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QUIC: ngx_quic_buffer_t use-after-free protection.

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Previously the last chain field of ngx_quic_buffer_t could still reference freed
chains and buffers after calling ngx_quic_free_buffer().  While normally an
ngx_quic_buffer_t object should not be used after freeing, resetting last_chain
field would prevent a potential use-after-free.
This commit is contained in:
Roman Arutyunyan 2024-05-28 17:19:21 +04:00
parent 6f8c520f49
commit 9ddc6a08f4
1 changed files with 1 additions and 0 deletions
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src/event/quic/ngx_event_quic_frames.c
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@ -648,6 +648,7 @@ ngx_quic_free_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb)
ngx_quic_free_chain(c, qb->chain);
qb->chain = NULL;
qb->last_chain = NULL;
}