On 12.06.23 03:54, kernel test robot wrote:
Hello,
kernel test robot noticed "WARNING:at_mm/gup.c:#try_get_folio" on:
commit: 1ccf164ec866cb8575ab9b2e219fca875089c60e ("block: Use iov_iter_extract_pages() and page pinning in direct-io.c")
https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-6.5/block
[test failed on linux-next/master 53ab6975c12d1ad86c599a8927e8c698b144d669]
in testcase: xfstests
version: xfstests-x86_64-06c027a-1_20230529
with following parameters:
disk: 4HDD
fs: udf
test: generic-group-45
compiler: gcc-12
test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (Skylake) with 16G memory
(please refer to attached dmesg/kmsg for entire log/backtrace)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202306120931.a9606b88-oliver.sang@xxxxxxxxx
[ 121.986791][ T2220] ------------[ cut here ]------------
[ 121.992093][ T2220] WARNING: CPU: 6 PID: 2220 at mm/gup.c:76 try_get_folio (mm/gup.c:76 (discriminator 1))
I assume we have a refcount underflow (but could be an overflow?). Maybe
we used unpin_user_page() on a page not pinned via pin_user_pages() ?
--
Cheers,
David / dhildenb
