btstack dump:
bn = 0, index = 0
bn = 72c, index = 96
bn = 0, index = 0
bn = 72c, index = 96
bn = 0, index = 0
bn = 72c, index = 96
bn = 0, index = 0
bn = 0, index = 0
general protection fault, probably for non-canonical address 0xdffffc0000000037: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001b8-0x00000000000001bf]
CPU: 0 PID: 8586 Comm: syz.4.1023 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:write_one_page+0x2a5/0x670 mm/page-writeback.c:2431
Code: 04 00 00 00 e8 bc 27 1d 00 f0 41 ff 06 48 8b 44 24 18 48 8d 98 b8 01 00 00 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 74 08 48 89 df e8 ec 25 1d 00 48 8b 1b 48 89 d8 48
RSP: 0018:ffffc90004c77840 EFLAGS: 00010202
RAX: 0000000000000037 RBX: 00000000000001b8 RCX: ffffffff81a0ecb4
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea000063ff74
RBP: ffffc90004c77958 R08: ffffea000063ff77 R09: 1ffffd40000c7fee
R10: dffffc0000000000 R11: fffff940000c7fef R12: 1ffffd40000c7fe9
R13: ffffea000063ff40 R14: dffffc0000000000 R15: 1ffff9200098ef0c
FS: 00007fd3f94116c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04b886fa08 CR3: 0000000060fd3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
release_metapage+0x5e4/0xda0 fs/jfs/jfs_metapage.c:750
dtSearch+0x1a7b/0x1f60 fs/jfs/jfs_dtree.c:793
jfs_symlink+0x85a/0xfd0 fs/jfs/namei.c:1016
vfs_symlink+0x245/0x3d0 fs/namei.c:4437
do_symlinkat+0x1ab/0x6b0 fs/namei.c:4466
__do_sys_symlinkat fs/namei.c:4483 [inline]
__se_sys_symlinkat fs/namei.c:4480 [inline]
__x64_sys_symlinkat+0x95/0xa0 fs/namei.c:4480
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd3fb1b7e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fd3f9411028 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007fd3fb430fa0 RCX: 00007fd3fb1b7e59
RDX: 00002000000005c0 RSI: ffffffffffffff9c RDI: 0000200000000700
RBP: 00007fd3fb24de6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd3fb431038 R14: 00007fd3fb430fa0 R15: 00007ffd7cd79c68
</TASK>
Modules linked in:
---[ end trace e929843a805241e6 ]---
RIP: 0010:write_one_page+0x2a5/0x670 mm/page-writeback.c:2431
Code: 04 00 00 00 e8 bc 27 1d 00 f0 41 ff 06 48 8b 44 24 18 48 8d 98 b8 01 00 00 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 74 08 48 89 df e8 ec 25 1d 00 48 8b 1b 48 89 d8 48
RSP: 0018:ffffc90004c77840 EFLAGS: 00010202
RAX: 0000000000000037 RBX: 00000000000001b8 RCX: ffffffff81a0ecb4
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea000063ff74
RBP: ffffc90004c77958 R08: ffffea000063ff77 R09: 1ffffd40000c7fee
R10: dffffc0000000000 R11: fffff940000c7fef R12: 1ffffd40000c7fe9
R13: ffffea000063ff40 R14: dffffc0000000000 R15: 1ffff9200098ef0c
FS: 00007fd3f94116c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5dadb42f8 CR3: 0000000060fd3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 04 00 add $0x0,%al
2: 00 00 add %al,(%rax)
4: e8 bc 27 1d 00 call 0x1d27c5
9: f0 41 ff 06 lock incl (%r14)
d: 48 8b 44 24 18 mov 0x18(%rsp),%rax
12: 48 8d 98 b8 01 00 00 lea 0x1b8(%rax),%rbx
19: 48 89 d8 mov %rbx,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
27: fc ff df
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 ec 25 1d 00 call 0x1d2625
39: 48 8b 1b mov (%rbx),%rbx
3c: 48 89 d8 mov %rbx,%rax
3f: 48 rex.W