ERROR: (device loop0): remounting filesystem as read-only 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 0xdffffc00000000f3: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000798-0x000000000000079f] CPU: 0 UID: 0 PID: 6392 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:JFS_SBI fs/jfs/jfs_incore.h:217 [inline] RIP: 0010:txEnd+0xb4/0x530 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 3c 03 e3 fe 41 bf 98 07 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 1d 03 e3 fe 49 8b 1f 48 83 c3 30 RSP: 0018:ffffc90004d6fbc0 EFLAGS: 00010206 RAX: 00000000000000f3 RBX: ffffc900031f9020 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8cd8d6e1 RDI: 00000000ffffffff RBP: ffffc90004d6fd40 R08: ffffffff8ed63077 R09: 1ffffffff1dac60e R10: dffffc0000000000 R11: fffffbfff1dac60f R12: ffff888040f43528 R13: dffffc0000000000 R14: ffffc900031f9000 R15: 0000000000000798 FS: 0000555572b45500(0000) GS:ffff888126df9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1bd66092e0 CR3: 000000003e86c000 CR4: 00000000003526f0 Call Trace: jfs_unlink+0x57b/0xa20 fs/jfs/namei.c:558 vfs_unlink+0x39a/0x660 fs/namei.c:4673 do_unlinkat+0x345/0x570 fs/namei.c:4737 __do_sys_unlink fs/namei.c:4783 [inline] __se_sys_unlink fs/namei.c:4781 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4781 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: 0033:0x7f7efb16dcc7 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 57 00 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:00007ffcbec00e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7efb16dcc7 RDX: 00007ffcbec00e90 RSI: 00007ffcbec00f20 RDI: 00007ffcbec00f20 RBP: 00007ffcbec00f20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffcbec02010 R13: 00007f7efb1e15fc R14: 00000000000280a1 R15: 00007ffcbec030d0 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:507 Code: 49 8d 5e 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 3c 03 e3 fe 41 bf 98 07 00 00 4c 03 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 1d 03 e3 fe 49 8b 1f 48 83 c3 30 RSP: 0018:ffffc90004d6fbc0 EFLAGS: 00010206 RAX: 00000000000000f3 RBX: ffffc900031f9020 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8cd8d6e1 RDI: 00000000ffffffff RBP: ffffc90004d6fd40 R08: ffffffff8ed63077 R09: 1ffffffff1dac60e R10: dffffc0000000000 R11: fffffbfff1dac60f R12: ffff888040f43528 R13: dffffc0000000000 R14: ffffc900031f9000 R15: 0000000000000798 FS: 0000555572b45500(0000) GS:ffff888126df9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1bd66092e0 CR3: 000000003e86c000 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 3c 03 e3 fe call 0xfee30356 1a: 41 bf 98 07 00 00 mov $0x798,%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 1d 03 e3 fe call 0xfee30356 39: 49 8b 1f mov (%r15),%rbx 3c: 48 83 c3 30 add $0x30,%rbx