جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: edif: Fix NULL pointer deref in RX SA delete check qla_chk_edif_rx_sa_delete_pending() obtains the SCSI command via GET_CMD_SP(sp) and immediately dereferences cmd->sc_data_direction. That command pointer can be NULL: the firmware may post a status completion for a command that has already been returned or aborted. The caller qla2x00_status_entry() acknowledges this on the very same status path, re-fetching GET_CMD_SP(sp) and bailing out with the "Command already returned" message when it is NULL -- but that check runs only after qla_chk_edif_rx_sa_delete_pending() has already dereferenced the pointer, so a NULL cmd crashes the kernel in interrupt context. Return early when cmd is NULL, before touching cmd->sc_data_direction.

• https://git.kernel.org/stable/c/e479e9b148456905d12711411484b94083c8ff58
• https://git.kernel.org/stable/c/2191b0034a2f1307d421782e6eceddf8eec9e7f6
• https://git.kernel.org/stable/c/de0c8ef3b900c5e971c82ef38c6f5c22c5f3d8c1
• https://git.kernel.org/stable/c/96eb8a3fc9f7fe7ba32679fcf1d2fd7d251e7a8b
• https://git.kernel.org/stable/c/94bfb61478bcb207d27f8cd24fd231421059519f
• https://git.kernel.org/stable/c/75fd6d041c4a325ae37f4683e6678d3015988bb0
• https://git.kernel.org/stable/c/c20ee380ca59c5a8646750c4849969a815924e2e