fs/ntfs3: avoid calling run_get_entry() when run == NULL in ntfs_read_run_nb_ra()

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[ Upstream commit c5226b96c0 ]

When ntfs_read_run_nb_ra() is invoked with run == NULL the code later
assumes run is valid and may call run_get_entry(NULL, ...), and also
uses clen/idx without initializing them. Smatch reported uninitialized
variable warnings and this can lead to undefined behaviour. This patch
fixes it.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202512230646.v5hrYXL0-lkp@intel.com/
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Konstantin Komarov 2026-02-09 16:07:32 +01:00 • committed by Sasha Levin

parent 9b877e5e1c

commit 39aef9080f

1 changed files with 6 additions and 0 deletions

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fs/ntfs3/fsntfs.c

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