Date: Sun, 14 Dec 2025 19:44:14 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 289017] [lagg] A time-of-check to time-of-use (TOCTOU) race exists in the Link Aggregation (LAGG) network subsystem Message-ID: <bug-289017-7501-QGggmWbMVt@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-289017-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-289017-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289017 --- Comment #8 from Gui-Dong Han <hanguidong02@gmail.com> --- Also, I want to highlight that compiler optimizations (such as inlining and tail call optimization) can make pinpointing the exact crash location in a stock kernel extremely difficult. I observed that crashes on the unmodified kernel often appear to stall at ether_output+0x6b0, masking the deeper call chain. The detailed stack trace provided above (showing ether_output_frame, lagg_transmit_ethernet, and lagg_lacp_start) was only obtained after I explicitly added __noinline and __attribute__((optnone)) to the relevant functions to disable these optimizations. -- You are receiving this mail because: You are the assignee for the bug.help
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