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authorLinus Torvalds <torvalds@linux-foundation.org>2020-11-20 22:47:22 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-11-20 22:47:22 +0300
commitfa5fca78bb2fe7a58ae7297407dcda1914ea8353 (patch)
tree229a19aafdbcf3692e60e14162d6c208758c1c9d /mm
parent4ccf7a01e805f04defd423fb410f47a13af76399 (diff)
parente297822b20e7fe683e107aea46e6402adcf99c70 (diff)
downloadlinux-fa5fca78bb2fe7a58ae7297407dcda1914ea8353.tar.xz
Merge tag 'io_uring-5.10-2020-11-20' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe: "Mostly regression or stable fodder: - Disallow async path resolution of /proc/self - Tighten constraints for segmented async buffered reads - Fix double completion for a retry error case - Fix for fixed file life times (Pavel)" * tag 'io_uring-5.10-2020-11-20' of git://git.kernel.dk/linux-block: io_uring: order refnode recycling io_uring: get an active ref_node from files_data io_uring: don't double complete failed reissue request mm: never attempt async page lock if we've transferred data already io_uring: handle -EOPNOTSUPP on path resolution proc: don't allow async path resolution of /proc/self components
Diffstat (limited to 'mm')
-rw-r--r--mm/filemap.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index d5e7c2029d16..3ebbe64a0106 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2347,10 +2347,15 @@ page_ok:
page_not_up_to_date:
/* Get exclusive access to the page ... */
- if (iocb->ki_flags & IOCB_WAITQ)
+ if (iocb->ki_flags & IOCB_WAITQ) {
+ if (written) {
+ put_page(page);
+ goto out;
+ }
error = lock_page_async(page, iocb->ki_waitq);
- else
+ } else {
error = lock_page_killable(page);
+ }
if (unlikely(error))
goto readpage_error;
@@ -2393,10 +2398,15 @@ readpage:
}
if (!PageUptodate(page)) {
- if (iocb->ki_flags & IOCB_WAITQ)
+ if (iocb->ki_flags & IOCB_WAITQ) {
+ if (written) {
+ put_page(page);
+ goto out;
+ }
error = lock_page_async(page, iocb->ki_waitq);
- else
+ } else {
error = lock_page_killable(page);
+ }
if (unlikely(error))
goto readpage_error;