Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry() qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL check and again when assigning it to req. The map slot is cleared by qla25xx_free_req_que() (ha->req_q_map[que_id] = NULL under mq_lock) during queue teardown, while the response-queue interrupt that drives qla2x00_error_entry() is still registered (the IRQ is released later in qla25xx_free_rsp_que()). If the slot is set to NULL between the two reads, req becomes NULL and is dereferenced. Read the slot once into req and NULL-check the local before use. mq_lock is a mutex and cannot be taken from interrupt context, so the single read plus local check is the appropriate fix for the reported NULL dereference.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before c845f2597787ef70159a32566669e308b2807a56; affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before fe04b31e386aee4cc3a18f07462af146037dc389; affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before 1b995cf4157465357d66ba096e7cdaafab9972e7; affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before d79376fbd2a076de82c1cd8aa0b600b300c75a44; affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before 1c90b74e484ba48f31944fe04963d99e01ac3767; affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before 5dd9bec8004ba93cee8b689bf54ce294f59e5e3c; affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before 35124cfa9898b2088ee72859e573e0876aff66fc; affected a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b before deb8abde83a799d2501f3977f6d6051000253f5e |
| Linux / Linux | affected 3.4; unaffected 0 before 3.4; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c845f2597787ef70159a32566669e308b2807a56
- https://git.kernel.org/stable/c/fe04b31e386aee4cc3a18f07462af146037dc389
- https://git.kernel.org/stable/c/1b995cf4157465357d66ba096e7cdaafab9972e7
- https://git.kernel.org/stable/c/d79376fbd2a076de82c1cd8aa0b600b300c75a44
- https://git.kernel.org/stable/c/1c90b74e484ba48f31944fe04963d99e01ac3767
- https://git.kernel.org/stable/c/5dd9bec8004ba93cee8b689bf54ce294f59e5e3c
- https://git.kernel.org/stable/c/35124cfa9898b2088ee72859e573e0876aff66fc
- https://git.kernel.org/stable/c/deb8abde83a799d2501f3977f6d6051000253f5e