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| author | Andreas Schwab <schwab@suse.de> | 2020-01-20 17:01:50 +0100 |
|---|---|---|
| committer | Andreas Schwab <schwab@suse.de> | 2020-01-21 15:26:57 +0100 |
| commit | d93769405996dfc11d216ddbe415946617b5a494 (patch) | |
| tree | 495421ac18939903f2514d2d658b038fcdc26f31 /sysdeps/powerpc/powerpc64/backtrace.c | |
| parent | 8b222fa38700422b4da6731806835f0bbf40920d (diff) | |
| download | glibc-d93769405996dfc11d216ddbe415946617b5a494.zip glibc-d93769405996dfc11d216ddbe415946617b5a494.tar.gz glibc-d93769405996dfc11d216ddbe415946617b5a494.tar.bz2 | |
Fix array overflow in backtrace on PowerPC (bug 25423)
When unwinding through a signal frame the backtrace function on PowerPC
didn't check array bounds when storing the frame address. Fixes commit
d400dcac5e ("PowerPC: fix backtrace to handle signal trampolines").
Diffstat (limited to 'sysdeps/powerpc/powerpc64/backtrace.c')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/backtrace.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/backtrace.c b/sysdeps/powerpc/powerpc64/backtrace.c index 65c260a..8a53a10 100644 --- a/sysdeps/powerpc/powerpc64/backtrace.c +++ b/sysdeps/powerpc/powerpc64/backtrace.c @@ -87,6 +87,8 @@ __backtrace (void **array, int size) if (is_sigtramp_address (current->return_address)) { struct signal_frame_64 *sigframe = (struct signal_frame_64*) current; + if (count + 1 == size) + break; array[++count] = (void*) sigframe->uc.uc_mcontext.gp_regs[PT_NIP]; current = (void*) sigframe->uc.uc_mcontext.gp_regs[PT_R1]; } |