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| author | Mark Wielaard <mark@klomp.org> | 2021-12-17 23:51:35 +0100 |
|---|---|---|
| committer | Mark Wielaard <mark@klomp.org> | 2021-12-18 02:23:44 +0100 |
| commit | cdf407ef36378ba623c97f9c5c454666f45771fd (patch) | |
| tree | 6a452ee7954503bdd9e533da66912d78fac5b72e /libdwfl | |
| parent | ee99a6ec16f52fc31f322f7ec1abfedf400a09fa (diff) | |
| download | elfutils-cdf407ef36378ba623c97f9c5c454666f45771fd.tar.gz | |
libdwfl: Make sure there is at least one phdr
The buffer read in needs to contain room for at least one Phdr.
Signed-off-by: Mark Wielaard <mark@klomp.org>
Diffstat (limited to 'libdwfl')
| -rw-r--r-- | libdwfl/ChangeLog | 4 | ||||
| -rw-r--r-- | libdwfl/link_map.c | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/libdwfl/ChangeLog b/libdwfl/ChangeLog index d4eee639..8760b1ef 100644 --- a/libdwfl/ChangeLog +++ b/libdwfl/ChangeLog @@ -1,5 +1,9 @@ 2021-12-16 Mark Wielaard <mark@klomp.org> + * link_map.c (dwfl_link_map_report): Make sure phnum is non-zero. + +2021-12-16 Mark Wielaard <mark@klomp.org> + * link_map.c (dwfl_link_map_report): Make sure dyn_filesz / entsize is non-zero. diff --git a/libdwfl/link_map.c b/libdwfl/link_map.c index 177ad9a5..c4f79f11 100644 --- a/libdwfl/link_map.c +++ b/libdwfl/link_map.c @@ -890,6 +890,11 @@ dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t auxv_size, { nbytes = in.d_size; phnum = nbytes / phent; + if (phnum == 0) + { + __libdwfl_seterrno (DWFL_E_BADELF); + return false; + } } void *buf = malloc (nbytes); Elf32_Phdr (*p32)[phnum] = buf; |