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[v3,0/2] mm: slub: Enhanced debugging in slub error

Message ID 20250220033953.1606820-1-hyesoo.yu@samsung.com (mailing list archive)
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Series mm: slub: Enhanced debugging in slub error | expand

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Hyesoo Yu Feb. 20, 2025, 3:39 a.m. UTC 
Dear Maintainer,

The purpose is to improve the debugging capabilities of the slub allocator
when a error occurs. The following improvements have been made:

 - Added WARN() calls at specific locations (slab_err, object_err) to detect
errors effectively and to generate a crash dump if panic_on_warn is enabled.

 - Additionally, the printing location in check_object has been adjusted to
display the broken data before the restoration process. This improvement
allows for a better understanding of how the data was corrupted.

This series combines two patches that were discussed seperately in the links below.
https://lore.kernel.org/linux-mm/20250120082908.4162780-1-hyesoo.yu@samsung.com/
https://lore.kernel.org/linux-mm/20250120083023.4162932-1-hyesoo.yu@samsung.com/

Thanks you.

version 2 changes
 - Used WARN() to trigger a panic instead of direct calling of BUG_ON()
 - Print the broken data only once before the restore.

version 3 changes
 - Move WARN() from slab_fix to slab_err and object to call WARN on
 all error reporting paths.
 - Change the parameter t ype of check_bytes_and_report.

Hyesoo Yu (2):
  mm: slub: Print the broken data before restoring slub.
  mm: slub: call WARN() when the slab detect an error

 mm/slub.c | 60 ++++++++++++++++++++++++++++++-------------------------
 1 file changed, 33 insertions(+), 27 deletions(-)