jfs_dirty_inode called on read-only volume Is remount racy? jfs_dirty_inode called on read-only volume Is remount racy? Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 14768 Comm: syz.1.1874 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:__wake_up_common kernel/sched/wait.c:104 [inline] RIP: 0010:__wake_up_common_lock+0xd3/0x1f0 kernel/sched/wait.c:125 Code: fd 0f 84 d1 00 00 00 8b 6c 24 04 eb 13 48 ba 00 00 00 00 00 fc ff df 4d 39 fd 0f 84 b8 00 00 00 4d 89 ee 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 1f ad 88 00 48 ba 00 00 00 00 00 fc RSP: 0000:ffffc90018a1fa80 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90018a1f960 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52003143f2c R12: ffff88807d6778f8 R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900026d9070 FS: 00007f096cf9e6c0(0000) GS:ffff8881259ff000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c25384e CR3: 00000000569bc000 CR4: 00000000003526f0 Call Trace: txEnd+0x8a/0x530 fs/jfs/jfs_txnmgr.c:504 jfs_create+0x33e/0xa80 fs/jfs/namei.c:159 vfs_create+0x24b/0x400 fs/namei.c:3405 do_mknodat+0x3c6/0x4d0 fs/namei.c:4285 __do_sys_mknod fs/namei.c:4318 [inline] __se_sys_mknod fs/namei.c:4316 [inline] __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4316 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f096c18ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f096cf9e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 00007f096c3b6180 RCX: 00007f096c18ebe9 RDX: 0000000000000702 RSI: 0000000000008000 RDI: 0000200000000080 RBP: 00007f096c211e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f096c3b6218 R14: 00007f096c3b6180 R15: 00007fff0e2d1248 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__wake_up_common kernel/sched/wait.c:104 [inline] RIP: 0010:__wake_up_common_lock+0xd3/0x1f0 kernel/sched/wait.c:125 Code: fd 0f 84 d1 00 00 00 8b 6c 24 04 eb 13 48 ba 00 00 00 00 00 fc ff df 4d 39 fd 0f 84 b8 00 00 00 4d 89 ee 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 1f ad 88 00 48 ba 00 00 00 00 00 fc RSP: 0000:ffffc90018a1fa80 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000002 RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90018a1f960 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52003143f2c R12: ffff88807d6778f8 R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900026d9070 FS: 00007f096cf9e6c0(0000) GS:ffff8881259ff000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c25384e CR3: 00000000569bc000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: fd std 1: 0f 84 d1 00 00 00 je 0xd8 7: 8b 6c 24 04 mov 0x4(%rsp),%ebp b: eb 13 jmp 0x20 d: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 14: fc ff df 17: 4d 39 fd cmp %r15,%r13 1a: 0f 84 b8 00 00 00 je 0xd8 20: 4d 89 ee mov %r13,%r14 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 f7 mov %r14,%rdi 33: e8 1f ad 88 00 call 0x88ad57 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah