BUG: sleeping function called from invalid context at ./include/linux/percpu-rwsem.h:34 in_atomic(): 1, irqs_disabled(): 0, pid: 3065, name: syz-executor1 2 locks held by syz-executor1/3065: #0: (&net->xfrm.xfrm_cfg_mutex){+.+.}, at: [<0000000091b33958>] xfrm_netlink_rcv+0x60/0x90 net/xfrm/xfrm_user.c:2598 #1: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...}, at: [<0000000024b37c2b>] spin_lock_bh include/linux/spinlock.h:315 [inline] #1: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...}, at: [<0000000024b37c2b>] xfrm_policy_flush+0x5d3/0x770 net/xfrm/xfrm_policy.c:969 CPU: 1 PID: 3065 Comm: syz-executor1 Not tainted 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6060 __might_sleep+0x95/0x190 kernel/sched/core.c:6013 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:34 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x1c/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] xfrm_policy_cache_flush+0x1d0/0x710 net/xfrm/xfrm_policy.c:1767 xfrm_policy_flush+0x650/0x770 net/xfrm/xfrm_policy.c:978 xfrm_flush_policy+0x153/0x440 net/xfrm/xfrm_user.c:2061 xfrm_user_rcv_msg+0x422/0x860 net/xfrm/xfrm_user.c:2591 netlink_rcv_skb+0x224/0x470 net/netlink/af_netlink.c:2441 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2599 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f5f476b1c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 0000000020007fc8 RDI: 0000000000000013 RBP: 00000000000003a3 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f37e8 R13: 00000000ffffffff R14: 00007f5f476b26d4 R15: 0000000000000000 ===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 4.15.0-rc5+ #177 Tainted: G W ----------------------------------------------------- syz-executor1/3065 [HC0[0]:SC0[2]:HE1:SE0] is trying to acquire: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000000594f0bc>] get_online_cpus include/linux/cpu.h:117 [inline] (cpu_hotplug_lock.rw_sem){++++}, at: [<000000000594f0bc>] xfrm_policy_cache_flush+0x1d0/0x710 net/xfrm/xfrm_policy.c:1767 and this task is already holding: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...}, at: [<0000000024b37c2b>] spin_lock_bh include/linux/spinlock.h:315 [inline] (&(&net->xfrm.xfrm_policy_lock)->rlock){+...}, at: [<0000000024b37c2b>] xfrm_policy_flush+0x5d3/0x770 net/xfrm/xfrm_policy.c:969 which would create a new lock dependency: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...} -> (cpu_hotplug_lock.rw_sem){++++} but this new dependency connects a SOFTIRQ-irq-safe lock: (slock-AF_INET6){+.-.} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] sctp_generate_timeout_event+0x73/0x320 net/sctp/sm_sideeffect.c:292 sctp_generate_t1_init_event+0x1e/0x30 net/sctp/sm_sideeffect.c:336 call_timer_fn+0x228/0x820 kernel/time/timer.c:1320 expire_timers kernel/time/timer.c:1357 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1660 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1686 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:540 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:904 memcmp+0xb3/0x160 lib/string.c:861 find_stack lib/stackdepot.c:176 [inline] depot_save_stack+0x12c/0x490 lib/stackdepot.c:225 save_stack+0xa3/0xd0 mm/kasan/kasan.c:453 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc_node mm/slab.c:3325 [inline] kmem_cache_alloc_node+0x131/0x760 mm/slab.c:3632 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:983 [inline] alloc_skb_with_frags+0x10d/0x750 net/core/skbuff.c:5151 sock_alloc_send_pskb+0x787/0x9b0 net/core/sock.c:2088 unix_dgram_sendmsg+0x52d/0x1610 net/unix/af_unix.c:1682 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x320/0x8b0 net/socket.c:2018 __sys_sendmmsg+0x1ee/0x620 net/socket.c:2108 SYSC_sendmmsg net/socket.c:2139 [inline] SyS_sendmmsg+0x35/0x60 net/socket.c:2134 entry_SYSCALL_64_fastpath+0x23/0x9a to a SOFTIRQ-irq-unsafe lock: (cpu_hotplug_lock.rw_sem){++++} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 down_write+0x87/0x120 kernel/locking/rwsem.c:70 percpu_down_write+0xa3/0x500 kernel/locking/percpu-rwsem.c:145 cpus_write_lock kernel/cpu.c:305 [inline] _cpu_up+0x60/0x510 kernel/cpu.c:990 do_cpu_up+0x73/0xa0 kernel/cpu.c:1066 cpu_up+0x18/0x20 kernel/cpu.c:1074 smp_init+0x13a/0x152 kernel/smp.c:578 kernel_init_freeable+0x2fe/0x521 init/main.c:1064 kernel_init+0x13/0x172 init/main.c:996 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515 other info that might help us debug this: Chain exists of: slock-AF_INET6 --> &(&net->xfrm.xfrm_policy_lock)->rlock --> cpu_hotplug_lock.rw_sem Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(cpu_hotplug_lock.rw_sem); local_irq_disable(); lock(slock-AF_INET6); lock(&(&net->xfrm.xfrm_policy_lock)->rlock); lock(slock-AF_INET6); *** DEADLOCK *** 2 locks held by syz-executor1/3065: #0: (&net->xfrm.xfrm_cfg_mutex){+.+.}, at: [<0000000091b33958>] xfrm_netlink_rcv+0x60/0x90 net/xfrm/xfrm_user.c:2598 #1: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...}, at: [<0000000024b37c2b>] spin_lock_bh include/linux/spinlock.h:315 [inline] #1: (&(&net->xfrm.xfrm_policy_lock)->rlock){+...}, at: [<0000000024b37c2b>] xfrm_policy_flush+0x5d3/0x770 net/xfrm/xfrm_policy.c:969 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (slock-AF_INET6){+.-.} ops: 180593 { HARDIRQ-ON-W at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:315 [inline] lock_sock_nested+0x44/0x110 net/core/sock.c:2772 lock_sock include/net/sock.h:1462 [inline] sock_setsockopt+0x16b/0x1af0 net/core/sock.c:717 SYSC_setsockopt net/socket.c:1817 [inline] SyS_setsockopt+0x2ff/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a IN-SOFTIRQ-W at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] sctp_generate_timeout_event+0x73/0x320 net/sctp/sm_sideeffect.c:292 sctp_generate_t1_init_event+0x1e/0x30 net/sctp/sm_sideeffect.c:336 call_timer_fn+0x228/0x820 kernel/time/timer.c:1320 expire_timers kernel/time/timer.c:1357 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1660 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1686 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:540 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:904 memcmp+0xb3/0x160 lib/string.c:861 find_stack lib/stackdepot.c:176 [inline] depot_save_stack+0x12c/0x490 lib/stackdepot.c:225 save_stack+0xa3/0xd0 mm/kasan/kasan.c:453 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc_node mm/slab.c:3325 [inline] kmem_cache_alloc_node+0x131/0x760 mm/slab.c:3632 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:983 [inline] alloc_skb_with_frags+0x10d/0x750 net/core/skbuff.c:5151 sock_alloc_send_pskb+0x787/0x9b0 net/core/sock.c:2088 unix_dgram_sendmsg+0x52d/0x1610 net/unix/af_unix.c:1682 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x320/0x8b0 net/socket.c:2018 __sys_sendmmsg+0x1ee/0x620 net/socket.c:2108 SYSC_sendmmsg net/socket.c:2139 [inline] SyS_sendmmsg+0x35/0x60 net/socket.c:2134 entry_SYSCALL_64_fastpath+0x23/0x9a INITIAL USE at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:315 [inline] lock_sock_nested+0x44/0x110 net/core/sock.c:2772 lock_sock include/net/sock.h:1462 [inline] sock_setsockopt+0x16b/0x1af0 net/core/sock.c:717 SYSC_setsockopt net/socket.c:1817 [inline] SyS_setsockopt+0x2ff/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a } ... key at: [<0000000048266737>] af_family_slock_keys+0x50/0x180 ... acquired at: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:315 [inline] xfrm_policy_delete+0x3e/0x90 net/xfrm/xfrm_policy.c:1247 xfrm_sk_free_policy include/net/xfrm.h:1261 [inline] inet_csk_destroy_sock+0x2bf/0x3f0 net/ipv4/inet_connection_sock.c:836 tcp_close+0x8ad/0xfc0 net/ipv4/tcp.c:2312 inet_release+0xed/0x1c0 net/ipv4/af_inet.c:427 inet6_release+0x50/0x70 net/ipv6/af_inet6.c:432 sock_release+0x8d/0x1e0 net/socket.c:593 sock_close+0x16/0x20 net/socket.c:1121 __fput+0x327/0x7e0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x199/0x270 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x296/0x310 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264 entry_SYSCALL_64_fastpath+0x98/0x9a -> (&(&net->xfrm.xfrm_policy_lock)->rlock){+...} ops: 1287 { HARDIRQ-ON-W at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:315 [inline] xfrm_policy_byid+0x89/0x3c0 net/xfrm/xfrm_policy.c:850 xfrm_get_policy+0x663/0x10e0 net/xfrm/xfrm_user.c:1806 xfrm_user_rcv_msg+0x422/0x860 net/xfrm/xfrm_user.c:2591 netlink_rcv_skb+0x224/0x470 net/netlink/af_netlink.c:2441 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2599 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a INITIAL USE at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:315 [inline] xfrm_policy_byid+0x89/0x3c0 net/xfrm/xfrm_policy.c:850 xfrm_get_policy+0x663/0x10e0 net/xfrm/xfrm_user.c:1806 xfrm_user_rcv_msg+0x422/0x860 net/xfrm/xfrm_user.c:2591 netlink_rcv_skb+0x224/0x470 net/netlink/af_netlink.c:2441 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2599 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a } ... key at: [<00000000609eb1d2>] __key.66927+0x0/0x40 ... acquired at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] xfrm_policy_cache_flush+0x1d0/0x710 net/xfrm/xfrm_policy.c:1767 xfrm_policy_flush+0x650/0x770 net/xfrm/xfrm_policy.c:978 xfrm_flush_policy+0x153/0x440 net/xfrm/xfrm_user.c:2061 xfrm_user_rcv_msg+0x422/0x860 net/xfrm/xfrm_user.c:2591 netlink_rcv_skb+0x224/0x470 net/netlink/af_netlink.c:2441 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2599 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (cpu_hotplug_lock.rw_sem){++++} ops: 2329 { HARDIRQ-ON-W at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 down_write+0x87/0x120 kernel/locking/rwsem.c:70 percpu_down_write+0xa3/0x500 kernel/locking/percpu-rwsem.c:145 cpus_write_lock kernel/cpu.c:305 [inline] _cpu_up+0x60/0x510 kernel/cpu.c:990 do_cpu_up+0x73/0xa0 kernel/cpu.c:1066 cpu_up+0x18/0x20 kernel/cpu.c:1074 smp_init+0x13a/0x152 kernel/smp.c:578 kernel_init_freeable+0x2fe/0x521 init/main.c:1064 kernel_init+0x13/0x172 init/main.c:996 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515 HARDIRQ-ON-R at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] kmem_cache_create+0x26/0x2a0 mm/slab_common.c:440 debug_objects_mem_init+0xda/0x910 lib/debugobjects.c:1139 start_kernel+0x6dd/0x819 init/main.c:671 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 SOFTIRQ-ON-W at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 down_write+0x87/0x120 kernel/locking/rwsem.c:70 percpu_down_write+0xa3/0x500 kernel/locking/percpu-rwsem.c:145 cpus_write_lock kernel/cpu.c:305 [inline] _cpu_up+0x60/0x510 kernel/cpu.c:990 do_cpu_up+0x73/0xa0 kernel/cpu.c:1066 cpu_up+0x18/0x20 kernel/cpu.c:1074 smp_init+0x13a/0x152 kernel/smp.c:578 kernel_init_freeable+0x2fe/0x521 init/main.c:1064 kernel_init+0x13/0x172 init/main.c:996 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:515 SOFTIRQ-ON-R at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] kmem_cache_create+0x26/0x2a0 mm/slab_common.c:440 debug_objects_mem_init+0xda/0x910 lib/debugobjects.c:1139 start_kernel+0x6dd/0x819 init/main.c:671 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 INITIAL USE at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock kernel/cpu.c:293 [inline] __cpuhp_setup_state+0x60/0x140 kernel/cpu.c:1670 cpuhp_setup_state_nocalls include/linux/cpuhotplug.h:229 [inline] kvm_guest_init+0x1f3/0x20f arch/x86/kernel/kvm.c:528 setup_arch+0x17e8/0x1a02 arch/x86/kernel/setup.c:1266 start_kernel+0xcd/0x819 init/main.c:532 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 } ... key at: [<000000000a4f6ff1>] cpu_hotplug_lock+0xd8/0x140 ... acquired at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] xfrm_policy_cache_flush+0x1d0/0x710 net/xfrm/xfrm_policy.c:1767 xfrm_policy_flush+0x650/0x770 net/xfrm/xfrm_policy.c:978 xfrm_flush_policy+0x153/0x440 net/xfrm/xfrm_user.c:2061 xfrm_user_rcv_msg+0x422/0x860 net/xfrm/xfrm_user.c:2591 netlink_rcv_skb+0x224/0x470 net/netlink/af_netlink.c:2441 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2599 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a stack backtrace: CPU: 1 PID: 3065 Comm: syz-executor1 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_bad_irq_dependency kernel/locking/lockdep.c:1565 [inline] check_usage+0xad0/0xb60 kernel/locking/lockdep.c:1597 check_irq_usage kernel/locking/lockdep.c:1653 [inline] check_prev_add_irq kernel/locking/lockdep_states.h:8 [inline] check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1971 [inline] validate_chain kernel/locking/lockdep.c:2412 [inline] __lock_acquire+0x2bd1/0x3e00 kernel/locking/lockdep.c:3426 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:293 get_online_cpus include/linux/cpu.h:117 [inline] xfrm_policy_cache_flush+0x1d0/0x710 net/xfrm/xfrm_policy.c:1767 xfrm_policy_flush+0x650/0x770 net/xfrm/xfrm_policy.c:978 xfrm_flush_policy+0x153/0x440 net/xfrm/xfrm_user.c:2061 xfrm_user_rcv_msg+0x422/0x860 net/xfrm/xfrm_user.c:2591 netlink_rcv_skb+0x224/0x470 net/netlink/af_netlink.c:2441 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2599 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f5f476b1c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 0000000020007fc8 RDI: 0000000000000013 RBP: 00000000000003a3 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f37e8 R13: 00000000ffffffff R14: 00007f5f476b26d4 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 3677 Comm: syz-executor7 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3542 dst_alloc+0x11f/0x1a0 net/core/dst.c:104 rt_dst_alloc+0xe9/0x520 net/ipv4/route.c:1500 __mkroute_output net/ipv4/route.c:2242 [inline] ip_route_output_key_hash_rcu+0xa40/0x2c20 net/ipv4/route.c:2470 ip_route_output_key_hash+0x20b/0x370 net/ipv4/route.c:2299 __ip_route_output_key include/net/route.h:125 [inline] ip_route_output_flow+0x26/0xa0 net/ipv4/route.c:2553 udp_sendmsg+0x19d3/0x2ce0 net/ipv4/udp.c:999 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 SYSC_sendto+0x361/0x5c0 net/socket.c:1719 SyS_sendto+0x40/0x50 net/socket.c:1687 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f73f76fdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f73f76fdaa0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 0000000020dcfffe RDI: 0000000000000013 RBP: 00007f73f76fda90 R08: 0000000020514ff0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007f73f76fdbc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 3830 Comm: syz-executor4 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3632 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb_fclone include/linux/skbuff.h:1025 [inline] tipc_buf_acquire+0x2d/0xf0 net/tipc/msg.c:66 tipc_msg_build+0xfa/0x1220 net/tipc/msg.c:277 __tipc_sendmsg+0xb92/0x1b40 net/tipc/socket.c:1349 __tipc_sendstream+0x906/0xc20 net/tipc/socket.c:1409 tipc_sendstream+0x50/0x70 net/tipc/socket.c:1383 tipc_send_packet+0x33/0x50 net/tipc/socket.c:1457 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f951a9dfc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f951a9dfaa0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 00000000200d1000 RDI: 0000000000000013 RBP: 00007f951a9dfa90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007f951a9dfbc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 4352 Comm: syz-executor1 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3608 kmalloc include/linux/slab.h:499 [inline] ip_ra_control+0x4a9/0x5c0 net/ipv4/ip_sockglue.c:354 ip_mroute_setsockopt+0x9ef/0xf20 net/ipv4/ipmr.c:1485 do_ip_setsockopt.isra.12+0x2a7/0x3160 net/ipv4/ip_sockglue.c:641 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1248 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:855 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f5f476b1c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f5f476b1aa0 RCX: 0000000000452ac9 RDX: 00000000000000c8 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00007f5f476b1a90 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007f5f476b1bc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 4370 Comm: syz-executor1 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3632 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:983 [inline] nlmsg_new include/net/netlink.h:511 [inline] inet_netconf_notify_devconf+0xb4/0x1d0 net/ipv4/devinet.c:1890 ip_mroute_setsockopt+0xcd6/0xf20 net/ipv4/ipmr.c:1489 do_ip_setsockopt.isra.12+0x2a7/0x3160 net/ipv4/ip_sockglue.c:641 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1248 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:855 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f5f476b1c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f5f476b1aa0 RCX: 0000000000452ac9 RDX: 00000000000000c8 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00007f5f476b1a90 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007f5f476b1bc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 4414 Comm: syz-executor1 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node_trace+0x5a/0x750 mm/slab.c:3651 __do_kmalloc_node mm/slab.c:3671 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3686 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:983 [inline] nlmsg_new include/net/netlink.h:511 [inline] inet_netconf_notify_devconf+0xb4/0x1d0 net/ipv4/devinet.c:1890 ip_mroute_setsockopt+0xcd6/0xf20 net/ipv4/ipmr.c:1489 do_ip_setsockopt.isra.12+0x2a7/0x3160 net/ipv4/ip_sockglue.c:641 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1248 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:855 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f5f476b1c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f5f476b1aa0 RCX: 0000000000452ac9 RDX: 00000000000000c8 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00007f5f476b1a90 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007f5f476b1bc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 4456 Comm: syz-executor3 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] __do_kmalloc mm/slab.c:3706 [inline] __kmalloc+0x63/0x760 mm/slab.c:3717 kmalloc include/linux/slab.h:504 [inline] kzalloc include/linux/slab.h:688 [inline] ip_options_get_alloc net/ipv4/ip_options.c:511 [inline] ip_options_get_from_user+0x38/0xd0 net/ipv4/ip_options.c:533 do_ip_setsockopt.isra.12+0x18a0/0x3160 net/ipv4/ip_sockglue.c:655 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1248 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2388 ipv6_setsockopt+0xa0/0x150 net/ipv6/ipv6_sockglue.c:917 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1422 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1821 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1800 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007feab24a7c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007feab24a7aa0 RCX: 0000000000452ac9 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00007feab24a7a90 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000206d3000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007feab24a7bc8 R14: 00000000004b767a R15: 0000000000000000 CPU: 0 PID: 4449 Comm: syz-executor6 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3368 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3542 kmem_cache_zalloc include/linux/slab.h:678 [inline] ebitmap_cpy+0xce/0x260 security/selinux/ss/ebitmap.c:60 mls_context_cpy security/selinux/ss/context.h:51 [inline] mls_compute_sid+0x555/0x930 security/selinux/ss/mls.c:556 security_compute_sid+0x8df/0x18f0 security/selinux/ss/services.c:1724 security_transition_sid+0x75/0x90 security/selinux/ss/services.c:1763 socket_sockcreate_sid security/selinux/hooks.c:4335 [inline] selinux_socket_create+0x3cf/0x740 security/selinux/hooks.c:4368 security_socket_create+0x83/0xc0 security/security.c:1338 __sock_create+0xf7/0x850 net/socket.c:1212 sock_create net/socket.c:1297 [inline] SYSC_socket net/socket.c:1327 [inline] SyS_socket+0xeb/0x1d0 net/socket.c:1307 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007fb9d2eccc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fb9d2eccaa0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 000000000000001e RBP: 00007fb9d2ecca90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007fb9d2eccbc8 R14: 00000000004b767a R15: 0000000000000000 Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 4905 Comm: syz-executor0 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node+0x56/0x760 mm/slab.c:3632 __alloc_skb+0xf1/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:983 [inline] pfkey_sendmsg+0x20f/0xa00 net/key/af_key.c:3635 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007ff486287c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff486287aa0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 0000000020f56000 RDI: 0000000000000013 RBP: 00007ff486287a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007ff486287bc8 R14: 00000000004b767a R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 4932 Comm: syz-executor0 Tainted: G W 4.15.0-rc5+ #177 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3289 [inline] kmem_cache_alloc_node_trace+0x5a/0x750 mm/slab.c:3651 __do_kmalloc_node mm/slab.c:3671 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3686 __kmalloc_reserve.isra.39+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:983 [inline] pfkey_sendmsg+0x20f/0xa00 net/key/af_key.c:3635 sock_sendmsg_nosec net/socket.c:628 [inline] sock_sendmsg+0xca/0x110 net/socket.c:638 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2018 __sys_sendmsg+0xe5/0x210 net/socket.c:2052 SYSC_sendmsg net/socket.c:2063 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2059 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007ff486287c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff486287aa0 RCX: 0000000000452ac9 RDX: 0000000000000000 RSI: 0000000020f56000 RDI: 0000000000000013 RBP: 00007ff486287a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b767a R13: 00007ff486287bc8 R14: 00000000004b767a R15: 0000000000000000