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alistair23-linux/fs/jbd2
Vasily Averin b19f130269 jbd2_seq_info_next should increase position index
commit 1a8e9cf40c upstream.

if seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output.

Script below generates endless output
 $ q=;while read -r r;do echo "$((++q)) $r";done </proc/fs/jbd2/DEV/info

https://bugzilla.kernel.org/show_bug.cgi?id=206283

Fixes: 1f4aace60b ("fs/seq_file.c: simplify seq_file iteration code and interface")
Cc: stable@kernel.org
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/d13805e5-695e-8ac3-b678-26ca2313629f@virtuozzo.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-11 04:35:32 -08:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
checkpoint.c jbd2: remove repeated assignments in __jbd2_log_wait_for_space() 2019-04-06 18:14:17 -04:00
commit.c jbd2: Fix statistics for the number of logged blocks 2020-01-04 19:17:14 +01:00
journal.c jbd2_seq_info_next should increase position index 2020-02-11 04:35:32 -08:00
recovery.c jbd2: clarify bad journal block checksum message 2018-02-18 21:33:13 -05:00
revoke.c jbd2: flush_descriptor(): Do not decrease buffer head's ref count 2019-08-11 16:29:41 -04:00
transaction.c jbd2: remove jbd2_journal_inode_add_[write|wait] 2019-09-24 15:54:07 -07:00