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| author | Patrik Nyblom <[email protected]> | 2012-08-27 17:55:50 +0200 |
|---|---|---|
| committer | Patrik Nyblom <[email protected]> | 2012-08-30 16:55:53 +0200 |
| commit | cf6d1faf367b47c79ded23afc0d3fd3f38abfaea (patch) | |
| tree | 6d71721b74104d00ca61646a52a418e1753c6e4e /erts/emulator/drivers/common/efile_drv.c | |
| parent | da477e3fc1bcac8d8afb4d3eef6d250d4eae37e0 (diff) | |
| download | otp-cf6d1faf367b47c79ded23afc0d3fd3f38abfaea.tar.gz otp-cf6d1faf367b47c79ded23afc0d3fd3f38abfaea.tar.bz2 otp-cf6d1faf367b47c79ded23afc0d3fd3f38abfaea.zip | |
Teach VM not to dump core on long pathnames
Long input paths (longer than MAX_PATH) would get copied
into a buffer of size MAX_PATH for read_link and altname
in efile_drv.
Also fixed misuse of size_t parameter as wchar_t *
string length in win_efile:efile_readlink.
Diffstat (limited to 'erts/emulator/drivers/common/efile_drv.c')
| -rw-r--r-- | erts/emulator/drivers/common/efile_drv.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c index f24098025e..912f5d3d8b 100644 --- a/erts/emulator/drivers/common/efile_drv.c +++ b/erts/emulator/drivers/common/efile_drv.c @@ -206,6 +206,9 @@ dt_private *get_dt_private(int); # define KEY(desc) (&(desc)->key) #endif +#ifndef MAX +# define MAX(x, y) (((x) > (y)) ? (x) : (y)) +#endif #ifdef FILENAMES_16BIT #ifdef USE_VM_PROBES @@ -2848,8 +2851,9 @@ file_output(ErlDrvData e, char* buf, ErlDrvSizeT count) case FILE_READLINK: { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1); - + d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + + MAX(RESBUFSIZE, (FILENAME_BYTELEN(name) + + FILENAME_CHARSIZE)) + 1); FILENAME_COPY(d->b, name); #ifdef USE_VM_PROBES dt_s1 = d->b; @@ -2864,7 +2868,9 @@ file_output(ErlDrvData e, char* buf, ErlDrvSizeT count) case FILE_ALTNAME: { - d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + RESBUFSIZE + 1); + d = EF_SAFE_ALLOC(sizeof(struct t_data) - 1 + + MAX(RESBUFSIZE, (FILENAME_BYTELEN(name) + + FILENAME_CHARSIZE)) + 1); FILENAME_COPY(d->b, name); #ifdef USE_VM_PROBES dt_s1 = d->b; |