Merge branch 'fix-bpf_link-grace-period-wait-for-tracepoints'

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Kumar Kartikeya Dwivedi says:

====================
Fix bpf_link grace period wait for tracepoints

A recent change to non-faultable tracepoints switched from
preempt-disabled critical sections to SRCU-fast, which breaks
assumptions in the bpf_link_free() path. Use call_srcu() to fix the
breakage.

Changelog:
----------
v3 -> v4
v3: https://lore.kernel.org/bpf/20260331005215.2813492-1-memxor@gmail.com

 * Introduce call_tracepoint_unregister_{atomic,syscall} instead. (Alexei, Steven)

v2 -> v3
v2: https://lore.kernel.org/bpf/20260330143102.1265391-1-memxor@gmail.com

 * Introduce and switch to call_tracepoint_unregister_non_faultable(). (Steven)
 * Address Andrii's comment and add Acked-by. (Andrii)
 * Drop rcu_trace_implies_rcu_gp() conversion. (Alexei)

v1 -> v2
v1: https://lore.kernel.org/bpf/20260330032124.3141001-1-memxor@gmail.com

 * Add Reviewed-by tags. (Paul, Puranjay)
 * Adjust commit descriptions and comments to clarify intent. (Puranjay)
====================

Link: https://patch.msgid.link/20260331211021.1632902-1-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Alexei Starovoitov 2026-03-31 16:01:13 -07:00

parent a8502a79e8 c76fef7dcd

commit e2d072d6a3

3 changed files with 47 additions and 2 deletions

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4

include/linux/bpf.h

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20

include/linux/tracepoint.h

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25

kernel/bpf/syscall.c

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