KASAN: user-memory-access Read in jfs_statfs

Status: upstream: reported C repro on 2024/05/07 07:57
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+cea4fad5485bc30243a9@syzkaller.appspotmail.com
First crash: 818d, last: 4d18h
Cause bisection: introduced by (bisect log) [no-op ignored commit]:
commit 233d3ee4ba3636c0215714ee9f282e08147a452b
Author: Kent Russell <kent.russell@amd.com>
Date: Fri Mar 22 13:01:26 2019 +0000

  drm/amdgpu: Allow switching to CUSTOM profile on smu7 v2

Crash: KASAN: use-after-free Read in lbmIODone (log)
Repro: syz .config
  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ ✨ AI Jobs (6)
ID Workflow Result Correct Bug Created Started Finished Revision Error
106ded6f assessment-security 💥 KASAN: user-memory-access Read in jfs_statfs 2026/07/09 00:56 2026/07/09 00:56 2026/07/09 01:23 93f57954 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/04190e8715b6c82645...
truncated to first 200 bytes; open job for full error
59b23704 assessment-security 💥 KASAN: user-memory-access Read in jfs_statfs 2026/06/22 02:31 2026/06/22 02:31 2026/06/22 02:52 43bfcdb0 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/04190e8715b6c82645...
truncated to first 200 bytes; open job for full error
a99b70b5 assessment-security 💥 KASAN: user-memory-access Read in jfs_statfs 2026/06/14 02:07 2026/06/14 02:07 2026/06/14 02:31 4f06757f 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/04190e8715b6c82645...
truncated to first 200 bytes; open job for full error
591ac556 assessment-security 💥 KASAN: user-memory-access Read in jfs_statfs 2026/06/09 17:43 2026/06/09 17:43 2026/06/09 18:07 c36c07f6 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/04190e8715b6c82645...
truncated to first 200 bytes; open job for full error
24dc8f7b assessment-security 💥 KASAN: user-memory-access Read in jfs_statfs 2026/06/02 14:40 2026/06/02 14:40 2026/06/02 15:09 62fe1528 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/04190e8715b6c82645...
truncated to first 200 bytes; open job for full error
dae0239e assessment-security 💥 KASAN: user-memory-access Read in jfs_statfs 2026/05/25 09:22 2026/05/25 09:22 2026/05/25 09:45 c69befb3 
failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/04190e8715b6c82645...
truncated to first 200 bytes; open job for full error
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [jfs?] KASAN: user-memory-access Read in jfs_statfs 0 (2) 2024/07/23 22:40
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 KASAN: user-memory-access Read in jfs_statfs origin:upstream 17 syz error 1 193d 193d 0/3 upstream: reported syz repro on 2026/01/12 17:59
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/06/11 22:18 2h24m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2026/06/02 01:59 29m retest repro upstream log
2026/04/20 13:27 19m retest repro upstream report log
2026/04/02 18:45 2h00m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error
2026/04/02 18:14 2h16m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error
2026/03/12 14:58 14m retest repro upstream report log
2026/02/09 03:09 19m retest repro upstream report log
2026/01/22 11:28 3h16m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error
2026/01/22 11:51 2h53m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci error
2025/12/24 06:21 14m retest repro upstream report log
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2024/10/15 01:45 0m bisect fix upstream error job log
2024/09/10 06:17 1h48m bisect fix upstream OK (0) job log log

Sample crash report:
==================================================================
BUG: KASAN: user-memory-access in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: user-memory-access in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: user-memory-access in jfs_statfs+0x20e/0x510 fs/jfs/super.c:140
Read of size 4 at addr 00000000000050c0 by task syz-executor415/5092

CPU: 1 UID: 0 PID: 5092 Comm: syz-executor415 Not tainted 6.10.0-syzkaller-12084-g28bbe4ea686a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_report+0xe8/0x550 mm/kasan/report.c:491
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 jfs_statfs+0x20e/0x510 fs/jfs/super.c:140
 statfs_by_dentry fs/statfs.c:66 [inline]
 vfs_statfs fs/statfs.c:90 [inline]
 user_statfs+0x213/0x460 fs/statfs.c:105
 __do_sys_statfs fs/statfs.c:195 [inline]
 __se_sys_statfs fs/statfs.c:192 [inline]
 __x64_sys_statfs+0xe8/0x1a0 fs/statfs.c:192
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa111cece59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa111c82218 EFLAGS: 00000246 ORIG_RAX: 0000000000000089
RAX: ffffffffffffffda RBX: 00007fa111d7b718 RCX: 00007fa111cece59
RDX: 00007fa111cece59 RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00007fa111d7b710 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa111d4829c
R13: 0032656c69662f2e R14: a92483129444e42d R15: 00007ffecd531438
 </TASK>
==================================================================

Crashes (17):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/07/23 22:39 upstream 28bbe4ea686a e50e8da5 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2024/05/07 07:56 upstream dccb07f2914c fa7a5cf0 .config strace log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2026/07/20 19:35 upstream 1590cf032971 de6a700d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2026/07/13 02:03 upstream f4fb100039e9 d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2026/05/03 16:25 upstream 66edb901bf87 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2026/02/26 10:45 upstream d9d32e5bd5a4 e0f78d93 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2025/10/30 09:08 upstream e53642b87a4f fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2025/06/23 19:40 upstream 86731a2a651e d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2025/05/11 01:18 upstream bec6f00f120e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2024/05/07 04:21 upstream dccb07f2914c fa7a5cf0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2024/05/02 09:24 upstream 0106679839f7 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2024/04/27 21:52 upstream 5d12ed4bea43 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: user-memory-access Read in jfs_statfs
2025/11/16 06:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: user-memory-access Read in jfs_statfs
2025/03/19 17:51 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b5737d35364f 8d0a2921 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 KASAN: user-memory-access Read in jfs_statfs
2026/06/27 15:22 upstream 5a66900afbd6 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in jfs_statfs
2024/07/23 21:06 upstream 28bbe4ea686a e50e8da5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in jfs_statfs
2024/06/26 11:10 upstream 55027e689933 c6d33a01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in jfs_statfs
* Struck through repros no longer work on HEAD.