gfs2: clean up iopen glock mess in gfs2_create_inode

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Before this patch, gfs2_create_inode had a use-after-free for the
iopen glock in some error paths because it did this:

	gfs2_glock_put(io_gl);
fail_gunlock2:
	if (io_gl)
		clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);

In some cases, the io_gl was used for create and only had one
reference, so the glock might be freed before the clear_bit().
This patch tries to straighten it out by only jumping to the
error paths where iopen is properly set, and moving the
gfs2_glock_put after the clear_bit.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

...

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Bob Peterson 2019-11-19 11:40:46 -05:00 • committed by Andreas Gruenbacher

parent d99724c3c3

commit 2c47c1be51

1 changed files with 7 additions and 6 deletions

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fs/gfs2/inode.c

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