./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor695865721 <...> Warning: Permanently added '10.128.1.26' (ED25519) to the list of known hosts. execve("./syz-executor695865721", ["./syz-executor695865721"], 0x7ffc99d33ff0 /* 10 vars */) = 0 brk(NULL) = 0x55558b167000 brk(0x55558b167e00) = 0x55558b167e00 arch_prctl(ARCH_SET_FS, 0x55558b167480) = 0 set_tid_address(0x55558b167750) = 298 set_robust_list(0x55558b167760, 24) = 0 rseq(0x55558b167da0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor695865721", 4096) = 27 getrandom("\x23\x06\x5d\x7d\xac\x2e\xe5\x8d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558b167e00 brk(0x55558b188e00) = 0x55558b188e00 brk(0x55558b189000) = 0x55558b189000 mprotect(0x7f58b577d000, 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 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=0x7f58b56d3000, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f58b56db7d0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f58b56d3000, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f58b56db7d0}, NULL, 8) = 0 mkdir("./syzkaller.rlkvAp", 0700) = 0 chmod("./syzkaller.rlkvAp", 0777) = 0 chdir("./syzkaller.rlkvAp") = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55558b167750) = 299 ./strace-static-x86_64: Process 299 attached [pid 299] set_robust_list(0x55558b167760, 24) = 0 [pid 299] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 299] setsid() = 1 [pid 299] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 299] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 299] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 299] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 299] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 299] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 299] unshare(CLONE_NEWNS) = 0 [pid 299] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 299] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 299] unshare(CLONE_NEWCGROUP) = 0 [pid 299] unshare(CLONE_NEWUTS) = 0 [pid 299] unshare(CLONE_SYSVSEM) = 0 [pid 299] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 299] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 299] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 299] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 299] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 299] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 299] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 299] getpid() = 1 [pid 299] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b e8 53 6c 87 ff e8 aa 9c 17 ff eb 9b e8 47 6c 87 ff e8 9e 9c [ 26.181153][ T8] RSP: 0018:ffffc90000087000 EFLAGS: 00010293 [ 26.187044][ T8] RAX: ffffffff81e8eb26 RBX: 0000008000000000 RCX: ffff88810026cf00 [ 26.194856][ T8] RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000 [ 26.202842][ T8] RBP: ffffc90000087410 R08: ffffffff81e8e296 R09: ffffed1024523814 [ 26.210660][ T8] R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900000877d0 [ 26.218462][ T8] R13: 0000000000000000 R14: 0000008410000000 R15: 0000000000000001 [ 26.226274][ T8] FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 26.235144][ T8] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.241565][ T8] CR2: 0000000000000002 CR3: 0000000006a0f000 CR4: 00000000003506a0 [ 26.249461][ T8] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.257271][ T8] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.265083][ T8] Call Trace: [ 26.268206][ T8] [ 26.270986][ T8] ? __die_body+0x62/0xb0 [ 26.275150][ T8] ? die+0x88/0xb0 [ 26.278707][ T8] ? do_trap+0x103/0x330 [ 26.282788][ T8] ? ext4_writepages+0x3fe6/0x4000 [ 26.287733][ T8] ? handle_invalid_op+0x95/0xc0 [ 26.292516][ T8] ? ext4_writepages+0x3fe6/0x4000 [ 26.297458][ T8] ? exc_invalid_op+0x32/0x50 [ 26.301969][ T8] ? asm_exc_invalid_op+0x1b/0x20 [ 26.306830][ T8] ? ext4_writepages+0x3756/0x4000 [ 26.311779][ T8] ? ext4_writepages+0x3fe6/0x4000 [ 26.316731][ T8] ? ext4_writepages+0x3fe6/0x4000 [ 26.321679][ T8] ? yield_to_task_fair+0x190/0x190 [ 26.326704][ T8] ? load_balance+0x1c3c/0x6d60 [ 26.331388][ T8] ? load_balance+0x1c3c/0x6d60 [ 26.336079][ T8] ? ext4_readpage+0x230/0x230 [ 26.340678][ T8] ? __kasan_check_write+0x14/0x20 [ 26.345623][ T8] ? cpumask_next_and+0xa8/0xd0 [ 26.350309][ T8] ? ext4_readpage+0x230/0x230 [ 26.354909][ T8] do_writepages+0x40e/0x670 [ 26.359338][ T8] ? __writepage+0x130/0x130 [ 26.363763][ T8] ? _raw_spin_lock+0x1b0/0x1b0 [ 26.368625][ T8] ? percpu_counter_add_batch+0x13d/0x160 [ 26.374184][ T8] ? _raw_spin_unlock_irqrestore+0x5c/0x80 [ 26.379822][ T8] __writeback_single_inode+0xdf/0xa70 [ 26.385115][ T8] writeback_sb_inodes+0xb2a/0x1920 [ 26.390148][ T8] ? _raw_spin_lock+0xa4/0x1b0 [ 26.394748][ T8] ? queue_io+0x520/0x520 [ 26.398915][ T8] ? __writeback_inodes_wb+0x3f0/0x3f0 [ 26.404210][ T8] ? queue_io+0x3d0/0x520 [ 26.408383][ T8] wb_writeback+0x3b9/0x9e0 [ 26.412717][ T8] ? inode_cgwb_move_to_attached+0x3c0/0x3c0 [ 26.418594][ T8] ? set_worker_desc+0x158/0x1c0 [ 26.423301][ T8] ? __update_load_avg_cfs_rq+0xb1/0x2f0 [ 26.428769][ T8] ? __kasan_check_write+0x14/0x20 [ 26.433719][ T8] wb_workfn+0x3d9/0x1110 [ 26.437886][ T8] ? inode_wait_for_writeback+0x280/0x280 [ 26.443698][ T8] ? sched_clock+0x9/0x10 [ 26.447867][ T8] ? _raw_spin_unlock+0x4d/0x70 [ 26.452549][ T8] ? finish_task_switch+0x167/0x7b0 [ 26.457590][ T8] ? __kasan_check_read+0x11/0x20 [ 26.462443][ T8] ? read_word_at_a_time+0x12/0x20 [ 26.467390][ T8] ? strscpy+0x9c/0x260 [ 26.471383][ T8] process_one_work+0x6bb/0xc10 [ 26.476071][ T8] worker_thread+0xad5/0x12a0 [ 26.480636][ T8] kthread+0x421/0x510 [ 26.484493][ T8] ? worker_clr_flags+0x180/0x180 [ 26.489352][ T8] ? kthread_blkcg+0xd0/0xd0 [ 26.493777][ T8] ret_from_fork+0x1f/0x30 [ 26.498042][ T8] [ 26.500891][ T8] Modules linked in: [ 26.504835][ T8] ---[ end trace b83334485f6c4da4 ]--- [ 26.510147][ T8] RIP: 0010:ext4_writepages+0x3fe6/0x4000 [ 26.515649][ T8] Code: 89 de e8 0d 6f 87 ff 45 84 f6 75 2c e8 73 6c 87 ff 49 be 00 00 00 00 00 fc ff df 4c 8b 64 24 50 e9 e4 c5 ff ff e8 5a 6c 87 ff <0f> 0b e8 53 6c 87 ff e8 aa 9c 17 ff eb 9b e8 47 6c 87 ff e8 9e 9c [ 26.535164][ T8] RSP: 0018:ffffc90000087000 EFLAGS: 00010293 [ 26.541021][ T8] RAX: ffffffff81e8eb26 RBX: 0000008000000000 RCX: ffff88810026cf00 [ 26.548845][ T8] RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000 [ 26.556692][ T8] RBP: ffffc90000087410 R08: ffffffff81e8e296 R09: ffffed1024523814 [ 26.564423][ T8] R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900000877d0 [ 26.572295][ T8] R13: 0000000000000000 R14: 0000008410000000 R15: 0000000000000001 [ 26.580207][ T8] FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 26.588993][ T8] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.595385][ T8] CR2: 0000000000000002 CR3: 0000000006a0f000 CR4: 00000000003506a0 [ 26.603216][ T8] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.611022][ T8] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.618848][ T8] Kernel panic - not syncing: Fatal exception [ 26.624939][ T8] Kernel Offset: disabled [ 26.629062][ T8] Rebooting in 86400 seconds..