read_mapping_page failed! diRead: diIAGRead returned -5 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 10445 Comm: syz.7.443 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x81d/0xef0 fs/jfs/jfs_logmgr.c:1572 Code: e3 aa fe 4d 8d 77 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 d1 77 d6 fe 4d 8b 26 49 83 c4 30 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 b5 77 d6 fe 49 8b 3c 24 e8 4c e3 aa RSP: 0018:ffffc90005837980 EFLAGS: 00010206 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff8880284ebd00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90005837ac0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc90005837768 R11: fffff52000b06f1a R12: 0000000000000030 R13: ffff8880415f4a18 R14: ffff888032b6e028 R15: ffff888032b6e038 FS: 00007f4375df66c0(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f06531a8e9c CR3: 000000003dc32000 CR4: 00000000003526f0 Call Trace: jfs_umount+0x178/0x3c0 fs/jfs/jfs_umount.c:58 jfs_fill_super+0x9c5/0xd80 fs/jfs/super.c:567 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3839 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4338 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4377b9da0a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4375df5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4375df5ee0 RCX: 00007f4377b9da0a RDX: 0000200000000040 RSI: 0000200000000080 RDI: 00007f4375df5ea0 RBP: 0000200000000040 R08: 00007f4375df5ee0 R09: 0000000000210004 R10: 0000000000210004 R11: 0000000000000246 R12: 0000200000000080 R13: 00007f4375df5ea0 R14: 0000000000006315 R15: 00002000000002c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x81d/0xef0 fs/jfs/jfs_logmgr.c:1572 Code: e3 aa fe 4d 8d 77 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 d1 77 d6 fe 4d 8b 26 49 83 c4 30 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 b5 77 d6 fe 49 8b 3c 24 e8 4c e3 aa RSP: 0018:ffffc90005837980 EFLAGS: 00010206 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: ffff8880284ebd00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90005837ac0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc90005837768 R11: fffff52000b06f1a R12: 0000000000000030 R13: ffff8880415f4a18 R14: ffff888032b6e028 R15: ffff888032b6e038 FS: 00007f4375df66c0(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f06531a8e9c CR3: 000000003dc32000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: e3 aa jrcxz 0xffffffac 2: fe 4d 8d decb -0x73(%rbp) 5: 77 f0 ja 0xfffffff7 7: 4c 89 f0 mov %r14,%rax a: 48 c1 e8 03 shr $0x3,%rax e: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 12: 74 08 je 0x1c 14: 4c 89 f7 mov %r14,%rdi 17: e8 d1 77 d6 fe call 0xfed677ed 1c: 4d 8b 26 mov (%r14),%r12 1f: 49 83 c4 30 add $0x30,%r12 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 e7 mov %r12,%rdi 33: e8 b5 77 d6 fe call 0xfed677ed 38: 49 8b 3c 24 mov (%r12),%rdi 3c: e8 .byte 0xe8 3d: 4c e3 aa rex.WR jrcxz 0xffffffea