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Bug 1994505 - vfs.{read,write,open} stap script produces "Potential type mismatch" warnings
Summary: vfs.{read,write,open} stap script produces "Potential type mismatch" warnings
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: systemtap
Version: 8.4
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Frank Ch. Eigler
QA Contact: Martin Cermak
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-08-17 12:32 UTC by Ramesh Sahoo
Modified: 2022-05-10 14:37 UTC (History)
5 users (show)

Fixed In Version: systemtap-4.6-1.el8
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-05-10 14:10:47 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-93826 0 None None None 2021-08-17 12:33:51 UTC
Red Hat Product Errata RHBA-2022:1890 0 None None None 2022-05-10 14:10:59 UTC

Description Ramesh Sahoo 2021-08-17 12:32:53 UTC 
Description of problem:

The following stap script perfectly works on RHEL7 however it breaks on RHEL8.  

#! /usr/bin/env stap
# Systemtap script to watch read,write,open events on a file. 
# This script must be executed with the inode number of the file as an argument. 
# Execute stat -c "%i" <file_path> to see file indode
 
#
# Run Instructions:
# 	# yum install systemtap
# 	# stap-prep
# 	# stap -v <thiscript.stp> <file_indode_number>
#


probe vfs.{read,write,open}.return
{
  ino = ino
  if (ino == $1){
  printf ("%s file_path(%s) proc_name(%s) uid(%ld) pid(%d) ppid(%d) parent_proc(%s) ppfunc(%s) cmd_line(%s)\n", 
		  ctime(gettimeofday_s()), pathname, execname(), uid(), pid(), ppid(), pexecname(), ppfunc(), cmdline_str())
  printf("Process Trace:\n")
  ts = task_current()
  while (ts->pid !=1 && ts->pid !=0) {
    ts = ts->parent
    printf(" ↓ %ld ('%s')\n", ts->pid, pid2execname(ts->pid))
    }
  printf("\n")
  }
}


Output from RHEL7:
Tue Aug 17 07:31:53 2021 file_path(/tmp/file1.txt) proc_name(cat) uid(100084) pid(10439) ppid(26535) parent_proc(bash) ppfunc(vfs_read) cmd_line(cat /tmp/file1.txt)
Process Trace:
↓ 26535 ('bash')
↓ 26090 ('terminator')
↓ 3560 ('gnome-shell')
↓ 3375 ('gnome-session-b')
↓ 3332 ('gdm-session-wor')
↓ 2219 ('gdm')
↓ 1 ('systemd')


Failed Output from RHEL8:

[root@localhost ~]# stap -v file_watch.stp 102228751
Pass 1: parsed user script and 484 library scripts using 268276virt/109956res/12004shr/97544data kb, in 270usr/30sys/309real ms.
WARNING: cannot find module kernel debuginfo: No DWARF information found [man warning::debuginfo]
semantic error: resolution failed in DWARF builder

semantic error: resolution failed in DWARF builder

semantic error: while resolving probe point: identifier 'kernel' at /usr/share/systemtap/tapset/linux/vfs.stp:991:25
        source: probe vfs.read.return = kernel.function("vfs_read").return
                                        ^

semantic error: no match

semantic error: resolution failed in alias expansion builder

WARNING: cannot find module kernel debuginfo: No DWARF information found [man warning::debuginfo]
semantic error: resolution failed in DWARF builder

semantic error: resolution failed in alias expansion builder

WARNING: cannot find module kernel debuginfo: No DWARF information found [man warning::debuginfo]
semantic error: resolution failed in alias expansion builder



Version-Release number of selected component (if applicable):
systemtap-4.4-11.el8_4.x86_64
Comment 1 Frank Ch. Eigler 2021-08-17 12:46:36 UTC 
The messages point to this man page:

% man warning::debuginfo

which contains information about how to deal with missing debuginfo.  The simplest thing to do here may be:

# sudo stap-prep

Please let us know how things work after the needed debuginfo is installed.  (If inside RH, there is a debuginfod server that systemtap can use to download this stuff for itself.)
Comment 2 Ramesh Sahoo 2021-08-17 13:27:50 UTC 
Hello Frank,

Thanks, I got that working but there are several warnings. Anyway to avoid these warnings? 

[root@localhost ~]# stap -v file_watch.stp 102228763
Pass 1: parsed user script and 484 library scripts using 268276virt/110052res/12104shr/97544data kb, in 280usr/30sys/312real ms.
WARNING: Potential type mismatch in reassignment: identifier 'root_dentry' at /usr/share/systemtap/tapset/linux/dentry.stp:246:3
 source: 		root_dentry = @cast(task, "task_struct", "kernel")->fs->root->dentry
         		^
WARNING: Potential type mismatch in reassignment: identifier 'root_dentry' at :246:3
 source: 		root_dentry = @cast(task, "task_struct", "kernel")->fs->root->dentry
         		^
WARNING: Potential type mismatch in reassignment: identifier 'root_dentry' at :246:3
 source: 		root_dentry = @cast(task, "task_struct", "kernel")->fs->root->dentry
         		^
WARNING: Potential type mismatch in reassignment: identifier 'root_dentry' at :242:3
 source: 		root_dentry = & @cast(task, "task_struct", "kernel")->fs->root
         		^
WARNING: Potential type mismatch in reassignment: identifier 'root_dentry' at :242:3
 source: 		root_dentry = & @cast(task, "task_struct", "kernel")->fs->root
         		^
WARNING: Potential type mismatch in reassignment: identifier 'root_dentry' at :242:3
 source: 		root_dentry = & @cast(task, "task_struct", "kernel")->fs->root
         		^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :268:6
 source: 					dentry = mnt->mnt_mountpoint
         					^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :269:6
 source: 					vfsmnt = & mnt->mnt_parent->mnt
         					^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :290:27
 source: 		name = __dentry_prepend(dentry, name)
         		                        ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :291:3
 source: 		dentry = dentry->d_parent
         		^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :291:12
 source: 		dentry = dentry->d_parent
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :268:6
 source: 					dentry = mnt->mnt_mountpoint
         					^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :269:6
 source: 					vfsmnt = & mnt->mnt_parent->mnt
         					^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :290:27
 source: 		name = __dentry_prepend(dentry, name)
         		                        ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :291:3
 source: 		dentry = dentry->d_parent
         		^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :291:12
 source: 		dentry = dentry->d_parent
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :268:6
 source: 					dentry = mnt->mnt_mountpoint
         					^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :269:6
 source: 					vfsmnt = & mnt->mnt_parent->mnt
         					^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :290:27
 source: 		name = __dentry_prepend(dentry, name)
         		                        ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :291:3
 source: 		dentry = dentry->d_parent
         		^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :291:12
 source: 		dentry = dentry->d_parent
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :212:2
 source: 	dentry = & @cast(dentry, "dentry", "kernel")
         	^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :212:19
 source: 	dentry = & @cast(dentry, "dentry", "kernel")
         	                 ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :213:2
 source: 	vfsmnt = & @cast(vfsmnt, "vfsmount", "kernel")
         	^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :213:19
 source: 	vfsmnt = & @cast(vfsmnt, "vfsmount", "kernel")
         	                 ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :216:9
 source: 	    && dentry->d_op && dentry->d_op->d_dname
         	       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :216:25
 source: 	    && dentry->d_op && dentry->d_op->d_dname
         	                       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :217:28
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                          ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :217:39
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                                     ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :217:49
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :222:7
 source: 		if (vfsmnt->mnt_sb->s_magic == @const("SOCKFS_MAGIC")) {
         		    ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :223:35
 source: 			return sprintf("socket:[%lu]", dentry->d_inode->i_ino)
         			                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :225:12
 source: 		else if (vfsmnt->mnt_sb->s_magic == @const("PIPEFS_MAGIC")) {
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :226:33
 source: 			return sprintf("pipe:[%lu]", dentry->d_inode->i_ino)
         			                             ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :228:12
 source: 		else if (vfsmnt->mnt_sb->s_magic
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :230:43
 source: 			return sprintf("ANON_INODE:%s", d_name(dentry))
         			                                       ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :232:12
 source: 		else if (vfsmnt->mnt_sb->s_magic == @const("NSFS_MAGIC")) {
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :233:20
 source: 			ns_ops = &@cast(dentry->d_fsdata, "proc_ns_operations", "kernel")
         			                ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :235:12
 source: 				       dentry->d_inode->i_ino)
         				       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :237:34
 source: 		return sprintf("UNKNOWN:[%p]", dentry)
         		                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :251:27
 source: 		mnt = &@cast(real_mount(vfsmnt), "mount", "kernel")
         		                        ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :257:9
 source: 	while (dentry != root_dentry || vfsmnt == root_vfsmnt) {
         	       ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :257:34
 source: 	while (dentry != root_dentry || vfsmnt == root_vfsmnt) {
         	                                ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :258:7
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		    ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :258:17
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		              ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :258:54
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		                                                   ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :260:8
 source: 			if (dentry != vfsmnt->mnt_root) {
         			    ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :260:18
 source: 			if (dentry != vfsmnt->mnt_root) {
         			              ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :212:2
 source: 	dentry = & @cast(dentry, "dentry", "kernel")
         	^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :212:19
 source: 	dentry = & @cast(dentry, "dentry", "kernel")
         	                 ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :213:2
 source: 	vfsmnt = & @cast(vfsmnt, "vfsmount", "kernel")
         	^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :213:19
 source: 	vfsmnt = & @cast(vfsmnt, "vfsmount", "kernel")
         	                 ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :216:9
 source: 	    && dentry->d_op && dentry->d_op->d_dname
         	       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :216:25
 source: 	    && dentry->d_op && dentry->d_op->d_dname
         	                       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :217:28
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                          ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :217:39
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                                     ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :217:49
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :222:7
 source: 		if (vfsmnt->mnt_sb->s_magic == @const("SOCKFS_MAGIC")) {
         		    ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :223:35
 source: 			return sprintf("socket:[%lu]", dentry->d_inode->i_ino)
         			                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :225:12
 source: 		else if (vfsmnt->mnt_sb->s_magic == @const("PIPEFS_MAGIC")) {
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :226:33
 source: 			return sprintf("pipe:[%lu]", dentry->d_inode->i_ino)
         			                             ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :228:12
 source: 		else if (vfsmnt->mnt_sb->s_magic
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :230:43
 source: 			return sprintf("ANON_INODE:%s", d_name(dentry))
         			                                       ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :232:12
 source: 		else if (vfsmnt->mnt_sb->s_magic == @const("NSFS_MAGIC")) {
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :233:20
 source: 			ns_ops = &@cast(dentry->d_fsdata, "proc_ns_operations", "kernel")
         			                ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :235:12
 source: 				       dentry->d_inode->i_ino)
         				       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :237:34
 source: 		return sprintf("UNKNOWN:[%p]", dentry)
         		                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :251:27
 source: 		mnt = &@cast(real_mount(vfsmnt), "mount", "kernel")
         		                        ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :257:9
 source: 	while (dentry != root_dentry || vfsmnt == root_vfsmnt) {
         	       ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :257:34
 source: 	while (dentry != root_dentry || vfsmnt == root_vfsmnt) {
         	                                ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :258:7
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		    ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :258:17
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		              ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :258:54
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		                                                   ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :260:8
 source: 			if (dentry != vfsmnt->mnt_root) {
         			    ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :260:18
 source: 			if (dentry != vfsmnt->mnt_root) {
         			              ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :212:2
 source: 	dentry = & @cast(dentry, "dentry", "kernel")
         	^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :212:19
 source: 	dentry = & @cast(dentry, "dentry", "kernel")
         	                 ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :213:2
 source: 	vfsmnt = & @cast(vfsmnt, "vfsmount", "kernel")
         	^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :213:19
 source: 	vfsmnt = & @cast(vfsmnt, "vfsmount", "kernel")
         	                 ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :216:9
 source: 	    && dentry->d_op && dentry->d_op->d_dname
         	       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :216:25
 source: 	    && dentry->d_op && dentry->d_op->d_dname
         	                       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :217:28
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                          ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :217:39
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                                     ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :217:49
 source: 	    && (!__dentry_IS_ROOT(dentry) || dentry != vfsmnt->mnt_root)) {
         	                                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :222:7
 source: 		if (vfsmnt->mnt_sb->s_magic == @const("SOCKFS_MAGIC")) {
         		    ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :223:35
 source: 			return sprintf("socket:[%lu]", dentry->d_inode->i_ino)
         			                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :225:12
 source: 		else if (vfsmnt->mnt_sb->s_magic == @const("PIPEFS_MAGIC")) {
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :226:33
 source: 			return sprintf("pipe:[%lu]", dentry->d_inode->i_ino)
         			                             ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :228:12
 source: 		else if (vfsmnt->mnt_sb->s_magic
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :230:43
 source: 			return sprintf("ANON_INODE:%s", d_name(dentry))
         			                                       ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :232:12
 source: 		else if (vfsmnt->mnt_sb->s_magic == @const("NSFS_MAGIC")) {
         		         ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :233:20
 source: 			ns_ops = &@cast(dentry->d_fsdata, "proc_ns_operations", "kernel")
         			                ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :235:12
 source: 				       dentry->d_inode->i_ino)
         				       ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :237:34
 source: 		return sprintf("UNKNOWN:[%p]", dentry)
         		                               ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :251:27
 source: 		mnt = &@cast(real_mount(vfsmnt), "mount", "kernel")
         		                        ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :257:9
 source: 	while (dentry != root_dentry || vfsmnt == root_vfsmnt) {
         	       ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :257:34
 source: 	while (dentry != root_dentry || vfsmnt == root_vfsmnt) {
         	                                ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :258:7
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		    ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :258:17
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		              ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :258:54
 source: 		if (dentry == vfsmnt->mnt_root || __dentry_IS_ROOT(dentry)) {
         		                                                   ^
WARNING: Potential type mismatch in reassignment: identifier 'dentry' at :260:8
 source: 			if (dentry != vfsmnt->mnt_root) {
         			    ^
WARNING: Potential type mismatch in reassignment: identifier 'vfsmnt' at :260:18
 source: 			if (dentry != vfsmnt->mnt_root) {
         			              ^
Pass 2: analyzed script: 6 probes, 64 functions, 9 embeds, 38 globals using 479080virt/322500res/13800shr/308348data kb, in 2670usr/380sys/3055real ms.
Pass 3: translated to C into "/tmp/stapLResKt/stap_e1576cc8e2e33e12298b404b13ba64b9_42821_src.c" using 479080virt/322692res/13992shr/308348data kb, in 40usr/70sys/107real ms.
Pass 4: compiled C into "stap_e1576cc8e2e33e12298b404b13ba64b9_42821.ko" in 4880usr/700sys/5031real ms.
Pass 5: starting run.


Tue Aug 17 13:25:15 2021 file_path(/tmp/anaconda.log) proc_name(cat) uid(0) pid(78200) ppid(78114) parent_proc(bash) ppfunc(vfs_read) cmd_line(cat /tmp/anaconda.log)
Process Trace:
 ↓ 78114 ('bash')
 ↓ 78107 ('sshd')
 ↓ 78100 ('sshd')
 ↓ 1168 ('sshd')
 ↓ 1 ('systemd')

Tue Aug 17 13:25:15 2021 file_path(/tmp/anaconda.log) proc_name(cat) uid(0) pid(78200) ppid(78114) parent_proc(bash) ppfunc(vfs_read) cmd_line(cat /tmp/anaconda.log)
Process Trace:
 ↓ 78114 ('bash')
 ↓ 78107 ('sshd')
 ↓ 78100 ('sshd')
 ↓ 1168 ('sshd')
 ↓ 1 ('systemd')
Comment 3 Frank Ch. Eigler 2021-08-17 13:32:33 UTC 
Yeah, that warning is annoying.  Use "stap -w ..." to suppress it until we can get rid of it.  Will retarget this BZ toward that end.
Comment 4 Frank Ch. Eigler 2021-10-25 16:30:52 UTC 
While we're still aiming to get this done during the 8.6 timeframe, but unsetting flags to stop making it look like there is a firm commitment.
Comment 5 Frank Ch. Eigler 2021-11-03 01:53:26 UTC 
upstream commit a11d8a296ba4 should roll into the upcoming rebase
Comment 7 Martin Cermak 2021-12-03 08:58:40 UTC 
Verified with systemtap-4.6-2.el8 and systemtap-4.6-1.el9
Comment 8 Martin Cermak 2021-12-03 09:28:23 UTC 
(In reply to Martin Cermak from comment #7)
> Verified with systemtap-4.6-2.el8 and systemtap-4.6-1.el9

And with systemtap-4.6-3.el9 too.
Comment 11 errata-xmlrpc 2022-05-10 14:10:47 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (systemtap bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:1890
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