forked from Minki/linux
3740651bf7
The commit cited below claims to fix a use-after-free condition after
tls_device_down. Apparently, the description wasn't fully accurate. The
context stayed alive, but ctx->netdev became NULL, and the offload was
torn down without a proper fallback, so a bug was present, but a
different kind of bug.
Due to misunderstanding of the issue, the original patch dropped the
refcount_dec_and_test line for the context to avoid the alleged
premature deallocation. That line has to be restored, because it matches
the refcount_inc_not_zero from the same function, otherwise the contexts
that survived tls_device_down are leaked.
This patch fixes the described issue by restoring refcount_dec_and_test.
After this change, there is no leak anymore, and the fallback to
software kTLS still works.
Fixes:
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|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| tls_device_fallback.c | ||
| tls_device.c | ||
| tls_main.c | ||
| tls_proc.c | ||
| tls_sw.c | ||
| tls_toe.c | ||
| trace.c | ||
| trace.h | ||