name failslab, interval 1, probability 0, space 0, times 0 netlink: 11 bytes leftover after parsing attributes in process `syz-executor.2'. TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. ================================================================== BUG: KASAN: use-after-free in list_replace include/linux/list.h:141 [inline] BUG: KASAN: use-after-free in list_replace_init include/linux/list.h:149 [inline] BUG: KASAN: use-after-free in padata_parallel_worker+0x313/0x3b0 kernel/padata.c:74 CPU: 1 PID: 23680 Comm: syz-executor.0 Not tainted 4.14.141 #37 Write of size 8 at addr ffff888065584318 by task kworker/0:1/21263 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+0x138/0x197 lib/dump_stack.c:53 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 mm/slab.c:3376 [inline] kmem_cache_alloc+0x47/0x780 mm/slab.c:3550 anon_vma_chain_alloc mm/rmap.c:129 [inline] anon_vma_clone+0xde/0x470 mm/rmap.c:269 anon_vma_fork+0x87/0x4d0 mm/rmap.c:332 dup_mmap kernel/fork.c:669 [inline] dup_mm kernel/fork.c:1208 [inline] copy_mm kernel/fork.c:1263 [inline] copy_process.part.0+0x45e2/0x6a00 kernel/fork.c:1780 copy_process kernel/fork.c:1595 [inline] _do_fork+0x19e/0xce0 kernel/fork.c:2085 SYSC_clone kernel/fork.c:2195 [inline] SyS_clone+0x37/0x50 kernel/fork.c:2189 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459879 RSP: 002b:00007f761c25bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f761c25bc90 RCX: 0000000000459879 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f761c25c6d4 R13: 00000000004bfd46 R14: 00000000004d1af8 R15: 0000000000000004 CPU: 0 PID: 21263 Comm: kworker/0:1 Not tainted 4.14.141 #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: pencrypt padata_parallel_worker Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 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_store8_noabort+0x17/0x20 mm/kasan/report.c:435 list_replace include/linux/list.h:141 [inline] list_replace_init include/linux/list.h:149 [inline] padata_parallel_worker+0x313/0x3b0 kernel/padata.c:74 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Allocated by task 23681: 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 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15d/0x7a0 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:661 [inline] tls_push_record+0x10a/0x1210 net/tls/tls_sw.c:250 tls_sw_sendmsg+0x9e8/0x1020 net/tls/tls_sw.c:457 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 SYSC_sendto+0x206/0x310 net/socket.c:1763 SyS_sendto+0x40/0x50 net/socket.c:1731 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 23681: 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 tls_push_record+0xc03/0x1210 net/tls/tls_sw.c:293 tls_sw_sendmsg+0x9e8/0x1020 net/tls/tls_sw.c:457 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 SYSC_sendto+0x206/0x310 net/socket.c:1763 SyS_sendto+0x40/0x50 net/socket.c:1731 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 The buggy address belongs to the object at ffff8880655842c0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 88 bytes inside of 512-byte region [ffff8880655842c0, ffff8880655844c0) The buggy address belongs to the page: page:ffffea0001956100 count:1 mapcount:0 mapping:ffff888065584040 index:0xffff888065584a40 flags: 0x1fffc0000000100(slab) raw: 01fffc0000000100 ffff888065584040 ffff888065584a40 0000000100000004 raw: ffffea000223e360 ffffea00024f75a0 ffff8880aa800940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888065584200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888065584280: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb >ffff888065584300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888065584380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888065584400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================