Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 6523 Comm: syz.1.153 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 a5 ec 94 00 45 39 ee 76 11 e8 db ea 94 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:ffffc9000512f928 EFLAGS: 00010293 RAX: ffffffff812b42ab RBX: dffffc0000000000 RCX: 0000000000000002 RDX: ffff88802c2ddac0 RSI: 00000000000001ff RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff8880658cc0b3 R09: 1ffff1100cb19816 R10: dffffc0000000000 R11: ffffed100cb19817 R12: 0000000000000008 R13: 00000000000001ff R14: 0000000000000000 R15: 0000000000000200 FS: 00007f42096146c0(0000) GS:ffff888125f29000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c25d94c CR3: 000000007dab8000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: 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: 0033:0x7f420878efc9 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:00007f4209614038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f42089e5fa0 RCX: 00007f420878efc9 RDX: 0000000000002020 RSI: 00002000000040c0 RDI: 0000000000000004 RBP: 00007f4208811f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f42089e6038 R14: 00007f42089e5fa0 R15: 00007ffdcd0d6428 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 a5 ec 94 00 45 39 ee 76 11 e8 db ea 94 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:ffffc9000512f928 EFLAGS: 00010293 RAX: ffffffff812b42ab RBX: dffffc0000000000 RCX: 0000000000000002 RDX: ffff88802c2ddac0 RSI: 00000000000001ff RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff8880658cc0b3 R09: 1ffff1100cb19816 R10: dffffc0000000000 R11: ffffed100cb19817 R12: 0000000000000008 R13: 00000000000001ff R14: 0000000000000000 R15: 0000000000000200 FS: 00007f42096146c0(0000) GS:ffff888126029000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2662a7ae9c CR3: 000000007dab8000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- 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 a5 ec 94 00 call 0x94ecb9 14: 45 39 ee cmp %r13d,%r14d 17: 76 11 jbe 0x2a 19: e8 db ea 94 00 call 0x94eaf9 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