read_mapping_page failed! diRead: diIAGRead returned -5 general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] CPU: 0 PID: 9670 Comm: syz.9.626 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] RIP: 0010:jfs_flush_journal+0x7ae/0xeb0 fs/jfs/jfs_logmgr.c:1573 Code: 00 00 00 4d 8d 77 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 d0 4c dc fe 4d 8b 26 49 83 c4 40 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 b4 4c dc fe 49 8b 3c 24 e8 cb 4c b2 RSP: 0018:ffffc90005887a00 EFLAGS: 00010202 RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 0000000000080000 RDX: ffffc9001c404000 RSI: 000000000000dab2 RDI: 000000000000dab3 RBP: ffffc90005887b28 R08: 0000000000000004 R09: 0000000000000004 R10: ffffc90005887924 R11: fffff52000b10f2d R12: 0000000000000040 R13: ffff88802550f9a8 R14: ffff888024931210 R15: ffff888024931238 FS: 00007fdf8c2ce6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20b123d440 CR3: 000000002e5a2000 CR4: 00000000003506f0 Call Trace: jfs_umount+0x178/0x3c0 fs/jfs/jfs_umount.c:58 jfs_fill_super+0x808/0xac0 fs/jfs/super.c:600 mount_bdev+0x22b/0x2d0 fs/super.c:1643 legacy_get_tree+0xea/0x180 fs/fs_context.c:662 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fdf8b390eea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdf8c2cde68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fdf8c2cdef0 RCX: 00007fdf8b390eea RDX: 0000200000000080 RSI: 0000200000000000 RDI: 00007fdf8c2cdeb0 RBP: 0000200000000080 R08: 00007fdf8c2cdef0 R09: 000000000201088a R10: 000000000201088a R11: 0000000000000246 R12: 0000200000000000 R13: 00007fdf8c2cdeb0 R14: 00000000000061a5 R15: 00002000000000c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] RIP: 0010:jfs_flush_journal+0x7ae/0xeb0 fs/jfs/jfs_logmgr.c:1573 Code: 00 00 00 4d 8d 77 d8 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 d0 4c dc fe 4d 8b 26 49 83 c4 40 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 e7 e8 b4 4c dc fe 49 8b 3c 24 e8 cb 4c b2 RSP: 0018:ffffc90005887a00 EFLAGS: 00010202 RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 0000000000080000 RDX: ffffc9001c404000 RSI: 000000000000dab2 RDI: 000000000000dab3 RBP: ffffc90005887b28 R08: 0000000000000004 R09: 0000000000000004 R10: ffffc90005887924 R11: fffff52000b10f2d R12: 0000000000000040 R13: ffff88802550f9a8 R14: ffff888024931210 R15: ffff888024931238 FS: 00007fdf8c2ce6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff6ed6e728 CR3: 000000002e5a2000 CR4: 00000000003506e0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 4d 8d add %cl,-0x73(%rbp) 5: 77 d8 ja 0xffffffdf 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 d0 4c dc fe call 0xfedc4cec 1c: 4d 8b 26 mov (%r14),%r12 1f: 49 83 c4 40 add $0x40,%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 b4 4c dc fe call 0xfedc4cec 38: 49 8b 3c 24 mov (%r12),%rdi 3c: e8 .byte 0xe8 3d: cb lret 3e: 4c rex.WR 3f: b2 .byte 0xb2