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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| @@ -1929,11 +1929,11 @@ static inline void rseq_migrate(struct task_struct *t) · 1928 unmodified lines | |||
| 1929 | 1929 | ||
| 1930 | /* | 1930 | /* |
| 1931 | * If parent process has a registered restartable sequences area, the | 1931 | * If parent process has a registered restartable sequences area, the |
| 1932 | * child inherits. Only applies when forking a process, not a thread. | 1932 | * child inherits. Unregister rseq for a clone with CLONE_VM set. |
| 1933 | */ | 1933 | */ |
| 1934 | static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags) | 1934 | static inline void rseq_fork(struct task_struct *t, unsigned long clone_flags) |
| 1935 | { | 1935 | { |
| 1936 | if (clone_flags & CLONE_THREAD) { | 1936 | if (clone_flags & CLONE_VM) { |
| 1937 | t->rseq = NULL; | 1937 | t->rseq = NULL; |
| 1938 | t->rseq_sig = 0; | 1938 | t->rseq_sig = 0; |
| 1939 | t->rseq_event_mask = 0; | 1939 | t->rseq_event_mask = 0; |