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Mon, 10 Nov 2025 05:07:02 -0800 (PST) Date: Mon, 10 Nov 2025 05:07:02 -0800 In-Reply-To: <912d60c8-e898-4113-b167-9549bc15f026@windriver.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6911e376.a70a0220.22f260.00f0.GAE@google.com> Subject: Re: [syzbot] [jfs?] general protection fault in txCommit (2) From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, yun.zhou@windriver.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: UBSAN: array-index-out-of-bounds in dtInsertEntry loop0: detected capacity change from 0 to 32768 UFO tlock:0xffffc900034f9048 ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:3707:8 index -1 is out of range for type 'struct dtslot[128]' CPU: 0 UID: 0 PID: 6833 Comm: syz.0.58 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 ubsan_epilogue+0xa/0x40 lib/ubsan.c:233 __ubsan_handle_out_of_bounds+0xe9/0xf0 lib/ubsan.c:455 dtInsertEntry+0x936/0x1430 fs/jfs/jfs_dtree.c:3707 dtInsert+0x931/0x6000 fs/jfs/jfs_dtree.c:894 jfs_create+0x6c8/0xa80 fs/jfs/namei.c:137 lookup_open fs/namei.c:3796 [inline] open_last_lookups fs/namei.c:3895 [inline] path_openat+0x1500/0x3840 fs/namei.c:4131 do_filp_open+0x1fa/0x410 fs/namei.c:4161 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa2c965f6c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa2c8cce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fa2c98b5fa0 RCX: 00007fa2c965f6c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000580 RBP: 00007fa2c96e1f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa2c98b6038 R14: 00007fa2c98b5fa0 R15: 00007ffe646c1968 ---[ end trace ]--- Tested on: commit: e9a6fb0b Linux 6.18-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17265412580000 kernel config: https://syzkaller.appspot.com/x/.config?x=41ad820f608cb833 dashboard link: https://syzkaller.appspot.com/bug?extid=9489c9f9f3d437221ea2 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=11bbb084580000