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| author |  Christoph Hellwig <hch@lst.de>
| 2020-06-08 21:34:44 -0700 |
|---|---|---|
| committer |  Linus Torvalds <torvalds@linux-foundation.org>
| 2020-06-09 09:39:15 -0700 |
| commit | 9de1fec50b23117f0a19f7609cc837ca72e764a6 (patch) | |
| tree | 067572c59d739d213debb438e5eed52dc3aed4d6 /mm/maccess.c | |
| parent | bpf: rework the compat kernel probe handling (diff) | |
| download | linux-9de1fec50b23117f0a19f7609cc837ca72e764a6.tar.gz linux-9de1fec50b23117f0a19f7609cc837ca72e764a6.tar.bz2 linux-9de1fec50b23117f0a19f7609cc837ca72e764a6.zip | |
tracing/kprobes: handle mixed kernel/userspace probes better
Instead of using the dangerous probe_kernel_read and strncpy_from_unsafe
helpers, rework probes to try a user probe based on the address if the
architecture has a common address space for kernel and userspace.
[svens@linux.ibm.com:use strncpy_from_kernel_nofault() in fetch_store_string()]
Link: http://lkml.kernel.org/r/20200606181903.49384-1-svens@linux.ibm.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200521152301.2587579-15-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/maccess.c')
0 files changed, 0 insertions, 0 deletions