slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x270/0x740 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3683 [inline] __kmalloc_node_track_caller+0x3c/0x70 mm/slab.c:3698 kasan: GPF could be caused by NULL-ptr deref or user memory access __kmalloc_reserve.isra.38+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x150/0x770 net/core/skbuff.c:205 general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8583 Comm: syz-executor4 Not tainted 4.20.0-rc1-next-20181107+ #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:locks_remove_flock+0x216/0x350 fs/locks.c:2567 Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40 RSP: 0018:ffff880180a87880 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb RBP: ffff880180a87a60 R08: ffff8801c1952380 R09: ffffed003b5c5b67 alloc_skb include/linux/skbuff.h:997 [inline] pfkey_sendmsg+0x263/0xfb0 net/key/af_key.c:3670 R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801bffcdd40 R13: ffff880180a878f8 R14: 1ffff10030150f13 R15: dffffc0000000000 FS: 0000000001685940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000707158 CR3: 00000001c7a97000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:632 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2117 Call Trace: locks_remove_file+0x148/0x5c0 fs/locks.c:2607 __sys_sendmsg+0x11d/0x280 net/socket.c:2155 __fput+0x2f0/0xa70 fs/file_table.c:271 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f15fe696c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f15fe696c90 RCX: 0000000000457569 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 RDX: 0000000000000000 RSI: 00000000205f5000 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f15fe6976d4 R13: 00000000004c3aa0 R14: 00000000004d5b60 R15: 0000000000000004 kobject: 'loop0' (00000000e0a950b8): kobject_uevent_env kobject: 'loop0' (00000000e0a950b8): fill_kobj_path: path = '/devices/virtual/block/loop0' entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'loop5' (0000000086d063c4): kobject_uevent_env RIP: 0033:0x411021 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffe3818d9f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 kobject: 'loop5' (0000000086d063c4): fill_kobj_path: path = '/devices/virtual/block/loop5' RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411021 RDX: 0000000000000000 RSI: 0000000000730540 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffe3818d910 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000046 R15: 0000000000000004 Modules linked in: kobject: 'loop5' (0000000086d063c4): kobject_uevent_env ---[ end trace 64500a35e06532a0 ]--- kobject: 'gre0' (000000003d559ed5): kobject_cleanup, parent (null) kobject: 'gre0' (000000003d559ed5): auto cleanup 'remove' event kobject: 'gre0' (000000003d559ed5): kobject_uevent_env kobject: 'gre0' (000000003d559ed5): kobject_uevent_env: uevent_suppress caused the event to drop! RIP: 0010:locks_remove_flock+0x216/0x350 fs/locks.c:2567 kobject: 'gre0' (000000003d559ed5): calling ktype release kobject: 'loop1' (00000000aa85230d): kobject_uevent_env kobject: 'loop5' (0000000086d063c4): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000aa85230d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'gre0': free name Code: 00 0f 85 3a 01 00 00 48 8b 5b 98 48 85 db 74 3a e8 1f 41 92 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 17 01 00 00 48 8b 5b 08 48 85 db 74 0d e8 f2 40 kobject: 'loop1' (00000000aa85230d): kobject_uevent_env FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 FAT-fs (loop1): bogus number of reserved sectors kobject: 'gre0' (0000000071c5290a): kobject_cleanup, parent (null) FAT-fs (loop1): Can't find a valid FAT filesystem kobject: 'gre0' (0000000071c5290a): auto cleanup 'remove' event RSP: 0018:ffff880180a87880 EFLAGS: 00010202 kobject: 'loop1' (00000000aa85230d): fill_kobj_path: path = '/devices/virtual/block/loop1' IPVS: ftp: loaded support on port[0] = 21 kobject: 'gre0' (0000000071c5290a): kobject_uevent_env RAX: dffffc0000000000 RBX: 0000000041b58ab3 RCX: ffffffff81ed555d kobject: 'gre0' (0000000071c5290a): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop0' (00000000e0a950b8): kobject_uevent_env RDX: 000000000836b157 RSI: ffffffff81ed5c71 RDI: 0000000041b58abb kobject: 'loop0' (00000000e0a950b8): fill_kobj_path: path = '/devices/virtual/block/loop0' CPU: 0 PID: 8611 Comm: syz-executor2 Tainted: G D 4.20.0-rc1-next-20181107+ #107 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x2be/0x730 mm/slab.c:3552 skb_clone+0x1bb/0x500 net/core/skbuff.c:1280 pfkey_process+0xc1/0x9a0 net/key/af_key.c:2836 pfkey_sendmsg+0x5e5/0xfb0 net/key/af_key.c:3683 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:632 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2117 __sys_sendmsg+0x11d/0x280 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f15fe696c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f15fe696c90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 00000000205f5000 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f15fe6976d4 R13: 00000000004c3aa0 R14: 00000000004d5b60 R15: 0000000000000004 RBP: ffff880180a87a60 R08: ffff8801c1952380 R09: ffffed003b5c5b67 kobject: 'gre0' (0000000071c5290a): calling ktype release kobject: 'gre0': free name kobject: 'rx-0' (00000000bf26940f): kobject_cleanup, parent 00000000b8feeccf R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801bffcdd40 kobject: 'rx-0' (00000000bf26940f): auto cleanup 'remove' event kobject: 'loop2' (000000008ff8aa5f): kobject_uevent_env kobject: 'rx-0' (00000000bf26940f): kobject_uevent_env kobject: 'loop2' (000000008ff8aa5f): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'rx-0' (00000000bf26940f): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop3' (0000000041a55b88): kobject_uevent_env kobject: 'loop1' (00000000aa85230d): kobject_uevent_env R13: ffff880180a878f8 R14: 1ffff10030150f13 R15: dffffc0000000000 kobject: 'loop1' (00000000aa85230d): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000041a55b88): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'rx-0' (00000000bf26940f): auto cleanup kobject_del FS: 0000000001685940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'rx-0' (00000000bf26940f): calling ktype release CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'rx-0': free name kobject: 'loop3' (0000000041a55b88): kobject_uevent_env CR2: 0000001b2f221000 CR3: 00000001c7a97000 CR4: 00000000001426e0 kobject: 'tx-0' (0000000033d0980c): kobject_cleanup, parent 00000000b8feeccf DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop3' (0000000041a55b88): fill_kobj_path: path = '/devices/virtual/block/loop3' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'tx-0' (0000000033d0980c): auto cleanup 'remove' event