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Red Hat Bugzilla – Attachment 155566 Details for
Bug 236848
mount/fstab.c:lock_mtab() should open with proper permissions
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[patch]
Patch to fix mtab~ lock permission when CAP_DAC_OVERRIDE is revoked
util-linux-2.13-pre7-mtab-lock-perms.patch (text/plain), 913 bytes, created by
Flavio Leitner
on 2007-05-28 22:05:44 UTC
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Description:
Patch to fix mtab~ lock permission when CAP_DAC_OVERRIDE is revoked
Filename:
MIME Type:
Creator:
Flavio Leitner
Created:
2007-05-28 22:05:44 UTC
Size:
913 bytes
patch
obsolete
>[IT#116584] mount should set proper permissions on locktime > >When creating the "/etc/mtab~" lockfile (specifically 'linktargetfile' in the >lock_mtab function), the file is created with incorrect permissions ('000') >which necessitates root to leverage CAP_DAC_OVERRIDE. If proper file modes (it >would appear 0600 would be sufficient) were used in the open this would >function properly with CAP_DAC_OVERRIDE revoked. > > >Index: util-linux-2.13-pre7/mount/fstab.c >=================================================================== >--- util-linux-2.13-pre7.orig/mount/fstab.c >+++ util-linux-2.13-pre7/mount/fstab.c >@@ -486,7 +486,7 @@ lock_mtab (void) { > > sprintf(linktargetfile, MOUNTLOCK_LINKTARGET, getpid ()); > >- i = open (linktargetfile, O_WRONLY|O_CREAT, 0); >+ i = open (linktargetfile, O_WRONLY|O_CREAT, S_IRUSR|S_IWUSR); > if (i < 0) { > int errsv = errno; > /* linktargetfile does not exist (as a file)
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