[Bug libc/34347] New: Incorrect trailing bitfield word of struct tcp_info
"adhemerval.zanella at linaro dot org via Glibc-bugs" <[email protected]> Fri, 03 Jul 2026 19:28:38 +0000
| Newsgroups | gmane.comp.lib.glibc.bugs |
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https://sourceware.org/bugzilla/show_bug.cgi?id=34347
Bug ID: 34347
Summary: Incorrect trailing bitfield word of struct tcp_info
Product: glibc
Version: 2.43
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: adhemerval.zanella at linaro dot org
CC: drepper.fsp at gmail dot com
Target Milestone: ---
Commit 7e46c2aae47d3284d4eb0845ddcc3951e987d681 synced the accurate ECN
additions but encoded the trailing bitfield word of struct tcp_info incorrectly
as two uint16_t fields (tcpi_accecn_fail_mode and tcpi_accecn_opt_seen),
omitting tcpi_ecn_mode and tcpi_options2. Restore
the kernel layout:
uint32_t tcpi_ecn_mode:2,
tcpi_accecn_opt_seen:2,
tcpi_accecn_fail_mode:4,
tcpi_options2:24;
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