jfs_dirty_inode called on read-only volume
Is remount racy?
general protection fault, probably for non-canonical address 0xdffffc0000000104: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000820-0x0000000000000827]
CPU: 1 PID: 17222 Comm: syz-executor.0 Not tainted 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x158/0xae0 fs/jfs/jfs_imap.c:316
Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e9 df d6 fe 4c 8b 2b 49 8d 9d 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 c9 df d6 fe 4c 8b 3b 49 8d 5f 28
RSP: 0018:ffffc9000333f758 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88806094e0b0 R08: ffff88806094dd57 R09: 1ffff1100c129baa
R10: dffffc0000000000 R11: ffffed100c129bab R12: 0000000000000006
R13: 0000000000000000 R14: ffff88806094dd48 R15: dffffc0000000000
FS: 0000555594079480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f79f06a0000 CR3: 000000006b970000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
jfs_iget+0x8c/0x3b0 fs/jfs/inode.c:35
jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469
__lookup_slow+0x28c/0x3f0 fs/namei.c:1692
lookup_slow+0x53/0x70 fs/namei.c:1709
walk_component+0x2e1/0x410 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2485
filename_lookup+0x256/0x610 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
ksys_umount fs/namespace.c:1916 [inline]
__do_sys_umount fs/namespace.c:1924 [inline]
__se_sys_umount fs/namespace.c:1922 [inline]
__x64_sys_umount+0xf4/0x170 fs/namespace.c:1922
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58ca47f1d7
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe1f325cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f58ca4c93b9 RCX: 00007f58ca47f1d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe1f325db0
RBP: 00007ffe1f325db0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe1f326ea0
R13: 00007f58ca4c93b9 R14: 000000000005a544 R15: 000000000000001a
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diIAGRead fs/jfs/jfs_imap.c:2662 [inline]
RIP: 0010:diRead+0x158/0xae0 fs/jfs/jfs_imap.c:316
Code: 8d 5d 80 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e9 df d6 fe 4c 8b 2b 49 8d 9d 20 08 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 c9 df d6 fe 4c 8b 3b 49 8d 5f 28
RSP: 0018:ffffc9000333f758 EFLAGS: 00010202
RAX: 0000000000000104 RBX: 0000000000000820 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88806094e0b0 R08: ffff88806094dd57 R09: 1ffff1100c129baa
R10: dffffc0000000000 R11: ffffed100c129bab R12: 0000000000000006
R13: 0000000000000000 R14: ffff88806094dd48 R15: dffffc0000000000
FS: 0000555594079480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48f67ee000 CR3: 000000006b970000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 8d 5d 80 lea -0x80(%rbp),%ebx
3: 48 89 d8 mov %rbx,%rax
6: 48 c1 e8 03 shr $0x3,%rax
a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
f: 74 08 je 0x19
11: 48 89 df mov %rbx,%rdi
14: e8 e9 df d6 fe call 0xfed6e002
19: 4c 8b 2b mov (%rbx),%r13
1c: 49 8d 9d 20 08 00 00 lea 0x820(%r13),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 c9 df d6 fe call 0xfed6e002
39: 4c 8b 3b mov (%rbx),%r15
3c: 49 8d 5f 28 lea 0x28(%r15),%rbx