syzbot


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: 162d, last: 27d
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
  
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
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/08/06 23:12 15m retest repro upstream report log
2024/08/06 23:12 19m retest repro upstream report log
2024/05/21 07:59 18m retest repro upstream report log
Fix bisection attempts (1)
Created Duration User Patch Repo Result
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 (7):
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
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
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.