kmalloc include/linux/slab.h:517 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 __alloc_workqueue_key+0x2b5/0x23b0 kernel/workqueue.c:4048
 create_fs_client fs/ceph/super.c:647 [inline]
 ceph_mount+0x108c/0x30a0 fs/ceph/super.c:1027
 mount_fs+0x29b/0x780 fs/super.c:1277
 vfs_kern_mount+0x222/0x990 fs/namespace.c:1037
 do_new_mount fs/namespace.c:2518 [inline]
 do_mount+0xca5/0x4ed0 fs/namespace.c:2848
general protection fault: 0000 [#1] SMP PTI
Dumping ftrace buffer:
 ksys_mount+0x32e/0x3d0 fs/namespace.c:3064
   (ftrace buffer empty)
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0x157/0x1c0 fs/namespace.c:3075
Modules linked in:
CPU: 1 PID: 27502 Comm: udevd Not tainted 4.17.0+ #9
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0010:bprm_fill_uid fs/exec.c:1522 [inline]
RIP: 0010:prepare_binprm+0x109/0xad0 fs/exec.c:1572
RIP: 0033:0x455a99
RSP: 0018:ffff88014cc2fc68 EFLAGS: 00010246
RSP: 002b:00007fe6b08aec68 EFLAGS: 00000246
 ORIG_RAX: 00000000000000a5
RAX: ffffffff8b58b000 RBX: 0000000000000000 RCX: ffff880000000000
RAX: ffffffffffffffda RBX: 00007fe6b08af6d4 RCX: 0000000000455a99
RDX: ffffffff8b58c000 RSI: 0000000000000004 RDI: 5c5c5c5c5c5c5c70
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000020000000
RBP: ffff88014cc2fcf8 R08: 0000000001080020 R09: 0000000000000002
RBP: 000000000072bea0 R08: 00000000200000c0 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff83ac4fe0 R12: ffffffff8b58b000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000013
R13: 0000000000000000 R14: 5c5c5c5c5c5c5c70 R15: ffff8800ac6240a0
FS:  00007f4f52d687a0(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
R13: 00000000004c1e89 R14: 00000000004cf510 R15: 000000000000005c
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000706194 CR3: 000000014915e000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 do_execveat_common+0x1ee4/0x2db0 fs/exec.c:1798
 do_execve fs/exec.c:1862 [inline]
 __do_sys_execve fs/exec.c:1943 [inline]
 __se_sys_execve fs/exec.c:1938 [inline]
 __x64_sys_execve+0x127/0x180 fs/exec.c:1938
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4f5244c207
RSP: 002b:00007fffd64a2e78 EFLAGS: 00000206 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f4f5244c207
RDX: 0000000000bae420 RSI: 00007fffd64a2f70 RDI: 00007fffd64a3f80
RBP: 0000000000625500 R08: 00000000000032f7 R09: 00000000000032f7
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000bae420
R13: 0000000000000007 R14: 0000000000ba9250 R15: 0000000000000005
Code: 44 8b 28 8b 02 89 45 bc 4c 89 f7 e8 d2 06 f2 ff 49 89 c4 48 83 7d b0 00 0f 85 fa 03 00 00 45 89 2c 24 45 85 ed 0f 85 02 04 00 00 <41> 89 1e 48 83 7d c0 00 0f 85 08 04 00 00 48 8b 7d a8 4c 8b 2f 
RIP: bprm_fill_uid fs/exec.c:1522 [inline] RSP: ffff88014cc2fc68
RIP: prepare_binprm+0x109/0xad0 fs/exec.c:1572 RSP: ffff88014cc2fc68
---[ end trace dbd19f8902597b2a ]---