name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 10436 Comm: syz-executor.1 Not tainted 4.19.188-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x17c/0x226 lib/dump_stack.c:118 BUG: Dentry 000000008edd584f{i=0,n=/} still in use (-128) [unmount of erofs loop4] fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.2+0x5/0xa lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x20 mm/slab_common.c:1588 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x28e/0x390 mm/slab.c:3557 alloc_inode+0x16/0x40 drivers/staging/erofs/super.c:49 alloc_inode+0x56/0x150 fs/inode.c:211 new_inode_pseudo+0xc/0xd0 fs/inode.c:911 new_inode+0x14/0x30 fs/inode.c:940 erofs_init_managed_cache drivers/staging/erofs/super.c:317 [inline] erofs_read_super drivers/staging/erofs/super.c:386 [inline] erofs_fill_super+0xd02/0x1168 drivers/staging/erofs/super.c:499 mount_bdev+0x26f/0x330 fs/super.c:1158 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 10440 at fs/dcache.c:1518 umount_check fs/dcache.c:1518 [inline] WARNING: CPU: 1 PID: 10440 at fs/dcache.c:1518 umount_check.cold.19+0xe0/0x149 fs/dcache.c:1499 erofs_mount+0x6a/0x90 drivers/staging/erofs/super.c:512 Kernel panic - not syncing: panic_on_warn set ... mount_fs+0x7f/0x2b0 fs/super.c:1261 vfs_kern_mount.part.11+0x58/0x3d0 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x376/0x2710 fs/namespace.c:2799 ksys_mount+0xb1/0xd0 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3026 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x466f7a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f51979a9fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000466f7a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f51979aa000 RBP: 00007f51979aa040 R08: 00007f51979aa040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f51979aa000 R15: 0000000020000040 CPU: 1 PID: 10440 Comm: syz-executor.4 Not tainted 4.19.188-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x17c/0x226 lib/dump_stack.c:118 panic+0x1cd/0x375 kernel/panic.c:186 __warn.cold.7+0x1b/0x36 kernel/panic.c:541 report_bug+0x1a1/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:umount_check fs/dcache.c:1518 [inline] RIP: 0010:umount_check.cold.19+0xe0/0x149 fs/dcache.c:1499 Code: 75 7f 49 8b 54 24 40 41 55 4d 89 f1 41 89 d8 48 89 f1 48 c7 c7 20 87 13 88 e8 b5 05 ff ff 48 c7 c7 60 86 13 88 e8 a9 05 ff ff <0f> 0b 58 e9 f1 68 17 fa 48 89 75 d8 e8 9c f3 08 fa 48 8b 75 d8 e9 RSP: 0018:ffff88807df3fa60 EFLAGS: 00010286 RAX: 0000000000000024 RBX: 00000000ffffff80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff88501cc0 RDI: ffffffff8bad9720 RBP: ffff88807df3fa90 R08: ffffed1017464e99 R09: ffffed1017464e98 R10: ffffed1017464e98 R11: ffff8880ba3274c7 R12: 0000000000000000 R13: ffff8880b021b210 R14: ffffffff88d29b40 R15: ffff88808e446840 d_walk.part.6+0x151/0x6e0 fs/dcache.c:1253 d_walk fs/dcache.c:1246 [inline] do_one_tree+0x1f/0x40 fs/dcache.c:1525 shrink_dcache_for_umount+0x56/0x120 fs/dcache.c:1541 generic_shutdown_super+0x61/0x330 fs/super.c:441 kill_block_super+0x96/0xe0 fs/super.c:1185 erofs_kill_sb+0x9/0x10 drivers/staging/erofs/super.c:518 deactivate_locked_super+0x77/0xd0 fs/super.c:329 mount_bdev+0x2cb/0x330 fs/super.c:1160 erofs_mount+0x6a/0x90 drivers/staging/erofs/super.c:512 mount_fs+0x7f/0x2b0 fs/super.c:1261 vfs_kern_mount.part.11+0x58/0x3d0 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x376/0x2710 fs/namespace.c:2799 ksys_mount+0xb1/0xd0 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3026 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x466f7a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f85c7214fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000466f7a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f85c7215000 RBP: 00007f85c7215040 R08: 00007f85c7215040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f85c7215000 R15: 0000000020000040 Kernel Offset: disabled Rebooting in 86400 seconds..