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| author | Lukas Larsson <[email protected]> | 2018-12-21 11:58:08 +0100 |
|---|---|---|
| committer | Lukas Larsson <[email protected]> | 2018-12-21 11:58:08 +0100 |
| commit | 55bf32b64e1a4bbed588544077a109fc07e1f02d (patch) | |
| tree | 005d54c398933018caf37df69313602cd2bb8bf7 /erts/emulator/drivers/common | |
| parent | 58dcd66ac638b1d6355662f0fb364001013769f4 (diff) | |
| parent | f9dab18e922c00e51b945da2052cd513d3cd39df (diff) | |
| download | otp-55bf32b64e1a4bbed588544077a109fc07e1f02d.tar.gz otp-55bf32b64e1a4bbed588544077a109fc07e1f02d.tar.bz2 otp-55bf32b64e1a4bbed588544077a109fc07e1f02d.zip | |
Merge branch 'lukas/erts/inet_pktopts_old_linux/OTP-15494' into maint
* lukas/erts/inet_pktopts_old_linux/OTP-15494:
erts: Fix inet pktopts on very old linux kernels
Diffstat (limited to 'erts/emulator/drivers/common')
| -rw-r--r-- | erts/emulator/drivers/common/inet_drv.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c index 47eb5df7dd..b44464d6da 100644 --- a/erts/emulator/drivers/common/inet_drv.c +++ b/erts/emulator/drivers/common/inet_drv.c @@ -634,9 +634,13 @@ static size_t my_strnlen(const char *s, size_t maxlen) * header length. To get the header length we use * the pointer difference from the cmsg start pointer * to the CMSG_DATA(cmsg) pointer. + * + * Some platforms (seen on ppc Linux 2.6.29-3.ydl61.3) + * may return 0 as the cmsg_len if the cmsg is to be ignored. */ #define LEN_CMSG_DATA(cmsg) \ - ((cmsg)->cmsg_len - ((char*)CMSG_DATA(cmsg) - (char*)(cmsg))) + ((cmsg)->cmsg_len < sizeof (struct cmsghdr) ? 0 : \ + (cmsg)->cmsg_len - ((char*)CMSG_DATA(cmsg) - (char*)(cmsg))) #define NXT_CMSG_HDR(cmsg) \ ((struct cmsghdr*)(((char*)(cmsg)) + CMSG_SPACE(LEN_CMSG_DATA(cmsg)))) #endif |