https://github.com/torvalds/linux
Commit 221af7f87b9 ("Split 'flush_old_exec' into two functions") split the function at the point of no return - ie right where there were no more error cases to check. That made sense from a technical standpoint, but when we then also combined it with the actual personality setting going in between flush_old_exec() and setup_new_exec(), it needs to be a bit more careful. In particular, we need to make sure that we really flush the old personality bits in the 'flush' stage, rather than later in the 'setup' stage, since otherwise we might be flushing the _new_ personality state that we're just setting up. So this moves the flags and personality flushing (and 'flush_thread()', which is the arch-specific function that generally resets lazy FP state etc) of the old process into flush_old_exec(), so that it doesn't affect any state that execve() is setting up for the new process environment. This was reported by Michal Simek as breaking his Microblaze qemu environment. Reported-and-tested-by: Michal Simek <michal.simek@petalogix.com> Cc: Peter Anvin <hpa@zytor.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix 'flush_old_exec()/setup_new_exec()' split
File | Mode | Size |
---|---|---|
integrity | ||
keys | ||
selinux | ||
smack | ||
tomoyo | ||
Kconfig | -rw-r--r-- | 6.2 KB |
Makefile | -rw-r--r-- | 835 bytes |
capability.c | -rw-r--r-- | 24.5 KB |
commoncap.c | -rw-r--r-- | 26.3 KB |
device_cgroup.c | -rw-r--r-- | 11.7 KB |
inode.c | -rw-r--r-- | 8.7 KB |
lsm_audit.c | -rw-r--r-- | 8.7 KB |
min_addr.c | -rw-r--r-- | 1.3 KB |
security.c | -rw-r--r-- | 33.5 KB |
Computing file changes ...