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| author | Eduard Zingerman <eddyz87@gmail.com> | 2026-09-04 01:33:23 -0700 |
|---|---|---|
| committer | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 12:58:04 +0200 |
| commit | 836b2fe544a5e9b5ce116622cb36fba33838c6fd (patch) | |
| tree | 95e38e4aaa0a6a78e373148b3d0af4aa2ab3d371 /fs/proc/cmdline.c | |
| download | linux-stable-836b2fe544a5e9b5ce116622cb36fba33838c6fd.tar.gz linux-stable-836b2fe544a5e9b5ce116622cb36fba33838c6fd.zip | |
selftests/bpf: Check that JMP32 pointer vs zero jumps are not predictedgrafted
Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which
the verifier used to skip, contains an out of bounds map value access,
hence w/o the previous patch the program is accepted. See previous patch
for detailed description.
Reported-by: Nicholas Carlini <npc@anthropic.com>
Suggested-by: Nicholas Carlini <npc@anthropic.com>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Diffstat (limited to 'fs/proc/cmdline.c')
| -rw-r--r-- | fs/proc/cmdline.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/proc/cmdline.c b/fs/proc/cmdline.c new file mode 100644 index 000000000..a6f761219 --- /dev/null +++ b/fs/proc/cmdline.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include "internal.h" + +static int cmdline_proc_show(struct seq_file *m, void *v) +{ + seq_puts(m, saved_command_line); + seq_putc(m, '\n'); + return 0; +} + +static int __init proc_cmdline_init(void) +{ + struct proc_dir_entry *pde; + + pde = proc_create_single("cmdline", 0, NULL, cmdline_proc_show); + pde_make_permanent(pde); + pde->size = saved_command_line_len + 1; + return 0; +} +fs_initcall(proc_cmdline_init); |