syz-executor.5 cpuset=/ mems_allowed=0-1
, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null)
page allocation failure: order:5, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null)
syz-executor.4 cpuset=/ mems_allowed=0-1
==================================================================
BUG: KASAN: double-free or invalid-free in ceph_destroy_options+0xb4/0xf0 net/ceph/ceph_common.c:288

CPU: 1 PID: 32021 Comm: syz-executor.5 Not tainted 4.14.175-syzkaller #0
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+0xf7/0x13b lib/dump_stack.c:58
 print_address_description.cold.7+0x9/0x1c9 mm/kasan/report.c:252
 kasan_report_double_free+0x55/0x80 mm/kasan/report.c:333
 kasan_slab_free+0xa3/0xc0 mm/kasan/kasan.c:514
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 ceph_destroy_options+0xb4/0xf0 net/ceph/ceph_common.c:288
 ceph_mount+0xa98/0x1563 fs/ceph/super.c:1018
 mount_fs+0x84/0x26e fs/super.c:1237
 vfs_kern_mount.part.33+0x58/0x3c0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x36b/0x26a0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xb8/0xd0 fs/namespace.c:3072
 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458da9
RSP: 002b:00007ff439d2cc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9
RDX: 0000000020000100 RSI: 0000000020000200 RDI: 0000000020000040
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff439d2d6d4
R13: 00000000004c4da1 R14: 00000000004d8a08 R15: 00000000ffffffff

Allocated by task 32021:
 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+0xc7/0xe0 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x152/0x7b0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kmalloc_array include/linux/slab.h:606 [inline]
 kcalloc include/linux/slab.h:618 [inline]
 ceph_parse_options+0x127/0xd30 net/ceph/ceph_common.c:352
 parse_mount_options fs/ceph/super.c:475 [inline]
 ceph_mount+0x390/0x1563 fs/ceph/super.c:1007
 mount_fs+0x84/0x26e fs/super.c:1237
 vfs_kern_mount.part.33+0x58/0x3c0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x36b/0x26a0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xb8/0xd0 fs/namespace.c:3072
 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 32021:
 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:3496 [inline]
 kfree+0xcc/0x270 mm/slab.c:3815
 ceph_destroy_options+0xb4/0xf0 net/ceph/ceph_common.c:288
 ceph_destroy_client+0x8f/0xb0 net/ceph/ceph_common.c:671
 create_fs_client fs/ceph/super.c:658 [inline]
 ceph_mount+0xb2c/0x1563 fs/ceph/super.c:1014
 mount_fs+0x84/0x26e fs/super.c:1237
 vfs_kern_mount.part.33+0x58/0x3c0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x36b/0x26a0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xb8/0xd0 fs/namespace.c:3072
 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff88808cc9c340
 which belongs to the cache kmalloc-8192 of size 8192
The buggy address is located 0 bytes inside of
 8192-byte region [ffff88808cc9c340, ffff88808cc9e340)
The buggy address belongs to the page:
page:ffffea0002332700 count:1 mapcount:0 mapping:ffff88808cc9c340 index:0x0 compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff88808cc9c340 0000000000000000 0000000100000001
raw: ffffea00022e6920 ffffea0002355a20 ffff8880aa802080 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808cc9c200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88808cc9c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808cc9c300: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                           ^
 ffff88808cc9c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808cc9c400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================