High · published July 12, 2024
In the Linux kernel, the following vulnerability has been resolved:
scsi: mpt3sas: Avoid test/set_bit() operating in non-allocated memory
There is a potential out-of-bounds access when using test_bit() on a single
word. The test_bit() and set_bit() functions operate on long values, and
when testing or setting a single word, they can exceed the word
boundary. KASAN detects this issue and produces a dump:
BUG: KASAN: slab-out-of-bounds in _scsih_add_device.constprop.0 (./arch/x86/include/asm/bitops.h:60 ./include/asm-generic/bitops/instrumented-atomic.h:29 drivers/scsi/mpt3sas/mpt3sas_scsih.c:7331) mpt3sas
Write of size 8 at addr ffff8881d26e3c60 by task kworker/u1536:2/2965
For full log, please look at [1].
Make the allocation at least the size of sizeof(unsigned long) so that
set_bit() and test_bit() have sufficient room for read/write operations
without overwriting unallocated memory.
[1] Link: https://lore.kernel.org/all/[email protected]/
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 4.10, < 4.19.317 | 4.19.317 |
| linux/linux_kernel | ≥ 4.20, < 5.4.279 | 5.4.279 |
| linux/linux_kernel | ≥ 5.5, < 5.10.221 | 5.10.221 |
| linux/linux_kernel | ≥ 5.11, < 5.15.162 | 5.15.162 |
| linux/linux_kernel | ≥ 5.16, < 6.1.95 | 6.1.95 |
| linux/linux_kernel | ≥ 6.2, < 6.6.35 | 6.6.35 |
| linux/linux_kernel | ≥ 6.7, < 6.9.6 | 6.9.6 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |