Qian Cai a805c11165 iomap: fix WARN_ON_ONCE() from unprivileged users ...

It is trivial to trigger a WARN_ON_ONCE(1) in iomap_dio_actor() by
unprivileged users which would taint the kernel, or worse - panic if
panic_on_warn or panic_on_taint is set. Hence, just convert it to
pr_warn_ratelimited() to let users know their workloads are racing.
Thank Dave Chinner for the initial analysis of the racing reproducers.

Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

2020-09-10 08:26:15 -07:00

..

apply.c

iomap: Make sure iomap_end is called after iomap_begin

2020-07-06 10:49:27 -07:00

buffered-io.c

New code for 5.8:

2020-06-13 12:44:30 -07:00

direct-io.c

iomap: fix WARN_ON_ONCE() from unprivileged users

2020-09-10 08:26:15 -07:00

fiemap.c

fs: handle FIEMAP_FLAG_SYNC in fiemap_prep

2020-06-03 23:16:55 -04:00

Makefile

iomap: lift common tracing code from xfs to iomap

2019-10-21 08:51:59 -07:00

seek.c

treewide: Use fallthrough pseudo-keyword

2020-08-23 17:36:59 -05:00

swapfile.c

iomap: use a srcmap for a read-modify-write I/O

2019-10-21 08:51:59 -07:00

trace.c

iomap: lift common tracing code from xfs to iomap

2019-10-21 08:51:59 -07:00

trace.h

iomap: fall back to buffered writes for invalidation failures

2020-08-05 09:24:16 -07:00