Slab 0xffffea0001744c00 objects=26 used=12 fp=0xffff88805d133a20 flags=0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff)
Disabling lock debugging due to kernel taint
------------[ cut here ]------------
1
WARNING: mm/slub.c:1268 at __slab_err+0x15/0x20 mm/slub.c:1268, CPU#0: syz.3.493/7889
Modules linked in:
CPU: 0 UID: 0 PID: 7889 Comm: syz.3.493 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__slab_err+0x15/0x20 mm/slub.c:1268
Code: 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e8 5b fd ff ff be 01 00 00 00 bf 05 00 00 00 e8 6c 9c a3 00 90 <0f> 0b 90 e9 13 5a ad 0a 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0000:ffffc90007ec7828 EFLAGS: 00010046
RAX: 0000000000080000 RBX: ffffc90007ec7878 RCX: ffffc9000c4d2000
RDX: 0000000000080000 RSI: ffffffff81c7e99d RDI: ffff888044d38000
RBP: ffff88804be7d9d8 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000007918
R13: ffff88805d137df0 R14: ffff88804be7d9c0 R15: ffffea0001744c00
FS:  0000000000000000(0000) GS:ffff888096960000(0063) knlGS:00000000f5446b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000055ef01ec6770 CR3: 000000004d117000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 list_slab_objects mm/slub.c:8094 [inline]
 free_partial mm/slub.c:8115 [inline]
 __kmem_cache_shutdown.cold+0x16e/0x177 mm/slub.c:8158
 kmem_cache_destroy mm/slab_common.c:576 [inline]
 kmem_cache_destroy+0x7d/0x1a0 mm/slab_common.c:534
 shrink_stripes drivers/md/raid5.c:2719 [inline]
 free_conf+0x1cb/0x710 drivers/md/raid5.c:7553
 setup_conf+0xd80/0x2a20 drivers/md/raid5.c:7885
 raid5_takeover_raid1 drivers/md/raid5.c:8934 [inline]
 raid5_takeover+0x2b3/0x590 drivers/md/raid5.c:9045
 level_store+0x890/0x1f60 drivers/md/md.c:4134
 md_attr_store+0x1c5/0x330 drivers/md/md.c:6158
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6af/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f84fec
Code: Unable to access opcode bytes at 0xf7f84fc2.
RSP: 002b:00000000f544650c EFLAGS: 00000292 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000080000300
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>