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ext4: update 'state->fc_regions_size' after successful memory allocation

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commit 27cd497803 upstream.

To avoid to 'state->fc_regions_size' mismatch with 'state->fc_regions'
when fail to reallocate 'fc_reqions',only update 'state->fc_regions_size'
after 'state->fc_regions' is allocated successfully.

Cc: stable@kernel.org
Signed-off-by: Ye Bin <yebin10@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220921064040.3693255-4-yebin10@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ye Bin 2022-09-21 14:40:40 +08:00 committed by Greg Kroah-Hartman
parent 2cfb769d60
commit 2189756eab
1 changed files with 5 additions and 4 deletions
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9
fs/ext4/fast_commit.c
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@ -1586,14 +1586,15 @@ int ext4_fc_record_regions(struct super_block *sb, int ino,
if (state->fc_regions_used == state->fc_regions_size) { if (state->fc_regions_used == state->fc_regions_size) {
struct ext4_fc_alloc_region *fc_regions; struct ext4_fc_alloc_region *fc_regions;
state->fc_regions_size +=
EXT4_FC_REPLAY_REALLOC_INCREMENT;
fc_regions = krealloc(state->fc_regions, fc_regions = krealloc(state->fc_regions,
state->fc_regions_size * sizeof(struct ext4_fc_alloc_region) *
sizeof(struct ext4_fc_alloc_region), (state->fc_regions_size +
EXT4_FC_REPLAY_REALLOC_INCREMENT),
GFP_KERNEL); GFP_KERNEL);
if (!fc_regions) if (!fc_regions)
return -ENOMEM; return -ENOMEM;
state->fc_regions_size +=
EXT4_FC_REPLAY_REALLOC_INCREMENT;
state->fc_regions = fc_regions; state->fc_regions = fc_regions;
} }
region = &state->fc_regions[state->fc_regions_used++]; region = &state->fc_regions[state->fc_regions_used++];