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: 1556 Comm: syz-executor.4 Not tainted 5.10.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_uring_show_cred+0x28b/0x4f0 fs/io_uring.c:8922
Code: 3c 28 00 74 08 48 89 df e8 12 35 dd ff 4c 8b 2b 4d 8d 75 04 4c 89 f1 48 c1 e9 03 48 b8 00 00 00 00 00 fc ff df 48 89 4c 24 10 <8a> 04 01 84 c0 0f 85 38 02 00 00 41 8b 2e 31 ff 89 ee e8 6e 47 9b
RSP: 0018:ffffc90008f1fb00 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: ffff8880251d9da0 RCX: 0000000000000000
RDX: 000000000000000a RSI: ffffffff899e84aa RDI: ffff88801c4300d8
RBP: ffff8880259d4178 R08: dffffc0000000000 R09: ffffed100388601b
R10: ffffed100388601b R11: 0000000000000000 R12: ffff888021e8d378
R13: 0000000000000000 R14: 0000000000000004 R15: ffff8880251d9d00
FS:  00007f95acefa700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000016a5374 CR3: 0000000081f17000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 idr_for_each+0x16b/0x260 lib/idr.c:208
 __io_uring_show_fdinfo fs/io_uring.c:8974 [inline]
 io_uring_show_fdinfo+0x63f/0x990 fs/io_uring.c:8996
 seq_show+0x559/0x610 fs/proc/fd.c:65
 seq_read+0x41a/0xcd0 fs/seq_file.c:208
 do_loop_readv_writev fs/read_write.c:761 [inline]
 do_iter_read+0x48e/0x660 fs/read_write.c:803
 vfs_readv fs/read_write.c:921 [inline]
 do_preadv+0x17b/0x290 fs/read_write.c:1013
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45deb9
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f95acef9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 0000000000025e40 RCX: 000000000045deb9
RDX: 0000000000000333 RSI: 00000000200017c0 RDI: 0000000000000007
RBP: 000000000118bf70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffc345f9b0f R14: 00007f95acefa9c0 R15: 000000000118bf2c
Modules linked in:
---[ end trace d5e139b1bc364175 ]---
RIP: 0010:io_uring_show_cred+0x28b/0x4f0 fs/io_uring.c:8922
Code: 3c 28 00 74 08 48 89 df e8 12 35 dd ff 4c 8b 2b 4d 8d 75 04 4c 89 f1 48 c1 e9 03 48 b8 00 00 00 00 00 fc ff df 48 89 4c 24 10 <8a> 04 01 84 c0 0f 85 38 02 00 00 41 8b 2e 31 ff 89 ee e8 6e 47 9b
RSP: 0018:ffffc90008f1fb00 EFLAGS: 00010247

RAX: dffffc0000000000 RBX: ffff8880251d9da0 RCX: 0000000000000000
RDX: 000000000000000a RSI: ffffffff899e84aa RDI: ffff88801c4300d8
RBP: ffff8880259d4178 R08: dffffc0000000000 R09: ffffed100388601b
R10: ffffed100388601b R11: 0000000000000000 R12: ffff888021e8d378
R13: 0000000000000000 R14: 0000000000000004 R15: ffff8880251d9d00
FS:  00007f95acefa700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f291317b000 CR3: 0000000081f17000 CR4: 00000000001506e0