bpf, arena: keep range tree consistent on kmalloc_nolock failure - #8636
Open
kernel-patches-daemon-bpf-rc[bot] wants to merge 3 commits into
Open
bpf, arena: keep range tree consistent on kmalloc_nolock failure#8636kernel-patches-daemon-bpf-rc[bot] wants to merge 3 commits into
kernel-patches-daemon-bpf-rc[bot] wants to merge 3 commits into
Conversation
Author
|
Upstream branch: 11c1e83 |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 6, 2026 09:11
28abc40 to
1824cf2
Compare
Author
|
Upstream branch: 7d008cd |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 6, 2026 09:16
30b8a3d to
53f96d9
Compare
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 6, 2026 15:07
1824cf2 to
6ac2541
Compare
Author
|
Upstream branch: 8c7f55d |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 6, 2026 15:12
53f96d9 to
18a63a5
Compare
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 7, 2026 05:12
6ac2541 to
bbe1ae8
Compare
Author
|
Upstream branch: 41c129f |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 7, 2026 05:17
18a63a5 to
25fe22c
Compare
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 7, 2026 13:04
bbe1ae8 to
dd2acb0
Compare
Author
|
Upstream branch: 2b1f9f6 |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 7, 2026 13:10
25fe22c to
fd637d7
Compare
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 7, 2026 21:09
dd2acb0 to
75f1c0e
Compare
Author
|
Upstream branch: e1d9b82 |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 7, 2026 21:17
fd637d7 to
a2092c9
Compare
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 7, 2026 22:48
75f1c0e to
f776207
Compare
Author
|
Upstream branch: 51476f6 |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 7, 2026 22:53
a2092c9 to
6acd310
Compare
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 8, 2026 10:01
f776207 to
b882df0
Compare
Author
|
Upstream branch: 8b365b3 |
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 8, 2026 10:06
6acd310 to
b31cff6
Compare
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
bpf-next_base
branch
from
August 8, 2026 10:13
b882df0 to
818432c
Compare
Author
|
Upstream branch: d114bb9 |
range_tree_clear() modifies the range tree before allocating the node needed to split a range. If the allocation fails, the function returns -ENOMEM with part of the range already removed from the tree, leaving those arena slots permanently unavailable. Pre-allocate the node before modifying the tree so a failure leaves it unmodified. Fixes: b795379 ("bpf: Introduce range_tree data structure and use it in bpf arena") Signed-off-by: Yuan Chen <chenyuan@kylinos.cn>
range_tree_set() clears overlapping ranges before allocating the node for the new range. If the allocation fails, the function returns -ENOMEM with the cleared range already removed from the tree, leaving those arena slots permanently unavailable. Allocate only when the range has no adjacent free range on either side; this is known before the clear, since any range covering start - 1 or last + 1 survives it as an adjacent piece. A failure therefore still leaves the tree unmodified. Fixes: b795379 ("bpf: Introduce range_tree data structure and use it in bpf arena") Signed-off-by: Yuan Chen <chenyuan@kylinos.cn>
…_free_worker arena_free_pages() and arena_free_worker() ignore range_tree_set() errors and proceed to clear PTEs and free pages, even though the range tree still considers the range allocated. The range then becomes permanently unavailable. Check the return value: in arena_free_pages() abort the free on error; in arena_free_worker() move range_tree_set() before PTE clearing and skip the span on error. Fixes: b795379 ("bpf: Introduce range_tree data structure and use it in bpf arena") Signed-off-by: Yuan Chen <chenyuan@kylinos.cn>
kernel-patches-daemon-bpf-rc
Bot
force-pushed
the
series/1141108=>bpf-next
branch
from
August 8, 2026 10:18
b31cff6 to
a59e484
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Pull request for series with
subject: bpf, arena: keep range tree consistent on kmalloc_nolock failure
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1141108