On 9/22/21 11:50 AM, Bart Van Assche wrote: > Skip queue mapping for shared tag sets. This patch fixes the following bug: > > ================================================================== > BUG: KASAN: null-ptr-deref in null_map_queues+0x131/0x1a0 [null_blk] > Read of size 8 at addr 0000000000000000 by task modprobe/4320 > > CPU: 9 PID: 4320 Comm: modprobe Tainted: G E 5.15.0-rc2-dbg+ #2 > Call Trace: > show_stack+0x52/0x58 > dump_stack_lvl+0x49/0x5e > kasan_report.cold+0x64/0xdb > __asan_load8+0x69/0x90 > null_map_queues+0x131/0x1a0 [null_blk] > blk_mq_update_queue_map+0x122/0x1a0 > blk_mq_alloc_tag_set+0x1e8/0x570 > null_init_tag_set+0x197/0x220 [null_blk] > null_init+0x1dc/0x1000 [null_blk] > do_one_initcall+0xc7/0x440 > do_init_module+0x10a/0x3d0 > load_module+0x115c/0x1220 > __do_sys_finit_module+0x124/0x1a0 > __x64_sys_finit_module+0x42/0x50 > do_syscall_64+0x35/0xb0 > entry_SYSCALL_64_after_hwframe+0x44/0xae Thanks Bart, do you mind if I fold this one in? I can add a Fixes-by tag as well. -- Jens Axboe
