syzbot

==================================================================
BUG: KFENCE: memory corruption in p9_fcall_fini net/9p/client.c:248 [inline]
BUG: KFENCE: memory corruption in p9_req_put net/9p/client.c:396 [inline]
BUG: KFENCE: memory corruption in p9_req_put+0x208/0x250 net/9p/client.c:390

Corrupted memory at 0xffff88823bd7c016 [ 0x00 . . . . . . . . . . . . . . . ] (in kfence-#189):
 p9_fcall_fini net/9p/client.c:248 [inline]
 p9_req_put net/9p/client.c:396 [inline]
 p9_req_put+0x208/0x250 net/9p/client.c:390
 p9_client_walk+0x247/0x540 net/9p/client.c:1165
 v9fs_vfs_lookup.part.0+0x143/0x5d0 fs/9p/vfs_inode.c:777
 v9fs_vfs_lookup+0x6d/0x90 fs/9p/vfs_inode.c:762
 __lookup_slow+0x24c/0x460 fs/namei.c:1685
 lookup_slow fs/namei.c:1702 [inline]
 walk_component+0x33f/0x5a0 fs/namei.c:1993
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x1ba/0x840 fs/namei.c:2474
 filename_lookup+0x1d2/0x590 fs/namei.c:2503
 vfs_statx+0x14c/0x430 fs/stat.c:229
 vfs_fstatat+0x90/0xb0 fs/stat.c:267
 vfs_stat include/linux/fs.h:3292 [inline]
 __do_sys_newstat+0x8b/0x110 fs/stat.c:410
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

kfence-#189: 0xffff88823bd7c000-0xffff88823bd7c015, size=22, cache=kmalloc-32

allocated by task 641 on cpu 0 at 2864.879249s:
 kmalloc include/linux/slab.h:558 [inline]
 p9_fcall_init+0x97/0x210 net/9p/client.c:228
 p9_tag_alloc+0x208/0x840 net/9p/client.c:293
 p9_client_prepare_req+0x177/0x590 net/9p/client.c:631
 p9_client_rpc+0x1a1/0xd70 net/9p/client.c:678
 p9_client_walk+0x1a0/0x540 net/9p/client.c:1152
 v9fs_vfs_lookup.part.0+0x143/0x5d0 fs/9p/vfs_inode.c:777
 v9fs_vfs_lookup+0x6d/0x90 fs/9p/vfs_inode.c:762
 __lookup_slow+0x24c/0x460 fs/namei.c:1685
 lookup_slow fs/namei.c:1702 [inline]
 walk_component+0x33f/0x5a0 fs/namei.c:1993
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x1ba/0x840 fs/namei.c:2474
 filename_lookup+0x1d2/0x590 fs/namei.c:2503
 vfs_statx+0x14c/0x430 fs/stat.c:229
 vfs_fstatat+0x90/0xb0 fs/stat.c:267
 vfs_stat include/linux/fs.h:3292 [inline]
 __do_sys_newstat+0x8b/0x110 fs/stat.c:410
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

freed by task 641 on cpu 0 at 2864.887801s:
 p9_fcall_fini net/9p/client.c:248 [inline]
 p9_req_put net/9p/client.c:396 [inline]
 p9_req_put+0x208/0x250 net/9p/client.c:390
 p9_client_walk+0x247/0x540 net/9p/client.c:1165
 v9fs_vfs_lookup.part.0+0x143/0x5d0 fs/9p/vfs_inode.c:777
 v9fs_vfs_lookup+0x6d/0x90 fs/9p/vfs_inode.c:762
 __lookup_slow+0x24c/0x460 fs/namei.c:1685
 lookup_slow fs/namei.c:1702 [inline]
 walk_component+0x33f/0x5a0 fs/namei.c:1993
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x1ba/0x840 fs/namei.c:2474
 filename_lookup+0x1d2/0x590 fs/namei.c:2503
 vfs_statx+0x14c/0x430 fs/stat.c:229
 vfs_fstatat+0x90/0xb0 fs/stat.c:267
 vfs_stat include/linux/fs.h:3292 [inline]
 __do_sys_newstat+0x8b/0x110 fs/stat.c:410
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

CPU: 0 PID: 641 Comm: syz-executor.2 Not tainted 6.1.0-rc5-syzkaller-00144-g84368d882b96 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
==================================================================