https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=237368
Bug ID: 237368
Summary: /bin/df ; df on more than one unmounted device
coredumps
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: b...@freebsd.org
Reporter: ja...@catflap.org
I realise "df on unmountd devices is deprecated", but even so, as it stands,
there appears to be an invalid free, which causes coredump.
/usr/src/bin/df/df.c:
Line 276 and 277:
if (iov != NULL)
free_iovec(&iov, &iovlen);
This is called prior to building the mount structure for nmount. If the
structure has been used before, it tries to free it, but causes a coredump in
the process.
To reproduce, run df on 2 or more unmounted devices (you don't actually need a
real unmounted device to trigger the bug, simply doing "df /dev/*" will trigger
the above codepath.
[ I tagged this "current" because it still occurs in current, but it's in
12-stable too ]
cheers, Jamie
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