diff options
| author |   Vasily Gorbik <gor@linux.ibm.com> | 2026-03-22 03:35:10 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2026-03-23 07:58:32 -0600 |
| commit | 67807fbaf12719fca46a622d759484652b79c7c3 (patch) | |
| tree | f85bf87728fc6e080f30caeaa6020f3ef5899c3e /samples/kobject/ssh:/git@git.zx2c4.com/git: | |
| parent | ublk: move cold paths out of __ublk_batch_dispatch() for icache efficiency (diff) | |
block: fix bio_alloc_bioset slowpath GFP handling
bio_alloc_bioset() first strips __GFP_DIRECT_RECLAIM from the optimistic
fast allocation attempt with try_alloc_gfp(). If that fast path fails,
the slowpath checks saved_gfp to decide whether blocking allocation is
allowed, but then still calls mempool_alloc() with the stripped gfp mask.
That can lead to a NULL bio pointer being passed into bio_init().
Fix the slowpath by using saved_gfp for the bio and bvec mempool
allocations.
Fixes: b520c4eef83d ("block: split bio_alloc_bioset more clearly into a fast and slowpath")
Reported-by: syzbot+09ddb593eea76a158f42@syzkaller.appspotmail.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/p01.gc6e9ad5845ad.ttca29g@ub.hpns
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'samples/kobject/ssh:/git@git.zx2c4.com/git:')
0 files changed, 0 insertions, 0 deletions