device gre0 entered promiscuous mode
==================================================================
BUG: KASAN: slab-out-of-bounds in cap_convert_nscap+0x501/0x610 security/commoncap.c:498
Read of size 4 at addr ffff8801d98ec580 by task syz-executor5/7430

CPU: 0 PID: 7430 Comm: syz-executor5 Not tainted 4.15.0-rc4-mm1+ #49
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+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:355 [inline]
 kasan_report+0x23b/0x360 mm/kasan/report.c:413
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:433
 cap_convert_nscap+0x501/0x610 security/commoncap.c:498
 setxattr+0x365/0x400 fs/xattr.c:446
 SYSC_fsetxattr fs/xattr.c:508 [inline]
 SyS_fsetxattr+0x130/0x190 fs/xattr.c:497
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452ac9
RSP: 002b:00007f2d8ad86c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 00000000209aafff RSI: 0000000020612000 RDI: 0000000000000013
RBP: 000000000000034b R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000212 R12: 00000000006f2fa8
R13: 00000000ffffffff R14: 00007f2d8ad876d4 R15: 0000000000000000

Allocated by task 7430:
 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
 __do_kmalloc_node mm/slab.c:3669 [inline]
 __kmalloc_node+0x47/0x70 mm/slab.c:3676
 kmalloc_node include/linux/slab.h:558 [inline]
 kvmalloc_node+0x99/0xd0 mm/util.c:397
 kvmalloc include/linux/mm.h:541 [inline]
 setxattr+0x152/0x400 fs/xattr.c:435
 SYSC_fsetxattr fs/xattr.c:508 [inline]
 SyS_fsetxattr+0x130/0x190 fs/xattr.c:497
 entry_SYSCALL_64_fastpath+0x1f/0x96

Freed by task 4859:
 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:3485 [inline]
 kfree+0xd6/0x260 mm/slab.c:3800
 single_release+0x88/0xb0 fs/seq_file.c:603
 __fput+0x327/0x7e0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x199/0x270 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:165
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x94/0x96

The buggy address belongs to the object at ffff8801d98ec580
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 32-byte region [ffff8801d98ec580, ffff8801d98ec5a0)
The buggy address belongs to the page:
page:ffffea0007663b00 count:1 mapcount:0 mapping:ffff8801d98ec000 index:0xffff8801d98ecfc1
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801d98ec000 ffff8801d98ecfc1 0000000100000030
raw: ffffea0007400fe0 ffffea0007663420 ffff8801dac001c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d98ec480: fb fb fb fb fc fc fc fc 05 fc fc fc fc fc fc fc
 ffff8801d98ec500: fb fb fb fb fc fc fc fc 05 fc fc fc fc fc fc fc
>ffff8801d98ec580: 01 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc
                   ^
 ffff8801d98ec600: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff8801d98ec680: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
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