diff options
| author | Al Viro <[email protected]> | 2017-02-19 07:15:27 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2017-02-19 09:54:31 -0800 |
| commit | 137d01df511b3afe1f05499aea05f3bafc0fb221 (patch) | |
| tree | afb1bebd5515d5a1642bb9afb6adcd23d0fd6e6d /lib/pm-notifier-error-inject.c | |
| parent | fd3fc0b4d7305fa7246622dcc0dec69c42443f45 (diff) | |
Fix missing sanity check in /dev/sg
What happens is that a write to /dev/sg is given a request with non-zero
->iovec_count combined with zero ->dxfer_len. Or with ->dxferp pointing
to an array full of empty iovecs.
Having write permission to /dev/sg shouldn't be equivalent to the
ability to trigger BUG_ON() while holding spinlocks...
Found by Dmitry Vyukov and syzkaller.
[ The BUG_ON() got changed to a WARN_ON_ONCE(), but this fixes the
underlying issue. - Linus ]
Signed-off-by: Al Viro <[email protected]>
Reported-by: Dmitry Vyukov <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Cc: [email protected]
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/pm-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions