Christophe Leroy wrote:
Le 06/01/2022 à 12:45, Naveen N. Rao a écrit :
task_pt_regs() can return NULL on powerpc for kernel threads. This is
then used in __bpf_get_stack() to check for user mode, resulting in a
kernel oops. Guard against this by checking return value of
task_pt_regs() before
Le 06/01/2022 à 12:45, Naveen N. Rao a écrit :
> task_pt_regs() can return NULL on powerpc for kernel threads. This is
> then used in __bpf_get_stack() to check for user mode, resulting in a
> kernel oops. Guard against this by checking return value of
> task_pt_regs() before trying to obtain
On 1/6/22 12:45 PM, Naveen N. Rao wrote:
task_pt_regs() can return NULL on powerpc for kernel threads. This is
then used in __bpf_get_stack() to check for user mode, resulting in a
kernel oops. Guard against this by checking return value of
task_pt_regs() before trying to obtain the call chain.
task_pt_regs() can return NULL on powerpc for kernel threads. This is
then used in __bpf_get_stack() to check for user mode, resulting in a
kernel oops. Guard against this by checking return value of
task_pt_regs() before trying to obtain the call chain.
Fixes: fa28dcb82a38f8 ("bpf: Introduce
