------------[ cut here ]------------
kmem_cache of name '9p-fcall-cache-(null)' already exists
WARNING: CPU: 0 PID: 8144 at mm/slab_common.c:108 kmem_cache_sanity_check mm/slab_common.c:107 [inline]
WARNING: CPU: 0 PID: 8144 at mm/slab_common.c:108 __kmem_cache_create_args+0xb4/0x334 mm/slab_common.c:294
Modules linked in:
CPU: 0 UID: 0 PID: 8144 Comm: syz.6.432 Not tainted 6.12.0-rc4-syzkaller-g7678c1b2735a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kmem_cache_sanity_check mm/slab_common.c:107 [inline]
pc : __kmem_cache_create_args+0xb4/0x334 mm/slab_common.c:294
lr : kmem_cache_sanity_check mm/slab_common.c:107 [inline]
lr : __kmem_cache_create_args+0xb4/0x334 mm/slab_common.c:294
sp : ffff8000a30174c0
x29: ffff8000a30174c0 x28: dfff800000000000 x27: 1fffe0001a23e709
x26: 0000000000000000 x25: 0000000000020018 x24: ffff80008fab3288
x23: ffff0000d5c06a68 x22: 0000000000020018 x21: ffff8000a30175a0
x20: 0000000000000000 x19: ffff0000cfcd2d80 x18: 0000000000000008
x17: 0000000000000000 x16: ffff8000830c650c x15: 0000000000000001
x14: 1fffe000366c70e2 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000040000 x10: 0000000000002ec4 x9 : cfcdaf315f2d1700
x8 : cfcdaf315f2d1700 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff8000a3016bf8 x4 : ffff80008f8edac0 x3 : ffff80008062afe0
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
Call trace:
 kmem_cache_sanity_check mm/slab_common.c:107 [inline] (P)
 __kmem_cache_create_args+0xb4/0x334 mm/slab_common.c:294 (P)
 kmem_cache_sanity_check mm/slab_common.c:107 [inline] (L)
 __kmem_cache_create_args+0xb4/0x334 mm/slab_common.c:294 (L)
 kmem_cache_create_usercopy include/linux/slab.h:361 [inline]
 p9_client_create+0xac0/0xed0 net/9p/client.c:1049
 v9fs_session_init+0x190/0x16ec fs/9p/v9fs.c:410
 v9fs_mount+0xd4/0x92c fs/9p/vfs_super.c:122
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3507
 path_mount+0x590/0xe04 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount fs/namespace.c:4032 [inline]
 __arm64_sys_mount+0x45c/0x5a8 fs/namespace.c:4032
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp: 412
hardirqs last  enabled at (411): [<ffff8000803a0498>] __up_console_sem kernel/printk/printk.c:344 [inline]
hardirqs last  enabled at (411): [<ffff8000803a0498>] __console_unlock+0x70/0xc4 kernel/printk/printk.c:2844
hardirqs last disabled at (412): [<ffff80008b49cd20>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488
softirqs last  enabled at (262): [<ffff80008003084c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (260): [<ffff800080030818>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---