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| author |   Eiichi Tsukata <devel@etsukata.com> | 2019-07-11 11:35:01 +0900 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-07-11 08:22:03 +0200 |
| commit | cbf5b73d162b22e044fe0b7d51dcaa33be065253 (patch) | |
| tree | f4baca1e7a79277c48261f22285361808633911b /fs | |
| parent | x86/asm: Move native_write_cr0/4() out of line (diff) | |
| download | linux-dev-cbf5b73d162b22e044fe0b7d51dcaa33be065253.tar.xz linux-dev-cbf5b73d162b22e044fe0b7d51dcaa33be065253.zip | |
x86/stacktrace: Prevent infinite loop in arch_stack_walk_user()
arch_stack_walk_user() checks `if (fp == frame.next_fp)` to prevent a
infinite loop by self reference but it's not enogh for circular reference.
Once a lack of return address is found, there is no point to continue the
loop, so break out.
Fixes: 02b67518e2b1 ("tracing: add support for userspace stacktraces in tracing/iter_ctrl")
Signed-off-by: Eiichi Tsukata <devel@etsukata.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20190711023501.963-1-devel@etsukata.com
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions