CVE-2024-35785

In the Linux kernel, the following vulnerability has been resolved:

tee: optee: Fix kernel panic caused by incorrect error handling

The error path while failing to register devices on the TEE bus has a bug leading to kernel panic as follows:

[ 15.398930] Unable to handle kernel paging request at virtual address ffff07ed00626d7c [ 15.406913] Mem abort info: [ 15.409722] ESR = 0x0000000096000005 [ 15.413490] EC = 0x25: DABT (current EL), IL = 32 bits [ 15.418814] SET = 0, FnV = 0 [ 15.421878] EA = 0, S1PTW = 0 [ 15.425031] FSC = 0x05: level 1 translation fault [ 15.429922] Data abort info: [ 15.432813] ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 [ 15.438310] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 15.443372] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 15.448697] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000d9e3e000 [ 15.455413] [ffff07ed00626d7c] pgd=1800000bffdf9003, p4d=1800000bffdf9003, pud=0000000000000000 [ 15.464146] Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP

Commit 7269cba53d90 (tee: optee: Fix supplicant based device enumeration) lead to the introduction of this bug. So fix it appropriately.

Affected Software

References

• https://git.kernel.org/stable/c/4b12ff5edd141926d49c9ace4791adf3a4902fe7
• https://git.kernel.org/stable/c/520f79c110ff712b391b3d87fcacf03c74bc56ee
• https://git.kernel.org/stable/c/95915ba4b987cf2b222b0f251280228a1ff977ac
• https://git.kernel.org/stable/c/bc40ded92af55760d12bec8222d4108de725dbe4
• https://git.kernel.org/stable/c/bfa344afbe472a9be08f78551fa2190c1a07d7d3
• https://git.kernel.org/stable/c/e5b5948c769aa1ebf962dddfb972f87d8f166f95
• https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html