general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 19382 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-10204-gb84acc11b1c9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:io_uring_show_fdinfo+0x391/0x1790 io_uring/fdinfo.c:96 Code: 00 00 00 42 80 3c 28 00 74 0f 48 8b 7c 24 30 e8 05 9f 21 f7 48 8b 4c 24 30 44 21 f3 48 c1 e3 02 48 03 19 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 64 02 00 00 8b 1b 89 df 44 89 f6 e8 f7 ca RSP: 0018:ffffc90015c6f780 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807b3d40d0 RDX: ffff88802615d940 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90015c6f8f8 R08: ffffffff8ac5982f R09: 1ffff1101097d013 R10: dffffc0000000000 R11: ffffed101097d014 R12: ffff88807eb515c8 R13: dffffc0000000000 R14: 0000000000003fff R15: 0000000000000001 FS: 00007f65ab75c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fa23000 CR3: 000000001e438000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seq_show+0x57d/0x6a0 fs/proc/fd.c:70 seq_read_iter+0x43e/0xd10 fs/seq_file.c:230 seq_read+0x28d/0x380 fs/seq_file.c:162 do_loop_readv_writev fs/read_write.c:755 [inline] do_iter_read+0x576/0xdc0 fs/read_write.c:797 vfs_readv fs/read_write.c:915 [inline] do_preadv+0x212/0x350 fs/read_write.c:1007 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f65ad07cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f65ab75c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f65ad19c050 RCX: 00007f65ad07cae9 RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000007 RBP: 00007f65ad0c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f65ad19c050 R15: 00007ffdf73c16d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:io_uring_show_fdinfo+0x391/0x1790 io_uring/fdinfo.c:96 Code: 00 00 00 42 80 3c 28 00 74 0f 48 8b 7c 24 30 e8 05 9f 21 f7 48 8b 4c 24 30 44 21 f3 48 c1 e3 02 48 03 19 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 64 02 00 00 8b 1b 89 df 44 89 f6 e8 f7 ca RSP: 0018:ffffc90015c6f780 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807b3d40d0 RDX: ffff88802615d940 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90015c6f8f8 R08: ffffffff8ac5982f R09: 1ffff1101097d013 R10: dffffc0000000000 R11: ffffed101097d014 R12: ffff88807eb515c8 R13: dffffc0000000000 R14: 0000000000003fff R15: 0000000000000001 FS: 00007f65ab75c6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f988fd78038 CR3: 000000001e438000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 42 80 add %al,-0x80(%rdx) 5: 3c 28 cmp $0x28,%al 7: 00 74 0f 48 add %dh,0x48(%rdi,%rcx,1) b: 8b 7c 24 30 mov 0x30(%rsp),%edi f: e8 05 9f 21 f7 call 0xf7219f19 14: 48 8b 4c 24 30 mov 0x30(%rsp),%rcx 19: 44 21 f3 and %r14d,%ebx 1c: 48 c1 e3 02 shl $0x2,%rbx 20: 48 03 19 add (%rcx),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 8a 04 28 mov (%rax,%r13,1),%al <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 64 02 00 00 jne 0x29a 36: 8b 1b mov (%rbx),%ebx 38: 89 df mov %ebx,%edi 3a: 44 89 f6 mov %r14d,%esi 3d: e8 .byte 0xe8 3e: f7 .byte 0xf7 3f: ca .byte 0xca