general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 5053 Comm: sshd Not tainted 6.7.0-rc7-syzkaller-00016-gf5837722ffec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__fget_files_rcu fs/file.c:963 [inline]
RIP: 0010:__fget_files+0x96/0x340 fs/file.c:1022
Code: 89 f8 48 c1 e8 03 4c 01 f0 48 89 04 24 e8 62 86 92 ff 48 8b 04 24 80 38 00 0f 85 7f 02 00 00 4d 8b 65 58 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 70 02 00 00 41 8b 1c 24 89
RSP: 0018:ffffc9000331f8a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81f3df8d
RDX: ffff88802a5e2180 RSI: ffffffff81f3de1e RDI: 0000000000000001
RBP: 0000000000000004 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88807300f040 R14: dffffc0000000000 R15: ffff88807300f098
FS: 00007f9d8d382800(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005592de0c8df8 CR3: 000000001f753000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__fget fs/file.c:1030 [inline]
__fget_light+0xd0/0x260 fs/file.c:1137
fdget include/linux/file.h:64 [inline]
do_pollfd fs/select.c:866 [inline]
do_poll fs/select.c:921 [inline]
do_sys_poll+0x469/0xde0 fs/select.c:1015
__do_sys_ppoll fs/select.c:1121 [inline]
__se_sys_ppoll fs/select.c:1101 [inline]
__x64_sys_ppoll+0x256/0x2d0 fs/select.c:1101
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f9d8cf19ad5
Code: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffeaa4272d0 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: ffffffffffffffda RBX: 00000000000668a0 RCX: 00007f9d8cf19ad5
RDX: 00007ffeaa4272f0 RSI: 0000000000000004 RDI: 000055c03123eaa0
RBP: 000055c03123f260 R08: 0000000000000008 R09: 0000000000000000
R10: 00007ffeaa4273d8 R11: 0000000000000246 R12: 000055c02f66caa4
R13: 0000000000000001 R14: 000055c02f66d3e8 R15: 00007ffeaa427358
</TASK>
Modules linked in:
----------------
Code disassembly (best guess):
0: 89 f8 mov %edi,%eax
2: 48 c1 e8 03 shr $0x3,%rax
6: 4c 01 f0 add %r14,%rax
9: 48 89 04 24 mov %rax,(%rsp)
d: e8 62 86 92 ff call 0xff928674
12: 48 8b 04 24 mov (%rsp),%rax
16: 80 38 00 cmpb $0x0,(%rax)
19: 0f 85 7f 02 00 00 jne 0x29e
1f: 4d 8b 65 58 mov 0x58(%r13),%r12
23: 4c 89 e0 mov %r12,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 74 08 je 0x3b
33: 3c 03 cmp $0x3,%al
35: 0f 8e 70 02 00 00 jle 0x2ab
3b: 41 8b 1c 24 mov (%r12),%ebx
3f: 89 .byte 0x89