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author | Vincent Bernat <vincent@bernat.im> | 2015-08-15 15:49:13 +0200 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-08-23 03:35:02 +0200 |
commit | 999b8b88c6060adf7a9b7907740ae86ace65291e (patch) | |
tree | b8d0860768745926227e32002bdd5c249fdd4a86 /net/atm/mpc.c | |
parent | Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm (diff) | |
download | linux-999b8b88c6060adf7a9b7907740ae86ace65291e.tar.xz linux-999b8b88c6060adf7a9b7907740ae86ace65291e.zip |
9p: ensure err is initialized to 0 in p9_client_read/write
Some use of those functions were providing unitialized values to those
functions. Notably, when reading 0 bytes from an empty file on a 9P
filesystem, the return code of read() was not 0.
Tested with this simple program:
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
int main(int argc, const char **argv)
{
assert(argc == 2);
char buffer[256];
int fd = open(argv[1], O_RDONLY|O_NOCTTY);
assert(fd >= 0);
assert(read(fd, buffer, 0) == 0);
return 0;
}
Cc: stable@vger.kernel.org # v4.1
Signed-off-by: Vincent Bernat <vincent@bernat.im>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net/atm/mpc.c')
0 files changed, 0 insertions, 0 deletions