netlink: 'syz-executor0': attribute type 1 has an invalid length. ecryptfs_parse_options: You must supply at least one valid auth tok signature as a mount parameter; see the eCryptfs README ================================================================== BUG: KASAN: use-after-free in atomic_dec_and_test include/asm-generic/atomic-instrumented.h:259 [inline] BUG: KASAN: use-after-free in put_task_struct include/linux/sched/task.h:95 [inline] BUG: KASAN: use-after-free in _free_event+0x49a/0x1660 kernel/events/core.c:4452 Write of size 4 at addr ffff8801c8442060 by task syz-executor1/18134 CPU: 0 PID: 18134 Comm: syz-executor1 Not tainted 4.19.0-rc7-next-20181015+ #94 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 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267 kasan_check_write+0x14/0x20 mm/kasan/kasan.c:278 Error parsing options; rc = [-22] atomic_dec_and_test include/asm-generic/atomic-instrumented.h:259 [inline] put_task_struct include/linux/sched/task.h:95 [inline] _free_event+0x49a/0x1660 kernel/events/core.c:4452 free_event+0xb4/0x180 kernel/events/core.c:4473 perf_event_release_kernel+0x7d4/0x10e0 kernel/events/core.c:4634 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x3bc/0xa70 fs/file_table.c:279 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 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 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:00007f30c91e0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffe7 RBX: 0000000000000003 RCX: 0000000000457569 RDX: 00000000200001c0 RSI: 00000000c028660f RDI: 0000000000000008 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f30c91e16d4 R13: 00000000004bf5c9 R14: 00000000004cf460 R15: 00000000ffffffff Allocated by task 18144: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc_node+0x144/0x730 mm/slab.c:3644 alloc_task_struct_node kernel/fork.c:158 [inline] dup_task_struct kernel/fork.c:843 [inline] copy_process+0x1ff3/0x8770 kernel/fork.c:1751 _do_fork+0x1cb/0x11c0 kernel/fork.c:2216 __do_sys_clone kernel/fork.c:2323 [inline] __se_sys_clone kernel/fork.c:2317 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2317 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 18144: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x83/0x290 mm/slab.c:3760 free_task_struct kernel/fork.c:163 [inline] free_task+0x16e/0x1f0 kernel/fork.c:457 copy_process+0x1d99/0x8770 kernel/fork.c:2148 _do_fork+0x1cb/0x11c0 kernel/fork.c:2216 __do_sys_clone kernel/fork.c:2323 [inline] __se_sys_clone kernel/fork.c:2317 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2317 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801c8442040 which belongs to the cache task_struct(33:syz1) of size 6080 The buggy address is located 32 bytes inside of 6080-byte region [ffff8801c8442040, ffff8801c8443800) The buggy address belongs to the page: page:ffffea0007211080 count:1 mapcount:0 mapping:ffff8801bd9de480 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000010200(slab|head) raw: 02fffc0000010200 ffffea0007390288 ffffea0006043c88 ffff8801bd9de480 raw: 0000000000000000 ffff8801c8442040 0000000100000001 ffff8801d59585c0 page dumped because: kasan: bad access detected page->mem_cgroup:ffff8801d59585c0 Memory state around the buggy address: ffff8801c8441f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801c8441f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801c8442000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8801c8442080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801c8442100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================