====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc9+ #283 Not tainted ------------------------------------------------------ syz-executor4/5202 is trying to acquire lock: (&xt[i].mutex){+.+.}, at: [<000000009681afcb>] xt_find_target+0x44/0x1e0 net/netfilter/x_tables.c:229 but task is already holding lock: (sk_lock-AF_INET6){+.+.}, at: [<00000000319e94f5>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET6){+.+.}, at: [<00000000319e94f5>] ipv6_setsockopt+0xff/0x150 net/ipv6/ipv6_sockglue.c:927 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sk_lock-AF_INET6){+.+.}: lock_sock_nested+0xc2/0x110 net/core/sock.c:2770 lock_sock include/net/sock.h:1461 [inline] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1452 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #1 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 unregister_netdevice_notifier+0x91/0x4e0 net/core/dev.c:1656 clusterip_config_entry_put net/ipv4/netfilter/ipt_CLUSTERIP.c:114 [inline] clusterip_tg_destroy+0x389/0x6e0 net/ipv4/netfilter/ipt_CLUSTERIP.c:508 cleanup_entry+0x218/0x350 net/ipv4/netfilter/ip_tables.c:659 __do_replace+0x7d7/0xa90 net/ipv4/netfilter/ip_tables.c:1096 do_replace net/ipv4/netfilter/ip_tables.c:1152 [inline] do_ipt_set_ctl+0x40f/0x5f0 net/ipv4/netfilter/ip_tables.c:1682 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1256 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2875 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (&xt[i].mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 xt_find_target+0x44/0x1e0 net/netfilter/x_tables.c:229 xt_request_find_target+0x2c/0xb0 net/netfilter/x_tables.c:255 find_check_entry.isra.7+0x669/0xcf0 net/ipv6/netfilter/ip6_tables.c:572 translate_table+0xf52/0x1690 net/ipv6/netfilter/ip6_tables.c:749 do_replace net/ipv6/netfilter/ip6_tables.c:1167 [inline] do_ip6t_set_ctl+0x370/0x5f0 net/ipv6/netfilter/ip6_tables.c:1693 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x115/0x150 net/ipv6/ipv6_sockglue.c:928 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1452 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Chain exists of: &xt[i].mutex --> rtnl_mutex --> sk_lock-AF_INET6 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET6); lock(rtnl_mutex); lock(sk_lock-AF_INET6); lock(&xt[i].mutex); *** DEADLOCK *** 1 lock held by syz-executor4/5202: #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000319e94f5>] lock_sock include/net/sock.h:1461 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000319e94f5>] ipv6_setsockopt+0xff/0x150 net/ipv6/ipv6_sockglue.c:927 stack backtrace: CPU: 0 PID: 5202 Comm: syz-executor4 Not tainted 4.15.0-rc9+ #283 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_circular_bug.isra.37+0x2cd/0x2dc kernel/locking/lockdep.c:1218 check_prev_add kernel/locking/lockdep.c:1858 [inline] check_prevs_add kernel/locking/lockdep.c:1971 [inline] validate_chain kernel/locking/lockdep.c:2412 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3426 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 xt_find_target+0x44/0x1e0 net/netfilter/x_tables.c:229 xt_request_find_target+0x2c/0xb0 net/netfilter/x_tables.c:255 find_check_entry.isra.7+0x669/0xcf0 net/ipv6/netfilter/ip6_tables.c:572 translate_table+0xf52/0x1690 net/ipv6/netfilter/ip6_tables.c:749 do_replace net/ipv6/netfilter/ip6_tables.c:1167 [inline] do_ip6t_set_ctl+0x370/0x5f0 net/ipv6/netfilter/ip6_tables.c:1693 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x115/0x150 net/ipv6/ipv6_sockglue.c:928 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1452 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa83a2f5c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fa83a2f6700 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000013 RBP: 0000000000000000 R08: 00000000000003b8 R09: 0000000000000000 R10: 0000000020019c48 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a2f33f R14: 00007fa83a2f69c0 R15: 0000000000000000 xt_AUDIT: Audit type out of range (valid range: 0..2) x_tables: ip_tables: REJECT.0 target: invalid size 8 (kernel) != (user) 6 x_tables: ip_tables: REJECT.0 target: invalid size 8 (kernel) != (user) 6 x_tables: ip_tables: REJECT.0 target: invalid size 8 (kernel) != (user) 6 xt_HMARK: hash modulus can't be zero Cannot find add_set index 0 as target Cannot find add_set index 0 as target xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero Cannot find add_set index 0 as target xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero xt_cgroup: invalid path, errno=-2 audit: type=1400 audit(1517070056.309:30): avc: denied { map } for pid=5516 comm="syz-executor1" path="socket:[13815]" dev="sockfs" ino=13815 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=socket permissive=1 xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 x_tables: ip_tables: TCPMSS target: only valid for protocol 6 x_tables: ip_tables: TCPMSS target: only valid for protocol 6 x_tables: ip_tables: TCPMSS target: only valid for protocol 6 xt_hashlimit: overflow, try lower: 0/0 xt_hashlimit: overflow, try lower: 0/0 xt_hashlimit: overflow, try lower: 0/0 TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. xt_cgroup: no path or classid specified xt_cgroup: no path or classid specified xt_cgroup: no path or classid specified dccp_invalid_packet: pskb_may_pull failed FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 7230 Comm: syz-executor1 Not tainted 4.15.0-rc9+ #283 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_track_caller+0x5f/0x760 mm/slab.c:3723 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3043 [inline] SyS_mount+0x3c/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007ff112fe0c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff112fe0aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007ff112fe0a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007ff112fe0bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7244 Comm: syz-executor1 Not tainted 4.15.0-rc9+ #283 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_track_caller+0x5f/0x760 mm/slab.c:3723 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3048 [inline] SyS_mount+0x6b/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007ff112fe0c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff112fe0aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007ff112fe0a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007ff112fe0bc8 R14: 00000000004b8096 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: 7265 Comm: syz-executor5 Not tainted 4.15.0-rc9+ #283 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+0x33/0x70 mm/slab.c:3679 kmalloc_node include/linux/slab.h:541 [inline] kvmalloc_node+0x64/0xd0 mm/util.c:397 kvmalloc include/linux/mm.h:541 [inline] kvzalloc include/linux/mm.h:549 [inline] alloc_netdev_mqs+0x16d/0xed0 net/core/dev.c:8134 tun_set_iff drivers/net/tun.c:2274 [inline] __tun_chr_ioctl+0x138b/0x3dd0 drivers/net/tun.c:2533 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:2782 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fcadf10cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcadf10caa0 RCX: 0000000000453299 RDX: 0000000020493000 RSI: 00000000400454ca RDI: 0000000000000013 RBP: 00007fcadf10ca90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fcadf10cbc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7274 Comm: syz-executor4 Not tainted 4.15.0-rc9+ #283 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_track_caller+0x5f/0x760 mm/slab.c:3723 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3043 [inline] SyS_mount+0x3c/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa83a2f5c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa83a2f5aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007fa83a2f5a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fa83a2f5bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7279 Comm: syz-executor3 Not tainted 4.15.0-rc9+ #283 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_track_caller+0x5f/0x760 mm/slab.c:3723 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3043 [inline] SyS_mount+0x3c/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f7d9b288c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7d9b288aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007f7d9b288a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f7d9b288bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7289 Comm: syz-executor5 Not tainted 4.15.0-rc9+ #283 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] __hw_addr_create_ex+0xaa/0x3c0 net/core/dev_addr_lists.c:34 __hw_addr_add_ex+0xfc/0x270 net/core/dev_addr_lists.c:80 __hw_addr_add net/core/dev_addr_lists.c:88 [inline] dev_addr_init+0x167/0x260 net/core/dev_addr_lists.c:371 alloc_netdev_mqs+0x21a/0xed0 net/core/dev.c:8145 tun_set_iff drivers/net/tun.c:2274 [inline] __tun_chr_ioctl+0x138b/0x3dd0 drivers/net/tun.c:2533 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:2782 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fcadf10cc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcadf10caa0 RCX: 0000000000453299 RDX: 0000000020493000 RSI: 00000000400454ca RDI: 0000000000000013 RBP: 00007fcadf10ca90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fcadf10cbc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7287 Comm: syz-executor4 Not tainted 4.15.0-rc9+ #283 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_track_caller+0x5f/0x760 mm/slab.c:3723 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3048 [inline] SyS_mount+0x6b/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa83a2f5c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa83a2f5aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007fa83a2f5a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fa83a2f5bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7286 Comm: syz-executor6 Not tainted 4.15.0-rc9+ #283 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] l2tp_session_create+0x8e/0xc60 net/l2tp/l2tp_core.c:1749 pppol2tp_connect+0xed7/0x1dd0 net/l2tp/l2tp_ppp.c:748 SYSC_connect+0x213/0x4a0 net/socket.c:1621 SyS_connect+0x24/0x30 net/socket.c:1602 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fee38483c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007fee38483aa0 RCX: 0000000000453299 RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000015 RBP: 00007fee38483a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fee38483bc8 R14: 00000000004b8096 R15: 0000000000000000 CPU: 0 PID: 7268 Comm: syz-executor1 Not tainted 4.15.0-rc9+ #283 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] copy_mount_options+0x5f/0x2e0 fs/namespace.c:2721 SYSC_mount fs/namespace.c:3053 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007ff112fe0c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff112fe0aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007ff112fe0a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007ff112fe0bc8 R14: 00000000004b8096 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: 0 PID: 7297 Comm: syz-executor3 Not tainted 4.15.0-rc9+ #283 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_track_caller+0x5f/0x760 mm/slab.c:3723 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3048 [inline] SyS_mount+0x6b/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f7d9b288c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7d9b288aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007f7d9b288a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f7d9b288bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7303 Comm: syz-executor4 Not tainted 4.15.0-rc9+ #283 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] copy_mount_options+0x5f/0x2e0 fs/namespace.c:2721 SYSC_mount fs/namespace.c:3053 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa83a2f5c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa83a2f5aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007fa83a2f5a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fa83a2f5bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7314 Comm: syz-executor4 Not tainted 4.15.0-rc9+ #283 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 getname_flags+0xcb/0x580 fs/namei.c:138 user_path_at_empty+0x2d/0x50 fs/namei.c:2590 user_path include/linux/namei.h:62 [inline] do_mount+0x15f/0x2bb0 fs/namespace.c:2782 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa83a2f5c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa83a2f5aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007fa83a2f5a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fa83a2f5bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7311 Comm: syz-executor3 Not tainted 4.15.0-rc9+ #283 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] copy_mount_options+0x5f/0x2e0 fs/namespace.c:2721 SYSC_mount fs/namespace.c:3053 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f7d9b288c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7d9b288aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007f7d9b288a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f7d9b288bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7319 Comm: syz-executor4 Not tainted 4.15.0-rc9+ #283 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 getname_flags+0xcb/0x580 fs/namei.c:138 user_path_at_empty+0x2d/0x50 fs/namei.c:2590 user_path include/linux/namei.h:62 [inline] do_mount+0x15f/0x2bb0 fs/namespace.c:2782 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa83a2f5c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa83a2f5aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007fa83a2f5a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007fa83a2f5bc8 R14: 00000000004b8096 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 7322 Comm: syz-executor3 Not tainted 4.15.0-rc9+ #283 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_fail_alloc_page mm/page_alloc.c:2948 [inline] prepare_alloc_pages mm/page_alloc.c:4187 [inline] __alloc_pages_nodemask+0x338/0xd80 mm/page_alloc.c:4226 __alloc_pages include/linux/gfp.h:456 [inline] __alloc_pages_node include/linux/gfp.h:469 [inline] kmem_getpages mm/slab.c:1413 [inline] cache_grow_begin+0x72/0x3f0 mm/slab.c:2668 cache_alloc_refill mm/slab.c:3035 [inline] ____cache_alloc mm/slab.c:3117 [inline] __do_cache_alloc mm/slab.c:3339 [inline] slab_alloc mm/slab.c:3374 [inline] kmem_cache_alloc_trace+0x3f0/0x750 mm/slab.c:3608 kmalloc include/linux/slab.h:499 [inline] copy_mount_options+0x5f/0x2e0 fs/namespace.c:2721 SYSC_mount fs/namespace.c:3053 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3035 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f7d9b288c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7d9b288aa0 RCX: 0000000000453299 RDX: 0000000020018ffa RSI: 0000000020022000 RDI: 0000000020038ff8 RBP: 00007f7d9b288a90 R08: 0000000020038000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b8096 R13: 00007f7d9b288bc8 R14: 00000000004b8096 R15: 0000000000000000 CPU: 1 PID: 7299 Comm: syz-executor5 Not tainted 4.15.0-rc9+ #283 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+0x33/0x70 mm/slab.c:3679 kmalloc_node include/linux/slab.h:541 [inline] kvmalloc_node+0x64/0xd0 mm/util.c:397 kvmalloc include/linux/mm.h:541 [inline] kvzalloc include/linux/mm.h:549 [inline] netif_alloc_netdev_queues net/core/dev.c:7587 [inline] alloc_netdev_mqs+0x81b/0xed0 net/core/dev.c:8177