RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f7ffbdc3000 RBP: 00007f7ffbdc3040 R08: 00007f7ffbdc3040 R09: 0000000020000000 R10: 0000000002008082 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f7ffbdc3000 R15: 0000000020000080 ------------[ cut here ]------------ kernel BUG at fs/inode.c:1571! erofs: read_super, device -> /dev/loop3 erofs: options -> acl,noacl, invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 21613 Comm: syz-executor.4 Not tainted 4.19.196-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:iput+0x727/0x860 fs/inode.c:1571 Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 18 fd ff ff 48 8b 3c 24 e8 43 db ee ff e9 0a fd ff ff e8 f9 10 b9 ff <0f> 0b e8 f2 10 b9 ff 48 89 ef e8 1a f7 ff ff 4c 89 f7 e8 12 03 6f RSP: 0018:ffff8880af1f7a80 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000040 RCX: ffffc9000e468000 RDX: 0000000000040000 RSI: ffffffff81a96e47 RDI: 0000000000000007 RBP: ffff88803d86b540 R08: 0000000000000000 R09: 0000000000000000 erofs: read_super, device -> /dev/loop5 R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880b4927780 R13: ffff88803d86b540 R14: 0000000000000000 R15: 00000000fffffff4 FS: 00007f7ffbdc3700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000003114708 CR3: 000000009774a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: erofs_read_super drivers/staging/erofs/super.c:439 [inline] erofs_fill_super+0x1205/0x12cc drivers/staging/erofs/super.c:499 erofs: options -> acl,noacl, mount_bdev+0x2fc/0x3b0 fs/super.c:1158 erofs_mount+0x8c/0xc0 drivers/staging/erofs/super.c:512 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x467afa 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:00007f7ffbdc2fa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f7ffbdc3000 RBP: 00007f7ffbdc3040 R08: 00007f7ffbdc3040 R09: 0000000020000000 R10: 0000000002008082 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f7ffbdc3000 R15: 0000000020000080 Modules linked in: erofs: unmounted for /dev/loop3 ---[ end trace 7b96f00849cc9320 ]--- RIP: 0010:iput+0x727/0x860 fs/inode.c:1571 erofs: unmounted for /dev/loop5 Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 18 fd ff ff 48 8b 3c 24 e8 43 db ee ff e9 0a fd ff ff e8 f9 10 b9 ff <0f> 0b e8 f2 10 b9 ff 48 89 ef e8 1a f7 ff ff 4c 89 f7 e8 12 03 6f RSP: 0018:ffff8880af1f7a80 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000040 RCX: ffffc9000e468000 RDX: 0000000000040000 RSI: ffffffff81a96e47 RDI: 0000000000000007 RBP: ffff88803d86b540 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880b4927780 R13: ffff88803d86b540 R14: 0000000000000000 R15: 00000000fffffff4 FS: 00007f7ffbdc3700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005461f8 CR3: 000000009774a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400