https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=a4584410fc24486eae272c6e6a582eb27757314c
commit a4584410fc24486eae272c6e6a582eb27757314c Author: Corinna Vinschen <[email protected]> AuthorDate: Tue Jan 10 11:45:28 2023 +0100 Commit: Corinna Vinschen <[email protected]> CommitDate: Tue Jan 10 11:49:08 2023 +0100 Cygwin: /proc/<PID>/status: avoid crash computing signal info The code computing the mask of pending signals used the per-queued signal TLS pointer without checking it for NULL. Fix this by using the process-wide signal mask in that case. Fixes: 195169186bfd5 ("Cygwin: wait_sig: allow to compute process-wide mask of pending signals") Signed-off-by: Corinna Vinschen <[email protected]> Diff: --- winsup/cygwin/release/3.4.4 | 3 +++ winsup/cygwin/sigproc.cc | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/winsup/cygwin/release/3.4.4 b/winsup/cygwin/release/3.4.4 index a653b08a1a40..35d746ba08fd 100644 --- a/winsup/cygwin/release/3.4.4 +++ b/winsup/cygwin/release/3.4.4 @@ -10,3 +10,6 @@ Bug Fixes - Reinstantiate exporting _alloca. Addresses: https://cygwin.com/pipermail/cygwin/2023-January/252797.html + +- Avoid hangs when reading /proc/<PID>/status. + Addresses: https://cygwin.com/pipermail/cygwin/2022-December/252756.html diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc index a99876dc9fb9..fd3291c1bcfe 100644 --- a/winsup/cygwin/sigproc.cc +++ b/winsup/cygwin/sigproc.cc @@ -1382,7 +1382,8 @@ wait_sig (VOID *) *pack.mask = 0; while ((q = q->next)) { - if (q->sigtls->sigmask & (bit = SIGTOMASK (q->si.si_signo))) + _cygtls *sigtls = q->sigtls ?: _main_tls; + if (sigtls->sigmask & (bit = SIGTOMASK (q->si.si_signo))) { tl_entry = cygheap->find_tls (q->si.si_signo, issig_wait); if (tl_entry)
