* memory leaks in btrfs raid code in 6.19-rc?
@ 2026-01-26 4:53 Christoph Hellwig
2026-01-30 17:18 ` Filipe Manana
0 siblings, 1 reply; 2+ messages in thread
From: Christoph Hellwig @ 2026-01-26 4:53 UTC (permalink / raw)
To: David Sterba, Qu Wenruo; +Cc: linux-btrfs
When running xfstests on btrfs with a SCRATCH_DEV_POOL and kmemleak
enabled I see a lot of these kmemleak reports, start with btrfs/060,
but affecting basically all tests exercising the RAID code:
unreferenced object 0xffff888111f61890 (size 16):
comm "fsstress", pid 5252, jiffies 4294898624
hex dump (first 16 bytes):
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
backtrace (crc d3088d4f):
__kmalloc_noprof+0x3c8/0x510
alloc_rbio.isra.0+0x127/0x390
raid56_parity_write+0x2b/0x180
btrfs_submit_bbio+0x26d/0x870
submit_one_bio+0x7a/0xb0
submit_extent_folio+0x163/0x320
extent_writepage_io+0x2c9/0x4d0
extent_write_cache_pages+0x396/0x9d0
btrfs_writepages+0x70/0x120
do_writepages+0xc8/0x160
filemap_writeback+0xb3/0xe0
btrfs_fdatawrite_range+0x22/0x60
btrfs_wait_ordered_range+0x47/0x110
btrfs_fallocate+0x193/0x11a0
vfs_fallocate+0x160/0x3c0
__x64_sys_fallocate+0x44/0xa0
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: memory leaks in btrfs raid code in 6.19-rc?
2026-01-26 4:53 memory leaks in btrfs raid code in 6.19-rc? Christoph Hellwig
@ 2026-01-30 17:18 ` Filipe Manana
0 siblings, 0 replies; 2+ messages in thread
From: Filipe Manana @ 2026-01-30 17:18 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: David Sterba, Qu Wenruo, linux-btrfs
On Mon, Jan 26, 2026 at 4:56 AM Christoph Hellwig <hch@lst.de> wrote:
>
> When running xfstests on btrfs with a SCRATCH_DEV_POOL and kmemleak
> enabled I see a lot of these kmemleak reports, start with btrfs/060,
> but affecting basically all tests exercising the RAID code:
>
> unreferenced object 0xffff888111f61890 (size 16):
> comm "fsstress", pid 5252, jiffies 4294898624
> hex dump (first 16 bytes):
> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
> backtrace (crc d3088d4f):
> __kmalloc_noprof+0x3c8/0x510
> alloc_rbio.isra.0+0x127/0x390
> raid56_parity_write+0x2b/0x180
> btrfs_submit_bbio+0x26d/0x870
> submit_one_bio+0x7a/0xb0
> submit_extent_folio+0x163/0x320
> extent_writepage_io+0x2c9/0x4d0
> extent_write_cache_pages+0x396/0x9d0
> btrfs_writepages+0x70/0x120
> do_writepages+0xc8/0x160
> filemap_writeback+0xb3/0xe0
> btrfs_fdatawrite_range+0x22/0x60
> btrfs_wait_ordered_range+0x47/0x110
> btrfs_fallocate+0x193/0x11a0
> vfs_fallocate+0x160/0x3c0
> __x64_sys_fallocate+0x44/0xa0
This fixes it:
https://lore.kernel.org/linux-btrfs/140aedc1e1af2866bb838d29b742c2015d55d91e.1769793280.git.fdmanana@suse.com/
Thanks.
>
>
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