* Re: [syzbot] [audit?] BUG: unable to handle kernel paging request in integrity_audit_message [not found] <6a8f89e5.1d9ded08.62e62.00bf.GAE@google.com> @ 2026-08-29 18:12 ` syzbot 2026-08-29 18:22 ` Bradley Morgan 0 siblings, 1 reply; 3+ messages in thread From: syzbot @ 2026-08-29 18:12 UTC (permalink / raw) To: audit, brads, eparis, linux-integrity, linux-kernel, linux-security-module, paul, roberto.sassu, stable, syzkaller-bugs, zohar syzbot has found a reproducer for the following issue on: HEAD commit: cf72cbb39da8 Merge tag 'io_uring-7.3-20260828' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16e7cc15580000 kernel config: https://syzkaller.appspot.com/x/.config?x=85bc5cc2fc7394d9 dashboard link: https://syzkaller.appspot.com/bug?extid=5ebeb3089ea6439c37be compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=159ebd79580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123d1d79580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-cf72cbb3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/755d053ff703/vmlinux-cf72cbb3.xz kernel image: https://storage.googleapis.com/syzbot-assets/0837738ba281/bzImage-cf72cbb3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffffffffffffffdc #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD eb99067 P4D eb99067 PUD eb9b067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5921 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 RSP: 0018:ffffc90002eb7920 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9 R10: 00000000000006c0 R11: 0000000000000001 R12: ffff888027be0e40 R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc FS: 0000000000000000(0000) GS:ffff888096967000(0063) knlGS:000000005783f480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffffffffffffdc CR3: 0000000055e55000 CR4: 0000000000352ef0 Call Trace: <TASK> __fortify_strlen include/linux/fortify-string.h:218 [inline] audit_log_untrustedstring+0x19/0x30 kernel/audit.c:2203 integrity_audit_message+0x366/0x4f0 security/integrity/integrity_audit.c:60 integrity_audit_msg+0x41/0x60 security/integrity/integrity_audit.c:32 validate_hash_algo security/integrity/ima/ima_appraise.c:752 [inline] ima_inode_setxattr+0x512/0x5f0 security/integrity/ima/ima_appraise.c:775 security_inode_setxattr+0x299/0x560 security/security.c:1940 __vfs_setxattr_locked+0xad/0x2b0 fs/xattr.c:309 vfs_setxattr+0x14a/0x390 fs/xattr.c:344 do_setxattr+0x145/0x180 fs/xattr.c:662 file_setxattr fs/xattr.c:672 [inline] file_setxattr+0x139/0x1b0 fs/xattr.c:666 path_setxattrat+0x335/0x3b0 fs/xattr.c:732 __do_sys_fsetxattr fs/xattr.c:782 [inline] __se_sys_fsetxattr fs/xattr.c:779 [inline] __ia32_sys_fsetxattr+0xc4/0x140 fs/xattr.c:779 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fb7fec Code: Unable to access opcode bytes at 0xf7fb7fc2. RSP: 002b:00000000fffd97bc EFLAGS: 00000296 ORIG_RAX: 00000000000000e4 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000080 RDX: 0000000080001080 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: CR2: ffffffffffffffdc ---[ end trace 0000000000000000 ]--- RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 RSP: 0018:ffffc90002eb7920 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9 R10: 00000000000006c0 R11: 0000000000000001 R12: ffff888027be0e40 R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc FS: 0000000000000000(0000) GS:ffff888096967000(0063) knlGS:000000005783f480 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7fb8000 CR3: 0000000055e55000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 fc add %bh,%ah 6: ff lcall (bad) 7: df 55 48 fists 0x48(%rbp) a: 89 fa mov %edi,%edx c: 48 89 fd mov %rdi,%rbp f: 53 push %rbx 10: 48 c1 ea 03 shr $0x3,%rdx 14: 48 83 ec 08 sub $0x8,%rsp 18: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax 1c: 48 89 fa mov %rdi,%rdx 1f: 83 e2 07 and $0x7,%edx 22: 38 d0 cmp %dl,%al 24: 7f 04 jg 0x2a 26: 84 c0 test %al,%al 28: 75 50 jne 0x7a * 2a: 80 7d 00 00 cmpb $0x0,0x0(%rbp) <-- trapping instruction 2e: 74 3d je 0x6d 30: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 37: fc ff df 3a: 48 89 e8 mov %rbp,%rax 3d: 48 rex.W 3e: 83 .byte 0x83 3f: c0 .byte 0xc0 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] [audit?] BUG: unable to handle kernel paging request in integrity_audit_message 2026-08-29 18:12 ` [syzbot] [audit?] BUG: unable to handle kernel paging request in integrity_audit_message syzbot @ 2026-08-29 18:22 ` Bradley Morgan 2026-08-29 18:27 ` syzbot 0 siblings, 1 reply; 3+ messages in thread From: Bradley Morgan @ 2026-08-29 18:22 UTC (permalink / raw) To: syzbot, audit, eparis, linux-integrity, linux-kernel, linux-security-module, paul, roberto.sassu, stable, syzkaller-bugs, zohar On 29 August 2026 19:12:29 BST, syzbot <syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com> wrote: >syzbot has found a reproducer for the following issue on: > #syz test: dentry_path() returns ERR_PTR(-ENAMETOOLONG) when the path exceeds the buffer. validate_hash_algo() passes the result straight to integrity_audit_msg() without checking. ERR_PTR is not NULL, so integrity_audit_message() sees a valid pointer and calls strlen() on it, which faults: BUG: unable to handle page fault for address: ffffffffffffffdc RIP: 0010:strlen+0x30/0xa0 Call Trace: audit_log_untrustedstring+0x19/0x30 integrity_audit_message+0x366/0x4f0 ima_inode_setxattr+0x512/0x5f0 Check for IS_ERR() and use NULL instead, which makes the audit message skip the name= field instead of crashing. Fixes: 4f2946aa0c45 ("IMA: introduce a new policy option func=SETXATTR_CHECK") Cc: stable@vger.kernel.org Reported-by: syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com Link: https://lore.kernel.org/all/6a8f89e5.1d9ded08.62e62.00bf.GAE@google.com/ Signed-off-by: Bradley Morgan <brads@mainlining.org> security/integrity/ima/ima_appraise.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index ced2e131b061..b280488e15fc 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -748,6 +748,8 @@ static int validate_hash_algo(struct dentry *dentry, return -EACCES; path = dentry_path(dentry, pathbuf, PATH_MAX); + if (IS_ERR(path)) + path = NULL; integrity_audit_msg(AUDIT_INTEGRITY_DATA, d_inode(dentry), path, "set_data", errmsg, -EACCES, 0); -- 2.47.3 >HEAD commit: cf72cbb39da8 Merge tag 'io_uring-7.3-20260828' of >git://gi.. >git tree: upstream >console output: https://syzkaller.appspot.com/x/log.txt?x=16e7cc15580000 >kernel config: https://syzkaller.appspot.com/x/.config?x=85bc5cc2fc7394d9 >dashboard link: >https://syzkaller.appspot.com/bug?extid=5ebeb3089ea6439c37be >compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 >userspace arch: i386 >syz repro: https://syzkaller.appspot.com/x/repro.syz?x=159ebd79580000 >C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123d1d79580000 > >Downloadable assets: >disk image (non-bootable): >https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-cf72cbb3.raw.xz >vmlinux: https://storage.googleapis.com/syzbot-assets/755d053ff703/vmlinux-cf72cbb3.xz >kernel image: >https://storage.googleapis.com/syzbot-assets/0837738ba281/bzImage-cf72cbb3.xz > >IMPORTANT: if you fix the issue, please add the following tag to the commit: >Reported-by: syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com > >BUG: unable to handle page fault for address: ffffffffffffffdc >#PF: supervisor read access in kernel mode >#PF: error_code(0x0000) - not-present page >PGD eb99067 P4D eb99067 PUD eb9b067 PMD 0 >Oops: Oops: 0000 [#1] SMP KASAN NOPTI >CPU: 0 UID: 0 PID: 5921 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) >Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS >1.16.3-debian-1.16.3-2 04/01/2014 >RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 >Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 >RSP: 0018:ffffc90002eb7920 EFLAGS: 00010246 >RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 >RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc >RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9 >R10: 00000000000006c0 R11: 0000000000000001 R12: ffff888027be0e40 >R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc >FS: 0000000000000000(0000) GS:ffff888096967000(0063) knlGS:000000005783f480 >CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 >CR2: ffffffffffffffdc CR3: 0000000055e55000 CR4: 0000000000352ef0 >Call Trace: > <TASK> > __fortify_strlen include/linux/fortify-string.h:218 [inline] > audit_log_untrustedstring+0x19/0x30 kernel/audit.c:2203 > integrity_audit_message+0x366/0x4f0 > security/integrity/integrity_audit.c:60 > integrity_audit_msg+0x41/0x60 security/integrity/integrity_audit.c:32 > validate_hash_algo security/integrity/ima/ima_appraise.c:752 [inline] > ima_inode_setxattr+0x512/0x5f0 security/integrity/ima/ima_appraise.c:775 > security_inode_setxattr+0x299/0x560 security/security.c:1940 > __vfs_setxattr_locked+0xad/0x2b0 fs/xattr.c:309 > vfs_setxattr+0x14a/0x390 fs/xattr.c:344 > do_setxattr+0x145/0x180 fs/xattr.c:662 > file_setxattr fs/xattr.c:672 [inline] > file_setxattr+0x139/0x1b0 fs/xattr.c:666 > path_setxattrat+0x335/0x3b0 fs/xattr.c:732 > __do_sys_fsetxattr fs/xattr.c:782 [inline] > __se_sys_fsetxattr fs/xattr.c:779 [inline] > __ia32_sys_fsetxattr+0xc4/0x140 fs/xattr.c:779 > do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] > __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291 > do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316 > entry_SYSENTER_compat_after_hwframe+0x84/0x8e >RIP: 0023:0xf7fb7fec >Code: Unable to access opcode bytes at 0xf7fb7fc2. >RSP: 002b:00000000fffd97bc EFLAGS: 00000296 ORIG_RAX: 00000000000000e4 >RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000080 >RDX: 0000000080001080 RSI: 0000000000000002 RDI: 0000000000000000 >RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 >R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 >R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > </TASK> >Modules linked in: >CR2: ffffffffffffffdc >---[ end trace 0000000000000000 ]--- >RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 >Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 >RSP: 0018:ffffc90002eb7920 EFLAGS: 00010246 >RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 >RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc >RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9 >R10: 00000000000006c0 R11: 0000000000000001 R12: ffff888027be0e40 >R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc >FS: 0000000000000000(0000) GS:ffff888096967000(0063) knlGS:000000005783f480 >CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 >CR2: 00000000f7fb8000 CR3: 0000000055e55000 CR4: 0000000000352ef0 >---------------- >Code disassembly (best guess): > 0: 00 00 add %al,(%rax) > 2: 00 00 add %al,(%rax) > 4: 00 fc add %bh,%ah > 6: ff lcall (bad) > 7: df 55 48 fists 0x48(%rbp) > a: 89 fa mov %edi,%edx > c: 48 89 fd mov %rdi,%rbp > f: 53 push %rbx > 10: 48 c1 ea 03 shr $0x3,%rdx > 14: 48 83 ec 08 sub $0x8,%rsp > 18: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax > 1c: 48 89 fa mov %rdi,%rdx > 1f: 83 e2 07 and $0x7,%edx > 22: 38 d0 cmp %dl,%al > 24: 7f 04 jg 0x2a > 26: 84 c0 test %al,%al > 28: 75 50 jne 0x7a >* 2a: 80 7d 00 00 cmpb $0x0,0x0(%rbp) <-- trapping instruction > 2e: 74 3d je 0x6d > 30: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx > 37: fc ff df > 3a: 48 89 e8 mov %rbp,%rax > 3d: 48 rex.W > 3e: 83 .byte 0x83 > 3f: c0 .byte 0xc0 > > >--- >If you want syzbot to run the reproducer, reply with: >#syz test: git://repo/address.git branch-or-commit-hash >If you attach or paste a git patch, syzbot will apply it before testing. > --- Thanks! https://lore.kernel.org/all/EE579805-42F2-4C58-B752-F28779EEB717@grrlz.net/ ^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [syzbot] [audit?] BUG: unable to handle kernel paging request in integrity_audit_message 2026-08-29 18:22 ` Bradley Morgan @ 2026-08-29 18:27 ` syzbot 0 siblings, 0 replies; 3+ messages in thread From: syzbot @ 2026-08-29 18:27 UTC (permalink / raw) To: brads Cc: audit, brads, eparis, linux-integrity, linux-kernel, linux-security-module, paul, roberto.sassu, stable, syzkaller-bugs, zohar > On 29 August 2026 19:12:29 BST, syzbot > <syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com> wrote: >>syzbot has found a reproducer for the following issue on: >> > > #syz test: dentry_path() returns ERR_PTR(-ENAMETOOLONG) when the path I've failed to parse your command. Did you perhaps forget to provide the branch name, or added an extra ':'? Please use one of the two supported formats: 1. #syz test 2. #syz test: repo branch-or-commit-hash Note the lack of ':' in option 1. > exceeds the > buffer. validate_hash_algo() passes the result straight to > integrity_audit_msg() without checking. ERR_PTR is not NULL, so > integrity_audit_message() sees a valid pointer and calls strlen() on > it, which faults: > > BUG: unable to handle page fault for address: ffffffffffffffdc > RIP: 0010:strlen+0x30/0xa0 > Call Trace: > audit_log_untrustedstring+0x19/0x30 > integrity_audit_message+0x366/0x4f0 > ima_inode_setxattr+0x512/0x5f0 > > Check for IS_ERR() and use NULL instead, which makes the audit message > skip the name= field instead of crashing. > > Fixes: 4f2946aa0c45 ("IMA: introduce a new policy option func=SETXATTR_CHECK") > Cc: stable@vger.kernel.org > Reported-by: syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com > Link: https://lore.kernel.org/all/6a8f89e5.1d9ded08.62e62.00bf.GAE@google.com/ > Signed-off-by: Bradley Morgan <brads@mainlining.org> > security/integrity/ima/ima_appraise.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c > index ced2e131b061..b280488e15fc 100644 > --- a/security/integrity/ima/ima_appraise.c > +++ b/security/integrity/ima/ima_appraise.c > @@ -748,6 +748,8 @@ static int validate_hash_algo(struct dentry *dentry, > return -EACCES; > > path = dentry_path(dentry, pathbuf, PATH_MAX); > + if (IS_ERR(path)) > + path = NULL; > > integrity_audit_msg(AUDIT_INTEGRITY_DATA, d_inode(dentry), path, > "set_data", errmsg, -EACCES, 0); > -- > 2.47.3 > >>HEAD commit: cf72cbb39da8 Merge tag 'io_uring-7.3-20260828' of >>git://gi.. >>git tree: upstream >>console output: https://syzkaller.appspot.com/x/log.txt?x=16e7cc15580000 >>kernel config: https://syzkaller.appspot.com/x/.config?x=85bc5cc2fc7394d9 >>dashboard link: >>https://syzkaller.appspot.com/bug?extid=5ebeb3089ea6439c37be >>compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 >>userspace arch: i386 >>syz repro: https://syzkaller.appspot.com/x/repro.syz?x=159ebd79580000 >>C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123d1d79580000 >> >>Downloadable assets: >>disk image (non-bootable): >>https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-cf72cbb3.raw.xz >>vmlinux: https://storage.googleapis.com/syzbot-assets/755d053ff703/vmlinux-cf72cbb3.xz >>kernel image: >>https://storage.googleapis.com/syzbot-assets/0837738ba281/bzImage-cf72cbb3.xz >> >>IMPORTANT: if you fix the issue, please add the following tag to the commit: >>Reported-by: syzbot+5ebeb3089ea6439c37be@syzkaller.appspotmail.com >> >>BUG: unable to handle page fault for address: ffffffffffffffdc >>#PF: supervisor read access in kernel mode >>#PF: error_code(0x0000) - not-present page >>PGD eb99067 P4D eb99067 PUD eb9b067 PMD 0 >>Oops: Oops: 0000 [#1] SMP KASAN NOPTI >>CPU: 0 UID: 0 PID: 5921 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) >>Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS >>1.16.3-debian-1.16.3-2 04/01/2014 >>RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 >>Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 >>RSP: 0018:ffffc90002eb7920 EFLAGS: 00010246 >>RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 >>RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc >>RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9 >>R10: 00000000000006c0 R11: 0000000000000001 R12: ffff888027be0e40 >>R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc >>FS: 0000000000000000(0000) GS:ffff888096967000(0063) knlGS:000000005783f480 >>CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 >>CR2: ffffffffffffffdc CR3: 0000000055e55000 CR4: 0000000000352ef0 >>Call Trace: >> <TASK> >> __fortify_strlen include/linux/fortify-string.h:218 [inline] >> audit_log_untrustedstring+0x19/0x30 kernel/audit.c:2203 >> integrity_audit_message+0x366/0x4f0 >> security/integrity/integrity_audit.c:60 >> integrity_audit_msg+0x41/0x60 security/integrity/integrity_audit.c:32 >> validate_hash_algo security/integrity/ima/ima_appraise.c:752 [inline] >> ima_inode_setxattr+0x512/0x5f0 security/integrity/ima/ima_appraise.c:775 >> security_inode_setxattr+0x299/0x560 security/security.c:1940 >> __vfs_setxattr_locked+0xad/0x2b0 fs/xattr.c:309 >> vfs_setxattr+0x14a/0x390 fs/xattr.c:344 >> do_setxattr+0x145/0x180 fs/xattr.c:662 >> file_setxattr fs/xattr.c:672 [inline] >> file_setxattr+0x139/0x1b0 fs/xattr.c:666 >> path_setxattrat+0x335/0x3b0 fs/xattr.c:732 >> __do_sys_fsetxattr fs/xattr.c:782 [inline] >> __se_sys_fsetxattr fs/xattr.c:779 [inline] >> __ia32_sys_fsetxattr+0xc4/0x140 fs/xattr.c:779 >> do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] >> __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291 >> do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316 >> entry_SYSENTER_compat_after_hwframe+0x84/0x8e >>RIP: 0023:0xf7fb7fec >>Code: Unable to access opcode bytes at 0xf7fb7fc2. >>RSP: 002b:00000000fffd97bc EFLAGS: 00000296 ORIG_RAX: 00000000000000e4 >>RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000080 >>RDX: 0000000080001080 RSI: 0000000000000002 RDI: 0000000000000000 >>RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 >>R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 >>R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 >> </TASK> >>Modules linked in: >>CR2: ffffffffffffffdc >>---[ end trace 0000000000000000 ]--- >>RIP: 0010:strlen+0x30/0xa0 lib/string.c:402 >>Code: 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 <80> 7d 00 00 74 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 >>RSP: 0018:ffffc90002eb7920 EFLAGS: 00010246 >>RAX: 0000000000000000 RBX: ffffffffffffffdc RCX: 0000000000000000 >>RDX: 0000000000000004 RSI: ffffffff82081bc1 RDI: ffffffffffffffdc >>RBP: ffffffffffffffdc R08: 0000000000000004 R09: 00000000000000a9 >>R10: 00000000000006c0 R11: 0000000000000001 R12: ffff888027be0e40 >>R13: 0000000000000007 R14: 00000000fffffff3 R15: ffffffffffffffdc >>FS: 0000000000000000(0000) GS:ffff888096967000(0063) knlGS:000000005783f480 >>CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 >>CR2: 00000000f7fb8000 CR3: 0000000055e55000 CR4: 0000000000352ef0 >>---------------- >>Code disassembly (best guess): >> 0: 00 00 add %al,(%rax) >> 2: 00 00 add %al,(%rax) >> 4: 00 fc add %bh,%ah >> 6: ff lcall (bad) >> 7: df 55 48 fists 0x48(%rbp) >> a: 89 fa mov %edi,%edx >> c: 48 89 fd mov %rdi,%rbp >> f: 53 push %rbx >> 10: 48 c1 ea 03 shr $0x3,%rdx >> 14: 48 83 ec 08 sub $0x8,%rsp >> 18: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax >> 1c: 48 89 fa mov %rdi,%rdx >> 1f: 83 e2 07 and $0x7,%edx >> 22: 38 d0 cmp %dl,%al >> 24: 7f 04 jg 0x2a >> 26: 84 c0 test %al,%al >> 28: 75 50 jne 0x7a >>* 2a: 80 7d 00 00 cmpb $0x0,0x0(%rbp) <-- trapping instruction >> 2e: 74 3d je 0x6d >> 30: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx >> 37: fc ff df >> 3a: 48 89 e8 mov %rbp,%rax >> 3d: 48 rex.W >> 3e: 83 .byte 0x83 >> 3f: c0 .byte 0xc0 >> >> >>--- >>If you want syzbot to run the reproducer, reply with: >>#syz test: git://repo/address.git branch-or-commit-hash >>If you attach or paste a git patch, syzbot will apply it before testing. >> > > --- Thanks! > https://lore.kernel.org/all/EE579805-42F2-4C58-B752-F28779EEB717@grrlz.net/ ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-08-29 18:27 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <6a8f89e5.1d9ded08.62e62.00bf.GAE@google.com>
2026-08-29 18:12 ` [syzbot] [audit?] BUG: unable to handle kernel paging request in integrity_audit_message syzbot
2026-08-29 18:22 ` Bradley Morgan
2026-08-29 18:27 ` syzbot
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox