audit: type=1804 audit(1612954968.447:58): pid=12893 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir933216056/syzkaller.AxvyrS/112/bus" dev="sda1" ino=16125 res=1 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. IPVS: ftp: loaded support on port[0] = 21 ================================================================== BUG: KASAN: use-after-free in list_replace syzkaller/managers/linux-4-14/kernel/./include/linux/list.h:141 [inline] BUG: KASAN: use-after-free in list_replace_init syzkaller/managers/linux-4-14/kernel/./include/linux/list.h:149 [inline] BUG: KASAN: use-after-free in padata_parallel_worker+0x2b0/0x2e0 syzkaller/managers/linux-4-14/kernel/kernel/padata.c:76 Write of size 8 at addr ffff8880ac102118 by task kworker/0:3/9069 CPU: 0 PID: 9069 Comm: kworker/0:3 Not tainted 4.14.218-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: pencrypt padata_parallel_worker Call Trace: __dump_stack syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:351 kasan_report syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:409 [inline] __asan_report_store8_noabort+0x68/0x70 syzkaller/managers/linux-4-14/kernel/mm/kasan/report.c:435 list_replace syzkaller/managers/linux-4-14/kernel/./include/linux/list.h:141 [inline] list_replace_init syzkaller/managers/linux-4-14/kernel/./include/linux/list.h:149 [inline] padata_parallel_worker+0x2b0/0x2e0 syzkaller/managers/linux-4-14/kernel/kernel/padata.c:76 process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 Allocated by task 12892: save_stack syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:447 [inline] set_track syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:551 __do_kmalloc syzkaller/managers/linux-4-14/kernel/mm/slab.c:3720 [inline] __kmalloc+0x15a/0x400 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3729 kmalloc syzkaller/managers/linux-4-14/kernel/./include/linux/slab.h:493 [inline] kzalloc syzkaller/managers/linux-4-14/kernel/./include/linux/slab.h:661 [inline] tls_push_record+0xfa/0x1270 syzkaller/managers/linux-4-14/kernel/net/tls/tls_sw.c:250 tls_sw_sendpage+0x760/0xb50 syzkaller/managers/linux-4-14/kernel/net/tls/tls_sw.c:617 inet_sendpage+0x155/0x590 syzkaller/managers/linux-4-14/kernel/net/ipv4/af_inet.c:779 kernel_sendpage syzkaller/managers/linux-4-14/kernel/net/socket.c:3407 [inline] sock_sendpage+0xdf/0x140 syzkaller/managers/linux-4-14/kernel/net/socket.c:871 pipe_to_sendpage+0x226/0x2d0 syzkaller/managers/linux-4-14/kernel/fs/splice.c:451 splice_from_pipe_feed syzkaller/managers/linux-4-14/kernel/fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 syzkaller/managers/linux-4-14/kernel/fs/splice.c:626 splice_from_pipe syzkaller/managers/linux-4-14/kernel/fs/splice.c:661 [inline] generic_splice_sendpage+0xc1/0x110 syzkaller/managers/linux-4-14/kernel/fs/splice.c:832 do_splice_from syzkaller/managers/linux-4-14/kernel/fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 syzkaller/managers/linux-4-14/kernel/fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 syzkaller/managers/linux-4-14/kernel/fs/splice.c:973 do_splice_direct+0x164/0x210 syzkaller/managers/linux-4-14/kernel/fs/splice.c:1061 do_sendfile+0x47f/0xb30 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1441 SYSC_sendfile64 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 12892: save_stack syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:447 [inline] set_track syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:524 __cache_free syzkaller/managers/linux-4-14/kernel/mm/slab.c:3496 [inline] kfree+0xc9/0x250 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3815 tls_push_record+0xc3b/0x1270 syzkaller/managers/linux-4-14/kernel/net/tls/tls_sw.c:293 tls_sw_sendpage+0x760/0xb50 syzkaller/managers/linux-4-14/kernel/net/tls/tls_sw.c:617 inet_sendpage+0x155/0x590 syzkaller/managers/linux-4-14/kernel/net/ipv4/af_inet.c:779 kernel_sendpage syzkaller/managers/linux-4-14/kernel/net/socket.c:3407 [inline] sock_sendpage+0xdf/0x140 syzkaller/managers/linux-4-14/kernel/net/socket.c:871 pipe_to_sendpage+0x226/0x2d0 syzkaller/managers/linux-4-14/kernel/fs/splice.c:451 splice_from_pipe_feed syzkaller/managers/linux-4-14/kernel/fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 syzkaller/managers/linux-4-14/kernel/fs/splice.c:626 splice_from_pipe syzkaller/managers/linux-4-14/kernel/fs/splice.c:661 [inline] generic_splice_sendpage+0xc1/0x110 syzkaller/managers/linux-4-14/kernel/fs/splice.c:832 audit: type=1804 audit(1612954968.447:59): pid=12892 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir043014079/syzkaller.JoVsl3/142/bus" dev="sda1" ino=16128 res=1 do_splice_from syzkaller/managers/linux-4-14/kernel/fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 syzkaller/managers/linux-4-14/kernel/fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 syzkaller/managers/linux-4-14/kernel/fs/splice.c:973 do_splice_direct+0x164/0x210 syzkaller/managers/linux-4-14/kernel/fs/splice.c:1061 do_sendfile+0x47f/0xb30 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1441 SYSC_sendfile64 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff8880ac1020c0 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 88 bytes inside of 256-byte region [ffff8880ac1020c0, ffff8880ac1021c0) The buggy address belongs to the page: page:ffffea0002b04080 count:1 mapcount:0 mapping:ffff8880ac1020c0 index:0xffff8880ac1025c0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880ac1020c0 ffff8880ac1025c0 000000010000000b raw: ffffea0002a678a0 ffffea0002b6f5a0 ffff88813fe807c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880ac102000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880ac102080: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb >ffff8880ac102100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880ac102180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880ac102200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================