jbd2: make jbd2_handle_buffer_credits() handle reserved handles

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The helper jbd2_handle_buffer_credits() doesn't correctly handle reserved
handles which can lead to crashes. Fix it getting of journal pointer to
work for reserved handles as well.

Fixes: a9a8344ee1 ("ext4, jbd2: Provide accessor function for handle credits")
Reported-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191115102210.29445-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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Jan Kara 2019-11-15 11:22:10 +01:00 • committed by Theodore Ts'o

parent 565333a155

commit 3c845acd02

1 changed files with 6 additions and 2 deletions

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include/linux/jbd2.h

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