exfat: fix soft lockup in exfat_clear_bitmap

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[ Upstream commit 9da33619e0 ]

bitmap clear loop will take long time in __exfat_free_cluster()
if data size of file/dir enty is invalid.
If cluster bit in bitmap is already clear, stop clearing bitmap go to
out of loop.

Fixes: 31023864e6 ("exfat: add fat entry operations")
Reported-by: Kun Hu <huk23@m.fudan.edu.cn>, Jiaji Qin <jjtan24@m.fudan.edu.cn>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Namjae Jeon 2025-01-31 12:55:55 +09:00 • committed by Greg Kroah-Hartman

parent 6d099f3f7b

commit 413e908f13

3 changed files with 16 additions and 7 deletions

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10

fs/exfat/balloc.c

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2

fs/exfat/exfat_fs.h

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11

fs/exfat/fatent.c

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