------------[ cut here ]------------
kmem_cache of name '9p-fcall-cache-(null)' already exists
WARNING: CPU: 1 PID: 61796 at mm/slab_common.c:107 __kmem_cache_create_args+0xaf/0x370
Modules linked in:
CPU: 1 UID: 0 PID: 61796 Comm: syz-executor.7 Not tainted 6.12.0-rc3-next-20241016 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__kmem_cache_create_args+0xaf/0x370
Code: 98 48 3d 30 98 cc 85 74 25 48 8b 7b 60 4c 89 e6 e8 76 ee 09 03 85 c0 75 e0 90 48 c7 c7 d8 35 6e 85 4c 89 e6 e8 22 29 a4 ff 90 <0f> 0b 90 90 be 20 00 00 00 4c 89 e7 e8 f0 ef 09 03 48 85 c0 0f 85
RSP: 0018:ffff88802ba27930 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88800b4cfc80 RCX: ffffc90008a20000
RDX: 0000000000040000 RSI: ffffffff8118b52f RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005744ed7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88803f3a2940
R13: 0000000000020018 R14: ffff88802ba27a10 R15: 0000000000000000
FS:  00007f89fcbf1700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556b4fec58 CR3: 000000003eae6000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 p9_client_create+0xde4/0x11a0
 v9fs_session_init+0x1e0/0x17b0
 v9fs_mount+0xbd/0x9b0
 legacy_get_tree+0x109/0x220
 vfs_get_tree+0x97/0x380
 path_mount+0x13b2/0x1ec0
 __x64_sys_mount+0x283/0x300
 do_syscall_64+0xbf/0x1d0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89ff67bb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f89fcbf1188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f89ff78ef60 RCX: 00007f89ff67bb19
RDX: 0000000020000080 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007f89ff6d5f6d R08: 00000000200001c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffec4118fcf R14: 00007f89fcbf1300 R15: 0000000000022000
 </TASK>
irq event stamp: 4853
hardirqs last  enabled at (4863): [<ffffffff813247f8>] __up_console_sem+0x78/0x80
hardirqs last disabled at (4902): [<ffffffff813247dd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (4654): [<ffffffff811a7dec>] handle_softirqs+0x50c/0x770
softirqs last disabled at (4579): [<ffffffff811a87f4>] irq_exit_rcu+0x94/0xc0
---[ end trace 0000000000000000 ]---
netlink: 'syz-executor.4': attribute type 4 has an invalid length.
netlink: 'syz-executor.4': attribute type 4 has an invalid length.
netlink: 'syz-executor.4': attribute type 4 has an invalid length.
netlink: 'syz-executor.4': attribute type 4 has an invalid length.
netlink: 'syz-executor.0': attribute type 4 has an invalid length.
netlink: 'syz-executor.7': attribute type 4 has an invalid length.
netlink: 'syz-executor.2': attribute type 4 has an invalid length.
netlink: 'syz-executor.3': attribute type 4 has an invalid length.
netlink: 'syz-executor.7': attribute type 4 has an invalid length.
netlink: 'syz-executor.0': attribute type 4 has an invalid length.
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