Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
Oops: general protection fault, probably for non-canonical address 0xdffffc00000000c7: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000638-0x000000000000063f]
CPU: 0 UID: 0 PID: 6284 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:txEnd+0xb4/0x530
Code: 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 3c f1 db fe 41 bf 38 06 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 1d f1 db fe 49 8b 1f 48 83 c3 30
RSP: 0018:ffffc90004d47be0 EFLAGS: 00010202
RAX: 00000000000000c7 RBX: ffffc90002ab9020 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d791ad3 RDI: 00000000ffffffff
RBP: ffffc90004d47d58 R08: ffffffff8f822077 R09: 1ffffffff1f0440e
R10: dffffc0000000000 R11: fffffbfff1f0440f R12: ffff8881b68cc470
R13: dffffc0000000000 R14: ffffc90002ab9000 R15: 0000000000000638
FS:  00005555596bc500(0000) GS:ffff88818e821000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f06abdc3ef0 CR3: 000000016f88c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 jfs_unlink+0x57b/0xa20
 vfs_unlink+0x380/0x640
 do_unlinkat+0x2cf/0x560
 __x64_sys_unlink+0x47/0x50
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f49a0d8ed77
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff41dface8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f49a0d8ed77
RDX: 00007fff41dfad10 RSI: 00007fff41dfada0 RDI: 00007fff41dfada0
RBP: 00007fff41dfada0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff41dfbe90
R13: 00007f49a0dee72f R14: 0000000000016e7d R15: 00007fff41dfcf60
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txEnd+0xb4/0x530
Code: 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 3c f1 db fe 41 bf 38 06 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 1d f1 db fe 49 8b 1f 48 83 c3 30
RSP: 0018:ffffc90004d47be0 EFLAGS: 00010202
RAX: 00000000000000c7 RBX: ffffc90002ab9020 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d791ad3 RDI: 00000000ffffffff
RBP: ffffc90004d47d58 R08: ffffffff8f822077 R09: 1ffffffff1f0440e
R10: dffffc0000000000 R11: fffffbfff1f0440f R12: ffff8881b68cc470
R13: dffffc0000000000 R14: ffffc90002ab9000 R15: 0000000000000638
FS:  00005555596bc500(0000) GS:ffff88818e821000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f06abdc3ef0 CR3: 000000016f88c000 CR4: 00000000000006f0
