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: 1 PID: 9364 Comm: syz.6.1202 Not tainted syzkaller #0 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+0x812/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: 7c ae fe 4d 8d 77 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 bc ce d8 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 a0 ce d8 fe 49 8b 3c 24 e8 57 7c ae RSP: 0018:ffffc90005687a00 EFLAGS: 00010202 RAX: 0000000000000008 RBX: dffffc0000000000 RCX: fd5e0298678e9300 RDX: ffffc9001c6af000 RSI: 000000000000e314 RDI: 000000000000e315 RBP: ffffc90005687b28 R08: 0000000000000004 R09: 0000000000000004 R10: ffffc90005687924 R11: fffff52000ad0f2d R12: 0000000000000040 R13: ffff88807e5499a8 R14: ffff88804e816428 R15: ffff88804e816438 FS: 00007f53d8fe56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f326ad909c0 CR3: 0000000032d6a000 CR4: 00000000003506e0 Call Trace: jfs_umount+0x178/0x3c0 fs/jfs/jfs_umount.c:58 jfs_fill_super+0x80e/0xad0 fs/jfs/super.c:600 mount_bdev+0x221/0x2d0 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+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f53d819da0a 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:00007f53d8fe4e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f53d8fe4ee0 RCX: 00007f53d819da0a RDX: 0000200000000080 RSI: 0000200000000000 RDI: 00007f53d8fe4ea0 RBP: 0000200000000080 R08: 00007f53d8fe4ee0 R09: 0000000002010880 R10: 0000000002010880 R11: 0000000000000246 R12: 0000200000000000 R13: 00007f53d8fe4ea0 R14: 00000000000060a5 R15: 0000200000000400 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] RIP: 0010:jfs_flush_journal+0x812/0xec0 fs/jfs/jfs_logmgr.c:1573 Code: 7c ae fe 4d 8d 77 f0 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 bc ce d8 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 a0 ce d8 fe 49 8b 3c 24 e8 57 7c ae RSP: 0018:ffffc90005687a00 EFLAGS: 00010202 RAX: 0000000000000008 RBX: dffffc0000000000 RCX: fd5e0298678e9300 RDX: ffffc9001c6af000 RSI: 000000000000e314 RDI: 000000000000e315 RBP: ffffc90005687b28 R08: 0000000000000004 R09: 0000000000000004 R10: ffffc90005687924 R11: fffff52000ad0f2d R12: 0000000000000040 R13: ffff88807e5499a8 R14: ffff88804e816428 R15: ffff88804e816438 FS: 00007f53d8fe56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa688de82f8 CR3: 0000000032d6a000 CR4: 00000000003506f0 ---------------- Code disassembly (best guess): 0: 7c ae jl 0xffffffb0 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 bc ce d8 fe call 0xfed8ced8 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 a0 ce d8 fe call 0xfed8ced8 38: 49 8b 3c 24 mov (%r12),%rdi 3c: e8 .byte 0xe8 3d: 57 push %rdi 3e: 7c ae jl 0xffffffee