Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 6013 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__io_uring_show_fdinfo io_uring/fdinfo.c:103 [inline]
RIP: 0010:io_uring_show_fdinfo+0x371/0x1840 io_uring/fdinfo.c:255
Code: 0f 85 29 04 00 00 45 8b 36 44 89 f7 44 89 ee e8 15 3b 95 00 45 39 ee 76 11 e8 4b 39 95 00 45 89 fd 4c 8b 3c 24 e9 c9 03 00 00 <80> 3b 00 45 89 fd 0f 85 17 04 00 00 0f b6 2c 25 00 00 00 00 48 8b
RSP: 0018:ffffc90003a9f928 EFLAGS: 00010293
RAX: ffffffff812b443b RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88802ec55ac0 RSI: 0000000000000fff RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807aa560aa R09: 1ffff1100f54ac15
R10: dffffc0000000000 R11: ffffed100f54ac16 R12: 0000000000000008
R13: 0000000000000fff R14: 0000000000000000 R15: 0000000000000000
FS: 0000555561784500(0000) GS:ffff888125de4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30263fff CR3: 000000007ad30000 CR4: 00000000003526f0
Call Trace:
<TASK>
seq_show+0x5bc/0x730 fs/proc/fd.c:68
seq_read_iter+0x4ef/0xe20 fs/seq_file.c:230
seq_read+0x369/0x480 fs/seq_file.c:162
vfs_read+0x200/0xa30 fs/read_write.c:570
ksys_read+0x145/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2bf498efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff1b261a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f2bf4be5fa0 RCX: 00007f2bf498efc9
RDX: 0000000000002020 RSI: 00002000000040c0 RDI: 0000000000000004
RBP: 00007f2bf4a11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2bf4be5fa0 R14: 00007f2bf4be5fa0 R15: 0000000000000003
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__io_uring_show_fdinfo io_uring/fdinfo.c:103 [inline]
RIP: 0010:io_uring_show_fdinfo+0x371/0x1840 io_uring/fdinfo.c:255
Code: 0f 85 29 04 00 00 45 8b 36 44 89 f7 44 89 ee e8 15 3b 95 00 45 39 ee 76 11 e8 4b 39 95 00 45 89 fd 4c 8b 3c 24 e9 c9 03 00 00 <80> 3b 00 45 89 fd 0f 85 17 04 00 00 0f b6 2c 25 00 00 00 00 48 8b
RSP: 0018:ffffc90003a9f928 EFLAGS: 00010293
RAX: ffffffff812b443b RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88802ec55ac0 RSI: 0000000000000fff RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807aa560aa R09: 1ffff1100f54ac15
R10: dffffc0000000000 R11: ffffed100f54ac16 R12: 0000000000000008
R13: 0000000000000fff R14: 0000000000000000 R15: 0000000000000000
FS: 0000555561784500(0000) GS:ffff888125de4000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb550764e9c CR3: 000000007ad30000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 0f 85 29 04 00 00 jne 0x42f
6: 45 8b 36 mov (%r14),%r14d
9: 44 89 f7 mov %r14d,%edi
c: 44 89 ee mov %r13d,%esi
f: e8 15 3b 95 00 call 0x953b29
14: 45 39 ee cmp %r13d,%r14d
17: 76 11 jbe 0x2a
19: e8 4b 39 95 00 call 0x953969
1e: 45 89 fd mov %r15d,%r13d
21: 4c 8b 3c 24 mov (%rsp),%r15
25: e9 c9 03 00 00 jmp 0x3f3
* 2a: 80 3b 00 cmpb $0x0,(%rbx) <-- trapping instruction
2d: 45 89 fd mov %r15d,%r13d
30: 0f 85 17 04 00 00 jne 0x44d
36: 0f b6 2c 25 00 00 00 movzbl 0x0,%ebp
3d: 00
3e: 48 rex.W
3f: 8b .byte 0x8b