./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor470263559 <...> Warning: Permanently added '10.128.0.247' (ED25519) to the list of known hosts. execve("./syz-executor470263559", ["./syz-executor470263559"], 0x7ffde073e5f0 /* 10 vars */) = 0 brk(NULL) = 0x55555646f000 brk(0x55555646fd00) = 0x55555646fd00 arch_prctl(ARCH_SET_FS, 0x55555646f380) = 0 set_tid_address(0x55555646f650) = 355 set_robust_list(0x55555646f660, 24) = 0 rseq(0x55555646fca0, 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-executor470263559", 4096) = 27 getrandom("\x1f\x89\x30\xd9\xb8\xe0\x06\x21", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555646fd00 brk(0x555556490d00) = 0x555556490d00 brk(0x555556491000) = 0x555556491000 mprotect(0x7faba94cc000, 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) = 0x7faba101a000 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(0x7faba101a000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 21.897868][ T23] audit: type=1400 audit(1708826001.590:66): avc: denied { execmem } for pid=355 comm="syz-executor470" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.917099][ T23] audit: type=1400 audit(1708826001.600:67): avc: denied { read write } for pid=355 comm="syz-executor470" name="loop0" dev="devtmpfs" ino=36 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 [ 21.941077][ T23] audit: type=1400 audit(1708826001.600:68): avc: denied { open } for pid=355 comm="syz-executor470" path="/dev/loop0" dev="devtmpfs" ino=36 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.965146][ T23] audit: type=1400 audit(1708826001.600:69): avc: denied { ioctl } for pid=355 comm="syz-executor470" path="/dev/loop0" dev="devtmpfs" ino=36 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 22.011911][ T23] audit: type=1400 audit(1708826001.700:70): avc: denied { mounton } for pid=355 comm="syz-executor470" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 22.039154][ T355] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue 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) [ 22.048014][ T23] audit: type=1400 audit(1708826001.740:71): avc: denied { mount } for pid=355 comm="syz-executor470" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 22.080274][ T23] audit: type=1400 audit(1708826001.770:72): avc: denied { write } for pid=355 comm="syz-executor470" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 22.084134][ T355] ------------[ cut here ]------------ [ 22.102622][ T23] audit: type=1400 audit(1708826001.770:73): avc: denied { add_name } for pid=355 comm="syz-executor470" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 22.107773][ T355] kernel BUG at fs/ext4/inode.c:2844! [ 22.108113][ T355] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 22.128573][ T23] audit: type=1400 audit(1708826001.770:74): avc: denied { create } for pid=355 comm="syz-executor470" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 22.133463][ T355] CPU: 1 PID: 355 Comm: syz-executor470 Not tainted 5.4.265-syzkaller-00001-g1b3143b9b166 #0 [ 22.139498][ T23] audit: type=1400 audit(1708826001.770:75): avc: denied { write open } for pid=355 comm="syz-executor470" path="/root/file0/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 22.159439][ T355] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 22.159455][ T355] RIP: 0010:ext4_writepages+0x3c96/0x3cc0 [ 22.159463][ T355] 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 [ 22.159467][ T355] RSP: 0018:ffff8881dbf5f3e0 EFLAGS: 00010293 [ 22.159481][ T355] RAX: ffffffff81c87606 RBX: 0000010000000000 RCX: ffff8881dc3c8fc0 [ 22.241161][ T355] RDX: 0000000000000000 RSI: 0000010000000000 RDI: 0000000000000000 [ 22.248968][ T355] RBP: ffff8881dbf5f7d0 R08: ffffffff81c84256 R09: ffffed103d1a2155 [ 22.256809][ T355] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e8d10b50 [ 22.264587][ T355] R13: 0000000000000001 R14: 0000010410000000 R15: dffffc0000000000 [ 22.272403][ T355] FS: 000055555646f380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.281165][ T355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.287591][ T355] CR2: 00007fff850c1358 CR3: 00000001dbe9e000 CR4: 00000000003406a0 [ 22.295407][ T355] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.303222][ T355] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.311027][ T355] Call Trace: [ 22.314158][ T355] ? __die+0xb4/0x100 [ 22.317965][ T355] ? die+0x26/0x50 [ 22.321523][ T355] ? do_trap+0x1e7/0x340 [ 22.325605][ T355] ? ext4_writepages+0x3c96/0x3cc0 [ 22.330553][ T355] ? ext4_writepages+0x3c96/0x3cc0 [ 22.335499][ T355] ? do_invalid_op+0xfb/0x110 [ 22.340010][ T355] ? ext4_writepages+0x3c96/0x3cc0 [ 22.344959][ T355] ? invalid_op+0x1e/0x30 [ 22.349128][ T355] ? ext4_writepages+0x8e6/0x3cc0 [ 22.353984][ T355] ? ext4_writepages+0x3c96/0x3cc0 [ 22.358931][ T355] ? ext4_writepages+0x3c96/0x3cc0 [ 22.363881][ T355] ? write_boundary_block+0x150/0x150 [ 22.369096][ T355] ? __getblk_gfp+0x3a/0x720 [ 22.373515][ T355] ? domain_dirty_limits+0x2d6/0x4a0 [ 22.378632][ T355] ? balance_dirty_pages+0x234e/0x26f0 [ 22.383939][ T355] ? ext4_readpage+0x2e0/0x2e0 [ 22.388532][ T355] ? balance_dirty_pages_ratelimited+0xcc0/0xcc0 [ 22.394691][ T355] ? ext4_mark_inode_dirty+0x4e7/0x7a0 [ 22.399984][ T355] ? ext4_readpage+0x2e0/0x2e0 [ 22.404600][ T355] do_writepages+0x12b/0x270 [ 22.409015][ T355] ? __writepage+0x110/0x110 [ 22.413445][ T355] ? _raw_spin_lock+0xa4/0x1b0 [ 22.418042][ T355] ? _raw_spin_unlock+0x49/0x60 [ 22.422727][ T355] ? wbc_attach_and_unlock_inode+0x3a1/0x5b0 [ 22.428556][ T355] __filemap_fdatawrite_range+0x33c/0x3f0 [ 22.434097][ T355] ? filemap_check_errors+0x130/0x130 [ 22.439300][ T355] ? generic_perform_write+0x4c8/0x560 [ 22.444598][ T355] file_write_and_wait_range+0x83/0x110 [ 22.449980][ T355] __generic_file_fsync+0x6e/0x190 [ 22.454926][ T355] ext4_sync_file+0x251/0xcc0 [ 22.459436][ T355] ext4_file_write_iter+0xa03/0x10e0 [ 22.464562][ T355] ? ext4_file_read_iter+0x140/0x140 [ 22.469680][ T355] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 22.474802][ T355] ? _raw_spin_lock_irqsave+0x210/0x210 [ 22.480199][ T355] ? cgroup_update_frozen+0x157/0xab0 [ 22.485391][ T355] ? cgroup_update_frozen+0x157/0xab0 [ 22.490600][ T355] ? cgroup_leave_frozen+0x13c/0x290 [ 22.495716][ T355] ? iov_iter_init+0x82/0x160 [ 22.500230][ T355] __vfs_write+0x5d3/0x750 [ 22.504484][ T355] ? __kernel_write+0x350/0x350 [ 22.509171][ T355] ? check_preemption_disabled+0x9f/0x320 [ 22.514722][ T355] ? debug_smp_processor_id+0x20/0x20 [ 22.519930][ T355] ? selinux_file_permission+0x2be/0x530 [ 22.525402][ T355] vfs_write+0x206/0x4e0 [ 22.529481][ T355] ksys_write+0x199/0x2c0 [ 22.533647][ T355] ? do_syscall_64+0x1c0/0x1c0 [ 22.538249][ T355] ? __ia32_sys_read+0x80/0x80 [ 22.542842][ T355] ? security_file_fcntl+0x7d/0xa0 [ 22.547792][ T355] do_syscall_64+0xca/0x1c0 [ 22.552130][ T355] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 22.557875][ T355] Modules linked in: [ 22.561682][ T355] ---[ end trace 2e131d17a6dee42d ]--- [ 22.566902][ T355] RIP: 0010:ext4_writepages+0x3c96/0x3cc0 [ 22.572473][ T355] 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 [ 22.591927][ T355] RSP: 0018:ffff8881dbf5f3e0 EFLAGS: 00010293 [ 22.597798][ T355] RAX: ffffffff81c87606 RBX: 0000010000000000 RCX: ffff8881dc3c8fc0 [ 22.605593][ T355] RDX: 0000000000000000 RSI: 0000010000000000 RDI: 0000000000000000 [ 22.613430][ T355] RBP: ffff8881dbf5f7d0 R08: ffffffff81c84256 R09: ffffed103d1a2155 [ 22.621233][ T355] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881e8d10b50 [ 22.629051][ T355] R13: 0000000000000001 R14: 0000010410000000 R15: dffffc0000000000 [ 22.636842][ T355] FS: 000055555646f380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.645635][ T355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.652051][ T355] CR2: 00007fff850c1358 CR3: 00000001dbe9e000 CR4: 00000000003406a0 [ 22.659868][ T355] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.667679][ T355] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.675594][ T355] Kernel panic - not syncing: Fatal exception [ 22.681655][ T355] Kernel Offset: disabled [ 22.685774][ T355] Rebooting in 86400 seconds..