diff options
| author | Oleg Nesterov <[email protected]> | 2022-12-04 18:39:33 +0100 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2022-12-05 11:55:18 +0100 |
| commit | cefa72129e45313655d53a065b8055aaeb01a0c9 (patch) | |
| tree | 8bcf7483e6a5f7874f5fe77782ff812fe337f8f0 /drivers/fpga/fpga-mgr.c | |
| parent | 023e59d4cee91dd3ca811eb01db2c5fb9f783dc2 (diff) | |
uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix
Intel ICC -hotpatch inserts 2-byte "0x66 0x90" NOP at the start of each
function to reserve extra space for hot-patching, and currently it is not
possible to probe these functions because branch_setup_xol_ops() wrongly
rejects NOP with REP prefix as it treats them like word-sized branch
instructions.
Fixes: 250bbd12c2fe ("uprobes/x86: Refuse to attach uprobe to "word-sized" branch insns")
Reported-by: Seiji Nishikawa <[email protected]>
Suggested-by: Denys Vlasenko <[email protected]>
Signed-off-by: Oleg Nesterov <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Masami Hiramatsu (Google) <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions