Pull rseq fixes from Ingo Molnar: "Two rseq bugfixes: - CLONE_VM !CLONE_THREAD didn't work properly, the kernel would end up corrupting the TLS of the parent. Technically a change in the ABI but the previous behavior couldn't resonably have been relied on by applications so this looks like a valid exception to the ABI rule. - Make the RSEQ_FLAG_UNREGISTER ABI behavior consistent with the handling of other flags. This is not thought to impact any applications either" * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: rseq: Unregister rseq for clone CLONE_VM rseq: Reject unknown flags on rseq unregister
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| @@ -310,6 +310,8 @@ SYSCALL_DEFINE4(rseq, struct rseq __user *, rseq, u32, rseq_len, · 309 unmodified lines | |||
| 310 | int ret; | 310 | int ret; |
| 311 | 311 | ||
| 312 | if (flags & RSEQ_FLAG_UNREGISTER) { | 312 | if (flags & RSEQ_FLAG_UNREGISTER) { |
| 313 | if (flags & ~RSEQ_FLAG_UNREGISTER) | ||
| 314 | return -EINVAL; | ||
| 313 | /* Unregister rseq for current thread. */ | 315 | /* Unregister rseq for current thread. */ |
| 314 | if (current->rseq != rseq || !current->rseq) | 316 | if (current->rseq != rseq || !current->rseq) |
| 315 | return -EINVAL; | 317 | return -EINVAL; |