[PATCH 5.10] module: treat exit sections the same as init sections when !CONFIG_MODULE_UNLOAD
Hi,
this mainline patch 33121347fb1c359bd6e3e680b9f2c6ced5734a8 should be applied to 5.15 as well. Without loading of some modules fails, if 1. MODULE_UNLOAD=n 2. Architecture is aarch64 (maybe others as well) 3. KASLR is active
Without this patch the symbol .exit.text is not relocated and when the linker generated a relative 32 bit relocation(PREL32) and the module is loaded far enough away from the default loading address, it will trigger a relocation overflow like this:
module algif_hash: overflow in relocation type 261 val ffff800010051c20
This happens to all modules, that use BUG in the exit section or if the compiler generates a jump table in the exit section.
Thanks, Joerg
On Mon, May 23, 2022 at 06:39:48AM +0200, Joerg Vehlow wrote:
Hi,
this mainline patch 33121347fb1c359bd6e3e680b9f2c6ced5734a8 should be applied to 5.15 as well.
You mean 5.10, right? It's already in 5.13 and newer releases
Without loading of some modules fails, if
- MODULE_UNLOAD=n
- Architecture is aarch64 (maybe others as well)
- KASLR is active
Without this patch the symbol .exit.text is not relocated and when the linker generated a relative 32 bit relocation(PREL32) and the module is loaded far enough away from the default loading address, it will trigger a relocation overflow like this:
module algif_hash: overflow in relocation type 261 val ffff800010051c20
This happens to all modules, that use BUG in the exit section or if the compiler generates a jump table in the exit section.
Now queued up for 5.10.y, thanks.
greg k-h
Hi Greg,
Am 5/23/2022 um 5:15 PM schrieb Greg KH:
On Mon, May 23, 2022 at 06:39:48AM +0200, Joerg Vehlow wrote:
Hi,
this mainline patch 33121347fb1c359bd6e3e680b9f2c6ced5734a8 should be applied to 5.15 as well.
You mean 5.10, right? It's already in 5.13 and newer releases
Yes of course, I even put it correct in the subject...
Without loading of some modules fails, if
- MODULE_UNLOAD=n
- Architecture is aarch64 (maybe others as well)
- KASLR is active
Without this patch the symbol .exit.text is not relocated and when the linker generated a relative 32 bit relocation(PREL32) and the module is loaded far enough away from the default loading address, it will trigger a relocation overflow like this:
module algif_hash: overflow in relocation type 261 val ffff800010051c20
This happens to all modules, that use BUG in the exit section or if the compiler generates a jump table in the exit section.
Now queued up for 5.10.y, thanks.
Thanks
greg k-h
Joerg
linux-stable-mirror@lists.linaro.org
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Greg KH -
Joerg Vehlow