jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_rename did not expect dtDelete to return rc = -2
ERROR: (device (efault)): jfs_rename: 
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 0 UID: 0 PID: 5807 Comm: syz.0.17 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:sb_rdonly include/linux/fs/super.h:187 [inline]
RIP: 0010:jfs_handle_error fs/jfs/super.c:66 [inline]
RIP: 0010:jfs_error+0x13b/0x2c0 fs/jfs/super.c:98
Code: 8d b7 58 06 00 00 48 8b 55 08 48 8d 4c 24 60 48 c7 c7 40 64 0b 8c 48 89 34 24 e8 10 6d fe ff 4d 8d 67 50 4d 89 e6 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 e7 e8 56 9e 07 01 4c 89 64 24 08 4d 8b
RSP: 0018:ffffc90003ba77e0 EFLAGS: 00010206
RAX: 0000000000000027 RBX: 1ffff92000774f04 RCX: 127ebd35812ee300
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003ba78f0 R08: ffff8881210247d3 R09: 1ffff110242048fa
R10: dffffc0000000000 R11: ffffed10242048fb R12: 0000000000000050
R13: dffffc0000000000 R14: 000000000000000a R15: 0000000000000000
FS:  00007f7d29a7d6c0(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32f63fff CR3: 00000001723e4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 jfs_rename+0xce0/0x1860 fs/jfs/namei.c:1244
 vfs_rename+0xa96/0xeb0 fs/namei.c:6054
 filename_renameat2+0x539/0x9c0 fs/namei.c:6172
 __do_sys_rename fs/namei.c:6216 [inline]
 __se_sys_rename+0x55/0x2c0 fs/namei.c:6212
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7d28b9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7d29a7d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f7d28e15fa0 RCX: 00007f7d28b9cdd9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000200000000000
RBP: 00007f7d28c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7d28e16038 R14: 00007f7d28e15fa0 R15: 00007fff48079558
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sb_rdonly include/linux/fs/super.h:187 [inline]
RIP: 0010:jfs_handle_error fs/jfs/super.c:66 [inline]
RIP: 0010:jfs_error+0x13b/0x2c0 fs/jfs/super.c:98
Code: 8d b7 58 06 00 00 48 8b 55 08 48 8d 4c 24 60 48 c7 c7 40 64 0b 8c 48 89 34 24 e8 10 6d fe ff 4d 8d 67 50 4d 89 e6 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 e7 e8 56 9e 07 01 4c 89 64 24 08 4d 8b
RSP: 0018:ffffc90003ba77e0 EFLAGS: 00010206
RAX: 0000000000000027 RBX: 1ffff92000774f04 RCX: 127ebd35812ee300
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003ba78f0 R08: ffff8881210247d3 R09: 1ffff110242048fa
R10: dffffc0000000000 R11: ffffed10242048fb R12: 0000000000000050
R13: dffffc0000000000 R14: 000000000000000a R15: 0000000000000000
FS:  00007f7d29a7d6c0(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d28bea4c0 CR3: 00000001723e4000 CR4: 00000000000006f0
----------------
Code disassembly (best guess):
   0:	8d b7 58 06 00 00    	lea    0x658(%rdi),%esi
   6:	48 8b 55 08          	mov    0x8(%rbp),%rdx
   a:	48 8d 4c 24 60       	lea    0x60(%rsp),%rcx
   f:	48 c7 c7 40 64 0b 8c 	mov    $0xffffffff8c0b6440,%rdi
  16:	48 89 34 24          	mov    %rsi,(%rsp)
  1a:	e8 10 6d fe ff       	call   0xfffe6d2f
  1f:	4d 8d 67 50          	lea    0x50(%r15),%r12
  23:	4d 89 e6             	mov    %r12,%r14
  26:	49 c1 ee 03          	shr    $0x3,%r14
* 2a:	43 80 3c 2e 00       	cmpb   $0x0,(%r14,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 e7             	mov    %r12,%rdi
  34:	e8 56 9e 07 01       	call   0x1079e8f
  39:	4c 89 64 24 08       	mov    %r12,0x8(%rsp)
  3e:	4d                   	rex.WRB
  3f:	8b                   	.byte 0x8b
