./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1709231817 <...> forked to background, child pid 4647 [ 30.213649][ T4648] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.228151][ T4648] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: [ 30.678674][ T4739] sshd (4739) used greatest stack depth: 15824 bytes left OK syzkaller Warning: Permanently added '10.128.0.179' (ECDSA) to the list of known hosts. execve("./syz-executor1709231817", ["./syz-executor1709231817"], 0x7ffffd5733f0 /* 10 vars */) = 0 brk(NULL) = 0x555556536000 brk(0x555556536c40) = 0x555556536c40 arch_prctl(ARCH_SET_FS, 0x555556536300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1709231817", 4096) = 28 brk(0x555556557c40) = 0x555556557c40 brk(0x555556558000) = 0x555556558000 mprotect(0x7fd5f599b000, 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) = 0x7fd5ed4e2000 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"..., 262144) = 262144 munmap(0x7fd5ed4e2000, 262144) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 syzkaller login: [ 50.332333][ T5069] loop0: detected capacity change from 0 to 512 [ 50.347255][ T5069] EXT4-fs error (device loop0): ext4_map_blocks:607: inode #2: block 2: comm syz-executor170: lblock 0 mapped to illegal pblock 2 (length 1) [ 50.362402][ T5069] Kernel panic - not syncing: EXT4-fs (device loop0): panic forced after error [ 50.371334][ T5069] CPU: 1 PID: 5069 Comm: syz-executor170 Not tainted 6.1.0-syzkaller-14594-g72a85e2b0a1e #0 [ 50.381377][ T5069] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 50.391415][ T5069] Call Trace: [ 50.394684][ T5069] [ 50.397600][ T5069] dump_stack_lvl+0x1b1/0x290 [ 50.402280][ T5069] ? seqcount_lockdep_reader_access+0x13a/0x1f0 [ 50.408506][ T5069] ? nf_tcp_handle_invalid+0x630/0x630 [ 50.413953][ T5069] ? panic+0x710/0x710 [ 50.418008][ T5069] ? vscnprintf+0x59/0x80 [ 50.422410][ T5069] panic+0x2d6/0x710 [ 50.426289][ T5069] ? __might_sleep+0xc0/0xc0 [ 50.430953][ T5069] ? ext4_handle_error+0x655/0x8a0 [ 50.436055][ T5069] ? memcpy_page_flushcache+0x100/0x100 [ 50.441588][ T5069] ? ext4_commit_super+0x3cf/0x4a0 [ 50.446686][ T5069] ext4_handle_error+0x848/0x8a0 [ 50.451617][ T5069] __ext4_error_inode+0x2e1/0x4c0 [ 50.456635][ T5069] ? ext4_handle_error+0x8a0/0x8a0 [ 50.461734][ T5069] ? __up_read+0x251/0x690 [ 50.466146][ T5069] ext4_map_blocks+0xadf/0x1cc0 [ 50.470997][ T5069] ? __stack_depot_save+0x41c/0x4a0 [ 50.476180][ T5069] ? ext4_issue_zeroout+0x260/0x260 [ 50.481369][ T5069] ? mark_lock+0x9a/0x350 [ 50.485702][ T5069] ext4_getblk+0x1b9/0x770 [ 50.490111][ T5069] ? ext4_get_block_unwritten+0x30/0x30 [ 50.495652][ T5069] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 50.501538][ T5069] ? _raw_spin_unlock+0x40/0x40 [ 50.506407][ T5069] ext4_bread+0x2a/0x170 [ 50.510640][ T5069] __ext4_read_dirblock+0xc9/0x890 [ 50.515750][ T5069] dx_probe+0xb7/0x1590 [ 50.519903][ T5069] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.525522][ T5069] ? htree_dirblock_to_tree+0x1080/0x1080 [ 50.531235][ T5069] __ext4_find_entry+0x599/0x1ba0 [ 50.536245][ T5069] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 50.542217][ T5069] ? ext4_ci_compare+0x660/0x660 [ 50.547148][ T5069] ? ext4_fname_setup_filename+0x2a0/0x2a0 [ 50.552940][ T5069] ? __d_lookup_rcu+0x3c3/0x4c0 [ 50.557778][ T5069] ? do_raw_spin_unlock+0x134/0x8a0 [ 50.562971][ T5069] ext4_lookup+0x11c/0x690 [ 50.567376][ T5069] ? lockdep_init_map_type+0x9d/0x890 [ 50.572733][ T5069] ? ext4_add_entry+0xeb0/0xeb0 [ 50.577574][ T5069] ? __init_waitqueue_head+0xa6/0x140 [ 50.582932][ T5069] __lookup_slow+0x266/0x3a0 [ 50.587526][ T5069] ? lookup_one_len+0x690/0x690 [ 50.592455][ T5069] ? __down_read_common+0x156/0x2a0 [ 50.597640][ T5069] lookup_one_unlocked+0x3f8/0x670 [ 50.602739][ T5069] ? lookup_one+0x6c0/0x6c0 [ 50.607233][ T5069] ? ext4_init_orphan_info+0x162/0x10b0 [ 50.612765][ T5069] lookup_positive_unlocked+0x27/0xb0 [ 50.618132][ T5069] dquot_quota_on_mount+0x56/0xe0 [ 50.623144][ T5069] ext4_orphan_cleanup+0x687/0x1340 [ 50.628329][ T5069] ? ext4_orphan_file_block_trigger+0x500/0x500 [ 50.634555][ T5069] ? ext4_orphan_del+0xc20/0xc20 [ 50.639472][ T5069] ? __init_swait_queue_head+0xa6/0x140 [ 50.645003][ T5069] ? errseq_check_and_advance+0x5e/0x110 [ 50.650625][ T5069] ext4_fill_super+0x81cd/0x8700 [ 50.655566][ T5069] ? ext4_parse_test_dummy_encryption+0xb0/0xb0 [ 50.661791][ T5069] ? snprintf+0xc0/0x110 [ 50.666023][ T5069] ? set_blocksize+0x1ec/0x390 [ 50.670775][ T5069] ? sb_set_blocksize+0x95/0xf0 [ 50.675612][ T5069] get_tree_bdev+0x400/0x620 [ 50.680190][ T5069] ? ext4_parse_test_dummy_encryption+0xb0/0xb0 [ 50.686426][ T5069] vfs_get_tree+0x88/0x270 [ 50.690826][ T5069] do_new_mount+0x289/0xad0 [ 50.695314][ T5069] ? do_move_mount_old+0x150/0x150 [ 50.700415][ T5069] ? user_path_at_empty+0x149/0x1a0 [ 50.705612][ T5069] __se_sys_mount+0x2d3/0x3c0 [ 50.710292][ T5069] ? __x64_sys_mount+0xc0/0xc0 [ 50.715039][ T5069] ? syscall_enter_from_user_mode+0x2e/0x1d0 [ 50.721006][ T5069] ? __x64_sys_mount+0x1c/0xc0 [ 50.725753][ T5069] do_syscall_64+0x3d/0xb0 [ 50.730157][ T5069] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 50.736035][ T5069] RIP: 0033:0x7fd5f592fbca [ 50.740437][ T5069] Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 50.760028][ T5069] RSP: 002b:00007ffcfa196b78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 50.768426][ T5069] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd5f592fbca [ 50.776381][ T5069] RDX: 0000000020000440 RSI: 0000000020000480 RDI: 00007ffcfa196b90 [ 50.784343][ T5069] RBP: 00007ffcfa196b90 R08: 00007ffcfa196bd0 R09: 0000000000000474 [ 50.792324][ T5069] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004 [ 50.800289][ T5069] R13: 00005555565362c0 R14: 0000000000000000 R15: 00007ffcfa196bd0 [ 50.808263][ T5069] [ 50.811443][ T5069] Kernel Offset: disabled [ 50.815825][ T5069] Rebooting in 86400 seconds..