kernel/linux.git/fs/btrfs/ref-verify.c, branch v7.0.10

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

btrfs: ref-verify: fix IS_ERR() vs NULL check in btrfs_build_ref_tree()

2025-10-22T07:40:07+00:00

btrfs_extent_root()/btrfs_global_root() does not return error pointers, it returns NULL on error. Reported-by: Dan Carpenter Link: https://lore.kernel.org/all/aNJfvxj0anEnk9Dm@stanley.mountain/ Fixes : ed4e6b5d644c ("btrfs: ref-verify: handle damaged extent root tree") CC: stable@vger.kernel.org # 6.17+ Signed-off-by: Amit Dhingra Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: more trivial BTRFS_PATH_AUTO_FREE conversions

2025-09-23T06:49:26+00:00

Trivial pattern for the auto freeing with goto -> return conversions if possible. The following cases are considered trivial in this patch: 1. Cases where there are no operations between btrfs_free_path() and the function returns. 2. Cases where only simple cleanup operations (such as kfree(), kvfree(), clear_bit(), and fs_path_free()) are present between btrfs_free_path() and the function return. Signed-off-by: Sun YangKai Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: ref-verify: handle damaged extent root tree

2025-09-18T03:47:34+00:00

Syzbot hits a problem with enabled ref-verify, ignorebadroots and a fuzzed/damaged extent tree. There's no fallback option like in other places that can deal with it so disable the whole ref-verify as it is just a debugging feature. Reported-by: syzbot+9c3e0cdfbfe351b0bc0e@syzkaller.appspotmail.com Link: https://lore.kernel.org/all/0000000000001b6052062139be1c@google.com/ Reviewed-by: Qu Wenruo Signed-off-by: David Sterba

btrfs: constify more pointer parameters

2025-07-21T21:53:26+00:00

Another batch of pointer parameter constifications. This is for clarity and minor addition to type safety. There are no observable effects in the assembly code and .ko measured on release config. Signed-off-by: David Sterba

btrfs: use rb_find_add() in insert_ref_entry()

2025-07-21T21:53:25+00:00

Use the rb-tree helper so we don't open code the search and insert code. Signed-off-by: Yangtao Li Signed-off-by: Pan Chuang Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: use rb_find_add() in insert_root_entry()

2025-07-21T21:53:25+00:00

Use the rb-tree helper so we don't open code the search and insert code. Signed-off-by: Yangtao Li Signed-off-by: Pan Chuang Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: use rb_find() in lookup_root_entry()

2025-07-21T21:53:25+00:00

Use the rb-tree helper so we don't open code the search code. Signed-off-by: Yangtao Li Signed-off-by: Pan Chuang Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: use rb_find_add() in insert_block_entry()

2025-07-21T21:53:25+00:00

Use the rb-tree helper so we don't open code the search and insert code. Signed-off-by: Yangtao Li Signed-off-by: Pan Chuang Reviewed-by: David Sterba Signed-off-by: David Sterba

btrfs: use rb_find() in lookup_block_entry()

2025-07-21T21:53:25+00:00

Use the rb-tree helper so we don't open code the search code. Signed-off-by: Yangtao Li Signed-off-by: Pan Chuang Reviewed-by: David Sterba Signed-off-by: David Sterba