------------[ cut here ]------------
WARNING: CPU: 0 PID: 18673 at net/ipv4/tcp_input.c:2613 tcp_cwnd_reduction+0x321/0x380 net/ipv4/tcp_input.c:2613
Modules linked in:
CPU: 0 PID: 18673 Comm: syz-executor.3 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: ffff88806bb10e80 RCX: 0000000000000100
RDX: ffff88808e18c2c0 RSI: ffffffff87b07a81 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87b077d8 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000004 R15: ffff88806bb10e80
FS: 00007f1f27605700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f27606000 CR3: 0000000023cff000 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:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: 48 89 ef 5d e9 a1 bc 45 00 5d be 03 00 00 00 e9 f6 b3 63 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 19 9d 8b 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc9000aaef3e0 EFLAGS: 00000216
RAX: 000000000000dd54 RBX: 0000000000000000 RCX: ffffc90010417000
RDX: 0000000000040000 RSI: ffffffff815e0a6c RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff74a07
R10: ffffffff815e0a62 R11: 0000000000000000 R12: ffffffff84d3d790
R13: 0000000000000200 R14: ffffc9000aaef440 R15: dffffc0000000000
console_unlock+0x6c2/0xb70 kernel/printk/printk.c:2716
vprintk_emit+0x198/0x4f0 kernel/printk/printk.c:2245
vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
_printk+0xba/0xed kernel/printk/printk.c:2266
btrfs_printk+0x3dd/0x425 fs/btrfs/super.c:248
device_list_add.cold+0x70/0x2ed fs/btrfs/volumes.c:946
btrfs_scan_one_device+0x4c7/0x5c0 fs/btrfs/volumes.c:1382
btrfs_mount_root+0x4b5/0xc10 fs/btrfs/super.c:1688
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
fc_mount fs/namespace.c:994 [inline]
vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1024
vfs_kern_mount+0x3c/0x60 fs/namespace.c:1011
btrfs_mount+0x234/0xa60 fs/btrfs/super.c:1786
legacy_get_tree+0x105/0x220 fs/fs_context.c:610
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3516
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: 0033:0x7f1f2a09101a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1f27604fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020001d80 RCX: 00007f1f2a09101a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f1f27605000
RBP: 00007f1f27605040 R08: 00007f1f27605040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f1f27605000 R15: 0000000020020600
----------------
Code disassembly (best guess):
0: 48 89 ef mov %rbp,%rdi
3: 5d pop %rbp
4: e9 a1 bc 45 00 jmpq 0x45bcaa
9: 5d pop %rbp
a: be 03 00 00 00 mov $0x3,%esi
f: e9 f6 b3 63 02 jmpq 0x263b40a
14: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
1a: 48 8b be b0 01 00 00 mov 0x1b0(%rsi),%rdi
21: e8 b4 ff ff ff callq 0xffffffda
26: 31 c0 xor %eax,%eax
28: c3 retq
29: 90 nop
* 2a: 65 8b 05 19 9d 8b 7e mov %gs:0x7e8b9d19(%rip),%eax # 0x7e8b9d4a <-- trapping instruction
31: 89 c1 mov %eax,%ecx
33: 48 8b 34 24 mov (%rsp),%rsi
37: 81 e1 00 01 00 00 and $0x100,%ecx
3d: 65 gs
3e: 48 rex.W
3f: 8b .byte 0x8b