Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.145' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.174515] BTRFS: device fsid 24c7a497-3402-47dd-bef8-82358f5f30e0 devid 1 transid 8 /dev/loop0 [ 33.195307] BTRFS info (device loop0): enabling inode map caching [ 33.205140] BTRFS info (device loop0): force clearing of disk cache [ 33.211698] BTRFS info (device loop0): disabling free space tree [ 33.217883] BTRFS info (device loop0): has skinny extents [ 33.261447] BTRFS info (device loop0): clearing free space tree [ 33.267837] BTRFS info (device loop0): clearing 1 ro feature flag [ 33.275211] BTRFS info (device loop0): clearing 2 ro feature flag [ 33.287872] BTRFS info (device loop0): checking UUID tree [ 33.311656] FAULT_INJECTION: forcing a failure. [ 33.311656] name failslab, interval 1, probability 0, space 0, times 1 [ 33.323399] CPU: 1 PID: 8019 Comm: syz-executor393 Not tainted 4.14.305-syzkaller #0 [ 33.331303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 33.340643] Call Trace: [ 33.343220] dump_stack+0x1b2/0x281 [ 33.346847] should_fail.cold+0x10a/0x149 [ 33.350998] should_failslab+0xd6/0x130 [ 33.354962] kmem_cache_alloc+0x28e/0x3c0 [ 33.359101] __btrfs_run_delayed_refs+0x260e/0x3d10 [ 33.364236] ? walk_down_tree+0x320/0x320 [ 33.368378] ? do_raw_spin_unlock+0x164/0x220 [ 33.372980] ? _raw_spin_unlock+0x29/0x40 [ 33.377138] ? commit_fs_roots+0x385/0x4d0 [ 33.381386] btrfs_run_delayed_refs+0x19f/0x630 [ 33.386053] ? _raw_spin_unlock+0x29/0x40 [ 33.390196] btrfs_commit_transaction+0x7ac/0x2210 [ 33.395199] ? btrfs_apply_pending_changes+0x100/0x100 [ 33.400680] ? lock_downgrade+0x740/0x740 [ 33.404834] ? btrfs_log_dentry_safe+0x7e/0xa0 [ 33.409413] btrfs_sync_file+0xad6/0xd90 [ 33.413476] ? prepare_pages+0x890/0x890 [ 33.417682] ? prepare_pages+0x890/0x890 [ 33.421751] vfs_fsync_range+0x103/0x260 [ 33.425803] ? SyS_read+0x210/0x210 [ 33.429417] ? __do_page_fault+0x159/0xad0 [ 33.433640] SyS_fsync+0x3a/0x80 [ 33.436996] ? SyS_syncfs+0xe0/0xe0 [ 33.440704] do_syscall_64+0x1d5/0x640 [ 33.444581] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 33.449756] RIP: 0033:0x7fc3906f02e9 [ 33.453453] RSP: 002b:00007fffbba5b7e8 EFLAGS: 00000246 ORIG_RAX: 000000000000004a [ 33.461146] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc3906f02e9 [ 33.468402] RDX: 0000000000000800 RSI: 000000000000c0fc RDI: 0000000000000005 [ 33.475671] RBP: 00007fffbba5b800 R08: 0000000000000002 R09: 00007fffbba5b780 [ 33.483097] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 [ 33.490371] R13: 00007fffbba5b910 R14: 431bde82d7b634db R15: 00007fffbba5b810 [ 33.508646] ------------[ cut here ]------------ [ 33.513557] WARNING: CPU: 1 PID: 8019 at fs/btrfs/extent-tree.c:3088 btrfs_run_delayed_refs.cold+0x14/0x37 [ 33.523438] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 33.523438] [ 33.531504] CPU: 1 PID: 8019 Comm: syz-executor393 Not tainted 4.14.305-syzkaller #0 [ 33.539383] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 [ 33.548720] Call Trace: [ 33.551302] dump_stack+0x1b2/0x281 [ 33.554918] panic+0x21d/0x451 [ 33.558101] ? add_taint.cold+0x16/0x16 [ 33.562080] ? log_store.cold+0x16/0x16 [ 33.566075] ? btrfs_run_delayed_refs.cold+0x14/0x37 [ 33.571162] check_panic_on_warn.cold+0x19/0x35 [ 33.575815] __warn+0xdf/0x1e0 [ 33.578996] ? ist_end_non_atomic+0x10/0x10 [ 33.583322] ? btrfs_run_delayed_refs.cold+0x14/0x37 [ 33.588411] report_bug+0x208/0x250 [ 33.592048] do_error_trap+0x195/0x2d0 [ 33.595923] ? math_error+0x2d0/0x2d0 [ 33.599723] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.604555] invalid_op+0x1b/0x40 [ 33.608641] RIP: 0010:btrfs_run_delayed_refs.cold+0x14/0x37 [ 33.614803] RSP: 0018:ffff888095d07bb0 EFLAGS: 00010286 [ 33.620155] RAX: 0000000000000026 RBX: dffffc0000000000 RCX: 0000000000000000 [ 33.627598] RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed1012ba0f6c [ 33.634853] RBP: ffff88808d361c38 R08: 0000000000000026 R09: 0000000000000000 [ 33.642107] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4 [ 33.649364] R13: ffff88808d361c98 R14: 0000000000000000 R15: ffff888099431d80 [ 33.656640] ? _raw_spin_unlock+0x29/0x40 [ 33.660779] btrfs_commit_transaction+0x7ac/0x2210 [ 33.665701] ? btrfs_apply_pending_changes+0x100/0x100 [ 33.670989] ? lock_downgrade+0x740/0x740 [ 33.675131] ? btrfs_log_dentry_safe+0x7e/0xa0 [ 33.679823] btrfs_sync_file+0xad6/0xd90 [ 33.683968] ? prepare_pages+0x890/0x890 [ 33.688046] ? prepare_pages+0x890/0x890 [ 33.692099] vfs_fsync_range+0x103/0x260 [ 33.696143] ? SyS_read+0x210/0x210 [ 33.699755] ? __do_page_fault+0x159/0xad0 [ 33.703976] SyS_fsync+0x3a/0x80 [ 33.707324] ? SyS_syncfs+0xe0/0xe0 [ 33.710936] do_syscall_64+0x1d5/0x640 [ 33.714813] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 33.720018] RIP: 0033:0x7fc3906f02e9 [ 33.723733] RSP: 002b:00007fffbba5b7e8 EFLAGS: 00000246 ORIG_RAX: 000000000000004a [ 33.731433] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc3906f02e9 [ 33.738697] RDX: 0000000000000800 RSI: 000000000000c0fc RDI: 0000000000000005 [ 33.745966] RBP: 00007fffbba5b800 R08: 0000000000000002 R09: 00007fffbba5b780 [ 33.753234] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 [ 33.760496] R13: 00007fffbba5b910 R14: 431bde82d7b634db R15: 00007fffbba5b810 [ 33.768232] Kernel Offset: disabled [ 33.771909] Rebooting in 86400 seconds..