Description
In the Linux kernel, the following vulnerability has been resolved: cpufreq: imx6q: fix out-of-bounds write when probed more than once imx6_soc_volt is allocated fresh on every probe, sized to the number of ARM OPPs: imx6_soc_volt = devm_kcalloc(cpu_dev, num, sizeof(*imx6_soc_volt), GFP_KERNEL); but it is filled through soc_opp_count, which has static storage and is never reset. A second bind after an unbind keeps indexing from where the first one stopped, and writes past the end of the new array. Unbinding and rebinding the driver on qemu's mcimx6ul-evk, under KASAN: BUG: KASAN: slab-out-of-bounds in imx6q_cpufreq_probe+0x3b0/0xa34 Write of size 4 at addr c5e90480 by task binder/73 imx6q_cpufreq_probe from platform_probe+0x88/0xe4 platform_probe from really_probe+0x108/0x384 bind_store from kernfs_fop_write_iter+0x1b4/0x28c The write lands one u32 past the end of the allocation. soc_opp_count is only read a few lines below the loop that fills it, so it never needed static storage. Make it a local.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < 263a35331169390f7f9ccb51d74e668610199af4affectedb4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < 49f2f9b1d0cc76cf221306fc707703205bd27073affectedb4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < c5135bc34ea37e9d19f758e61ac44415afb3891aaffectedb4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < 55864b26c22cbd4b2e0d36154a8c35931c2e133baffectedb4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < b166bb79b7ef36b4f1d6d1f40d1a72b2eb0a56b9affectedb4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < aaa66e60c0e21d19993a95bc3718dc29eb2d3192affectedb4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < 55516986a3d81325c84f2d4ae9cd03116bc63599affectedb4573d1d657aae28bedf3a9a1f5367e09c80d1d6 to < 8c3afcf27fa4582c1ab912503dc8a4ebb8dc0f82affected
Linux Linux
Default version status: affected
3.14affected0 to < 3.14unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/263a35331169390f7f9ccb51d74e668610199af4 ↗
- https://git.kernel.org/stable/c/49f2f9b1d0cc76cf221306fc707703205bd27073 ↗
- https://git.kernel.org/stable/c/c5135bc34ea37e9d19f758e61ac44415afb3891a ↗
- https://git.kernel.org/stable/c/55864b26c22cbd4b2e0d36154a8c35931c2e133b ↗
- https://git.kernel.org/stable/c/b166bb79b7ef36b4f1d6d1f40d1a72b2eb0a56b9 ↗
- https://git.kernel.org/stable/c/aaa66e60c0e21d19993a95bc3718dc29eb2d3192 ↗
- https://git.kernel.org/stable/c/55516986a3d81325c84f2d4ae9cd03116bc63599 ↗
- https://git.kernel.org/stable/c/8c3afcf27fa4582c1ab912503dc8a4ebb8dc0f82 ↗