Уязвимость функции btrfs_use_block_rsv() в модуле fs/btrfs/block-rsv.c файловой системы btrfs ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Множественные уязвимости kernel-lt

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

A data race vulnerability in the `btrfs_use_block_rsv()` function in the Linux kernel's btrfs filesystem code has been resolved. This issue led to inconsistent block reserve management, potentially causing data corruption or other filesystem errors.

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix data race at btrfs_use_block_rsv() when accessing block reserve At btrfs_use_block_rsv() we read the size of a block reserve without locking its spinlock, which makes KCSAN complain because the size of a block reserve is always updated while holding its spinlock. The report from KCSAN is the following: [653.313148] BUG: KCSAN: data-race in btrfs_update_delayed_refs_rsv [btrfs] / btrfs_use_block_rsv [btrfs] [653.314755] read to 0x000000017f5871b8 of 8 bytes by task 7519 on cpu 0: [653.314779] btrfs_use_block_rsv+0xe4/0x2f8 [btrfs] [653.315606] btrfs_alloc_tree_block+0xdc/0x998 [btrfs] [653.316421] btrfs_force_cow_block+0x220/0xe38 [btrfs] [653.317242] btrfs_cow_block+0x1ac/0x568 [btrfs] [653.318060] btrfs_search_slot+0xda2/0x19b8 [btrfs] [653.318879] btrfs_del_csums+0x1dc/0x798 [btrfs] [653.319702] __btrfs_free_extent.isra.0+0xc24/0x2028 [btrfs] [653.320538] __btrfs_run_dela...