High · published February 26, 2025
In the Linux kernel, the following vulnerability has been resolved:
block: Fix handling of offline queues in blk_mq_alloc_request_hctx()
This patch prevents that test nvme/004 triggers the following:
UBSAN: array-index-out-of-bounds in block/blk-mq.h:135:9
index 512 is out of range for type 'long unsigned int [512]'
Call Trace:
show_stack+0x52/0x58
dump_stack_lvl+0x49/0x5e
dump_stack+0x10/0x12
ubsan_epilogue+0x9/0x3b
__ubsan_handle_out_of_bounds.cold+0x44/0x49
blk_mq_alloc_request_hctx+0x304/0x310
__nvme_submit_sync_cmd+0x70/0x200 [nvme_core]
nvmf_connect_io_queue+0x23e/0x2a0 [nvme_fabrics]
nvme_loop_connect_io_queues+0x8d/0xb0 [nvme_loop]
nvme_loop_create_ctrl+0x58e/0x7d0 [nvme_loop]
nvmf_create_ctrl+0x1d7/0x4d0 [nvme_fabrics]
nvmf_dev_write+0xae/0x111 [nvme_fabrics]
vfs_write+0x144/0x560
ksys_write+0xb7/0x140
__x64_sys_write+0x42/0x50
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae