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net: wwan: iosm: fix crash in peek throughput test 

[ Upstream commit 2290a1d46b ]

Peek throughput UL test is resulting in crash. If the UL
transfer block free list is exhaust, the peeked skb is freed.
In the next transfer freed skb is referred from UL list which
results in crash.

Don't free the skb if UL transfer blocks are unavailable. The
pending skb will be picked for transfer on UL transfer block
available.

Fixes: 1f52d7b622 ("net: wwan: iosm: Enable M.2 7360 WWAN card support")
Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
M Chetan Kumar 2022-11-24 16:08:17 +05:30 committed by Greg Kroah-Hartman
parent 7d68b73349
commit 20be3364c5
1 changed files with 2 additions and 3 deletions
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5
drivers/net/wwan/iosm/iosm_ipc_mux_codec.c
View File

@ -1207,10 +1207,9 @@ static int mux_ul_dg_update_tbl_index(struct iosm_mux *ipc_mux,
qlth_n_ql_size, ul_list);
ipc_mux_ul_adb_finish(ipc_mux);
if (ipc_mux_ul_adb_allocate(ipc_mux, adb, &ipc_mux->size_needed,
IOSM_AGGR_MUX_SIG_ADBH)) {
dev_kfree_skb(src_skb);
IOSM_AGGR_MUX_SIG_ADBH))
return -ENOMEM;
}
ipc_mux->size_needed = le32_to_cpu(adb->adbh->block_length);
ipc_mux->size_needed += offsetof(struct mux_adth, dg);