jfs_dirty_inode called on read-only volume Is remount racy? 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 0xdffffc00000000cf: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000678-0x000000000000067f] CPU: 1 UID: 0 PID: 5611 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:JFS_SBI fs/jfs/jfs_incore.h:217 [inline] RIP: 0010:txEnd+0xb4/0x530 fs/jfs/jfs_txnmgr.c:508 Code: 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 ec 10 c4 fe 41 bf 78 06 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 cd 10 c4 fe 49 8b 1f 48 83 c3 30 RSP: 0018:ffffc900040e7be0 EFLAGS: 00010206 RAX: 00000000000000cf RBX: ffffc90002649020 RCX: ffffffff9a9f7a01 RDX: 0000000000000001 RSI: ffffffff8e43d4e5 RDI: 00000000ffffffff RBP: ffffc900040e7d58 R08: ffffffff9079b1bf R09: 1ffffffff20f3637 R10: dffffc0000000000 R11: fffffbfff20f3638 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90002649000 R15: 0000000000000678 FS: 0000555565d5a500(0000) GS:ffff888124dbd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000001f1000 CR3: 000000007424e000 CR4: 00000000003526f0 Call Trace: jfs_unlink+0x555/0x9e0 fs/jfs/namei.c:559 vfs_unlink+0x27b/0x6d0 fs/namei.c:5662 filename_unlinkat+0x3cd/0x610 fs/namei.c:5732 __do_sys_unlink fs/namei.c:5767 [inline] __se_sys_unlink+0x2e/0x140 fs/namei.c:5764 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f64c9f9d247 Code: 73 01 c3 48 c7 c1 e8 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 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fff7851b628 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f64c9f9d247 RDX: 00007fff7851b650 RSI: 00007fff7851b6e0 RDI: 00007fff7851b6e0 RBP: 00007fff7851b6e0 R08: 00007fff7851c6e0 R09: 00000000ffffffff R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff7851c7d0 R13: 00007f64ca0344bb R14: 0000000000020925 R15: 00007fff7851d8a0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:JFS_SBI fs/jfs/jfs_incore.h:217 [inline] RIP: 0010:txEnd+0xb4/0x530 fs/jfs/jfs_txnmgr.c:508 Code: 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 ec 10 c4 fe 41 bf 78 06 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 cd 10 c4 fe 49 8b 1f 48 83 c3 30 RSP: 0018:ffffc900040e7be0 EFLAGS: 00010206 RAX: 00000000000000cf RBX: ffffc90002649020 RCX: ffffffff9a9f7a01 RDX: 0000000000000001 RSI: ffffffff8e43d4e5 RDI: 00000000ffffffff RBP: ffffc900040e7d58 R08: ffffffff9079b1bf R09: 1ffffffff20f3637 R10: dffffc0000000000 R11: fffffbfff20f3638 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90002649000 R15: 0000000000000678 FS: 0000555565d5a500(0000) GS:ffff888124dbd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000001f1000 CR3: 000000007424e000 CR4: 00000000003526f0 ---------------- 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 ec 10 c4 fe call 0xfec41106 1a: 41 bf 78 06 00 00 mov $0x678,%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 cd 10 c4 fe call 0xfec41106 39: 49 8b 1f mov (%r15),%rbx 3c: 48 83 c3 30 add $0x30,%rbx