Headline
CVE-2023-3111: fs: btrfs: fix a possible use-after-free bug caused by incorrect error handling in prepare_to_relocate()
A use after free vulnerability was found in prepare_to_relocate in fs/btrfs/relocation.c in btrfs in the Linux Kernel. This possible flaw can be triggered by calling btrfs_ioctl_balance() before calling btrfs_ioctl_defrag().
Message ID
[email protected] (mailing list archive)
State
New, archived
Headers
show
Series
fs: btrfs: fix a possible use-after-free bug caused by incorrect error handling in prepare_to_relocate() | expand
Commit Message****Comments
Patch
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index a6dc827e75af…342ade83d062 100644 — a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -3573,7 +3573,12 @@ int prepare_to_relocate(struct reloc_control *rc) */ return PTR_ERR(trans); } - return btrfs_commit_transaction(trans);
- ret = btrfs_commit_transaction(trans);
- if (ret)
unset\_reloc\_control(rc);- return ret; }
static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
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