386afd6dc6
commit a6361f0ca4b25460f2cdf3235ebe8115f622901e upstream.
Updates to the bitfields in struct packet_sock are not atomic.
Serialize these read-modify-write cycles.
Move po->running into a separate variable. Its writes are protected by
po->bind_lock (except for one startup case at packet_create). Also
replace a textual precondition warning with lockdep annotation.
All others are set only in packet_setsockopt. Serialize these
updates by holding the socket lock. Analogous to other field updates,
also hold the lock when testing whether a ring is active (pg_vec).
Fixes:
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| .. | ||
| Kconfig | ||
| Makefile | ||
| af_packet.c | ||
| diag.c | ||
| internal.h | ||