------------[ cut here ]------------
kmem_cache of name '9p-fcall-cache' already exists
WARNING: CPU: 0 PID: 4362 at mm/slab_common.c:113 kmem_cache_sanity_check mm/slab_common.c:112 [inline]
WARNING: CPU: 0 PID: 4362 at mm/slab_common.c:113 kmem_cache_create_usercopy+0xb6/0x370 mm/slab_common.c:316
Modules linked in:
CPU: 0 UID: 0 PID: 4362 Comm: syz.3.143 Not tainted 6.11.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:kmem_cache_sanity_check mm/slab_common.c:112 [inline]
RIP: 0010:kmem_cache_create_usercopy+0xb6/0x370 mm/slab_common.c:316
Code: 48 8b 6d 00 48 39 dd 74 25 48 8b 7d f8 4c 89 f6 e8 2f 64 a7 00 85 c0 75 e7 90 48 c7 c7 eb 1d 42 82 4c 89 f6 e8 3b ca e1 ff 90 <0f> 0b 90 90 4c 89 f7 be 20 00 00 00 e8 a9 64 a7 00 48 85 c0 0f 85
RSP: 0018:ffffc9000208bc38 EFLAGS: 00010246
RAX: 87844ba80d4b3d00 RBX: ffffffff827a54d0 RCX: 0000000000000002
RDX: ffff888237c29200 RSI: ffffffff824c511b RDI: 00000000ffffffff
RBP: ffff888101afcf68 R08: 0000000000000000 R09: ffffffff826c5f90
R10: ffffc9000208bb08 R11: ffffc9000208bab0 R12: 0000000000020018
R13: 0000000000000000 R14: ffffffff824e11c8 R15: 000000000000000b
FS:  00007fd686b996c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 000000010a7c4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 p9_client_create+0x56a/0x630 net/9p/client.c:1042
 v9fs_session_init+0xaf/0x770 fs/9p/v9fs.c:410
 v9fs_mount+0x58/0x300 fs/9p/vfs_super.c:122
 legacy_get_tree+0x2d/0x60 fs/fs_context.c:662
 vfs_get_tree+0x27/0xf0 fs/super.c:1800
 do_new_mount+0x15a/0x3a0 fs/namespace.c:3472
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount+0x148/0x1b0 fs/namespace.c:3997
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xe0/0x1f0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd68711def9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd686b99038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd6872d5f80 RCX: 00007fd68711def9
RDX: 00000000200002c0 RSI: 0000000020000080 RDI: 0000000000000000
RBP: 00007fd687190b76 R08: 0000000020000380 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd6872d5f80 R15: 00007ffca8db2a18
 </TASK>