| commit | b115bee4dd7c33ec719fe2fc566d41c0e2133c85 | |
| author | Rich Felker <dalias@aerifal.cx> | |
| Mon, 28 Sep 2020 23:32:34 +0000 (28 19:32 -0400) | ||
| committer | Rich Felker <dalias@aerifal.cx> | |
| Thu, 15 Oct 2020 00:27:12 +0000 (14 20:27 -0400) | ||
| tree | e958cb9537aa7e9e08706c035a5ad6306b33b4be | treesnapshot (tar.gz zip) |
| parent | 3cd3de61894b73ca9f62ab9e5b572fc1037dcd55 | commitdiff |
fix missing synchronization of fork with abort
if the multithreaded parent forked while another thread was calling
sigaction for SIGABRT or calling abort, the child could inherit a lock
state in which future calls to abort will deadlock, or in which the
disposition for SIGABRT has already been reset to SIG_DFL. this is
nonconforming since abort is AS-safe and permitted to be called
concurrently with fork or in the MT-forked child.
if the multithreaded parent forked while another thread was calling
sigaction for SIGABRT or calling abort, the child could inherit a lock
state in which future calls to abort will deadlock, or in which the
disposition for SIGABRT has already been reset to SIG_DFL. this is
nonconforming since abort is AS-safe and permitted to be called
concurrently with fork or in the MT-forked child.
| src/process/fork.c | diffblobblamehistory |