grsecurity forums

Posted: **Wed Dec 18, 2013 4:31 pm**

Hi,

While running 3.0-3.2.53-201312151209 (and the version before) I'm running into this problem while building/testing GNU grep:

Code: Select all: Dec 18 21:22:56 kernel[1794]: [ 4965.138806] PAX: size overflow detected in function sys_dup3 fs/fcntl.c:67 cicus.55_122 max, count: 1 Dec 18 21:22:56 kernel[1794]: [ 4965.138811] Pid: 32264, comm: test-dup2 Tainted: P O 3.2.53 #1-NixOS Dec 18 21:22:56 kernel[1794]: [ 4965.138813] Call Trace: Dec 18 21:22:56 kernel[1794]: [ 4965.138819] [report_size_overflow+0x3b/0x50] report_size_overflow+0x3b/0x50 Dec 18 21:22:56 kernel[1794]: [ 4965.138819] [<ffffffff8115621b>] report_size_overflow+0x3b/0x50 Dec 18 21:22:56 kernel[1794]: [ 4965.138822] [sys_dup3+0x1c3/0x1d0] sys_dup3+0x1c3/0x1d0 Dec 18 21:22:56 kernel[1794]: [ 4965.138822] [<ffffffff81165663>] sys_dup3+0x1c3/0x1d0 Dec 18 21:22:56 kernel[1794]: [ 4965.138824] [sys_dup2+0x2b/0x70] sys_dup2+0x2b/0x70 Dec 18 21:22:56 kernel[1794]: [ 4965.138824] [<ffffffff8116569b>] sys_dup2+0x2b/0x70 Dec 18 21:22:56 kernel[1794]: [ 4965.138829] [system_call_fastpath+0x16/0x1b] system_call_fastpath+0x16/0x1b Dec 18 21:22:56 kernel[1794]: [ 4965.138829] [<ffffffff81437c5c>] system_call_fastpath+0x16/0x1b

Is this a known bug?

Posted: **Thu Dec 19, 2013 10:12 am**

Thanks for the report. It will be fixed in the next PaX version.

Size overflow in sys_dup3