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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-10-14 21:05:33 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2014-10-14 21:05:33 +0530 |
| commit | fda389c8f0311dd5786be91a7b54b9f935fcafa1 (patch) | |
| tree | ed86d5f6c8477676fd64feb3b1bab447b8273ee0 | |
| parent | fcb32af153a745414b0d949e707c9485ab77d6ba (diff) | |
| download | glibc-fda389c8f0311dd5786be91a7b54b9f935fcafa1.tar glibc-fda389c8f0311dd5786be91a7b54b9f935fcafa1.tar.gz glibc-fda389c8f0311dd5786be91a7b54b9f935fcafa1.tar.bz2 glibc-fda389c8f0311dd5786be91a7b54b9f935fcafa1.zip | |
Fix infinite loop in check_pf (BZ #12926)
The recvmsg could return 0 under some conditions and cause the
make_request function to be stuck in an infinite loop.
Thank you Jim King <jim.king@simplivity.com> for posting Paul's patch
on the list.
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/check_pf.c | 2 |
3 files changed, 8 insertions, 2 deletions
@@ -1,3 +1,9 @@ +2014-10-14 Paul Pluzhnikov <ppluzhnikov@google.com> + + [BZ #12926] + * sysdeps/unix/sysv/linux/check_pf.c (make_request): Avoid + infinite loop when __recvmsg returns 0. + 2014-10-10 Joseph Myers <joseph@codesourcery.com> * CANCEL-FCT-WAIVE: Remove file. @@ -9,7 +9,7 @@ Version 2.21 * The following bugs are resolved with this release: - 6652, 14171, 17266, 17363, 17370, 17371, 17411, 17460. + 6652, 12926, 14171, 17266, 17363, 17370, 17371, 17411, 17460. Version 2.20 diff --git a/sysdeps/unix/sysv/linux/check_pf.c b/sysdeps/unix/sysv/linux/check_pf.c index c7fd9b0376..976f249e20 100644 --- a/sysdeps/unix/sysv/linux/check_pf.c +++ b/sysdeps/unix/sysv/linux/check_pf.c @@ -180,7 +180,7 @@ make_request (int fd, pid_t pid) }; ssize_t read_len = TEMP_FAILURE_RETRY (__recvmsg (fd, &msg, 0)); - if (read_len < 0) + if (read_len <= 0) goto out_fail2; if (msg.msg_flags & MSG_TRUNC) |