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| author | Paul Eggert <eggert@cs.ucla.edu> | 2021-11-09 10:11:42 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2021-11-09 10:12:23 -0800 |
| commit | b3a85a1a8a816f4f6f9c01399c16efe92a86ca06 (patch) | |
| tree | eeb0f2c52009e1d6368314c54c0c941cadae2030 /src | |
| parent | c562691787709e5ebfec9f298f8d702efe8291b7 (diff) | |
| download | grep-b3a85a1a8a816f4f6f9c01399c16efe92a86ca06.tar.gz | |
grep: work around PCRE bug
Problem reported by Carlo Marcelo Arenas Belón (Bug#51710).
* src/pcresearch.c (jit_exec): Don’t attempt to grow the JIT stack
over INT_MAX - 8 * 1024.
Diffstat (limited to 'src')
| -rw-r--r-- | src/pcresearch.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/pcresearch.c b/src/pcresearch.c index 3bdaee90..09f92c85 100644 --- a/src/pcresearch.c +++ b/src/pcresearch.c @@ -72,8 +72,11 @@ jit_exec (struct pcre_comp *pc, char const *subject, int search_bytes, search_offset, options, sub, NSUB); #if PCRE_STUDY_JIT_COMPILE + /* Going over this would trigger an int overflow bug within PCRE. */ + int jitstack_max = INT_MAX - 8 * 1024; + if (e == PCRE_ERROR_JIT_STACKLIMIT - && 0 < pc->jit_stack_size && pc->jit_stack_size <= INT_MAX / 2) + && 0 < pc->jit_stack_size && pc->jit_stack_size <= jitstack_max / 2) { int old_size = pc->jit_stack_size; int new_size = pc->jit_stack_size = old_size * 2; |