general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 PID: 3614 Comm: syz-executor157 Not tainted 6.1.0-rc1-syzkaller-00249-g4da34b7d175d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x7e7/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: ae fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 17 b0 d6 fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 fa af d6 fe 48 8b 3b e8 b2 99 ae RSP: 0018:ffffc90003d8f9e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 9ca259ca3e16ec00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003d8fb10 R08: ffffffff81b3a473 R09: ffffc90003d8f930 R10: fffff520007b1f29 R11: 1ffff920007b1f26 R12: 1ffff920007b1f48 R13: dffffc0000000000 R14: ffff888027247000 R15: ffff888012f7b438 FS: 0000555556ca4300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9f4534840 CR3: 00000000734d5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_umount+0xf3/0x370 fs/jfs/jfs_umount.c:58 jfs_fill_super+0x911/0xc50 fs/jfs/super.c:600 mount_bdev+0x26c/0x3a0 fs/super.c:1400 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb9f45062aa Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd601d06f8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fb9f45062aa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd601d0710 RBP: 00007ffd601d0710 R08: 00007ffd601d0750 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 R13: 00007ffd601d0750 R14: 000000000000035a R15: 0000000020005270 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x7e7/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: ae fe 49 8d 5f f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 17 b0 d6 fe 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 fa af d6 fe 48 8b 3b e8 b2 99 ae RSP: 0018:ffffc90003d8f9e0 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000030 RCX: 9ca259ca3e16ec00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003d8fb10 R08: ffffffff81b3a473 R09: ffffc90003d8f930 R10: fffff520007b1f29 R11: 1ffff920007b1f26 R12: 1ffff920007b1f48 R13: dffffc0000000000 R14: ffff888027247000 R15: ffff888012f7b438 FS: 0000555556ca4300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9f4534840 CR3: 00000000734d5000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ae scas %es:(%rdi),%al 1: fe 49 8d decb -0x73(%rcx) 4: 5f pop %rdi 5: f0 48 89 d8 lock mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 17 b0 d6 fe callq 0xfed6b033 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 30 add $0x30,%rbx 23: 48 89 d8 mov %rbx,%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: 48 89 df mov %rbx,%rdi 34: e8 fa af d6 fe callq 0xfed6b033 39: 48 8b 3b mov (%rbx),%rdi 3c: e8 .byte 0xe8 3d: b2 99 mov $0x99,%dl 3f: ae scas %es:(%rdi),%al