general protection fault, probably for non-canonical address 0xdffffc0000022103: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000000110818-0x000000000011081f]
CPU: 1 PID: 7786 Comm: kworker/u4:6 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:nfsd_reply_cache_free_locked+0x31/0x3b0 fs/nfsd/nfscache.c:123
Code: 54 49 89 fc 55 48 89 f5 53 48 89 d3 48 83 ec 08 e8 24 52 18 ff 48 8d 7d 61 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 c3 02 00 00
RSP: 0018:ffffc9000349fb68 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffff88807df59000 RCX: 0000000000000000
RDX: 0000000000022103 RSI: ffffffff825e9afc RDI: 0000000000110819
RBP: 00000000001107b8 R08: 0000000000000800 R09: ffffffff8fd019ef
R10: ffffffff825ea97e R11: 0000000000086089 R12: ffff888000110800
R13: 0000000000010800 R14: ffffed1000022101 R15: ffff888000110800
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558a78d9e3e8 CR3: 0000000082d63000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
nfsd_reply_cache_shutdown+0x153/0x2d0 fs/nfsd/nfscache.c:222
nfsd_exit_net+0x10e/0x4b0 fs/nfsd/nfsctl.c:1506
ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:591
process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace 047d3dcf9473cd65 ]---
RIP: 0010:nfsd_reply_cache_free_locked+0x31/0x3b0 fs/nfsd/nfscache.c:123
Code: 54 49 89 fc 55 48 89 f5 53 48 89 d3 48 83 ec 08 e8 24 52 18 ff 48 8d 7d 61 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 c3 02 00 00
RSP: 0018:ffffc9000349fb68 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffff88807df59000 RCX: 0000000000000000
RDX: 0000000000022103 RSI: ffffffff825e9afc RDI: 0000000000110819
RBP: 00000000001107b8 R08: 0000000000000800 R09: ffffffff8fd019ef
R10: ffffffff825ea97e R11: 0000000000086089 R12: ffff888000110800
R13: 0000000000010800 R14: ffffed1000022101 R15: ffff888000110800
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32128000 CR3: 000000007a575000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 54 push %rsp
1: 49 89 fc mov %rdi,%r12
4: 55 push %rbp
5: 48 89 f5 mov %rsi,%rbp
8: 53 push %rbx
9: 48 89 d3 mov %rdx,%rbx
c: 48 83 ec 08 sub $0x8,%rsp
10: e8 24 52 18 ff callq 0xff185239
15: 48 8d 7d 61 lea 0x61(%rbp),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 48 89 fa mov %rdi,%rdx
31: 83 e2 07 and $0x7,%edx
34: 38 d0 cmp %dl,%al
36: 7f 08 jg 0x40
38: 84 c0 test %al,%al
3a: 0f 85 c3 02 00 00 jne 0x303