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ext4: protect pa->pa_free in ext4_discard_allocated_blocks
authorKemeng Shi <shikemeng@huaweicloud.com>
Fri, 3 Mar 2023 17:21:06 +0000 (01:21 +0800)
committerTheodore Ts'o <tytso@mit.edu>
Thu, 6 Apr 2023 05:13:11 +0000 (01:13 -0400)
commit36cb0f52aeb929b141f3f580481eb04c65b6e2b9
treec67c461a33802214283d16fccdc4ad2250ff75b3tree | snapshot
parent1afdc5889427110c8466da2b23360a27be711ff0commit | diff
ext4: protect pa->pa_free in ext4_discard_allocated_blocks

If ext4_mb_mark_diskspace_used fails in ext4_mb_new_blocks, we may
discard pa already in list. Protect pa with pa_lock to avoid race.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://lore.kernel.org/r/20230303172120.3800725-7-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
fs/ext4/mballoc.c diff | blob | history
Domain: System / Kernel;