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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /include/video/cvisionppc.h | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
Add a sleepable verifier test that loads a graph-node local kptr in an
explicit RCU read-side critical section, then passes its node to
bpf_rbtree_remove() after the section ends.
Before the verifier fix, the stale NON_OWN_REF flag makes the node look like
a live borrowed reference and the program is accepted. After the fix, the
pointer is demoted without NON_OWN_REF and the graph kfunc argument is
rejected.
Also exercise a graph kptr loaded while a spin lock provides implicit RCU
protection. The pointer must be invalidated when the lock is released, which
guards the required ordering between non-owning-reference invalidation and
RCU demotion.
Update the existing fault-protected load test state description. The
post-unlock pointer no longer carries NON_OWN_REF, but remains readable
because the load is rewritten to use BPF_PROBE_MEM.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/video/cvisionppc.h')
| -rw-r--r-- | include/video/cvisionppc.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/video/cvisionppc.h b/include/video/cvisionppc.h new file mode 100644 index 000000000..11250eee9 --- /dev/null +++ b/include/video/cvisionppc.h @@ -0,0 +1,51 @@ +/* + * Phase5 CybervisionPPC (TVP4020) definitions for the Permedia2 framebuffer + * driver. + * + * Copyright (c) 1998-1999 Ilario Nardinocchi (nardinoc@CS.UniBO.IT) + * -------------------------------------------------------------------------- + * $Id: cvisionppc.h,v 1.8 1999/01/28 13:18:07 illo Exp $ + * -------------------------------------------------------------------------- + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#ifndef CVISIONPPC_H +#define CVISIONPPC_H + +#ifndef PM2FB_H +#include "pm2fb.h" +#endif + +struct cvppc_par { + unsigned char* pci_config; + unsigned char* pci_bridge; + u32 user_flags; +}; + +#define CSPPC_PCI_BRIDGE 0xfffe0000 +#define CSPPC_BRIDGE_ENDIAN 0x0000 +#define CSPPC_BRIDGE_INT 0x0010 + +#define CVPPC_PCI_CONFIG 0xfffc0000 +#define CVPPC_ROM_ADDRESS 0xe2000001 +#define CVPPC_REGS_REGION 0xef000000 +#define CVPPC_FB_APERTURE_ONE 0xe0000000 +#define CVPPC_FB_APERTURE_TWO 0xe1000000 +#define CVPPC_FB_SIZE 0x00800000 +#define CVPPC_MEM_CONFIG_OLD 0xed61fcaa /* FIXME Fujitsu?? */ +#define CVPPC_MEM_CONFIG_NEW 0xed41c532 /* FIXME USA?? */ +#define CVPPC_MEMCLOCK 83000 /* in KHz */ + +/* CVPPC_BRIDGE_ENDIAN */ +#define CSPPCF_BRIDGE_BIG_ENDIAN 0x02 + +/* CVPPC_BRIDGE_INT */ +#define CSPPCF_BRIDGE_ACTIVE_INT2 0x01 + +#endif /* CVISIONPPC_H */ + +/***************************************************************************** + * That's all folks! + *****************************************************************************/ |