"value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"block, bfq: merge bfq_release_process_ref() into bfq_put_cooperator()\"\n\nThisrevertscommitbc3b1e9e7c50e1de0f573eea3871db61dd4787de.\n\nThebicisassociatedwithsync_bfqq,andbfq_release_process_refcannot\nbeputintobfq_put_cooperator.\n\nkasanreport:\n[400.347277]==================================================================\n[400.347287]BUG:KASAN:slab-use-after-freeinbic_set_bfqq+0x200/0x230\n[400.347420]Readofsize8ataddrffff88881cab7d60bytaskdockerd/5800\n[400.347430]\n[400.347436]CPU:24UID:0PID:5800Comm:dockerdKdump:loadedTainted:GE6.12.0#32\n[400.347450]Tainted:[E]=UNSIGNED_MODULE\n[400.347454]Hardwarename:VMware,Inc.VMware20,1/440BXDesktopReferencePlatform,BIOSVMW201.00V.20192059.B64.220728071307/28/2022\n[400.347460]CallTrace:\n[400.347464]<TASK>\n[400.347468]dump_stack_lvl+0x5d/0x80\n[400.347490]print_report+0x174/0x505\n[400.347521]kasan_report+0xe0/0x160\n[400.347541]bic_set_bfqq+0x200/0x230\n[400.347549]bfq_bic_update_cgroup+0x419/0x740\n[400.347560]bfq_bio_merge+0x133/0x320\n[400.347584]blk_mq_submit_bio+0x1761/0x1e20\n[400.347625]__submit_bio+0x28b/0x7b0\n[400.347664]submit_bio_noacct_nocheck+0x6b2/0xd30\n[400.347690]iomap_readahead+0x50c/0x680\n[400.347731]read_pages+0x17f/0x9c0\n[400.347785]page_cache_ra_unbounded+0x366/0x4a0\n[400.347795]filemap_fault+0x83d/0x2340\n[400.347819]__xfs_filemap_fault+0x11a/0x7d0[xfs]\n[400.349256]__do_fault+0xf1/0x610\n[400.349270]do_fault+0x977/0x11a0\n[400.349281]__handle_mm_fault+0x5d1/0x850\n[400.349314]handle_mm_fault+0x1f8/0x560\n[400.349324]do_user_addr_fault+0x324/0x970\n[400.349337]exc_page_fault+0x76/0xf0\n[400.349350]asm_exc_page_fault+0x26/0x30\n[400.349360]RIP:0033:0x55a480d77375\n[400.349384]Code:cccccccccccccccccccccccccccccccccccccccccc493b66100f86ae020000554889e54883ec58488b10<83>7a10000f8427020000440fb64228440fb64a294180\n[400.349392]RSP:002b:00007f18c37fd8b8EFLAGS:00010216\n[400.349401]RAX:00007f18c37fd9d0RBX:0000000000000000RCX:0000000000000000\n[400.349407]RDX:000055a484407d38RSI:000000c000e8b0c0RDI:0000000000000000\n[400.349412]RBP:00007f18c37fd910R08:000055a484017f60R09:000055a484066f80\n[400.349417]R10:0000000000194000R11:0000000000000005R12:0000000000000008\n[400.349422]R13:0000000000000000R14:000000c000476a80R15:0000000000000000\n[400.349430]</TASK>\n[400.349452]\n[400.349454]Allocatedbytask5800:\n[400.349459]kasan_save_stack+0x30/0x50\n[400.349469]kasan_save_track+0x14/0x30\n[400.349475]__kasan_slab_alloc+0x89/0x90\n[400.349482]kmem_cache_alloc_node_noprof+0xdc/0x2a0\n[400.349492]bfq_get_queue+0x1ef/0x1100\n[400.349502]__bfq_get_bfqq_handle_split+0x11a/0x510\n[400.349511]bfq_insert_requests+0xf55/0x9030\n[400.349519]blk_mq_flush_plug_list+0x446/0x14c0\n[400.349527]__blk_flush_plug+0x27c/0x4e0\n[400.349534]blk_finish_plug+0x52/0xa0\n[400.349540]_xfs_buf_ioapply+0x739/0xc30[xfs]\n[400.350246]__xfs_buf_submit+0x1b2/0x640[xfs]\n[400.350967]xfs_buf_read_map+0x306/0xa20[xfs]\n[400.351672]xfs_trans_read_buf_map+0x285/0x7d0[xfs]\n[400.352386]xfs_imap_to_bp+0x107/0x270[xfs]\n[400.353077]xfs_iget+0x70d/0x1eb0[xfs]\n[400.353786]xfs_lookup+0x2ca/0x3a0[xfs]\n[400.354506]xfs_vn_lookup+0x14e/0x1a0[xfs]\n[400.355197]__lookup_slow+0x19c/0x340\n[400.355204]lookup_one_unlocked+0xfc/0x120\n[400.355211]ovl_lookup_single+0x1b3/0xcf0[overlay]\n[400.355255]ovl_lookup_layer+0x316/0x490[overlay]\n[400.355295]ovl_lookup+0x844/0x1fd0[overlay]\n[400.355351]lookup_one_qstr_excl+0xef/0x150\n[400.355357]do_unlinkat+0x22a/0x620\n[400.355366]__x64_sys_unlinkat+0x109/0x1e0\n[400.355375]do_syscall_64+0x82/0x160\n[400.355384]entry_SYSCALL_64_after_hwframe+0x76/0x7\n---truncated---