Uros BizjakandGreg Kroah-Hartman 3f9d57c771 x86/bpf: Fix IP after emitting call depth accounting ...

commit 9d98aa0883 upstream.

Adjust the IP passed to `emit_patch` so it calculates the correct offset
for the CALL instruction if `x86_call_depth_emit_accounting` emits code.
Otherwise we will skip some instructions and most likely crash.

Fixes: b2e9dfe54b ("x86/bpf: Emit call depth accounting if required")
Link: https://lore.kernel.org/lkml/20230105214922.250473-1-joanbrugueram@gmail.com/
Co-developed-by: Joan Bruguera Micó <joanbrugueram@gmail.com>
Signed-off-by: Joan Bruguera Micó <joanbrugueram@gmail.com>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20240401185821.224068-2-ubizjak@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-04-10 16:35:48 +02:00

..

bpf_jit_comp32.c

bpf: Change value of MAX_TAIL_CALL_CNT from 32 to 33

2021-11-16 14:03:15 +01:00

bpf_jit_comp.c

x86/bpf: Fix IP after emitting call depth accounting

2024-04-10 16:35:48 +02:00

Makefile

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