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| author | Linus Torvalds <[email protected]> | 2025-01-21 17:27:22 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2025-01-22 04:30:19 +0000 |
| commit | 5f537664e705b0bf8b7e329861f20128534f6a83 (patch) | |
| tree | 6a72107580c34ce2636fe9cd5ea834a881f40889 /drivers/net/ethernet/intel/ice/ice_lib.c | |
| parent | Merge tag 'audit-pr-20250121' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
| download | kernel-5f537664e705b0bf8b7e329861f20128534f6a83.tar.gz kernel-5f537664e705b0bf8b7e329861f20128534f6a83.zip | |
cachestat: fix page cache statistics permission checking
When the 'cachestat()' system call was added in commit cf264e1329fb
("cachestat: implement cachestat syscall"), it was meant to be a much
more convenient (and performant) version of mincore() that didn't need
mapping things into the user virtual address space in order to work.
But it ended up missing the "check for writability or ownership" fix for
mincore(), done in commit 134fca9063ad ("mm/mincore.c: make mincore()
more conservative").
This just adds equivalent logic to 'cachestat()', modified for the file
context (rather than vma).
Reported-by: Sudheendra Raghav Neela <[email protected]>
Fixes: cf264e1329fb ("cachestat: implement cachestat syscall")
Tested-by: Johannes Weiner <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Acked-by: Nhat Pham <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_lib.c')
0 files changed, 0 insertions, 0 deletions