Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix NULL sndbuf_desc in smc_cdc_tx_handler() When performing a stress test on SMC-R by rmmod mlx5_ib driver during the wrk/nginx test, we found that there is a probability of triggering a panic while terminating all link groups. This issue dues to the race between smc_smcr_terminate_all() and smc_buf_create(). smc_smcr_terminate_all smc_buf_create /* init */ conn->sndbuf_desc = NULL; ... __smc_lgr_terminate smc_conn_kill smc_close_abort smc_cdc_get_slot_and_msg_send __softirqentry_text_start smc_wr_tx_process_cqe smc_cdc_tx_handler READ(conn->sndbuf_desc->len); /* panic dues to NULL sndbuf_desc */ conn->sndbuf_desc = xxx; This patch tries to fix the issue by always to check the sndbuf_desc before send any cdc msg, to make sure that no null pointer is seen during cqe processing.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0b29ec6436138721acf5844e558f7334a0fa61d5 before 31817c530768b0199771ec6019571b4f0ddbf230; affected 0b29ec6436138721acf5844e558f7334a0fa61d5 before b108bd9e6be000492ebebe867daa699285978a10; affected 0b29ec6436138721acf5844e558f7334a0fa61d5 before 3c270435db8aa34929263dddae8fd050f5216ecb; affected 0b29ec6436138721acf5844e558f7334a0fa61d5 before 3ebac7cf0a184a8102821a7a00203f02bebda83c; affected 0b29ec6436138721acf5844e558f7334a0fa61d5 before 22a825c541d775c1dbe7b2402786025acad6727b |
| Linux / Linux | affected 5.5; unaffected 0 before 5.5; unaffected 5.10.176 through 5.10.*; unaffected 5.15.104 through 5.15.*; unaffected 6.1.21 through 6.1.*; unaffected 6.2.8 through 6.2.*; unaffected 6.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/31817c530768b0199771ec6019571b4f0ddbf230
- https://git.kernel.org/stable/c/b108bd9e6be000492ebebe867daa699285978a10
- https://git.kernel.org/stable/c/3c270435db8aa34929263dddae8fd050f5216ecb
- https://git.kernel.org/stable/c/3ebac7cf0a184a8102821a7a00203f02bebda83c
- https://git.kernel.org/stable/c/22a825c541d775c1dbe7b2402786025acad6727b
ADP enrichment
No English description supplied.
No references supplied.