BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:276 [inline] BUG: KASAN: use-after-free in list_empty include/linux/list.h:202 [inline] BUG: KASAN: use-after-free in __queue_work+0x1029/0x1150 kernel/workqueue.c:1442 Read of size 8 at addr ffff8801d0ac0d00 by task syz-executor3/12844 CPU: 1 PID: 12844 Comm: syz-executor3 Not tainted 4.13.0-mm1+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x24e/0x340 mm/kasan/report.c:409 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430 __read_once_size include/linux/compiler.h:276 [inline] list_empty include/linux/list.h:202 [inline] __queue_work+0x1029/0x1150 kernel/workqueue.c:1442 queue_work_on+0x16a/0x1c0 kernel/workqueue.c:1486 queue_work include/linux/workqueue.h:489 [inline] strp_check_rcv+0x25/0x30 net/strparser/strparser.c:553 kcm_attach net/kcm/kcmsock.c:1439 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1460 [inline] kcm_ioctl+0x826/0x1610 net/kcm/kcmsock.c:1695 sock_do_ioctl+0x65/0xb0 net/socket.c:961 sock_ioctl+0x2c2/0x440 net/socket.c:1058 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007f03b7352c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000007180b0 RCX: 00000000004520a9 RDX: 00000000209b9000 RSI: 00000000000089e0 RDI: 000000000000000a RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b73ea R13: 00000000ffffffff R14: 0000000000000005 R15: 0000000020b4cfd0 Allocated by task 12844: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3561 kmem_cache_zalloc include/linux/slab.h:656 [inline] kcm_attach net/kcm/kcmsock.c:1394 [inline] kcm_attach_ioctl net/kcm/kcmsock.c:1460 [inline] kcm_ioctl+0x2d1/0x1610 net/kcm/kcmsock.c:1695 sock_do_ioctl+0x65/0xb0 net/socket.c:961 sock_ioctl+0x2c2/0x440 net/socket.c:1058 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe Freed by task 12852: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x77/0x280 mm/slab.c:3763 kcm_unattach+0xe50/0x1510 net/kcm/kcmsock.c:1563 kcm_unattach_ioctl net/kcm/kcmsock.c:1608 [inline] kcm_ioctl+0xdf0/0x1610 net/kcm/kcmsock.c:1705 sock_do_ioctl+0x65/0xb0 net/socket.c:961 sock_ioctl+0x2c2/0x440 net/socket.c:1058 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe The buggy address belongs to the object at ffff8801d0ac0bc0 which belongs to the cache kcm_psock_cache of size 664 The buggy address is located 320 bytes inside of 664-byte region [ffff8801d0ac0bc0, ffff8801d0ac0e58) The buggy address belongs to the page: page:ffffea000742b000 count:1 mapcount:0 mapping:ffff8801d0ac0200 index:0x0 compound_mapcount: 0 flags: 0x200000000008100(slab|head) raw: 0200000000008100 ffff8801d0ac0200 0000000000000000 0000000100000009 raw: ffffea000743da20 ffffea0007420620 ffff8801d2e2f680 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d0ac0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801d0ac0c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801d0ac0d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801d0ac0d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801d0ac0e00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc ==================================================================