fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10f/0x159 lib/fault-inject.c:149 should_failslab+0xdb/0x130 mm/failslab.c:32 ================================================================== slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3297 [inline] kmem_cache_alloc_node_trace+0x280/0x770 mm/slab.c:3659 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x3d/0x80 mm/slab.c:3696 BUG: KASAN: use-after-free in ccid2_hc_tx_packet_recv+0x1cf3/0x1fa4 net/dccp/ccids/ccid2.c:599 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137 Read of size 1 at addr ffff88805fcb8794 by task syz-executor.0/24902 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] alloc_skb_with_frags+0x86/0x4b0 net/core/skbuff.c:5228 sock_alloc_send_pskb+0x5db/0x740 net/core/sock.c:2078 sock_alloc_send_skb+0x32/0x40 net/core/sock.c:2095 dccp_sendmsg+0x214/0x950 net/dccp/proto.c:785 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x349/0x840 net/socket.c:2062 __sys_sendmmsg+0x152/0x3a0 net/socket.c:2152 SYSC_sendmmsg net/socket.c:2183 [inline] SyS_sendmmsg+0x35/0x60 net/socket.c:2178 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a6f9 RSP: 002b:00007ffa92f0ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007ffa92f0ec90 RCX: 000000000045a6f9 RDX: 04000000000001e6 RSI: 0000000020000c00 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffa92f0f6d4 R13: 00000000004c8fc2 R14: 00000000004e0b50 R15: 0000000000000006 CPU: 1 PID: 24902 Comm: syz-executor.0 Not tainted 4.14.158-syzkaller #0 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+0x142/0x197 lib/dump_stack.c:58 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:427 ccid2_hc_tx_packet_recv+0x1cf3/0x1fa4 net/dccp/ccids/ccid2.c:599 ccid_hc_tx_packet_recv net/dccp/ccid.h:192 [inline] dccp_deliver_input_to_ccids+0x1d5/0x250 net/dccp/input.c:186 dccp_rcv_established net/dccp/input.c:378 [inline] dccp_rcv_established+0x6b/0xb0 net/dccp/input.c:368 dccp_v4_do_rcv+0x122/0x170 net/dccp/ipv4.c:656 sk_backlog_rcv include/net/sock.h:912 [inline] __release_sock+0x12d/0x350 net/core/sock.c:2264 release_sock+0x59/0x1b0 net/core/sock.c:2779 dccp_sendmsg+0x57e/0x950 net/dccp/proto.c:813 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x349/0x840 net/socket.c:2062 __sys_sendmmsg+0x152/0x3a0 net/socket.c:2152 SYSC_sendmmsg net/socket.c:2183 [inline] SyS_sendmmsg+0x35/0x60 net/socket.c:2178 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a6f9 RSP: 002b:00007f72258aac78 EFLAGS: 00000246 kobject: 'queues' (ffff888060250748): kobject_uevent_env ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f72258aac90 RCX: 000000000045a6f9 RDX: 04000000000001e6 RSI: 0000000020000c00 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f72258ab6d4 R13: 00000000004c8fc2 R14: 00000000004e0b50 R15: 0000000000000006 Allocated by task 24902: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 kobject: 'queues' (ffff888060250748): kobject_uevent_env: filter function caused the event to drop! __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x51/0x80 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] dccp_send_ack+0xc7/0x330 net/dccp/output.c:580 ccid2_hc_rx_packet_recv+0x10e/0x180 net/dccp/ccids/ccid2.c:778 ccid_hc_rx_packet_recv net/dccp/ccid.h:185 [inline] dccp_deliver_input_to_ccids+0xdd/0x250 net/dccp/input.c:180 dccp_rcv_established net/dccp/input.c:378 [inline] dccp_rcv_established+0x6b/0xb0 net/dccp/input.c:368 dccp_v4_do_rcv+0x122/0x170 net/dccp/ipv4.c:656 sk_backlog_rcv include/net/sock.h:912 [inline] __sk_receive_skb+0x226/0x950 net/core/sock.c:511 kobject: 'rx-0' (ffff888055efa5d0): kobject_add_internal: parent: 'queues', set: 'queues' dccp_v4_rcv+0xd55/0x1910 net/dccp/ipv4.c:877 ip_local_deliver_finish+0x25e/0xad0 net/ipv4/ip_input.c:216 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] ip_local_deliver+0x1c3/0x4a0 net/ipv4/ip_input.c:257 dst_input include/net/dst.h:468 [inline] ip_rcv_finish+0x7be/0x1a50 net/ipv4/ip_input.c:396 NF_HOOK include/linux/netfilter.h:250 [inline] NF_HOOK include/linux/netfilter.h:244 [inline] ip_rcv+0xaa5/0x112b net/ipv4/ip_input.c:493 __netif_receive_skb_core+0x1ebe/0x2cb0 net/core/dev.c:4477 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4515 process_backlog+0x21f/0x730 net/core/dev.c:5197 napi_poll net/core/dev.c:5598 [inline] net_rx_action+0x490/0xf80 net/core/dev.c:5664 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 kobject: 'rx-0' (ffff888055efa5d0): kobject_uevent_env Freed by task 24902: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 skb_free_head+0x8b/0xb0 net/core/skbuff.c:554 skb_release_data+0x543/0x7c0 net/core/skbuff.c:574 skb_release_all+0x4d/0x60 net/core/skbuff.c:631 __kfree_skb net/core/skbuff.c:645 [inline] kfree_skb+0xb5/0x350 net/core/skbuff.c:663 dccp_v4_do_rcv net/dccp/ipv4.c:691 [inline] dccp_v4_do_rcv+0x13e/0x170 net/dccp/ipv4.c:651 kobject: 'rx-0' (ffff888055efa5d0): fill_kobj_path: path = '/devices/virtual/net/bond43/queues/rx-0' sk_backlog_rcv include/net/sock.h:912 [inline] __release_sock+0x12d/0x350 net/core/sock.c:2264 release_sock+0x59/0x1b0 net/core/sock.c:2779 dccp_sendmsg+0x57e/0x950 net/dccp/proto.c:813 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x349/0x840 net/socket.c:2062 __sys_sendmmsg+0x152/0x3a0 net/socket.c:2152 SYSC_sendmmsg net/socket.c:2183 [inline] SyS_sendmmsg+0x35/0x60 net/socket.c:2178 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 kobject: 'rx-1' (ffff888055efa650): kobject_add_internal: parent: 'queues', set: 'queues' The buggy address belongs to the object at ffff88805fcb8300 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 1172 bytes inside of 2048-byte region [ffff88805fcb8300, ffff88805fcb8b00) The buggy address belongs to the page: page:ffffea00017f2e00 count:1 mapcount:0 mapping:ffff88805fcb8300 index:0x0 compound_mapcount: 0 flags: 0xfffe0000008100(slab|head) raw: 00fffe0000008100 ffff88805fcb8300 0000000000000000 0000000100000003 raw: ffffea000264e120 ffff8880aa801948 ffff8880aa800c40 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88805fcb8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb kobject: 'rx-1' (ffff888055efa650): kobject_uevent_env ffff88805fcb8700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805fcb8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805fcb8800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805fcb8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================