public inbox for glibc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug nptl/29755] New: pthread_getname_np() have out-of-bounds memory access @ 2022-11-07 7:26 zhuorong.lin at outlook dot com 2022-11-07 14:11 ` [Bug nptl/29755] " schwab@linux-m68k.org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: zhuorong.lin at outlook dot com @ 2022-11-07 7:26 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29755 Bug ID: 29755 Summary: pthread_getname_np() have out-of-bounds memory access Product: glibc Version: 2.34 Status: UNCONFIRMED Severity: minor Priority: P2 Component: nptl Assignee: unassigned at sourceware dot org Reporter: zhuorong.lin at outlook dot com CC: drepper.fsp at gmail dot com Target Milestone: --- When the return value of buf is n = 0, the following buf[n-1] will out-of-bounds memory access #define FMT "/proc/self/task/%u/comm" char fname[sizeof (FMT) + 8]; sprintf (fname, FMT, (unsigned int) pd->tid); int fd = __open64_nocancel (fname, O_RDONLY); if (fd == -1) return errno; int res = 0; ssize_t n = TEMP_FAILURE_RETRY (__read_nocancel (fd, buf, len)); // if n == 0 if (n < 0) res = errno; else { if (buf[n - 1] == '\n') // out-of-bounds memory access buf[n - 1] = '\0'; else if (n == len) res = ERANGE; else buf[n] = '\0'; } __close_nocancel_nostatus (fd); -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug nptl/29755] pthread_getname_np() have out-of-bounds memory access 2022-11-07 7:26 [Bug nptl/29755] New: pthread_getname_np() have out-of-bounds memory access zhuorong.lin at outlook dot com @ 2022-11-07 14:11 ` schwab@linux-m68k.org 2022-11-08 8:13 ` sam at gentoo dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: schwab@linux-m68k.org @ 2022-11-07 14:11 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29755 --- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> --- I think the kernel guarantees that /comm is never empty. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug nptl/29755] pthread_getname_np() have out-of-bounds memory access 2022-11-07 7:26 [Bug nptl/29755] New: pthread_getname_np() have out-of-bounds memory access zhuorong.lin at outlook dot com 2022-11-07 14:11 ` [Bug nptl/29755] " schwab@linux-m68k.org @ 2022-11-08 8:13 ` sam at gentoo dot org 2022-11-08 8:54 ` zhuorong.lin at outlook dot com 2022-11-08 16:51 ` adhemerval.zanella at linaro dot org 3 siblings, 0 replies; 5+ messages in thread From: sam at gentoo dot org @ 2022-11-08 8:13 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29755 Sam James <sam at gentoo dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sam at gentoo dot org -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug nptl/29755] pthread_getname_np() have out-of-bounds memory access 2022-11-07 7:26 [Bug nptl/29755] New: pthread_getname_np() have out-of-bounds memory access zhuorong.lin at outlook dot com 2022-11-07 14:11 ` [Bug nptl/29755] " schwab@linux-m68k.org 2022-11-08 8:13 ` sam at gentoo dot org @ 2022-11-08 8:54 ` zhuorong.lin at outlook dot com 2022-11-08 16:51 ` adhemerval.zanella at linaro dot org 3 siblings, 0 replies; 5+ messages in thread From: zhuorong.lin at outlook dot com @ 2022-11-08 8:54 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29755 --- Comment #2 from lin zhuorong <zhuorong.lin at outlook dot com> --- Are you sure? -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug nptl/29755] pthread_getname_np() have out-of-bounds memory access 2022-11-07 7:26 [Bug nptl/29755] New: pthread_getname_np() have out-of-bounds memory access zhuorong.lin at outlook dot com ` (2 preceding siblings ...) 2022-11-08 8:54 ` zhuorong.lin at outlook dot com @ 2022-11-08 16:51 ` adhemerval.zanella at linaro dot org 3 siblings, 0 replies; 5+ messages in thread From: adhemerval.zanella at linaro dot org @ 2022-11-08 16:51 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29755 Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |adhemerval.zanella at linaro dot o | |rg --- Comment #3 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> --- Even if kernel that guarantees is not empty, I still think it should fix it. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-11-08 16:51 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-11-07 7:26 [Bug nptl/29755] New: pthread_getname_np() have out-of-bounds memory access zhuorong.lin at outlook dot com 2022-11-07 14:11 ` [Bug nptl/29755] " schwab@linux-m68k.org 2022-11-08 8:13 ` sam at gentoo dot org 2022-11-08 8:54 ` zhuorong.lin at outlook dot com 2022-11-08 16:51 ` adhemerval.zanella at linaro dot org
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).