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Message-ID: <000000000000f1c03b05bc43aadc@google.com>
Date: Fri, 26 Feb 2021 13:08:20 -0800
From: syzbot <syzbot+506c8a2a115201881d45@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, mike.kravetz@...cle.com,
syzkaller-bugs@...glegroups.com
Subject: possible deadlock in sk_clone_lock
Hello,
syzbot found the following issue on:
HEAD commit: 577c2835 Add linux-next specific files for 20210224
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=137cef82d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=e9bb3d369b3bf49
dashboard link: https://syzkaller.appspot.com/bug?extid=506c8a2a115201881d45
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+506c8a2a115201881d45@...kaller.appspotmail.com
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.11.0-next-20210224-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.3/15411 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire:
ffffffff8c0a0e18 (hugetlb_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffffffff8c0a0e18 (hugetlb_lock){+.+.}-{2:2}, at: __free_huge_page+0x4cd/0xc10 mm/hugetlb.c:1390
and this task is already holding:
ffff88802391c720 (slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
ffff88802391c720 (slock-AF_INET){+.-.}-{2:2}, at: __tcp_close+0x6d9/0x1170 net/ipv4/tcp.c:2788
which would create a new lock dependency:
(slock-AF_INET){+.-.}-{2:2} -> (hugetlb_lock){+.+.}-{2:2}
but this new dependency connects a SOFTIRQ-irq-safe lock:
(slock-AF_INET){+.-.}-{2:2}
... which became SOFTIRQ-irq-safe at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sk_clone_lock+0x296/0x1070 net/core/sock.c:1913
inet_csk_clone_lock+0x21/0x4c0 net/ipv4/inet_connection_sock.c:830
tcp_create_openreq_child+0x30/0x16d0 net/ipv4/tcp_minisocks.c:460
tcp_v4_syn_recv_sock+0x10c/0x1460 net/ipv4/tcp_ipv4.c:1526
tcp_check_req+0x616/0x1860 net/ipv4/tcp_minisocks.c:772
tcp_v4_rcv+0x221a/0x3780 net/ipv4/tcp_ipv4.c:2001
ip_protocol_deliver_rcu+0x5c/0x8a0 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
NF_HOOK include/linux/netfilter.h:301 [inline]
NF_HOOK include/linux/netfilter.h:295 [inline]
ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:458 [inline]
ip_sublist_rcv_finish+0x9a/0x2c0 net/ipv4/ip_input.c:551
ip_list_rcv_finish.constprop.0+0x514/0x6e0 net/ipv4/ip_input.c:601
ip_sublist_rcv net/ipv4/ip_input.c:609 [inline]
ip_list_rcv+0x34e/0x490 net/ipv4/ip_input.c:644
__netif_receive_skb_list_ptype net/core/dev.c:5408 [inline]
__netif_receive_skb_list_core+0x549/0x8e0 net/core/dev.c:5456
__netif_receive_skb_list net/core/dev.c:5508 [inline]
netif_receive_skb_list_internal+0x777/0xd70 net/core/dev.c:5618
gro_normal_list net/core/dev.c:5772 [inline]
gro_normal_list net/core/dev.c:5768 [inline]
napi_complete_done+0x1f1/0x820 net/core/dev.c:6474
virtqueue_napi_complete+0x2c/0xc0 drivers/net/virtio_net.c:334
virtnet_poll+0xae2/0xd90 drivers/net/virtio_net.c:1455
__napi_poll+0xaf/0x440 net/core/dev.c:6892
napi_poll net/core/dev.c:6959 [inline]
net_rx_action+0x801/0xb40 net/core/dev.c:7036
__do_softirq+0x29b/0x9f6 kernel/softirq.c:345
invoke_softirq kernel/softirq.c:221 [inline]
__irq_exit_rcu kernel/softirq.c:422 [inline]
irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
common_interrupt+0xa4/0xd0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:623
tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission security/tomoyo/file.c:587 [inline]
tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
tomoyo_path_perm+0x39e/0x400 security/tomoyo/file.c:838
tomoyo_path_symlink+0x94/0xe0 security/tomoyo/tomoyo.c:200
security_path_symlink+0xdf/0x150 security/security.c:1119
do_symlinkat+0x123/0x300 fs/namei.c:4201
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
to a SOFTIRQ-irq-unsafe lock:
(hugetlb_lock){+.+.}-{2:2}
... which became SOFTIRQ-irq-unsafe at:
...
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
hugetlb_overcommit_handler+0x260/0x3e0 mm/hugetlb.c:3448
proc_sys_call_handler+0x336/0x610 fs/proc/proc_sysctl.c:591
call_write_iter include/linux/fs.h:1977 [inline]
new_sync_write+0x426/0x650 fs/read_write.c:519
vfs_write+0x796/0xa30 fs/read_write.c:606
ksys_write+0x12d/0x250 fs/read_write.c:659
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
other info that might help us debug this:
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(hugetlb_lock);
local_irq_disable();
lock(slock-AF_INET);
lock(hugetlb_lock);
<Interrupt>
lock(slock-AF_INET);
*** DEADLOCK ***
3 locks held by syz-executor.3/15411:
#0: ffff88802a56a190 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
#0: ffff88802a56a190 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:598
#1: ffff88802391c7a0 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1600 [inline]
#1: ffff88802391c7a0 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_close+0x1e/0xc0 net/ipv4/tcp.c:2866
#2: ffff88802391c720 (slock-AF_INET){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
#2: ffff88802391c720 (slock-AF_INET){+.-.}-{2:2}, at: __tcp_close+0x6d9/0x1170 net/ipv4/tcp.c:2788
the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (slock-AF_INET){+.-.}-{2:2} {
HARDIRQ-ON-W at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:359 [inline]
lock_sock_nested+0x40/0x120 net/core/sock.c:3063
lock_sock include/net/sock.h:1600 [inline]
inet_autobind+0x1a/0x190 net/ipv4/af_inet.c:180
inet_dgram_connect+0x1f5/0x2d0 net/ipv4/af_inet.c:578
__sys_connect_file+0x155/0x1a0 net/socket.c:1837
__sys_connect+0x161/0x190 net/socket.c:1854
__do_sys_connect net/socket.c:1864 [inline]
__se_sys_connect net/socket.c:1861 [inline]
__x64_sys_connect+0x6f/0xb0 net/socket.c:1861
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
IN-SOFTIRQ-W at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
sk_clone_lock+0x296/0x1070 net/core/sock.c:1913
inet_csk_clone_lock+0x21/0x4c0 net/ipv4/inet_connection_sock.c:830
tcp_create_openreq_child+0x30/0x16d0 net/ipv4/tcp_minisocks.c:460
tcp_v4_syn_recv_sock+0x10c/0x1460 net/ipv4/tcp_ipv4.c:1526
tcp_check_req+0x616/0x1860 net/ipv4/tcp_minisocks.c:772
tcp_v4_rcv+0x221a/0x3780 net/ipv4/tcp_ipv4.c:2001
ip_protocol_deliver_rcu+0x5c/0x8a0 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231
NF_HOOK include/linux/netfilter.h:301 [inline]
NF_HOOK include/linux/netfilter.h:295 [inline]
ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:458 [inline]
ip_sublist_rcv_finish+0x9a/0x2c0 net/ipv4/ip_input.c:551
ip_list_rcv_finish.constprop.0+0x514/0x6e0 net/ipv4/ip_input.c:601
ip_sublist_rcv net/ipv4/ip_input.c:609 [inline]
ip_list_rcv+0x34e/0x490 net/ipv4/ip_input.c:644
__netif_receive_skb_list_ptype net/core/dev.c:5408 [inline]
__netif_receive_skb_list_core+0x549/0x8e0 net/core/dev.c:5456
__netif_receive_skb_list net/core/dev.c:5508 [inline]
netif_receive_skb_list_internal+0x777/0xd70 net/core/dev.c:5618
gro_normal_list net/core/dev.c:5772 [inline]
gro_normal_list net/core/dev.c:5768 [inline]
napi_complete_done+0x1f1/0x820 net/core/dev.c:6474
virtqueue_napi_complete+0x2c/0xc0 drivers/net/virtio_net.c:334
virtnet_poll+0xae2/0xd90 drivers/net/virtio_net.c:1455
__napi_poll+0xaf/0x440 net/core/dev.c:6892
napi_poll net/core/dev.c:6959 [inline]
net_rx_action+0x801/0xb40 net/core/dev.c:7036
__do_softirq+0x29b/0x9f6 kernel/softirq.c:345
invoke_softirq kernel/softirq.c:221 [inline]
__irq_exit_rcu kernel/softirq.c:422 [inline]
irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
common_interrupt+0xa4/0xd0 arch/x86/kernel/irq.c:240
asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:623
tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission security/tomoyo/file.c:587 [inline]
tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
tomoyo_path_perm+0x39e/0x400 security/tomoyo/file.c:838
tomoyo_path_symlink+0x94/0xe0 security/tomoyo/tomoyo.c:200
security_path_symlink+0xdf/0x150 security/security.c:1119
do_symlinkat+0x123/0x300 fs/namei.c:4201
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:359 [inline]
lock_sock_nested+0x40/0x120 net/core/sock.c:3063
lock_sock include/net/sock.h:1600 [inline]
inet_autobind+0x1a/0x190 net/ipv4/af_inet.c:180
inet_dgram_connect+0x1f5/0x2d0 net/ipv4/af_inet.c:578
__sys_connect_file+0x155/0x1a0 net/socket.c:1837
__sys_connect+0x161/0x190 net/socket.c:1854
__do_sys_connect net/socket.c:1864 [inline]
__se_sys_connect net/socket.c:1861 [inline]
__x64_sys_connect+0x6f/0xb0 net/socket.c:1861
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
}
... key at: [<ffffffff901df860>] af_family_slock_keys+0x20/0x300
... acquired at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
__free_huge_page+0x4cd/0xc10 mm/hugetlb.c:1390
free_huge_page+0x31/0xb0 mm/hugetlb.c:1461
__put_page+0xf7/0x3e0 mm/swap.c:126
put_page include/linux/mm.h:1219 [inline]
__skb_frag_unref include/linux/skbuff.h:3085 [inline]
skb_release_data+0x465/0x750 net/core/skbuff.c:666
skb_release_all net/core/skbuff.c:725 [inline]
__kfree_skb+0x46/0x60 net/core/skbuff.c:739
sk_wmem_free_skb include/net/sock.h:1558 [inline]
tcp_rtx_queue_purge net/ipv4/tcp.c:2895 [inline]
tcp_write_queue_purge+0x44c/0x1250 net/ipv4/tcp.c:2908
tcp_v4_destroy_sock+0xf2/0x780 net/ipv4/tcp_ipv4.c:2219
inet_csk_destroy_sock+0x196/0x490 net/ipv4/inet_connection_sock.c:884
__tcp_close+0xd3e/0x1170 net/ipv4/tcp.c:2855
tcp_close+0x29/0xc0 net/ipv4/tcp.c:2867
inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
__sock_release+0xcd/0x280 net/socket.c:599
sock_close+0x18/0x20 net/socket.c:1258
__fput+0x288/0x920 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:140
get_signal+0x1c89/0x2100 kernel/signal.c:2554
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301
entry_SYSCALL_64_after_hwframe+0x44/0xae
the dependencies between the lock to be acquired
and SOFTIRQ-irq-unsafe lock:
-> (hugetlb_lock){+.+.}-{2:2} {
HARDIRQ-ON-W at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
hugetlb_overcommit_handler+0x260/0x3e0 mm/hugetlb.c:3448
proc_sys_call_handler+0x336/0x610 fs/proc/proc_sysctl.c:591
call_write_iter include/linux/fs.h:1977 [inline]
new_sync_write+0x426/0x650 fs/read_write.c:519
vfs_write+0x796/0xa30 fs/read_write.c:606
ksys_write+0x12d/0x250 fs/read_write.c:659
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
SOFTIRQ-ON-W at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
hugetlb_overcommit_handler+0x260/0x3e0 mm/hugetlb.c:3448
proc_sys_call_handler+0x336/0x610 fs/proc/proc_sysctl.c:591
call_write_iter include/linux/fs.h:1977 [inline]
new_sync_write+0x426/0x650 fs/read_write.c:519
vfs_write+0x796/0xa30 fs/read_write.c:606
ksys_write+0x12d/0x250 fs/read_write.c:659
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
INITIAL USE at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
hugetlb_overcommit_handler+0x260/0x3e0 mm/hugetlb.c:3448
proc_sys_call_handler+0x336/0x610 fs/proc/proc_sysctl.c:591
call_write_iter include/linux/fs.h:1977 [inline]
new_sync_write+0x426/0x650 fs/read_write.c:519
vfs_write+0x796/0xa30 fs/read_write.c:606
ksys_write+0x12d/0x250 fs/read_write.c:659
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
}
... key at: [<ffffffff8c0a0e18>] hugetlb_lock+0x18/0x4240
... acquired at:
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
__free_huge_page+0x4cd/0xc10 mm/hugetlb.c:1390
free_huge_page+0x31/0xb0 mm/hugetlb.c:1461
__put_page+0xf7/0x3e0 mm/swap.c:126
put_page include/linux/mm.h:1219 [inline]
__skb_frag_unref include/linux/skbuff.h:3085 [inline]
skb_release_data+0x465/0x750 net/core/skbuff.c:666
skb_release_all net/core/skbuff.c:725 [inline]
__kfree_skb+0x46/0x60 net/core/skbuff.c:739
sk_wmem_free_skb include/net/sock.h:1558 [inline]
tcp_rtx_queue_purge net/ipv4/tcp.c:2895 [inline]
tcp_write_queue_purge+0x44c/0x1250 net/ipv4/tcp.c:2908
tcp_v4_destroy_sock+0xf2/0x780 net/ipv4/tcp_ipv4.c:2219
inet_csk_destroy_sock+0x196/0x490 net/ipv4/inet_connection_sock.c:884
__tcp_close+0xd3e/0x1170 net/ipv4/tcp.c:2855
tcp_close+0x29/0xc0 net/ipv4/tcp.c:2867
inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
__sock_release+0xcd/0x280 net/socket.c:599
sock_close+0x18/0x20 net/socket.c:1258
__fput+0x288/0x920 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:140
get_signal+0x1c89/0x2100 kernel/signal.c:2554
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301
entry_SYSCALL_64_after_hwframe+0x44/0xae
stack backtrace:
CPU: 0 PID: 15411 Comm: syz-executor.3 Not tainted 5.11.0-next-20210224-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0xfa/0x151 lib/dump_stack.c:120
print_bad_irq_dependency kernel/locking/lockdep.c:2460 [inline]
check_irq_usage.cold+0x50d/0x744 kernel/locking/lockdep.c:2689
check_prev_add kernel/locking/lockdep.c:2940 [inline]
check_prevs_add kernel/locking/lockdep.c:3059 [inline]
validate_chain kernel/locking/lockdep.c:3674 [inline]
__lock_acquire+0x2b2c/0x54c0 kernel/locking/lockdep.c:4900
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
spin_lock include/linux/spinlock.h:354 [inline]
__free_huge_page+0x4cd/0xc10 mm/hugetlb.c:1390
free_huge_page+0x31/0xb0 mm/hugetlb.c:1461
__put_page+0xf7/0x3e0 mm/swap.c:126
put_page include/linux/mm.h:1219 [inline]
__skb_frag_unref include/linux/skbuff.h:3085 [inline]
skb_release_data+0x465/0x750 net/core/skbuff.c:666
skb_release_all net/core/skbuff.c:725 [inline]
__kfree_skb+0x46/0x60 net/core/skbuff.c:739
sk_wmem_free_skb include/net/sock.h:1558 [inline]
tcp_rtx_queue_purge net/ipv4/tcp.c:2895 [inline]
tcp_write_queue_purge+0x44c/0x1250 net/ipv4/tcp.c:2908
tcp_v4_destroy_sock+0xf2/0x780 net/ipv4/tcp_ipv4.c:2219
inet_csk_destroy_sock+0x196/0x490 net/ipv4/inet_connection_sock.c:884
__tcp_close+0xd3e/0x1170 net/ipv4/tcp.c:2855
tcp_close+0x29/0xc0 net/ipv4/tcp.c:2867
inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
__sock_release+0xcd/0x280 net/socket.c:599
sock_close+0x18/0x20 net/socket.c:1258
__fput+0x288/0x920 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:140
get_signal+0x1c89/0x2100 kernel/signal.c:2554
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ef9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbfc748c188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000005cd9 RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: ffffffffffffffd0 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00000000004bcd1c R08: 0000000000000000 R09: ffffffffffffff36
R10: 000000000401c005 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffde63b79bf R14: 00007fbfc748c300 R15: 0000000000022000
---
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