| commit | cf5eebae2cd28d37581507668605f4d23cd7218d | |
| author | Miklos Szeredi <mszeredi@redhat.com> | |
| Wed, 15 Nov 2017 10:34:58 +0000 (15 11:34 +0100) | ||
| committer | Al Viro <viro@zeniv.linux.org.uk> | |
| Sat, 20 Jan 2018 07:31:15 +0000 (20 02:31 -0500) | ||
| tree | 4eb7d05f8d94adf671ba5f8aa736b9f502e37d21 | treesnapshot (tar.gz zip) |
| parent | ba87977a49913129962af8ac35b0e13e0fa4382d | commitdiff |
seq_file: fix incomplete reset on read from zero offset
When resetting iterator on a zero offset we need to discard any data
already in the buffer (count), and private state of the iterator (version).
For example this bug results in first line being repeated in /proc/mounts
if doing a zero size read before a non-zero size read.
Reported-by: Rich Felker <dalias@libc.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: e522751d605d ("seq_file: reset iterator to first record for zero offset")
Cc: <stable@vger.kernel.org> # v4.10
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
When resetting iterator on a zero offset we need to discard any data
already in the buffer (count), and private state of the iterator (version).
For example this bug results in first line being repeated in /proc/mounts
if doing a zero size read before a non-zero size read.
Reported-by: Rich Felker <dalias@libc.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: e522751d605d ("seq_file: reset iterator to first record for zero offset")
Cc: <stable@vger.kernel.org> # v4.10
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| fs/seq_file.c | diffblobblamehistory |