------------[ cut here ]------------
WARNING: CPU: 0 PID: 2971 at net/ipv4/tcp_input.c:2613 tcp_cwnd_reduction+0x321/0x380 net/ipv4/tcp_input.c:2613
Modules linked in:
CPU: 0 PID: 2971 Comm: systemd-udevd Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcp_cwnd_reduction+0x321/0x380 net/ipv4/tcp_input.c:2613
Code: 80 09 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 72 58 c6 f9 e8 6d 58 c6 f9 41 39 ec 41 0f 4e ec eb 89 e8 5f 58 c6 f9 <0f> 0b eb d6 e8 96 8a 0c fa e9 38 fd ff ff e8 8c 8a 0c fa e9 20 fe
RSP: 0018:ffffc90000007690 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88803d8a7100 RCX: 0000000000000100
RDX: ffff88801f35e140 RSI: ffffffff87b07a81 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87b077d8 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000004 R15: ffff88803d8a7100
FS: 00007fcbe0f308c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2dd2a000 CR3: 000000001f040000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
tcp_cong_control net/ipv4/tcp_input.c:3485 [inline]
tcp_ack+0x4160/0x5920 net/ipv4/tcp_input.c:3889
tcp_rcv_established+0x5d7/0x2130 net/ipv4/tcp_input.c:5936
tcp_v6_do_rcv+0x461/0x1320 net/ipv6/tcp_ipv6.c:1521
tcp_v6_rcv+0x236d/0x2cb0 net/ipv6/tcp_ipv6.c:1764
ip6_protocol_deliver_rcu+0x2e9/0x1ca0 net/ipv6/ip6_input.c:422
ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472
dst_input include/net/dst.h:460 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5462
__netif_receive_skb+0x24/0x1b0 net/core/dev.c:5576
process_backlog+0x2a5/0x6c0 net/core/dev.c:6452
__napi_poll+0xaf/0x440 net/core/dev.c:7020
napi_poll net/core/dev.c:7087 [inline]
net_rx_action+0x801/0xb40 net/core/dev.c:7174
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:kmem_cache_free.part.0+0xba/0x200 mm/slab.c:3743
Code: 00 84 c0 75 0e 4c 89 ea 4c 89 e6 48 89 ef e8 1d c0 ff ff 48 85 db 75 34 9c 58 f6 c4 02 0f 85 02 01 00 00 48 85 db 74 01 fb 5b <5d> 41 5c 41 5d c3 48 83 7d 50 00 0f 84 02 01 00 00 31 c9 eb b7 4c
RSP: 0018:ffffc90001b27cb0 EFLAGS: 00000206
RAX: 0000000000000006 RBX: ffff8880781ccee0 RCX: 1ffffffff1b21729
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88801150a600 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817d1748 R11: 000000000008808a R12: ffff8880781ccec0
R13: ffffffff81cc228e R14: ffffc90001b27d80 R15: 0000000000000000
putname fs/namei.c:270 [inline]
putname+0xfe/0x140 fs/namei.c:256
user_path_at_empty+0x4d/0x60 fs/namei.c:2803
user_path_at include/linux/namei.h:57 [inline]
vfs_statx+0x142/0x390 fs/stat.c:221
vfs_fstatat fs/stat.c:243 [inline]
vfs_lstat include/linux/fs.h:3358 [inline]
__do_sys_newlstat+0x91/0x110 fs/stat.c:398
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fcbdfda2335
Code: 69 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 8b 15 31 db 2b 00 f7 d8 64 89
RSP: 002b:00007ffc23c1fc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 0000563e9c75f250 RCX: 00007fcbdfda2335
RDX: 00007ffc23c1fc90 RSI: 00007ffc23c1fc90 RDI: 0000563e9c75e250
RBP: 00007ffc23c1fd50 R08: 00007fcbe0061198 R09: 0000000000001010
R10: 00007fcbe0060b58 R11: 0000000000000246 R12: 0000563e9c75e250
R13: 0000563e9c75e26a R14: 0000563e9c75c135 R15: 0000563e9c75c13a
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 84 c0 test %al,%al
2: 75 0e jne 0x12
4: 4c 89 ea mov %r13,%rdx
7: 4c 89 e6 mov %r12,%rsi
a: 48 89 ef mov %rbp,%rdi
d: e8 1d c0 ff ff callq 0xffffc02f
12: 48 85 db test %rbx,%rbx
15: 75 34 jne 0x4b
17: 9c pushfq
18: 58 pop %rax
19: f6 c4 02 test $0x2,%ah
1c: 0f 85 02 01 00 00 jne 0x124
22: 48 85 db test %rbx,%rbx
25: 74 01 je 0x28
27: fb sti
28: 5b pop %rbx
* 29: 5d pop %rbp <-- trapping instruction
2a: 41 5c pop %r12
2c: 41 5d pop %r13
2e: c3 retq
2f: 48 83 7d 50 00 cmpq $0x0,0x50(%rbp)
34: 0f 84 02 01 00 00 je 0x13c
3a: 31 c9 xor %ecx,%ecx
3c: eb b7 jmp 0xfffffff5
3e: 4c rex.WR