./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3536298709 <...> Warning: Permanently added '10.128.0.125' (ED25519) to the list of known hosts. execve("./syz-executor3536298709", ["./syz-executor3536298709"], 0x7ffe612fa0e0 /* 10 vars */) = 0 brk(NULL) = 0x555556d65000 brk(0x555556d65d00) = 0x555556d65d00 arch_prctl(ARCH_SET_FS, 0x555556d65380) = 0 set_tid_address(0x555556d65650) = 356 set_robust_list(0x555556d65660, 24) = 0 rseq(0x555556d65ca0, 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-executor3536298709", 4096) = 28 getrandom("\x6f\xf5\x97\x64\xa1\x29\x77\x5a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556d65d00 brk(0x555556d86d00) = 0x555556d86d00 brk(0x555556d87000) = 0x555556d87000 mprotect(0x7ff5f69a0000, 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 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff5ee4ee000 write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 munmap(0x7ff5ee4ee000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 24.281118][ T23] audit: type=1400 audit(1708855507.530:66): avc: denied { execmem } for pid=356 comm="syz-executor353" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.301281][ T23] audit: type=1400 audit(1708855507.540:67): avc: denied { read write } for pid=356 comm="syz-executor353" name="loop0" dev="devtmpfs" ino=9327 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.325341][ T23] audit: type=1400 audit(1708855507.540:68): avc: denied { open } for pid=356 comm="syz-executor353" path="/dev/loop0" dev="devtmpfs" ino=9327 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.349458][ T23] audit: type=1400 audit(1708855507.540:69): avc: denied { ioctl } for pid=356 comm="syz-executor353" path="/dev/loop0" dev="devtmpfs" ino=9327 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 close(4) = 0 mkdir("./file0", 0777) = 0 [ 24.416662][ T23] audit: type=1400 audit(1708855507.670:70): avc: denied { mounton } for pid=356 comm="syz-executor353" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 mount("/dev/loop0", "./file0", "ext4", MS_DIRSYNC|MS_NOATIME|MS_LAZYTIME, ",errors=continue") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 creat("./bus", 000) = 4 fcntl(4, F_SETFL, O_RDONLY|O_NOCTTY|O_DIRECT|FASYNC) = 0 open("./bus", O_RDWR|O_CREAT|O_SYNC|O_NOATIME|FASYNC, 000) = 5 open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_DIRECT|O_NOFOLLOW|O_NOATIME, 000) = 6 pwritev2(6, [{iov_base="\x85\x2f\x62\x75\x73\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., iov_len=483840}], 1, 31744, RWF_HIPRI|RWF_DSYNC) = 483840 write(4, "\x74\x68\x72\x65\x61\x64\x65\x64\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x00\x00\x00\x00\x00\x62\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 392007683) = -1 EINVAL (Invalid argument) [ 24.486685][ T356] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 24.495593][ T23] audit: type=1400 audit(1708855507.750:71): avc: denied { mount } for pid=356 comm="syz-executor353" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 24.511295][ T356] ------------[ cut here ]------------ [ 24.518513][ T23] audit: type=1400 audit(1708855507.750:72): avc: denied { write } for pid=356 comm="syz-executor353" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.522479][ T356] kernel BUG at fs/ext4/inode.c:2844! [ 24.544432][ T23] audit: type=1400 audit(1708855507.750:73): avc: denied { add_name } for pid=356 comm="syz-executor353" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.549757][ T356] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 24.570596][ T23] audit: type=1400 audit(1708855507.750:74): avc: denied { create } for pid=356 comm="syz-executor353" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 24.575846][ T356] CPU: 1 PID: 356 Comm: syz-executor353 Not tainted 5.4.265-syzkaller-00001-g1b3143b9b166 #0 [ 24.575851][ T356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 24.575873][ T356] RIP: 0010:ext4_writepages+0x3c96/0x3cc0 [ 24.596101][ T23] audit: type=1400 audit(1708855507.760:75): avc: denied { write open } for pid=356 comm="syz-executor353" path="/root/file0/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 24.605877][ T356] Code: d2 9b ff 31 ff 89 de e8 e8 d2 9b ff 45 84 f6 75 2e e8 ce d0 9b ff 49 bf 00 00 00 00 00 fc ff df e9 1d f9 ff ff e8 ba d0 9b ff <0f> 0b e8 b3 d0 9b ff 0f 0b e8 ac d0 9b ff e8 27 de 37 ff eb 99 e8 [ 24.605884][ T356] RSP: 0018:ffff8881db8a73e0 EFLAGS: 00010293 [ 24.605902][ T356] RAX: ffffffff81c87606 RBX: 0000010000000000 RCX: ffff8881dbf0bf00 [ 24.677585][ T356] RDX: 0000000000000000 RSI: 0000010000000000 RDI: 0000000000000000 [ 24.685549][ T356] RBP: ffff8881db8a77d0 R08: ffffffff81c84256 R09: ffffed103cf2729f [ 24.693458][ T356] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e79395a0 [ 24.701435][ T356] R13: 0000000000000001 R14: 0000010410000000 R15: dffffc0000000000 [ 24.709257][ T356] FS: 0000555556d65380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.718255][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.724677][ T356] CR2: 000055e066495000 CR3: 00000001dbcf7000 CR4: 00000000003406a0 [ 24.732486][ T356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.740294][ T356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.748115][ T356] Call Trace: [ 24.751239][ T356] ? __die+0xb4/0x100 [ 24.755060][ T356] ? die+0x26/0x50 [ 24.758608][ T356] ? do_trap+0x1e7/0x340 [ 24.762866][ T356] ? ext4_writepages+0x3c96/0x3cc0 [ 24.767819][ T356] ? ext4_writepages+0x3c96/0x3cc0 [ 24.772770][ T356] ? do_invalid_op+0xfb/0x110 [ 24.777282][ T356] ? ext4_writepages+0x3c96/0x3cc0 [ 24.782215][ T356] ? invalid_op+0x1e/0x30 [ 24.786400][ T356] ? ext4_writepages+0x8e6/0x3cc0 [ 24.791243][ T356] ? ext4_writepages+0x3c96/0x3cc0 [ 24.796205][ T356] ? ext4_writepages+0x3c96/0x3cc0 [ 24.801293][ T356] ? write_boundary_block+0x150/0x150 [ 24.806489][ T356] ? __getblk_gfp+0x3a/0x720 [ 24.810915][ T356] ? domain_dirty_limits+0x2d6/0x4a0 [ 24.816050][ T356] ? balance_dirty_pages+0x234e/0x26f0 [ 24.821342][ T356] ? ext4_readpage+0x2e0/0x2e0 [ 24.825933][ T356] ? balance_dirty_pages_ratelimited+0xcc0/0xcc0 [ 24.832100][ T356] ? ext4_mark_inode_dirty+0x4e7/0x7a0 [ 24.837398][ T356] ? ext4_readpage+0x2e0/0x2e0 [ 24.841992][ T356] do_writepages+0x12b/0x270 [ 24.846414][ T356] ? __writepage+0x110/0x110 [ 24.850840][ T356] ? _raw_spin_lock+0xa4/0x1b0 [ 24.855442][ T356] ? _raw_spin_unlock+0x49/0x60 [ 24.860126][ T356] ? wbc_attach_and_unlock_inode+0x3a1/0x5b0 [ 24.865949][ T356] __filemap_fdatawrite_range+0x33c/0x3f0 [ 24.871518][ T356] ? filemap_check_errors+0x130/0x130 [ 24.876803][ T356] ? generic_perform_write+0x4c8/0x560 [ 24.882100][ T356] file_write_and_wait_range+0x83/0x110 [ 24.887620][ T356] __generic_file_fsync+0x6e/0x190 [ 24.892532][ T356] ext4_sync_file+0x251/0xcc0 [ 24.897027][ T356] ext4_file_write_iter+0xa03/0x10e0 [ 24.902154][ T356] ? ext4_file_read_iter+0x140/0x140 [ 24.907350][ T356] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 24.912384][ T356] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.918072][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 24.923346][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 24.928554][ T356] ? cgroup_leave_frozen+0x13c/0x290 [ 24.933673][ T356] ? iov_iter_init+0x82/0x160 [ 24.938184][ T356] __vfs_write+0x5d3/0x750 [ 24.942542][ T356] ? __kernel_write+0x350/0x350 [ 24.947312][ T356] ? check_preemption_disabled+0x9f/0x320 [ 24.952866][ T356] ? debug_smp_processor_id+0x20/0x20 [ 24.958088][ T356] ? selinux_file_permission+0x2be/0x530 [ 24.963705][ T356] vfs_write+0x206/0x4e0 [ 24.967779][ T356] ksys_write+0x199/0x2c0 [ 24.972028][ T356] ? do_syscall_64+0x1c0/0x1c0 [ 24.976735][ T356] ? __ia32_sys_read+0x80/0x80 [ 24.981331][ T356] ? security_file_fcntl+0x7d/0xa0 [ 24.986281][ T356] do_syscall_64+0xca/0x1c0 [ 24.990628][ T356] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.996345][ T356] Modules linked in: [ 25.000224][ T356] ---[ end trace cb42aedb9f0d253a ]--- [ 25.005747][ T356] RIP: 0010:ext4_writepages+0x3c96/0x3cc0 [ 25.011255][ T356] Code: d2 9b ff 31 ff 89 de e8 e8 d2 9b ff 45 84 f6 75 2e e8 ce d0 9b ff 49 bf 00 00 00 00 00 fc ff df e9 1d f9 ff ff e8 ba d0 9b ff <0f> 0b e8 b3 d0 9b ff 0f 0b e8 ac d0 9b ff e8 27 de 37 ff eb 99 e8 [ 25.030830][ T356] RSP: 0018:ffff8881db8a73e0 EFLAGS: 00010293 [ 25.036720][ T356] RAX: ffffffff81c87606 RBX: 0000010000000000 RCX: ffff8881dbf0bf00 [ 25.044739][ T356] RDX: 0000000000000000 RSI: 0000010000000000 RDI: 0000000000000000 [ 25.052672][ T356] RBP: ffff8881db8a77d0 R08: ffffffff81c84256 R09: ffffed103cf2729f [ 25.060514][ T356] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e79395a0 [ 25.068299][ T356] R13: 0000000000000001 R14: 0000010410000000 R15: dffffc0000000000 [ 25.076225][ T356] FS: 0000555556d65380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 25.084978][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.091568][ T356] CR2: 000055e066495000 CR3: 00000001dbcf7000 CR4: 00000000003406a0 [ 25.099414][ T356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.107209][ T356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.115033][ T356] Kernel panic - not syncing: Fatal exception [ 25.121128][ T356] Kernel Offset: disabled [ 25.125251][ T356] Rebooting in 86400 seconds..