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 0xdffffc00000000c7: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000638-0x000000000000063f] CPU: 0 UID: 0 PID: 5790 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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 bc 72 de fe 41 bf 38 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 72 de fe 49 8b 1f 48 83 c3 30 RSP: 0018:ffffc90002307bc0 EFLAGS: 00010202 RAX: 00000000000000c7 RBX: ffffc900013f9020 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8d7100d2 RDI: 00000000ffffffff RBP: ffffc90002307d40 R08: ffffffff8f7cfb77 R09: 1ffffffff1ef9f6e R10: dffffc0000000000 R11: fffffbfff1ef9f6f R12: ffff888041f23220 R13: dffffc0000000000 R14: ffffc900013f9000 R15: 0000000000000638 FS: 0000555561ccc500(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6cd0d62eb8 CR3: 0000000056a7c000 CR4: 0000000000352ef0 Call Trace: jfs_unlink+0x57b/0xa20 fs/jfs/namei.c:558 vfs_unlink+0x394/0x650 fs/namei.c:4673 do_unlinkat+0x345/0x560 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: 0033:0x7f3bdb58c717 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:00007ffebe47b1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3bdb58c717 RDX: 00007ffebe47b210 RSI: 00007ffebe47b2a0 RDI: 00007ffebe47b2a0 RBP: 00007ffebe47b2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffebe47c390 R13: 00007f3bdb60e08c R14: 0000000000026874 R15: 00007ffebe47d460 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 bc 72 de fe 41 bf 38 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 72 de fe 49 8b 1f 48 83 c3 30 RSP: 0018:ffffc90002307bc0 EFLAGS: 00010202 RAX: 00000000000000c7 RBX: ffffc900013f9020 RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8d7100d2 RDI: 00000000ffffffff RBP: ffffc90002307d40 R08: ffffffff8f7cfb77 R09: 1ffffffff1ef9f6e R10: dffffc0000000000 R11: fffffbfff1ef9f6f R12: ffff888041f23220 R13: dffffc0000000000 R14: ffffc900013f9000 R15: 0000000000000638 FS: 0000555561ccc500(0000) GS:ffff88808d732000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6cd0d62eb8 CR3: 0000000056a7c000 CR4: 0000000000352ef0 ---------------- 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 72 de fe call 0xfede72d6 1a: 41 bf 38 06 00 00 mov $0x638,%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 72 de fe call 0xfede72d6 39: 49 8b 1f mov (%r15),%rbx 3c: 48 83 c3 30 add $0x30,%rbx