find_entry called with index = 0
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
general protection fault, probably for non-canonical address 0xdffffc00000000c6: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000630-0x0000000000000637]
CPU: 1 PID: 6643 Comm: syz.0.147 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:JFS_SBI fs/jfs/jfs_incore.h:217 [inline]
RIP: 0010:txEnd+0xb4/0x520 fs/jfs/jfs_txnmgr.c:507
Code: 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 bc 07 dc fe 41 bf 30 06 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 9d 07 dc fe 49 8b 1f 48 83 c3 30
RSP: 0018:ffffc90004d4fb60 EFLAGS: 00010206
RAX: 00000000000000c6 RBX: ffffc90002659020 RCX: 1ffff920009a9f50
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 00000000ffffffff
RBP: ffffc90004d4fdd0 R08: ffffffff90d9454f R09: 1ffffffff21b28a9
R10: dffffc0000000000 R11: fffffbfff21b28aa R12: ffff888078410d38
R13: dffffc0000000000 R14: ffffc90002659000 R15: 0000000000000630
FS:  00007f2219d7c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2219d5bd58 CR3: 000000005b04c000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 jfs_mkdir+0x337/0xa30 fs/jfs/namei.c:293
 vfs_mkdir+0x296/0x440 fs/namei.c:4121
 do_mkdirat+0x1d4/0x440 fs/namei.c:4144
 __do_sys_mkdirat fs/namei.c:4159 [inline]
 __se_sys_mkdirat fs/namei.c:4157 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2218f8de97
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 02 01 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:00007f2219d7be68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f2219d7bef0 RCX: 00007f2218f8de97
RDX: 00000000000001ff RSI: 0000200000000140 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000140
R13: 00007f2219d7beb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:JFS_SBI fs/jfs/jfs_incore.h:217 [inline]
RIP: 0010:txEnd+0xb4/0x520 fs/jfs/jfs_txnmgr.c:507
Code: 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 bc 07 dc fe 41 bf 30 06 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 9d 07 dc fe 49 8b 1f 48 83 c3 30
RSP: 0018:ffffc90004d4fb60 EFLAGS: 00010206
RAX: 00000000000000c6 RBX: ffffc90002659020 RCX: 1ffff920009a9f50
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 00000000ffffffff
RBP: ffffc90004d4fdd0 R08: ffffffff90d9454f R09: 1ffffffff21b28a9
R10: dffffc0000000000 R11: fffffbfff21b28aa R12: ffff888078410d38
R13: dffffc0000000000 R14: ffffc90002659000 R15: 0000000000000630
FS:  00007f2219d7c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2219d5bd58 CR3: 000000005b04c000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	49 8d 5e 20          	lea    0x20(%r14),%rbx
   4:	48 89 d8             	mov    %rbx,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  10:	74 08                	je     0x1a
  12:	48 89 df             	mov    %rbx,%rdi
  15:	e8 bc 07 dc fe       	call   0xfedc07d6
  1a:	41 bf 30 06 00 00    	mov    $0x630,%r15d
  20:	4c 03 3b             	add    (%rbx),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 9d 07 dc fe       	call   0xfedc07d6
  39:	49 8b 1f             	mov    (%r15),%rbx
  3c:	48 83 c3 30          	add    $0x30,%rbx