backport patches from upstream

backport-Check-h_addr_list-0-before-accessing-1.patch

@@ -0,0 +1,26 @@
+From d6ad8e0850e22098f9d46373454aa2f575434630 Mon Sep 17 00:00:00 2001
+From: Jiajie Chen <c@jia.je>
+Date: Wed, 18 Jan 2023 00:34:25 +0800
+Subject: [PATCH] Check h_addr_list[0] before accessing [1]
+
+It triggered segfaults on Fedora 37 CI.
+---
+ arg.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/arg.c b/arg.c
+index 4e906e9..818fc58 100644
+--- a/arg.c
++++ b/arg.c
+@@ -1926,6 +1926,8 @@ enter_nwad(n, sp, ep, s, he)
+ 	 */
+ 	    if (!he)
+ 		break;
++	    if (!he->h_addr_list[ac-1]) /* Check if address list ended prematurely */
++		break;
+ 	    if (!(ap = (unsigned char *)he->h_addr_list[ac++]))
+ 		break;
+ 
+-- 
+2.27.0
+

backport-Check-if-h_addr-non-null-before-memcpy.patch

@@ -0,0 +1,26 @@
+From 7f74854bad25fa401cb3e739f5aeb269efd1555f Mon Sep 17 00:00:00 2001
+From: Jiajie Chen <c@jia.je>
+Date: Wed, 18 Jan 2023 00:16:21 +0800
+Subject: [PATCH] Check if h_addr non-null before memcpy
+
+It triggered segfaults on Fedora 37 CI.
+---
+ arg.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arg.c b/arg.c
+index d001303..4e906e9 100644
+--- a/arg.c
++++ b/arg.c
+@@ -2471,7 +2471,7 @@ lkup_hostnm(hn, n)
+ 	he = gethostbyname(hn);
+ #endif	/* defined(HASIPv6) */
+ 
+-	if (!he)
++	if (!he || !he->h_addr)
+ 	    return(he);
+ /*
+  * Copy first hostname structure address to destination structure.
+-- 
+2.27.0
+

backport-Fix-empty-process-name-testcase-to-allow-the-dialect.patch

@@ -0,0 +1,28 @@
+From afb159fa4b56bf51d5dfecf442556a6cd31423c7 Mon Sep 17 00:00:00 2001
+From: Jiajie Chen <c@jia.je>
+Date: Wed, 18 Jan 2023 22:18:44 +0800
+Subject: [PATCH] Fix empty process name testcase to allow the dialect to not
+ report changed command name
+
+---
+ tests/case-22-empty-process-name.bash | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/tests/case-22-empty-process-name.bash b/tests/case-22-empty-process-name.bash
+index ce4039c..5aa8113 100755
+--- a/tests/case-22-empty-process-name.bash
++++ b/tests/case-22-empty-process-name.bash
+@@ -19,7 +19,9 @@ source tests/common.bash
+ 		exit 1
+ 	    fi
+ 	elif [[ $entry =~ c* ]]; then
+-	    if [[ $entry != c ]]; then
++	    if [[ $entry =~ cperl* ]]; then
++	        echo "The platform does not report changed command name, that's okay" >> $report
++	    elif [[ $entry != c ]]; then
+ 	        echo "Process name should be empty, expect c, got $entry" >> $report
+ 		exit 1
+ 	    fi
+-- 
+2.27.0
+

backport-linux-Fix-handling-of-empty-command-name-closing-246.patch

@@ -0,0 +1,232 @@
+From 849655be491b2fe3023bc87f6a650c2917e0c198 Mon Sep 17 00:00:00 2001
+From: Jiajie Chen <c@jia.je>
+Date: Wed, 18 Jan 2023 21:36:12 +0800
+Subject: [PATCH] [linux] Fix handling of empty command name, closing #246
+
+Add test from #246, where lsof returns stale command name when the
+command name is empty.
+
+If getting command name failed, return NULL instead of empty string.
+---
+ dialects/linux/dproc.c                | 88 +++++++++++++++------------
+ print.c                               | 11 ++--
+ tests/case-22-empty-process-name.bash | 29 +++++++++
+ 3 files changed, 84 insertions(+), 44 deletions(-)
+ create mode 100755 tests/case-22-empty-process-name.bash
+
+diff --git a/dialects/linux/dproc.c b/dialects/linux/dproc.c
+index e2dce74..922db6e 100644
+--- a/dialects/linux/dproc.c
++++ b/dialects/linux/dproc.c
+@@ -339,12 +339,12 @@ gather_proc_info()
+ 		continue;
+ 	    uid = (UID_ARG)sb.st_uid;
+ 	    ht = pidts = 0;
+-	/*
+-	 * Get the PID's command name.
+-	 */
++	    /*
++	     * Get the PID's command name.
++	     */
+ 	    (void) make_proc_path(pidpath, n, &path, &pathl, "stat");
+ 	    if ((prv = read_id_stat(path, pid, &cmd, &ppid, &pgid)) < 0)
+-		cmd = "(unknown)";
++		cmd = NULL; /* NULL means failure to get command name */
+ 
+ #if	defined(HASTASKS)
+ 	/*
+@@ -356,11 +356,16 @@ gather_proc_info()
+ 	 * options work properly.
+ 	 */
+ 	    else if (!IgnTasks && (Selflags & SELTASK)) {
++		/*
++		 * Copy cmd before next call to read_id_stat due to static
++		 * variables
++		 */
+ 		if (cmd) {
+ 		    strncpy(cmdbuf, cmd, sizeof(cmdbuf) - 1);
++		    cmdbuf[sizeof(cmdbuf) - 1] = '\0';
++		    cmd = cmdbuf;
+ 		}
+-		cmdbuf[sizeof(cmdbuf) - 1] = '\0';
+-		cmd = cmdbuf;
++
+ 		(void) make_proc_path(pidpath, n, &taskpath, &taskpathl,
+ 				      "task");
+ 		tx = n + 4;
+@@ -1436,10 +1441,9 @@ compare_mntns(pid)
+  */
+ 
+ static void
+-process_proc_map(p, s, ss)
+-	char *p;			/* path to process maps file */
+-	struct stat *s;			/* executing text file state buffer */
+-	int ss;				/* *s status -- i.e., SB_* values */
++process_proc_map(char *p,			/* path to process maps file */
++	struct stat *s,			/* executing text file state buffer */
++	int ss)				/* *s status -- i.e., SB_* values */
+ {
+ 	char buf[MAXPATHLEN + 1], *ep, fmtbuf[32], **fp, nmabuf[MAXPATHLEN + 1];
+ 	dev_t dev;
+@@ -1705,14 +1709,12 @@ process_proc_map(p, s, ss)
+  *          1 == ID is a zombie
+  *	    2 == ID is a thread
+  */
+-
+ static int
+-read_id_stat(p, id, cmd, ppid, pgid)
+-	char *p;			/* path to status file */
+-	int id;				/* ID: PID or LWP */
+-	char **cmd;			/* malloc'd command name */
+-	int *ppid;			/* returned parent PID for PID type */
+-	int *pgid;			/* returned process group ID for PID
++read_id_stat(char *p,			/* path to status file */
++	int id,				/* ID: PID or LWP */
++	char **cmd,			/* malloc'd command name */
++	int *ppid,			/* returned parent PID for PID type */
++	int *pgid)			/* returned process group ID for PID
+ 					 * type */
+ {
+ 	char buf[MAXPATHLEN], *cp, *cp1, **fp;
+@@ -1757,14 +1759,22 @@ read_id_stat(p, id, cmd, ppid, pgid)
+ 	    goto read_id_stat_exit;
+ 	cp++;
+ 	pc = 1;			/* start the parenthesis balance count at 1 */
+-/*
+- * Enter the command characters safely.  Supply them from the initial read
+- * of the stat file line, a '\n' if the initial read didn't yield a ')'
+- * command closure, or by reading the rest of the command a character at
+- * a time from the stat file.  Count embedded '(' characters and balance
+- * them with embedded ')' characters.  The opening '(' starts the balance
+- * count at one.
+- */
++
++	/* empty process name to avoid leaking previous process name,
++	 * see issue #246
++	 */
++	if (cbf) {
++	    cbf[0] = '\0';
++	}
++
++	/*
++	* Enter the command characters safely.  Supply them from the initial read
++	* of the stat file line, a '\n' if the initial read didn't yield a ')'
++	* command closure, or by reading the rest of the command a character at
++	* a time from the stat file.  Count embedded '(' characters and balance
++	* them with embedded ')' characters.  The opening '(' starts the balance
++	* count at one.
++	*/
+ 	for (cx = es = 0;;) {
+ 	    if (!es)
+ 		ch = *cp++;
+@@ -1776,10 +1786,10 @@ read_id_stat(p, id, cmd, ppid, pgid)
+ 		pc++;
+ 	    if (ch == ')') {
+ 
+-	    /*
+-	     * Balance parentheses when a closure is encountered.  When
+-	     * they are balanced, this is the end of the command.
+-	     */
++		/*
++		* Balance parentheses when a closure is encountered.  When
++		* they are balanced, this is the end of the command.
++		*/
+ 		pc--;
+ 		if (!pc)
+ 		    break;
+@@ -1793,12 +1803,12 @@ read_id_stat(p, id, cmd, ppid, pgid)
+ 		es = 1;		/* Switch to fgetc() when a '\0' appears. */
+ 	}
+ 	*cmd = cbf;
+-/*
+- * Read the remainder of the stat line if it was necessary to read command
+- * characters individually from the stat file.
+- *
+- * Separate the reminder into fields.
+- */
++	/*
++	* Read the remainder of the stat line if it was necessary to read command
++	* characters individually from the stat file.
++	*
++	* Separate the reminder into fields.
++	*/
+ 	if (es)
+ 	    cp = fgets(buf, sizeof(buf), fs);
+ 	(void) fclose(fs);
+@@ -1841,13 +1851,11 @@ read_id_stat(p, id, cmd, ppid, pgid)
+  *	 This function should be used only when links have been successfully
+  *	 resolved in the /proc path by getlinksrc().
+  */
+-
+ static int
+-statEx(p, s, ss)
+-	char *p;			/* file path */
+-	struct stat *s;			/* stat() result -- NULL if none
++statEx(char *p,			/* file path */
++	struct stat *s,			/* stat() result -- NULL if none
+ 					 * wanted */
+-	int *ss;			/* stat() status --  SB_* values */
++	int *ss)			/* stat() status --  SB_* values */
+ {
+ 	static size_t ca = 0;
+ 	static char *cb = NULL;
+diff --git a/print.c b/print.c
+index 3671a69..4b9f14c 100644
+--- a/print.c
++++ b/print.c
+@@ -742,10 +742,13 @@ print_file()
+ 	    (void) printf(" %*s %s\n", NodeColW, NODETTL, NMTTL);
+ 	    Hdr++;
+ 	}
+-/*
+- * Size or print the command.
+- */
+-	cp = (Lp->cmd && *Lp->cmd != '\0') ? Lp->cmd : "(unknown)";
++	/*
++	* Size or print the command.
++	*
++	* CAUTION: command can be empty, see issue #246,
++	* use NULL to represent failure instead of empty string
++	*/
++	cp = Lp->cmd ? Lp->cmd : "(unknown)";
+ 	if (!PrPass) {
+ 	    len = safestrlen(cp, 2);
+ 	    if (CmdLim && (len > CmdLim))
+diff --git a/tests/case-22-empty-process-name.bash b/tests/case-22-empty-process-name.bash
+new file mode 100755
+index 0000000..ce4039c
+--- /dev/null
++++ b/tests/case-22-empty-process-name.bash
+@@ -0,0 +1,29 @@
++#!/bin/bash
++# See https://github.com/lsof-org/lsof/issues/246
++source tests/common.bash
++
++{
++    perl -e '$0 = ""; sleep 999' &
++    pid=$!
++    sleep 1
++
++    output=$($lsof -w -ad cwd -F c -p "$pid")
++    echo "lsof output:" >> $report
++    echo "$output" >> $report
++    kill $pid
++    for entry in $output
++    do
++	if [[ $entry =~ ^p[0-9]+$ ]]; then
++	    if [[ $entry != p$pid ]]; then
++	        echo "Incorrect pid, expect p$pid, got $entry" >> $report
++		exit 1
++	    fi
++	elif [[ $entry =~ c* ]]; then
++	    if [[ $entry != c ]]; then
++	        echo "Process name should be empty, expect c, got $entry" >> $report
++		exit 1
++	    fi
++	fi
++    done
++    exit 0
++} > $report 2>&1
+-- 
+2.27.0
+

lsof.spec

@@ -1,11 +1,16 @@
 Name:		lsof
 Version:	4.97.0
-Release:	1
+Release:	2
 Summary:	A tool for list open files
 License:	Zlib and Sendmail and LGPL-2.0-or-later
 URL:		https://people.freebsd.org/~abe/
 Source0:	https://github.com/lsof-org/%{name}/archive/%{version}.tar.gz#/%{name}-%{version}.tar.gz
 
+Patch1:         backport-Check-if-h_addr-non-null-before-memcpy.patch
+Patch2:         backport-Check-h_addr_list-0-before-accessing-1.patch
+Patch3:         backport-linux-Fix-handling-of-empty-command-name-closing-246.patch
+Patch4:         backport-Fix-empty-process-name-testcase-to-allow-the-dialect.patch
+
 BuildRequires:	gcc libtirpc-devel libselinux-devel
 
 %description
@@ -50,6 +55,9 @@ popd
 %{_mandir}/man*/*
 
 %changelog
+* Thu Mar 23 2023 yixiangzhike <yixiangzhike007@163.cn> - 4.97.0-2
+- backport patches from upstream
+
 * Wed Feb 1 2023 wangjunqi <wangjunqi@kylinos.cn> - 4.97.0-1
 - update version to 4.97.0