| Age | Commit message (Collapse) | Author |
|---|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf events fixes from Ingo Molnar:
- Fix race between perf_event_exit_task() and perf_pending_task()
(Luo Gengkun)
- Fix perf header output management regressions (Ian Rogers)
- Require kernel access for text poke events (Zhengchuan Liang)
* tag 'perf-urgent-2026-10-04' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf: Require kernel access for text poke events
perf: Replace perf_event_header__init_id with full header init
perf: Fix race between perf_event_exit_task() and perf_pending_task()
|
|
Pull bpf fixes from Alexei Starovoitov:
- Fix overflow of backward jump offset in constant blinding
(Alexei Starovoitov)
- Fix packet range of packet pointers sharing an id when var_off
tightens umax of one pointer and not the other (Alexei Starovoitov)
- Fix objects stuck in free_by_rcu_ttrace list of bpf memalloc
(Alexei Starovoitov)
- Fix use-after-free of progs detached from busy trampolines: wait for
an RCU tasks grace period before freeing trampoline progs, and patch
detached progs out of trampoline images that are still in use
(Florent Revest)
- Hold map BTF for the memory allocator destructor record to fix UAF in
deferred bpf_mem_alloc destruction (Kumar Kartikeya Dwivedi)
- Fix missing migration protection in resizable hashtab
lookup_and_delete batch operation (Ömer Mete Kaya)
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
bpf: Fix missing migration protection in __rhtab_map_lookup_and_delete_batch()
selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace
bpf: Fix objects stuck in free_by_rcu_ttrace
bpf: Factor out __do_call_rcu_ttrace()
selftests/bpf: Test packet range of pointers sharing an id
bpf: Fix packet range of pointers sharing an id
selftests/bpf: Detach a trampoline prog while a task sleeps before it
bpf: Skip detached progs in trampoline images that are still in use
bpf: Wait for an RCU tasks grace period before freeing trampoline progs
bpf: Hold map BTF for the memory allocator destructor record
bpf: Fix overflow of jump offset in constant blinding
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
Pull io_uring fixes from Jens Axboe:
- Fix a task_work add use-after-free with SQPOLL.
The sqpoll thread could pop and complete the last request while
io_req_normal_work_add() was still looking at them after the mpscq
push.
Use the same approach as DEFER_TASKRUN to protect from that, holding
an RCU read lock across the add, and have exit wait for an RCU grace
period for SQPOLL rings as well.
- CQE32 ring fixes: correct the free entry check for 32b CQEs, zero the
big_cqe for aux CQEs, and only post the dummy skip CQE on CQE_MIXED
rings
- Mark the source filter table as COW when cloning bpf filters, so
registering another filter on the source doesn't modify the shared
table in place
- Initialize the task context before running the BPF loop
- Requeue zcrx multishot receives stopped by a local resource
- End a TX_TIMESTAMP multishot cmd when the CQ is full (lollipopkit)
* tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
io_uring: fix task_work add use-after-free with SQPOLL
io_uring/cmd_net: end TX_TIMESTAMP multishot when the CQ is full
io_uring/zcrx: requeue multishot receives stopped by a local resource
io_uring: initialize task context before running the BPF loop
io_uring: zero big_cqe for aux CQEs on CQE32 rings
io_uring: fix free entry check for 32b CQEs on CQE32 rings
io_uring: only post the dummy skip CQE on CQE_MIXED rings
io_uring/bpf_filter: mark source as COW when cloning filters
|
|
Add tests where two packet pointers share an id and tightening one
pointer's umax from its var_off would put it less than their constant
distance from the other's umax: with an index & 0x38 capped at 50, the
base pointer keeps umax 50, so the pointer 8 bytes further on must keep
umax 58, even though its known bits allow at most 56.
These refused a valid program or accepted an out-of-bounds access before
the fix:
- check the advanced copy, load through the base: valid, was refused;
- check the base, load the byte at base + 1 through a copy advanced by
8: was accepted;
- check base + 4, load 4 bytes at base + 2 through base + 8: reads two
bytes past the checked range, was accepted;
- the same as the second with data_meta pointers checked against data:
was accepted.
These pass with and without the fix and cover nearby paths:
- subtract an unknown scalar from a checked pointer and load below it
(the range is kept across a new id);
- reach a load through two paths whose checks cover 8 and 7 bytes after
the loaded pointer; the second path must not be pruned by the first;
- spill a copy of a pointer, check the pointer, fill the copy and load
one byte past the checked range: the load is refused, and the copy
has the range of the check.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20261001145255.855630-2-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
|
|
perf_iterate_sb() invokes its callback for each matching perf_event on
the CPU and task context, passing a shared caller-allocated event
structure.
perf_event_header__init_id() mutated header->size in place by adding
event->id_header_size, requiring sideband output callbacks to save and
restore header fields across iterations. Three sideband callbacks failed
to save and restore header.size around perf_event_header__init_id():
- perf_event_ksymbol_output()
- perf_event_bpf_output()
- perf_event_text_poke_output()
When multiple events with attr.ksymbol, attr.bpf_event, or
attr.text_poke and sample_id_all are active on the same CPU, each
subsequent event receives a record whose header.size is inflated by all
preceding events' id_header_size values while only a single id_sample is
written, leaving uninitialized ring-buffer bytes at the end of the
record and causing userspace perf to fail with -EFAULT ("Bad address")
when parsing the sample_id trailer.
Similarly, perf_event_mmap_output() set PERF_RECORD_MISC_MMAP_BUILD_ID
in mmap_event->event_id.header.misc when event->attr.build_id was
enabled, but only saved and restored header.size and header.type. If an
event with attr.build_id was followed by an event with attr.mmap2 and
!attr.build_id, the second event received PERF_RECORD_MISC_MMAP_BUILD_ID
in header.misc while its payload contained maj/min/ino/ino_generation
instead of a build ID.
Rather than splitting header initialization between callers and output
callbacks and saving/restoring mutated header fields, replace
perf_event_header__init_id() with perf_event_header__init(), which
initializes header->type, header->misc, and header->size alongside the
sample_id fields on each invocation.
Fixes: 76193a94522f ("perf, bpf: Introduce PERF_RECORD_KSYMBOL")
Fixes: 6ee52e2a3fe4 ("perf, bpf: Introduce PERF_RECORD_BPF_EVENT")
Fixes: e17d43b93e54 ("perf: Add perf text poke event")
Fixes: 88a16a130933 ("perf: Add build id data in mmap2 event")
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260929222332.973435-1-irogers@google.com
Cc: stable@vger.kernel.org
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipe
Pull IPE fixes from Fan Wu:
"Two fixes for use-after-free issues found by recent LLM-assisted code
analysis.
- move successful policy load auditing under the new policy
directory's inode lock, preventing a concurrent policy deletion
from freeing the policy while it is still being audited
- protect the dm-verity root hash with RCU, preventing policy
evaluation from racing with root hash replacement during preresume"
* tag 'ipe-pr-20260925' of git://git.kernel.org/pub/scm/linux/kernel/git/wufan/ipe:
ipe: protect the dm-verity root hash with RCU
ipe: fix use-after-free when auditing a newly loaded policy
|
