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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2020-05-14 15:31:10 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-20 08:20:34 +0200 |
| commit | 136353c5066c82f07670067154534d77205eada6 (patch) | |
| tree | 5a8785867113a789587011d295ea894d80841b7f /fs/exec.c | |
| parent | 91b9ce04ff1fdb6a9c034b347131caa4b6ecf6dc (diff) | |
x86/unwind/orc: Fix error handling in __unwind_start()
commit 71c95825289f585014fe9741b051d32a7a916680 upstream.
The unwind_state 'error' field is used to inform the reliable unwinding
code that the stack trace can't be trusted. Set this field for all
errors in __unwind_start().
Also, move the zeroing out of the unwind_state struct to before the ORC
table initialization check, to prevent the caller from reading
uninitialized data if the ORC table is corrupted.
Fixes: af085d9084b4 ("stacktrace/x86: add function for detecting reliable stack traces")
Fixes: d3a09104018c ("x86/unwinder/orc: Dont bail on stack overflow")
Fixes: 98d0c8ebf77e ("x86/unwind/orc: Prevent unwinding before ORC initialization")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/d6ac7215a84ca92b895fdd2e1aa546729417e6e6.1589487277.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/exec.c')
0 files changed, 0 insertions, 0 deletions