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 44.998166][ T3612] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000000 [ 45.006292][ T3612] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe69fe20430 [ 45.014261][ T3612] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 45.022565][ T3612] [ 45.025574][ T3612] Modules linked in: [ 45.030617][ T3612] ---[ end trace 0000000000000000 ]--- [ 45.036810][ T3612] RIP: 0010:release_udmabuf+0xcb/0x4f0 [ 45.042301][ T3612] 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 [ 45.062199][ T3612] RSP: 0018:ffffc9000397fc58 EFLAGS: 00010256 [ 45.068317][ T3612] RAX: dffffc0000000000 RBX: ffffffff8cb681e0 RCX: 0000000000000000 [ 45.076833][ T3612] RDX: 0000000000000000 RSI: ffffffff84ada4e0 RDI: 0000000000000000 [ 45.084839][ T3612] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 45.093174][ T3612] R10: 0000000000000000 R11: 000000000008c07c R12: ffff8881476dd000 [ 45.101309][ T3612] R13: ffff88807354ec50 R14: ffff88806ff14500 R15: 0000000000000000 [ 45.101552][ T1040] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 45.119648][ T3612] FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 45.128659][ T3612] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.136010][ T3612] CR2: 00007fe69fe1e160 CR3: 000000007f0d8000 CR4: 0000000000350ee0 [ 45.143996][ T3612] Kernel panic - not syncing: Fatal exception [ 45.150609][ T3612] Kernel Offset: disabled [ 45.155004][ T3612] Rebooting in 86400 seconds..