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utimes: Clamp the timestamps in notify_change()

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commit eb31e2f63d85d1bec4f7b136f317e03c03db5503 upstream.

Push clamping timestamps into notify_change(), so in-kernel
callers like nfsd and overlayfs will get similar timestamp
set behavior as utimes.

AV: get rid of clamping in ->setattr() instances; we don't need
to bother with that there, with notify_change() doing normalization
in all cases now (it already did for implicit case, since current_time()
clamps).

Suggested-by: Miklos Szeredi <[email protected]>
Fixes: 42e729b9dd ("utimes: Clamp the timestamps before update")
Cc: [email protected] # v5.4
Cc: Deepa Dinamani <[email protected]>
Cc: Jeff Layton <[email protected]>
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Al Viro <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Amir Goldstein 2019-11-24 21:31:45 +02:00 • committed by Greg Kroah-Hartman
commit cb33e477a5
6 changed files with 34 additions and 56 deletions
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4
fs/utimes.c
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@ -36,14 +36,14 @@ static int utimes_common(const struct path *path, struct timespec64 *times)
if (times[0].tv_nsec == UTIME_OMIT)
newattrs.ia_valid &= ~ATTR_ATIME;
else if (times[0].tv_nsec != UTIME_NOW) {
newattrs.ia_atime = timestamp_truncate(times[0], inode);
newattrs.ia_atime = times[0];
newattrs.ia_valid |= ATTR_ATIME_SET;
}
if (times[1].tv_nsec == UTIME_OMIT)
newattrs.ia_valid &= ~ATTR_MTIME;
else if (times[1].tv_nsec != UTIME_NOW) {
newattrs.ia_mtime = timestamp_truncate(times[1], inode);
newattrs.ia_mtime = times[1];
newattrs.ia_valid |= ATTR_MTIME_SET;
}
/*