Description
In the Linux kernel, the following vulnerability has been resolved: tick/broadcast: Move per CPU pointer access into the atomic section The recent fix for making the take over of the broadcast timer more reliable retrieves a per CPU pointer in preemptible context. This went unnoticed as compilers hoist the access into the non-preemptible region where the pointer is actually used. But of course it's valid that the compiler keeps it at the place where the code puts it which rightfully triggers: BUG: using smp_processor_id() in preemptible [00000000] code: caller is hotplug_cpu__broadcast_tick_pull+0x1c/0xc0 Move it to the actual usage site which is in a non-preemptible region.
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
dfe19aa91378972f10530635ad83b2d77f481044 to < f54abf332a2bc0413cfa8bd6a8511f7aa99faea0affected457a1c87d454455d671a3045cf0b56157be110a1 to < f91fb47ecacc178a83a77eeebd25cbaec18c01d6affected9ef7190228145f959d9bc0ddca40ecf76bb413b0 to < 668c6c4a7e9e9f081c06b70f30104fb7013437edaffectedd3b165c10473aa6fc6141bb5b1f6e5b50c1fb774 to < 541a900d245536d4809cb1aa322c3fcc2cdb58a6affected408bfb6b0a7f22e971ce6b600aec448769e580a8 to < 7b3ec186ba93e333e9efe7254e7e31c1828e5d2daffected3a58c590f6bd1d20eb1e76c5cea31c36cc032339 to < b9d604933d5fd72dd37f24e1dc35f778297d745aaffected2cdab4b4bf77369961f706cdeb7d040db10c5217 to < 7dd12f85f150010ef7518201c63fa7e395f5c3e9affectedf7d43dd206e7e18c182f200e67a8db8c209907fa to < 6881e75237a84093d0986f56223db3724619f26eaffected
Linux Linux
Default version status: unaffected
6.1.103 to < 6.1.105affected6.6.44 to < 6.6.46affected6.10.3 to < 6.10.5affected
References
- https://git.kernel.org/stable/c/f54abf332a2bc0413cfa8bd6a8511f7aa99faea0 ↗
- https://git.kernel.org/stable/c/f91fb47ecacc178a83a77eeebd25cbaec18c01d6 ↗
- https://git.kernel.org/stable/c/668c6c4a7e9e9f081c06b70f30104fb7013437ed ↗
- https://git.kernel.org/stable/c/541a900d245536d4809cb1aa322c3fcc2cdb58a6 ↗
- https://git.kernel.org/stable/c/7b3ec186ba93e333e9efe7254e7e31c1828e5d2d ↗
- https://git.kernel.org/stable/c/b9d604933d5fd72dd37f24e1dc35f778297d745a ↗
- https://git.kernel.org/stable/c/7dd12f85f150010ef7518201c63fa7e395f5c3e9 ↗
- https://git.kernel.org/stable/c/6881e75237a84093d0986f56223db3724619f26e ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗
- https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html ↗