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MFC r293683:

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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
This commit is contained in:
pfg 2016-01-14 01:50:06 +00:00
parent e37f0a84b3
commit 407b5ea098
1 changed files with 1 additions and 1 deletions
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2
sys/fs/ext2fs/ext2_vfsops.c
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@ -590,7 +590,7 @@ ext2_mountfs(struct vnode *devvp, struct mount *mp)
* 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);