Author: pfg
Date: Mon Jan 11 19:25:43 2016
New Revision: 293683
URL: https://svnweb.freebsd.org/changeset/base/293683
Log:
ext4: mount panic from freeing invalid pointers
Initialize the struct with those fields to zeroes on allocation,
preventing the panic.
Patch by: Damjan Jovanovic.
PR: 206056
MFC after: 3 days
Modified:
head/sys/fs/ext2fs/ext2_vfsops.c
Modified: head/sys/fs/ext2fs/ext2_vfsops.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_vfsops.c Mon Jan 11 19:22:58 2016
(r293682)
+++ head/sys/fs/ext2fs/ext2_vfsops.c Mon Jan 11 19:25:43 2016
(r293683)
@@ -590,7 +590,7 @@ ext2_mountfs(struct vnode *devvp, struct
* while Linux keeps the super block in a locked buffer.
*/
ump->um_e2fs = malloc(sizeof(struct m_ext2fs),
- M_EXT2MNT, M_WAITOK);
+ M_EXT2MNT, M_WAITOK | M_ZERO);
ump->um_e2fs->e2fs = malloc(sizeof(struct ext2fs),
M_EXT2MNT, M_WAITOK);
mtx_init(EXT2_MTX(ump), "EXT2FS", "EXT2FS Lock", MTX_DEF);
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