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From: "nix at esperi dot org dot uk" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sources.redhat.com Subject: [Bug libc/7066] New: Probable buffer overrun in strtold() Date: Thu, 04 Dec 2008 00:50:00 -0000 [thread overview] Message-ID: <20081204004909.7066.nix@esperi.org.uk> (raw) When testing with the stack-protector patch in #7065, test-strtod is killed by the stack-protector: strtod ("12.345") test 0 OK strtod ("12.345e19") test 1 OK strtod ("-.1e+9") test 2 OK strtod (".125") test 3 OK strtod ("1e20") test 4 OK strtod ("0e-19") test 5 OK strtod ("4") test 6 OK strtod ("5.9e-76") test 7 OK strtod ("0x1.4p+3") test 8 OK strtod ("0xAp0") test 9 OK strtod ("0x0Ap0") test 10 OK strtod ("0x0A") test 11 OK strtod ("0xA0") test 12 OK strtod ("0x0.A0p8") test 13 OK strtod ("0x0.50p9") test 14 OK strtod ("0x0.28p10") test 15 OK strtod ("0x0.14p11") test 16 OK strtod ("0x0.0A0p12") test 17 OK strtod ("0x0.050p13") test 18 OK strtod ("0x0.028p14") test 19 OK strtod ("0x0.014p15") test 20 OK strtod ("0x00.00A0p16") test 21 OK strtod ("0x00.0050p17") test 22 OK strtod ("0x00.0028p18") test 23 OK strtod ("0x00.0014p19") test 24 OK strtod ("0x1p-1023") test 25 OK strtod ("0x0.8p-1022") test 26 OK strtod ("Inf") test 27 OK strtod ("-Inf") test 28 OK strtod ("+InFiNiTy") test 29 OK strtod ("0x80000Ap-23") test 30 OK *** stack smashing detected ***: tst-strtod - terminated tst-strtod: stack smashing attack in function <unknown> - terminated tst-strtod: stack smashing attack in function <unknown> - terminated The backtrace (when linked against -lc_g) is as follows: #0 0xb80f2424 in __kernel_vsyscall () #1 0x0806bc2b in __stack_chk_fail () at stack_chk_fail.c:295 #2 0x08057426 in ____strtold_l_internal (nptr=0x80ae069 "42.", '0' <repeats 19 times>, "1", endptr=0x0, group=0, loc=0x80cc020) at ../stdlib/strtod_l.c:1571 #3 0x080509a7 in strtold (nptr=0x80ae069 "42.", '0' <repeats 19 times>, "1", endptr=0x0) at strtod.c:70 #4 0x0804863e in main (argc=1, argv=0xbf9f1af4) at tst-strtod.c:168 I'll attach a one-liner to reproduce it as soon as I strip the test down (I used to have one, but that was six months ago). -- Summary: Probable buffer overrun in strtold() Product: glibc Version: unspecified Status: NEW Severity: normal Priority: P2 Component: libc AssignedTo: drepper at redhat dot com ReportedBy: nix at esperi dot org dot uk CC: glibc-bugs at sources dot redhat dot com GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://sourceware.org/bugzilla/show_bug.cgi?id=7066 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.
next reply other threads:[~2008-12-04 0:50 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-12-04 0:50 nix at esperi dot org dot uk [this message] 2008-12-04 12:13 ` [Bug libc/7066] " nix at esperi dot org dot uk 2008-12-04 14:09 ` pasky at suse dot cz 2008-12-05 0:18 ` nix at esperi dot org dot uk 2010-09-01 19:41 ` drepper at redhat dot com
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