On 01/24, Gregory Price wrote: > > Adds PTRACE_O_SUSPEND_SYSCALL_USER_DISPATCH to ptrace options, and > modify Syscall User Dispatch to suspend interception when enabled. > > This is modeled after the SUSPEND_SECCOMP feature, which suspends > SECCOMP interposition. Without doing this, software like CRIU will > inject system calls into a process and be intercepted by Syscall > User Dispatch, either causing a crash (due to blocked signals) or > the delivery of those signals to a ptracer (not the intended behavior). Cough... Gregory, I am sorry ;) but can't we drop this patch to ? CRIU needs to do PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG and check config->mode anyway as we discussed. Then it can simply set *config->selector = SYSCALL_DISPATCH_FILTER_ALLOW with the same effect, no? Oleg.
