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| author |   Jingbo Xu <jefflexu@linux.alibaba.com> | 2022-11-14 20:19:43 +0800 |
|---|---|---|
| committer |   Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-11-14 23:48:38 +0800 |
| commit | 37020bbb71d911431e16c2c940b97cf86ae4f2f6 (patch) | |
| tree | 4d62cb1eda9dd8b6ee2f1059a9746492412c11c4 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | erofs: fix use-after-free of fsid and domain_id string (diff) | |
| download | wireguard-linux-37020bbb71d911431e16c2c940b97cf86ae4f2f6.tar.xz wireguard-linux-37020bbb71d911431e16c2c940b97cf86ae4f2f6.zip | |
erofs: fix missing xas_retry() in fscache mode
The xarray iteration only holds the RCU read lock and thus may encounter
XA_RETRY_ENTRY if there's process modifying the xarray concurrently.
This will cause oops when referring to the invalid entry.
Fix this by adding the missing xas_retry(), which will make the
iteration wind back to the root node if XA_RETRY_ENTRY is encountered.
Fixes: d435d53228dd ("erofs: change to use asynchronous io for fscache readpage/readahead")
Suggested-by: David Howells <dhowells@redhat.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Jia Zhu <zhujia.zj@bytedance.com>
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20221114121943.29987-1-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions