Alexei Starovoitov 5fb750e8a9 bpf: Replace bpf_map_kmalloc_node() with kmalloc_nolock() to allocate bpf_async_cb structures. ... The following kmemleak splat: [ 8.105530] kmemleak: Trying to color unknown object at 0xff11000100e918c0 as Black [ 8.106521] Call Trace: [ 8.106521] <TASK> [ 8.106521] dump_stack_lvl+0x4b/0x70 [ 8.106521] kvfree_call_rcu+0xcb/0x3b0 [ 8.106521] ? hrtimer_cancel+0x21/0x40 [ 8.106521] bpf_obj_free_fields+0x193/0x200 [ 8.106521] htab_map_update_elem+0x29c/0x410 [ 8.106521] bpf_prog_cfc8cd0f42c04044_overwrite_cb+0x47/0x4b [ 8.106521] bpf_prog_8c30cd7c4db2e963_overwrite_timer+0x65/0x86 [ 8.106521] bpf_prog_test_run_syscall+0xe1/0x2a0 happens due to the combination of features and fixes, but mainly due to commit 6d78b4473c ("bpf: Tell memcg to use allow_spinning=false path in bpf_timer_init()") It's using __GFP_HIGH, which instructs slub/kmemleak internals to skip kmemleak_alloc_recursive() on allocation, so subsequent kfree_rcu()-> kvfree_call_rcu()->kmemleak_ignore() complains with the above splat. To fix this imbalance, replace bpf_map_kmalloc_node() with kmalloc_nolock() and kfree_rcu() with call_rcu() + kfree_nolock() to make sure that the objects allocated with kmalloc_nolock() are freed with kfree_nolock() rather than the implicit kfree() that kfree_rcu() uses internally. Note, the kmalloc_nolock() happens under bpf_spin_lock_irqsave(), so it will always fail in PREEMPT_RT. This is not an issue at the moment, since bpf_timers are disabled in PREEMPT_RT. In the future bpf_spin_lock will be replaced with state machine similar to bpf_task_work. Fixes: 6d78b4473c ("bpf: Tell memcg to use allow_spinning=false path in bpf_timer_init()") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev> Acked-by: Harry Yoo <harry.yoo@oracle.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: linux-mm@kvack.org Link: https://lore.kernel.org/bpf/20251015000700.28988-1-alexei.starovoitov@gmail.com		2025-10-15 12:22:22 +02:00
..
acpi	More power management updates for 6.18-rc1	2025-10-07 09:39:51 -07:00
asm-generic	hyperv-next for v6.18	2025-10-07 08:40:15 -07:00
clocksource	clocksource/drivers/arm_arch_timer_mmio: Switch over to standalone driver	2025-09-23 12:31:50 +02:00
crypto	This update includes the following changes:	2025-10-04 14:59:29 -07:00
cxl
drm	drm/gpusvm, drm/xe: Fix userptr to not allow device private pages	2025-10-02 21:57:52 -07:00
dt-bindings	There's a bunch of patches here across drivers/clk/ to migrate drivers to use	2025-10-07 09:28:37 -07:00
hyperv	hyperv: Remove the spurious null directive line	2025-10-02 21:21:24 +00:00
keys	KEYS: trusted_tpm1: Move private functionality out of public header	2025-09-27 21:05:06 +03:00
kunit	linux_kselftest-kunit-6.18-rc1	2025-10-01 19:15:11 -07:00
kvm	KVM/arm64 updates for 6.18	2025-09-30 13:23:28 -04:00
linux	bpf: Replace bpf_map_kmalloc_node() with kmalloc_nolock() to allocate bpf_async_cb structures.	2025-10-15 12:22:22 +02:00
math-emu
media
memory
misc
net	net: psp: don't assume reply skbs will have a socket	2025-10-03 10:23:50 -07:00
pcmcia
ras
rdma
rv	kernel-6.18-rc1.clone3	2025-09-29 10:36:50 -07:00
scsi	SCSI misc on 20251002	2025-10-03 19:17:48 -07:00
soc	There's a bunch of patches here across drivers/clk/ to migrate drivers to use	2025-10-07 09:28:37 -07:00
sound	ASoC: Updates for v6.18 round 2	2025-09-28 15:41:17 +02:00
target
trace	dma-mapping fixes for Linux 6.18:	2025-10-07 12:48:06 -07:00
uapi	bpf-fixes	2025-10-11 10:31:38 -07:00
ufs	scsi: ufs: core: Include UTP error in INT_FATAL_ERRORS	2025-09-30 16:10:29 -04:00
vdso	Updates for the VDSO subsystem:	2025-09-30 16:58:21 -07:00
video
xen
Kbuild