CVE-2022-50752 in Linux
Сводка
по VulDB • 23.05.2026
В ядре Linux устранена следующая уязвимость:
md/raid5: Удаление ненужного вызова bio_put() в функции raid5_read_one_chunk()
При выполнении чтений размером с чанк на дисках с badblocks наблюдаются дублирующиеся операции освобождения/вызова bio_put() для объектов bio:
============================================================================= BUG bio-200 (Not tainted): Object already free ----------------------------------------------------------------------------- Allocated in mempool_alloc_slab+0x17/0x20 age=3 cpu=2 pid=7504 __slab_alloc.constprop.0+0x5a/0xb0 kmem_cache_alloc+0x31e/0x330 mempool_alloc_slab+0x17/0x20 mempool_alloc+0x100/0x2b0 bio_alloc_bioset+0x181/0x460 do_mpage_readpage+0x776/0xd00 mpage_readahead+0x166/0x320 blkdev_readahead+0x15/0x20 read_pages+0x13f/0x5f0 __do_page_cache_readahead+0x298/0x380 ondemand_readahead+0x198/0x280 page_cache_ra_unbounded+0x100/0x140 filemap_fault+0x1038/0x12a0 __do_fault+0x36/0x100 do_fault+0x338/0x8f0 handle_mm_fault+0x6e0/0x10f0 __do_page_fault+0x25a/0x510 do_page_fault+0x2e/0x100 page_fault+0x2e/0x40 RIP: 0010:copy_user_enhanced_fast_string+0x10/0x20 RSP: 0018:ffffc90000097d78 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8881206d8940 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881206d8940 RBP: ffffc90000097d98 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8881206d8940 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888120600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0000000000 CR3: 0000000000000000 CR4: 0000000000000000 Call Trace: <TASK> copy_user_enhanced_fast_string+0x10/0x20 copy_to_user+0x28/0x50 copy_to_iter+0x100/0x180 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x20 copy_page_to_iter+0x10/0x2
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