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Date: Fri, 29 Mar 2019 20:54:05 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Lukas Czerner <lczerner@...hat.com>, Theodore Ts'o <tytso@....edu>, Sasha Levin <sashal@...nel.org>, linux-ext4@...r.kernel.org Subject: [PATCH AUTOSEL 4.14 04/37] ext4: add missing brelse() in add_new_gdb_meta_bg() From: Lukas Czerner <lczerner@...hat.com> [ Upstream commit d64264d6218e6892edd832dc3a5a5857c2856c53 ] Currently in add_new_gdb_meta_bg() there is a missing brelse of gdb_bh in case ext4_journal_get_write_access() fails. Additionally kvfree() is missing in the same error path. Fix it by moving the ext4_journal_get_write_access() before the ext4 sb update as Ted suggested and release n_group_desc and gdb_bh in case it fails. Fixes: 61a9c11e5e7a ("ext4: add missing brelse() add_new_gdb_meta_bg()'s error path") Signed-off-by: Lukas Czerner <lczerner@...hat.com> Signed-off-by: Theodore Ts'o <tytso@....edu> Signed-off-by: Sasha Levin <sashal@...nel.org> --- fs/ext4/resize.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 6f0acfe31418..fb9fbf993e22 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -907,11 +907,18 @@ static int add_new_gdb_meta_bg(struct super_block *sb, memcpy(n_group_desc, o_group_desc, EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *)); n_group_desc[gdb_num] = gdb_bh; + + BUFFER_TRACE(gdb_bh, "get_write_access"); + err = ext4_journal_get_write_access(handle, gdb_bh); + if (err) { + kvfree(n_group_desc); + brelse(gdb_bh); + return err; + } + EXT4_SB(sb)->s_group_desc = n_group_desc; EXT4_SB(sb)->s_gdb_count++; kvfree(o_group_desc); - BUFFER_TRACE(gdb_bh, "get_write_access"); - err = ext4_journal_get_write_access(handle, gdb_bh); return err; } -- 2.19.1
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