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execve.2: Changes to the "dumpable" flag may change ownership of /proc/PID files 

Reported-by: Eric Hopper <hopper@omnifarious.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2020-04-21 13:10:06 +02:00
parent 279aae0369
commit bf85b5e63a
1 changed files with 8 additions and 2 deletions
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10
man2/execve.2
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@ -210,8 +210,7 @@ The following Linux-specific process attributes are also
not preserved during an
.BR execve ():
.IP * 3
The process's dumpable
flag is set to the value 1,
The process's "dumpable" attribute is set to the value 1,
unless a set-user-ID program, a set-group-ID program,
or a program with capabilities is being executed,
in which case the dumpable flag may instead be reset to the value in
@ -220,6 +219,13 @@ in the circumstances described under
.BR PR_SET_DUMPABLE
in
.BR prctl (2).
Note that changes to the "dumpable" attribute may cause ownership
of files in the process's
.IR /proc/[pid]
directory to change to
.IR root:root ,
as described in
.BR proc (5).
.IP *
The
.BR prctl (2)