From: Andrea Cervesato via ltp <ltp@lists.linux.it>
To: "Wei Gao" <wegao@suse.com>
Cc: ltp@lists.linux.it, linuxtestproject.agent@gmail.com
Subject: Re: [LTP] shmctl03: Fix 32-bit compat mode failure by adjusting comparisons for compat mode truncation
Date: Thu, 07 May 2026 10:01:24 +0000 [thread overview]
Message-ID: <69fc62f4.5d0a0220.ce944.088d@mx.google.com> (raw)
In-Reply-To: <afxgt-lV0hlsr1L-@autotest-wegao.qe.prg2.suse.org>
Hi Wei,
>
> Kernel indeed saturates shmmax to INT_MAX for compat syscalls
> Relevant kernel code in ipc/shm.c:
>
> static int copy_compat_shminfo_to_user(void __user *buf, struct shminfo64 *in,
> int version)
> {
> if (in->shmmax > INT_MAX)
> in->shmmax = INT_MAX; <<<<<<<
> if (version == IPC_64) {
> struct compat_shminfo64 info;
> memset(&info, 0, sizeof(info));
> info.shmmax = in->shmmax;
>
You are right, LGTM
Reviewed-by: Andrea Cervesato <andrea.cervesato@suse.com>
--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com
--
Mailing list info: https://lists.linux.it/listinfo/ltp
prev parent reply other threads:[~2026-05-07 10:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-07 9:26 [LTP] [PATCH v1] shmctl03: Fix 32-bit compat mode failure by forcing limits Wei Gao via ltp
2026-04-10 13:14 ` Andrea Cervesato via ltp
2026-04-10 14:12 ` Wei Gao via ltp
2026-04-10 14:32 ` Andrea Cervesato via ltp
2026-04-13 6:19 ` [LTP] [PATCH v2] shmctl03: Fix 32-bit compat mode failure by adjusting comparisons for compat mode truncation Wei Gao via ltp
2026-04-29 8:04 ` [LTP] " linuxtestproject.agent
2026-04-29 11:18 ` [LTP] [PATCH v3] " Wei Gao via ltp
2026-04-29 12:33 ` [LTP] " linuxtestproject.agent
2026-04-30 3:47 ` [LTP] [PATCH v4] " Wei Gao via ltp
2026-04-30 6:35 ` [LTP] " linuxtestproject.agent
2026-05-06 17:28 ` Andrea Cervesato via ltp
2026-05-07 9:51 ` Wei Gao via ltp
2026-05-07 10:01 ` Andrea Cervesato via ltp [this message]
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