mount: improve --all documentation

- libblkid: Fix probe_ioctl_tp assigning BLKGETDISKSEQ as physical
- libblkid: use snprintf() instead of sprintf()

Resolves: RHEL-119786 RHEL-121120 RHEL-123170

0016-mount-improve-all-documentation.patch

@@ -0,0 +1,43 @@
+From 7e8aba77423013481fa2965ad80c7fe7aece8497 Mon Sep 17 00:00:00 2001
+From: Karel Zak <kzak@redhat.com>
+Date: Wed, 22 Oct 2025 10:53:15 +0200
+Subject: mount: improve --all documentation
+
+Add notes to the --all option description:
+- Historical context: mount -a was originally designed for init scripts
+- Modern usage: systemd-based distributions use systemd units instead
+- Swap handling: swap entries in fstab are silently ignored, use swapon -a
+
+Addresses: https://issues.redhat.com/browse/RHEL-119786
+Signed-off-by: Karel Zak <kzak@redhat.com>
+---
+ sys-utils/mount.8.adoc | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/sys-utils/mount.8.adoc b/sys-utils/mount.8.adoc
+index ba8b45a2a..de2461f8a 100644
+--- a/sys-utils/mount.8.adoc
++++ b/sys-utils/mount.8.adoc
+@@ -303,7 +303,9 @@ The *mount* command does not pass all command-line options to the **/sbin/mount.
+ Command-line options available for the *mount* command are:
+ 
+ *-a*, *--all*::
+-Mount all filesystems (of the given types) mentioned in _fstab_ (except for those whose line contains the *noauto* keyword). The filesystems are mounted following their order in _fstab_. The *mount* command compares filesystem source, target (and fs root for bind mount or btrfs) to detect already mounted filesystems. The kernel table with already mounted filesystems is cached during *mount --all*. This means that all duplicated _fstab_ entries will be mounted.
++Mount all filesystems (of the given types) mentioned in _fstab_ (except for those whose line contains the *noauto* keyword). This option was originally designed for use in init scripts. Note that many modern systemd-based distributions do not use *mount -a* on boot and instead mount filesystems in a more sophisticated way using systemd units.
+++
++The filesystems are mounted following their order in _fstab_. The *mount* command compares filesystem source, target (and fs root for bind mount or btrfs) to detect already mounted filesystems. The kernel table with already mounted filesystems is cached during *mount --all*. This means that all duplicated _fstab_ entries will be mounted.
+ +
+ The correct functionality depends on _/proc_ (to detect already mounted filesystems) and on _/sys_ (to evaluate filesystem tags like UUID= or LABEL=). It's strongly recommended to mount _/proc_ and _/sys_ filesystems before *mount -a* is executed, or keep /proc and /sys at the beginning of _fstab_.
+ +
+@@ -311,6 +313,8 @@ The option *--all* is possible to use for remount operation too. In this case al
+ +
+ Since version 2.35 it is possible to use the command line option *-o* to alter mount options from _fstab_ (see also *--options-mode*).
+ +
++Note that swap entries in _fstab_ are silently ignored by *mount -a*. Use *swapon -a* to enable swap devices and files. See *swapon*(8).
+++
+ Note that it is a bad practice to use *mount -a* for _fstab_ checking. The recommended solution is *findmnt --verify*.
+ 
+ *-B*, *--bind*::
+-- 
+2.51.0
+

0017-libblkid-Fix-probe_ioctl_tp-assigning-BLKGETDISKSEQ-.patch

@@ -0,0 +1,53 @@
+From 9121e301959fb977642c1bab81525fed08629c1c Mon Sep 17 00:00:00 2001
+From: Sam Fink <fsamuel@netapp.com>
+Date: Wed, 17 Sep 2025 10:04:51 -0400
+Subject: libblkid: Fix probe_ioctl_tp assigning BLKGETDISKSEQ as physical
+ sector size
+
+Fix issue introduced by PR#2908 in probe_ioctl_tp where the BLKGETDISKSEQ ioctl
+result is incorrectly assigned to the topology with
+blkid_topology_set_physical_sector_size instead of blkid_topology_set_diskseq.
+
+This issue was observed while using a Debian 13 container on a RHEL 9.4 host
+attempting to format a volume. The physical sector size was incorrectly
+reported as 3. This issue also presents with the fdisk command,
+which also uses this library to resolve physical sector size of devices.
+
+Example fdisk output:
+root@r94p121-PA:~ # fdisk --list /dev/sdb
+Disk /dev/sdb: 90 GiB, 96636764160 bytes, 188743680 sectors
+Units: sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 3 bytes
+I/O size (minimum/optimal): 512 bytes / 3 bytes
+
+Strace of relevant ioctls:
+ioctl(3, BLKALIGNOFF, [0])              = 0
+ioctl(3, BLKIOMIN, [512])               = 0
+ioctl(3, BLKIOOPT, [0])                 = 0
+ioctl(3, BLKPBSZGET, [512])             = 0
+ioctl(3, BLKGETDISKSEQ, [3])            = 0
+ioctl(3, BLKSSZGET, [512])              = 0
+
+Addresses: https://issues.redhat.com/browse/RHEL-123170
+
+(cherry picked from commit 6fbde1c7db838e22b109e2e58eaa51b086758bc6)
+---
+ libblkid/src/topology/ioctl.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libblkid/src/topology/ioctl.c b/libblkid/src/topology/ioctl.c
+index 7b15c9e9a..e95d67739 100644
+--- a/libblkid/src/topology/ioctl.c
++++ b/libblkid/src/topology/ioctl.c
+@@ -46,7 +46,7 @@ static int probe_ioctl_tp(blkid_probe pr,
+ 
+ 	if (ioctl(pr->fd, BLKGETDISKSEQ, &u64) == -1)
+ 		return 1;
+-	if (blkid_topology_set_physical_sector_size(pr, u64))
++	if (blkid_topology_set_diskseq(pr, u64))
+ 		return -1;
+ 
+ 	return 0;
+-- 
+2.51.0
+

0018-libblkid-use-snprintf-instead-of-sprintf.patch

@@ -0,0 +1,59 @@
+From e00af23ce51151a5a2e7b207dbe8d1bc715e4bd1 Mon Sep 17 00:00:00 2001
+From: Karel Zak <kzak@redhat.com>
+Date: Mon, 6 Oct 2025 15:04:24 +0200
+Subject: libblkid: use snprintf() instead of sprintf()
+
+Replace sprintf() calls with snprintf() to ensure proper bounds
+checking when formatting strings.
+
+In encode.c, the check now validates snprintf() return value instead
+of pre-checking buffer size, providing more robust error handling.
+
+In probe.c, snprintf() is used with proper size calculation based on
+remaining buffer space.
+
+Addresses: https://issues.redhat.com/browse/RHEL-121120
+
+Signed-off-by: Karel Zak <kzak@redhat.com>
+(cherry picked from commit 041380f4ca7244df624bf7efdb5e27fdd3144175)
+---
+ libblkid/src/encode.c | 6 ++++--
+ libblkid/src/probe.c  | 4 ++--
+ 2 files changed, 6 insertions(+), 4 deletions(-)
+
+diff --git a/libblkid/src/encode.c b/libblkid/src/encode.c
+index 8213873ee..4b83f6690 100644
+--- a/libblkid/src/encode.c
++++ b/libblkid/src/encode.c
+@@ -191,9 +191,11 @@ int blkid_encode_string(const char *str, char *str_enc, size_t len)
+ 			j += seqlen;
+ 			i += (seqlen-1);
+ 		} else if (str[i] == '\\' || !is_whitelisted(str[i], NULL)) {
+-			if (len-j < 4)
++			int rc;
++
++			rc = snprintf(&str_enc[j], len-j, "\\x%02x", (unsigned char) str[i]);
++			if (rc != 4)
+ 				goto err;
+-			sprintf(&str_enc[j], "\\x%02x", (unsigned char) str[i]);
+ 			j += 4;
+ 		} else {
+ 			if (len-j < 1)
+diff --git a/libblkid/src/probe.c b/libblkid/src/probe.c
+index 76905e197..cd45bcdf7 100644
+--- a/libblkid/src/probe.c
++++ b/libblkid/src/probe.c
+@@ -1972,8 +1972,8 @@ static void blkid_probe_log_csum_mismatch(blkid_probe pr, size_t n, const void *
+ 	int hex_size = min(sizeof(csum_hex), n * 2);
+ 
+ 	for (int i = 0; i < hex_size; i+=2) {
+-		sprintf(&csum_hex[i], "%02X", ((const unsigned char *) csum)[i / 2]);
+-		sprintf(&expected_hex[i], "%02X", ((const unsigned char *) expected)[i / 2]);
++		snprintf(&csum_hex[i], sizeof(csum_hex) - i, "%02X", ((const unsigned char *) csum)[i / 2]);
++		snprintf(&expected_hex[i], sizeof(expected_hex) - i, "%02X", ((const unsigned char *) expected)[i / 2]);
+ 	}
+ 
+ 	ul_debug(
+-- 
+2.51.0
+

util-linux.spec

@@ -128,6 +128,13 @@ Patch13: 0013-libfdisk-improve-collision-reporting.patch
 Patch14: 0014-libfdisk-dos-ignore-incomplete-EBR-for-non-wholedisk.patch
 # RHEL- - wall: always use utmp as fallback
 Patch15: 0015-wall-always-use-utmp-as-fallback.patch
+# RHEL-119786 - mount: improve --all documentation
+Patch16: 0016-mount-improve-all-documentation.patch
+# RHEL-123170 - libblkid: Fix probe_ioctl_tp assigning BLKGETDISKSEQ as physical
+Patch17: 0017-libblkid-Fix-probe_ioctl_tp-assigning-BLKGETDISKSEQ-.patch
+# RHEL-121120 - libblkid: use snprintf() instead of sprintf()
+Patch18: 0018-libblkid-use-snprintf-instead-of-sprintf.patch
+
 
 %description
 The util-linux package contains a large variety of low-level system