Hello, syzbot found the following issue on: HEAD commit: f31817cbcf48 Add linux-next specific files for 20231116 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11a32f97680000 kernel config: https://syzkaller.appspot.com/x/.config?x=f59345f1d0a928c dashboard link: https://syzkaller.appspot.com/bug?extid=422ecd5adb35122711b7 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/987488cb251e/disk-f31817cb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6d4a82d8bd4b/vmlinux-f31817cb.xz kernel image: https://storage.googleapis.com/syzbot-assets/fc43dee9cb86/bzImage-f31817cb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+422ecd5adb35122711b7@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.7.0-rc1-next-20231116-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor.2/5088 [HC0[0]:SC0[2]:HE0:SE0] is trying to acquire: ffff888025d21bd8 (&sighand->siglock){+.+.}-{2:2}, at: __lock_task_sighand+0xc2/0x340 kernel/signal.c:1422 and this task is already holding: ffff88802dd927b0 (slock-AF_INET6){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff88802dd927b0 (slock-AF_INET6){+.-.}-{2:2}, at: __tcp_close+0x4e6/0xfd0 net/ipv4/tcp.c:2843 which would create a new lock dependency: (slock-AF_INET6){+.-.}-{2:2} -> (&sighand->siglock){+.+.}-{2:2} but this new dependency connects a SOFTIRQ-irq-safe lock: (slock-AF_INET6){+.-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] sctp_err_lookup+0x488/0xb50 net/sctp/input.c:523 sctp_v6_err+0x201/0x540 net/sctp/ipv6.c:175 icmpv6_notify+0x337/0x750 net/ipv6/icmp.c:867 icmpv6_rcv+0x882/0x19c0 net/ipv6/icmp.c:1013 ip6_protocol_deliver_rcu+0x170/0x13e0 net/ipv6/ip6_input.c:438 ip6_input_finish+0x14f/0x2f0 net/ipv6/ip6_input.c:483 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip6_input+0xa1/0xc0 net/ipv6/ip6_input.c:492 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ipv6_rcv+0x24e/0x380 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5529 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5643 process_backlog+0x101/0x6b0 net/core/dev.c:5971 __napi_poll.constprop.0+0xb4/0x540 net/core/dev.c:6533 napi_poll net/core/dev.c:6602 [inline] net_rx_action+0x956/0xe90 net/core/dev.c:6735 __do_softirq+0x216/0x8d5 kernel/softirq.c:553 do_softirq kernel/softirq.c:454 [inline] do_softirq+0xaa/0xe0 kernel/softirq.c:441 __local_bh_enable_ip+0xfc/0x120 kernel/softirq.c:381 local_bh_enable include/linux/bottom_half.h:33 [inline] icmp6_send+0x7d5/0x2b10 net/ipv6/icmp.c:633 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_pkt_drop+0x1f3/0x860 net/ipv6/route.c:4515 dst_output include/net/dst.h:451 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip6_xmit+0x1234/0x1cc0 net/ipv6/ip6_output.c:358 sctp_v6_xmit+0xc1b/0x1110 net/sctp/ipv6.c:248 sctp_packet_transmit+0x22e1/0x3020 net/sctp/output.c:653 sctp_packet_singleton+0x19f/0x370 net/sctp/outqueue.c:783 sctp_outq_flush_ctrl net/sctp/outqueue.c:914 [inline] sctp_outq_flush+0x54d/0x3340 net/sctp/outqueue.c:1212 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1818 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline] sctp_do_sm+0x178f/0x5c50 net/sctp/sm_sideeffect.c:1169 sctp_primitive_ASSOCIATE+0x9c/0xc0 net/sctp/primitive.c:73 __sctp_connect+0x9e9/0xc30 net/sctp/socket.c:1233 sctp_connect net/sctp/socket.c:4811 [inline] sctp_inet_connect+0x15f/0x1f0 net/sctp/socket.c:4826 __sys_connect_file+0x15b/0x1a0 net/socket.c:2046 __sys_connect+0x145/0x170 net/socket.c:2063 __do_sys_connect net/socket.c:2073 [inline] __se_sys_connect net/socket.c:2070 [inline] __x64_sys_connect+0x72/0xb0 net/socket.c:2070 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a to a SOFTIRQ-irq-unsafe lock: (&sighand->siglock){+.+.}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] class_spinlock_constructor include/linux/spinlock.h:530 [inline] ptrace_set_stopped kernel/ptrace.c:391 [inline] ptrace_attach+0x401/0x650 kernel/ptrace.c:478 __do_sys_ptrace+0x204/0x230 kernel/ptrace.c:1290 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sighand->siglock); local_irq_disable(); lock(slock-AF_INET6); lock(&sighand->siglock); <Interrupt> lock(slock-AF_INET6); *** DEADLOCK *** 5 locks held by syz-executor.2/5088: #0: ffff888078a5dc10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #0: ffff888078a5dc10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x260 net/socket.c:658 #1: ffff88802dd92830 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1720 [inline] #1: ffff88802dd92830 (sk_lock-AF_INET6){+.+.}-{0:0}, at: tcp_close+0x1d/0xc0 net/ipv4/tcp.c:2920 #2: ffff88802dd927b0 (slock-AF_INET6){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff88802dd927b0 (slock-AF_INET6){+.-.}-{2:2}, at: __tcp_close+0x4e6/0xfd0 net/ipv4/tcp.c:2843 #3: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #3: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #3: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2310 [inline] #3: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0xe4/0x410 kernel/trace/bpf_trace.c:2350 #4: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #4: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #4: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: __lock_task_sighand+0x3f/0x340 kernel/signal.c:1405 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (slock-AF_INET6){+.-.}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x5f/0xf0 net/core/sock.c:3522 lock_sock include/net/sock.h:1720 [inline] udpv6_destroy_sock+0x1c/0x240 net/ipv6/udp.c:1663 sk_common_release+0x68/0x3a0 net/core/sock.c:3718 inet_release+0x132/0x270 net/ipv4/af_inet.c:433 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:485 __sock_release+0xae/0x260 net/socket.c:659 sock_close+0x1c/0x20 net/socket.c:1419 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x86/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] sctp_err_lookup+0x488/0xb50 net/sctp/input.c:523 sctp_v6_err+0x201/0x540 net/sctp/ipv6.c:175 icmpv6_notify+0x337/0x750 net/ipv6/icmp.c:867 icmpv6_rcv+0x882/0x19c0 net/ipv6/icmp.c:1013 ip6_protocol_deliver_rcu+0x170/0x13e0 net/ipv6/ip6_input.c:438 ip6_input_finish+0x14f/0x2f0 net/ipv6/ip6_input.c:483 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip6_input+0xa1/0xc0 net/ipv6/ip6_input.c:492 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ipv6_rcv+0x24e/0x380 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5529 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5643 process_backlog+0x101/0x6b0 net/core/dev.c:5971 __napi_poll.constprop.0+0xb4/0x540 net/core/dev.c:6533 napi_poll net/core/dev.c:6602 [inline] net_rx_action+0x956/0xe90 net/core/dev.c:6735 __do_softirq+0x216/0x8d5 kernel/softirq.c:553 do_softirq kernel/softirq.c:454 [inline] do_softirq+0xaa/0xe0 kernel/softirq.c:441 __local_bh_enable_ip+0xfc/0x120 kernel/softirq.c:381 local_bh_enable include/linux/bottom_half.h:33 [inline] icmp6_send+0x7d5/0x2b10 net/ipv6/icmp.c:633 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_pkt_drop+0x1f3/0x860 net/ipv6/route.c:4515 dst_output include/net/dst.h:451 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip6_xmit+0x1234/0x1cc0 net/ipv6/ip6_output.c:358 sctp_v6_xmit+0xc1b/0x1110 net/sctp/ipv6.c:248 sctp_packet_transmit+0x22e1/0x3020 net/sctp/output.c:653 sctp_packet_singleton+0x19f/0x370 net/sctp/outqueue.c:783 sctp_outq_flush_ctrl net/sctp/outqueue.c:914 [inline] sctp_outq_flush+0x54d/0x3340 net/sctp/outqueue.c:1212 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1818 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline] sctp_do_sm+0x178f/0x5c50 net/sctp/sm_sideeffect.c:1169 sctp_primitive_ASSOCIATE+0x9c/0xc0 net/sctp/primitive.c:73 __sctp_connect+0x9e9/0xc30 net/sctp/socket.c:1233 sctp_connect net/sctp/socket.c:4811 [inline] sctp_inet_connect+0x15f/0x1f0 net/sctp/socket.c:4826 __sys_connect_file+0x15b/0x1a0 net/socket.c:2046 __sys_connect+0x145/0x170 net/socket.c:2063 __do_sys_connect net/socket.c:2073 [inline] __se_sys_connect net/socket.c:2070 [inline] __x64_sys_connect+0x72/0xb0 net/socket.c:2070 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x5f/0xf0 net/core/sock.c:3522 lock_sock include/net/sock.h:1720 [inline] udpv6_destroy_sock+0x1c/0x240 net/ipv6/udp.c:1663 sk_common_release+0x68/0x3a0 net/core/sock.c:3718 inet_release+0x132/0x270 net/ipv4/af_inet.c:433 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:485 __sock_release+0xae/0x260 net/socket.c:659 sock_close+0x1c/0x20 net/socket.c:1419 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x86/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a } ... key at: [<ffffffff92b36fc0>] af_family_slock_keys+0xa0/0x300 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (&sighand->siglock){+.+.}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] class_spinlock_constructor include/linux/spinlock.h:530 [inline] ptrace_set_stopped kernel/ptrace.c:391 [inline] ptrace_attach+0x401/0x650 kernel/ptrace.c:478 __do_sys_ptrace+0x204/0x230 kernel/ptrace.c:1290 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a SOFTIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] class_spinlock_constructor include/linux/spinlock.h:530 [inline] ptrace_set_stopped kernel/ptrace.c:391 [inline] ptrace_attach+0x401/0x650 kernel/ptrace.c:478 __do_sys_ptrace+0x204/0x230 kernel/ptrace.c:1290 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:376 [inline] calculate_sigpending+0x44/0xa0 kernel/signal.c:197 ret_from_fork+0x23/0x80 arch/x86/kernel/process.c:143 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 } ... key at: [<ffffffff90b49f80>] __key.341+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 __lock_task_sighand+0xc2/0x340 kernel/signal.c:1422 lock_task_sighand include/linux/sched/signal.h:748 [inline] do_send_sig_info kernel/signal.c:1309 [inline] group_send_sig_info+0x288/0x300 kernel/signal.c:1460 bpf_send_signal_common+0x2e4/0x3a0 kernel/trace/bpf_trace.c:877 ____bpf_send_signal kernel/trace/bpf_trace.c:882 [inline] bpf_send_signal+0x19/0x20 kernel/trace/bpf_trace.c:880 bpf_prog_9fbc3d1d47c9b36c+0x22/0x29 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline] __bpf_prog_run include/linux/filter.h:651 [inline] bpf_prog_run include/linux/filter.h:658 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2311 [inline] bpf_trace_run2+0x14e/0x410 kernel/trace/bpf_trace.c:2350 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0xf6/0x150 mm/slab_common.c:1043 tcp_saved_syn_free include/linux/tcp.h:568 [inline] tcp_v4_destroy_sock+0x256/0x560 net/ipv4/tcp_ipv4.c:2538 inet_csk_destroy_sock+0x19a/0x450 net/ipv4/inet_connection_sock.c:1198 __tcp_close+0xbf0/0xfd0 net/ipv4/tcp.c:2909 tcp_close+0x2d/0xc0 net/ipv4/tcp.c:2921 inet_release+0x132/0x270 net/ipv4/af_inet.c:433 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:485 __sock_release+0xae/0x260 net/socket.c:659 sock_close+0x1c/0x20 net/socket.c:1419 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x86/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a stack backtrace: CPU: 1 PID: 5088 Comm: syz-executor.2 Not tainted 6.7.0-rc1-next-20231116-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage+0xe18/0x1470 kernel/locking/lockdep.c:2865 check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x247c/0x3b10 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x530 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 __lock_task_sighand+0xc2/0x340 kernel/signal.c:1422 lock_task_sighand include/linux/sched/signal.h:748 [inline] do_send_sig_info kernel/signal.c:1309 [inline] group_send_sig_info+0x288/0x300 kernel/signal.c:1460 bpf_send_signal_common+0x2e4/0x3a0 kernel/trace/bpf_trace.c:877 ____bpf_send_signal kernel/trace/bpf_trace.c:882 [inline] bpf_send_signal+0x19/0x20 kernel/trace/bpf_trace.c:880 bpf_prog_9fbc3d1d47c9b36c+0x22/0x29 bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline] __bpf_prog_run include/linux/filter.h:651 [inline] bpf_prog_run include/linux/filter.h:658 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2311 [inline] bpf_trace_run2+0x14e/0x410 kernel/trace/bpf_trace.c:2350 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0xf6/0x150 mm/slab_common.c:1043 tcp_saved_syn_free include/linux/tcp.h:568 [inline] tcp_v4_destroy_sock+0x256/0x560 net/ipv4/tcp_ipv4.c:2538 inet_csk_destroy_sock+0x19a/0x450 net/ipv4/inet_connection_sock.c:1198 __tcp_close+0xbf0/0xfd0 net/ipv4/tcp.c:2909 tcp_close+0x2d/0xc0 net/ipv4/tcp.c:2921 inet_release+0x132/0x270 net/ipv4/af_inet.c:433 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:485 __sock_release+0xae/0x260 net/socket.c:659 sock_close+0x1c/0x20 net/socket.c:1419 __fput+0x270/0xbb0 fs/file_table.c:394 __fput_sync+0x47/0x50 fs/file_table.c:475 __do_sys_close fs/open.c:1590 [inline] __se_sys_close fs/open.c:1575 [inline] __x64_sys_close+0x86/0xf0 fs/open.c:1575 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a RIP: 0033:0x7f4f6907b9da Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007ffe444ef290 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4f6907b9da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffe444ef30c R08: 00000000000003b8 R09: 0079746972756365 R10: 00007f4f691786a0 R11: 0000000000000293 R12: 0000000000000032 R13: 00000000000aa51e R14: 00000000000aa4b4 R15: 0000000000000002 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
