./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3369639972 <...> forked to background, child pid 3182 no interfaces have a carrier [ 21.971901][ T3183] 8021q: adding VLAN 0 to HW filter on device bond0 [ 21.982101][ T3183] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.100' (ECDSA) to the list of known hosts. execve("./syz-executor3369639972", ["./syz-executor3369639972"], 0x7ffe63c45840 /* 10 vars */) = 0 brk(NULL) = 0x5555567b3000 brk(0x5555567b3c40) = 0x5555567b3c40 arch_prctl(ARCH_SET_FS, 0x5555567b3300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3369639972", 4096) = 28 brk(0x5555567d4c40) = 0x5555567d4c40 brk(0x5555567d5000) = 0x5555567d5000 mprotect(0x7ff519fa3000, 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 3605 attached , child_tidptr=0x5555567b35d0) = 3605 [pid 3605] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3605] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3605] setsid() = 1 [pid 3605] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0 [pid 3605] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3605] unshare(CLONE_NEWNS) = 0 [pid 3605] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3605] unshare(CLONE_NEWIPC) = 0 [pid 3605] unshare(CLONE_NEWCGROUP) = 0 [pid 3605] unshare(CLONE_NEWUTS) = 0 [pid 3605] unshare(CLONE_SYSVSEM) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "16777216", 8) = 8 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "536870912", 9) = 9 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "8192", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024", 4) = 4 [pid 3605] close(3) = 0 [pid 3605] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3605] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3605] close(3) = 0 [pid 3605] getpid() = 1 [pid 3605] 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 [ 41.556977][ T3605] RSP: 0018:ffffc90003a7fc58 EFLAGS: 00010256 [ 41.563032][ T3605] RAX: dffffc0000000000 RBX: ffffffff8cb681e0 RCX: 0000000000000000 [ 41.570992][ T3605] RDX: 0000000000000000 RSI: ffffffff84ada4e0 RDI: 0000000000000000 [ 41.578954][ T3605] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 41.586914][ T3605] R10: 0000000000000000 R11: 000000000008c07c R12: ffff88801e7e8000 [ 41.594868][ T3605] R13: ffff888074429698 R14: ffff8880273eadc0 R15: 0000000000000000 [ 41.602826][ T3605] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 41.611743][ T3605] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.618313][ T3605] CR2: 00007f27b98f8300 CR3: 00000000258fb000 CR4: 0000000000350ef0 [ 41.626444][ T3605] Call Trace: [ 41.629706][ T3605] [ 41.632625][ T3605] dma_buf_release+0x157/0x2d0 [ 41.637383][ T3605] ? dmabuffs_dname+0x240/0x240 [ 41.642400][ T3605] __dentry_kill+0x42b/0x640 [ 41.646984][ T3605] ? dput+0x35/0xdb0 [ 41.650867][ T3605] ? dput+0x35/0xdb0 [ 41.654744][ T3605] dput+0x806/0xdb0 [ 41.658543][ T3605] __fput+0x39c/0x9d0 [ 41.662510][ T3605] task_work_run+0xdd/0x1a0 [ 41.666997][ T3605] do_exit+0xad5/0x29b0 [ 41.671240][ T3605] ? mm_update_next_owner+0x7a0/0x7a0 [ 41.676597][ T3605] ? _raw_spin_unlock_irq+0x1f/0x40 [ 41.681781][ T3605] ? _raw_spin_unlock_irq+0x1f/0x40 [ 41.686966][ T3605] do_group_exit+0xd2/0x2f0 [ 41.691540][ T3605] __x64_sys_exit_group+0x3a/0x50 [ 41.696549][ T3605] do_syscall_64+0x35/0xb0 [ 41.700955][ T3605] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 41.706837][ T3605] RIP: 0033:0x7ff519f2e0c9 [ 41.711234][ T3605] Code: Unable to access opcode bytes at RIP 0x7ff519f2e09f. [ 41.718580][ T3605] RSP: 002b:00007fff6b9e97e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 41.726975][ T3605] RAX: ffffffffffffffda RBX: 00007ff519fa9430 RCX: 00007ff519f2e0c9 [ 41.734943][ T3605] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 41.742996][ T3605] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000000 [ 41.750962][ T3605] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff519fa9430 [ 41.759009][ T3605] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 41.767147][ T3605] [ 41.770151][ T3605] Modules linked in: [ 41.777179][ T3605] ---[ end trace 0000000000000000 ]--- [ 41.783084][ T3605] RIP: 0010:release_udmabuf+0xcb/0x4f0 [ 41.788893][ T3605] 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 [ 41.809013][ T3605] RSP: 0018:ffffc90003a7fc58 EFLAGS: 00010256 [ 41.815098][ T3605] RAX: dffffc0000000000 RBX: ffffffff8cb681e0 RCX: 0000000000000000 [ 41.823545][ T3605] RDX: 0000000000000000 RSI: ffffffff84ada4e0 RDI: 0000000000000000 [ 41.831859][ T3605] RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 [ 41.839895][ T3605] R10: 0000000000000000 R11: 000000000008c07c R12: ffff88801e7e8000 [ 41.847969][ T3605] R13: ffff888074429698 R14: ffff8880273eadc0 R15: 0000000000000000 [ 41.848450][ T8] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 41.855947][ T3605] FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 [ 41.875244][ T3605] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.882602][ T3605] CR2: 00007f27b98f8300 CR3: 0000000027202000 CR4: 0000000000350ef0 [ 41.891398][ T3605] Kernel panic - not syncing: Fatal exception [ 41.898132][ T3605] Kernel Offset: disabled [ 41.902445][ T3605] Rebooting in 86400 seconds..