bianbu-linux-6.6/net/9p
Linus Torvalds 9da3636a48 9p: fix slab cache name creation for real
commit a360f311f57a36e96d88fa8086b749159714dcd2 upstream.

This was attempted by using the dev_name in the slab cache name, but as
Omar Sandoval pointed out, that can be an arbitrary string, eg something
like "/dev/root".  Which in turn trips verify_dirent_name(), which fails
if a filename contains a slash.

So just make it use a sequence counter, and make it an atomic_t to avoid
any possible races or locking issues.

Reported-and-tested-by: Omar Sandoval <osandov@fb.com>
Link: https://lore.kernel.org/all/ZxafcO8KWMlXaeWE@telecaster.dhcp.thefacebook.com/
Fixes: 79efebae4afc ("9p: Avoid creating multiple slab caches with the same name")
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Dominique Martinet <asmadeus@codewreck.org>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-11-17 15:08:59 +01:00
..
client.c 9p: fix slab cache name creation for real 2024-11-17 15:08:59 +01:00
error.c 9p: fix a bunch of checkpatch warnings 2021-11-04 21:04:25 +09:00
Kconfig 9p: Remove INET dependency 2023-05-04 21:46:57 +01:00
Makefile 9p/trans_fd: split into dedicated module 2022-01-10 09:58:30 +09:00
mod.c net/p9: load default transports 2022-01-10 10:00:09 +09:00
protocol.c net: 9p: avoid freeing uninit memory in p9pdu_vreadf 2024-01-01 12:42:41 +00:00
protocol.h net/9p: add p9_msg_buf_size() 2022-10-05 07:05:41 +09:00
trans_common.c 9p: fix file headers 2021-11-03 17:45:04 +09:00
trans_common.h 9p: fix a bunch of checkpatch warnings 2021-11-04 21:04:25 +09:00
trans_fd.c 9p/trans_fd: Annotate data-racy writes to file::f_flags 2023-11-28 17:19:46 +00:00
trans_rdma.c 9p/rdma: unmap receive dma buffer in rdma_request()/post_recv() 2023-02-24 13:42:28 +00:00
trans_virtio.c 9p: virtio: skip incrementing unused variable 2023-07-20 19:14:50 +00:00
trans_xen.c 9p/xen : Fix use after free bug in xen_9pfs_front_remove due to race condition 2023-04-02 01:00:31 +00:00