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| author | Yunsheng Lin <linyunsheng@huawei.com> | 2024-04-28 14:16:38 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-05-01 04:30:43 +0300 |
| commit | 9f8eeea1643c213c0e1ad2e546a15536200d216b (patch) | |
| tree | 01122840aeefafa388129b6b082332beaa5d91a5 /net/rxrpc/rxkad.c | |
| parent | ba1cb99b559e3b12db8b65ca9ff03358ea318064 (diff) | |
| download | linux-9f8eeea1643c213c0e1ad2e546a15536200d216b.tar.xz | |
rxrpc: Fix using alignmask being zero for __page_frag_alloc_align()
rxrpc_alloc_data_txbuf() may be called with data_align being
zero in none_alloc_txbuf() and rxkad_alloc_txbuf(), data_align
is supposed to be an order-based alignment value, but zero is
not a valid order-based alignment value, and '~(data_align - 1)'
doesn't result in a valid mask-based alignment value for
__page_frag_alloc_align().
Fix it by passing a valid order-based alignment value in
none_alloc_txbuf() and rxkad_alloc_txbuf().
Also use page_frag_alloc_align() expecting an order-based
alignment value in rxrpc_alloc_data_txbuf() to avoid doing the
alignment converting operation and to catch possible invalid
alignment value in the future. Remove the 'if (data_align)'
checking too, as it is always true for a valid order-based
alignment value.
Fixes: 6b2536462fd4 ("rxrpc: Fix use of changed alignment param to page_frag_alloc_align()")
Fixes: 49489bb03a50 ("rxrpc: Do zerocopy using MSG_SPLICE_PAGES and page frags")
CC: Alexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Acked-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20240428111640.27306-1-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/rxrpc/rxkad.c')
| -rw-r--r-- | net/rxrpc/rxkad.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c index f1a68270862d..48a1475e6b06 100644 --- a/net/rxrpc/rxkad.c +++ b/net/rxrpc/rxkad.c @@ -155,7 +155,7 @@ static struct rxrpc_txbuf *rxkad_alloc_txbuf(struct rxrpc_call *call, size_t rem switch (call->conn->security_level) { default: space = min_t(size_t, remain, RXRPC_JUMBO_DATALEN); - return rxrpc_alloc_data_txbuf(call, space, 0, gfp); + return rxrpc_alloc_data_txbuf(call, space, 1, gfp); case RXRPC_SECURITY_AUTH: shdr = sizeof(struct rxkad_level1_hdr); break; |