https://github.com/torvalds/linux
Revision 877f919e192a09e77962a13d7165783027dee5fd authored by Chunyu Hu on 09 June 2018, 19:51:24 UTC, committed by Al Viro on 28 June 2018, 00:44:38 UTC
kmemleak reported some memory leak on reading proc files. After adding some debug lines, find that proc_seq_fops is using seq_release as release handler, which won't handle the free of 'private' field of seq_file, while in fact the open handler proc_seq_open could create the private data with __seq_open_private when state_size is greater than zero. So after reading files created with proc_create_seq_private, such as /proc/timer_list and /proc/vmallocinfo, the private mem of a seq_file is not freed. Fix it by adding the paired proc_seq_release as the default release handler of proc_seq_ops instead of seq_release. Fixes: 44414d82cfe0 ("proc: introduce proc_create_seq_private") Reviewed-by: Christoph Hellwig <hch@lst.de> CC: Christoph Hellwig <hch@lst.de> Signed-off-by: Chunyu Hu <chuhu@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1 parent ce397d2
Tip revision: 877f919e192a09e77962a13d7165783027dee5fd authored by Chunyu Hu on 09 June 2018, 19:51:24 UTC
proc: add proc_seq_release
proc: add proc_seq_release
Tip revision: 877f919
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.cocciconfig | -rw-r--r-- | 59 bytes |
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COPYING | -rw-r--r-- | 423 bytes |
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Makefile | -rw-r--r-- | 58.3 KB |
README | -rw-r--r-- | 800 bytes |
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