CVE-2022-49160

In the Linux kernel, the following vulnerability has been resolved:

scsi: qla2xxx: Fix crash during module load unload test

During purex packet handling the driver was incorrectly freeing a pre-allocated structure. Fix this by skipping that entry.

System crashed with the following stack during a module unload test.

Call Trace: sbitmap_init_node+0x7f/0x1e0 sbitmap_queue_init_node+0x24/0x150 blk_mq_init_bitmaps+0x3d/0xa0 blk_mq_init_tags+0x68/0x90 blk_mq_alloc_map_and_rqs+0x44/0x120 blk_mq_alloc_set_map_and_rqs+0x63/0x150 blk_mq_alloc_tag_set+0x11b/0x230 scsi_add_host_with_dma.cold+0x3f/0x245 qla2x00_probe_one+0xd5a/0x1b80 [qla2xxx]

Call Trace with slub_debug and debug kernel: kasan_report_invalid_free+0x50/0x80 __kasan_slab_free+0x137/0x150 slab_free_freelist_hook+0xc6/0x190 kfree+0xe8/0x2e0 qla2x00_free_device+0x3bb/0x5d0 [qla2xxx] qla2x00_remove_one+0x668/0xcf0 [qla2xxx]

Affected Software

References

• https://git.kernel.org/stable/c/0972252450f90db56dd5415a20e2aec21a08d036
• https://git.kernel.org/stable/c/213e57b42537f1a2e5395caa9d7189854133ed12
• https://git.kernel.org/stable/c/67f744f73eba870ab96411d0310e831a4adc3713
• https://git.kernel.org/stable/c/9b7eb92dac240ab3bc83e188d83a3df834b41eb2