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AJvYcCU0c4Mn77mbEifOxW0zrYj0sjXuO2UVZI1pPyX9MJnhBIVTS8CA1OGIUeHELvX67i3F1YPhAc7HzQBftyI=@vger.kernel.org X-Gm-Message-State: AOJu0YzJuToSKJO/99ipv4Fy/XeGUwCrNOiGwkByhrM7iA9bAOE2LGW0 FOnxSa3epIwil9BL0OS+X7UrjP86TdJuudBYPfKnIIVcRgY6imLa30FvWiMgCxZEGiQTOYtzYTx MAgffkILxKybRU6nfo+0bfroUCqiie3cPpqGy8XdCUcqlzFYQPlcLSHXKHzM= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:160f:b0:662:c0a9:e5b1 with SMTP id 006d021491bc7-662cabb26f9mr364761eaf.80.1769107778742; Thu, 22 Jan 2026 10:49:38 -0800 (PST) Date: Thu, 22 Jan 2026 10:49:38 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69727142.050a0220.706b.0027.GAE@google.com> Subject: [syzbot] [jfs?] KMSAN: uninit-value in txLock From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: e84d960149e7 Merge tag 'for-6.19-rc5-tag' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16784b9a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=46b5f80a6e7aaa5c dashboard link: https://syzkaller.appspot.com/bug?extid=d3a57c32b9112d7b01ec compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=158fdb9a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=170153fa580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2d9623942f5a/disk-e84d9601.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/61b0e15f8560/vmlinux-e84d9601.xz kernel image: https://storage.googleapis.com/syzbot-assets/8b71c88680c4/bzImage-e84d9601.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/7023ce628e6e/mount_2.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=130153fa580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d3a57c32b9112d7b01ec@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in txLock+0x13a2/0x2900 fs/jfs/jfs_txnmgr.c:659 txLock+0x13a2/0x2900 fs/jfs/jfs_txnmgr.c:659 xtTruncate+0x1002/0x5050 fs/jfs/jfs_xtree.c:2337 jfs_truncate_nolock+0x223/0x670 fs/jfs/inode.c:396 jfs_truncate fs/jfs/inode.c:420 [inline] jfs_write_failed+0x207/0x3c0 fs/jfs/inode.c:295 jfs_write_end+0xcc/0x110 fs/jfs/inode.c:322 generic_perform_write+0x999/0x1050 mm/filemap.c:4335 __generic_file_write_iter+0x213/0x460 mm/filemap.c:4431 generic_file_write_iter+0x131/0x980 mm/filemap.c:4457 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xbe2/0x15d0 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x2ab/0x3b0 fs/read_write.c:798 x64_sys_call+0xbaf/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd3/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_frozen_pages_noprof+0x421/0xab0 mm/page_alloc.c:5263 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0x102/0x280 mm/mempolicy.c:2577 vm_area_alloc_pages mm/vmalloc.c:3649 [inline] __vmalloc_area_node mm/vmalloc.c:3863 [inline] __vmalloc_node_range_noprof+0xa94/0x2d90 mm/vmalloc.c:4051 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline] vmalloc_noprof+0xce/0x140 mm/vmalloc.c:4146 txInit+0xb5c/0xfa0 fs/jfs/jfs_txnmgr.c:297 init_jfs_fs+0x1b2/0xcb0 fs/jfs/super.c:977 do_one_initcall+0x22b/0xad0 init/main.c:1378 do_initcall_level+0x157/0x2e0 init/main.c:1440 do_initcalls+0x176/0x310 init/main.c:1456 do_basic_setup+0x1d/0x30 init/main.c:1475 kernel_init_freeable+0x214/0x430 init/main.c:1688 kernel_init+0x2f/0x5e0 init/main.c:1578 ret_from_fork+0x208/0x710 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 CPU: 1 UID: 0 PID: 6025 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup