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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 27102b38b8ca Merge tag 'v6.14-rc3-smb3-client-fix-part2' o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=11e6f498580000 kernel config: https://syzkaller.appspot.com/x/.config?x=246f46d6db29b555 dashboard link: https://syzkaller.appspot.com/bug?extid=49423de13afd058db22f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10e1d3b8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=128fcdb0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2324227e5d74/disk-27102b38.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/10e721e73827/vmlinux-27102b38.xz kernel image: https://storage.googleapis.com/syzbot-assets/4a3889279a6e/bzImage-27102b38.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/63597cabd128/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=15ae27a4580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+49423de13afd058db22f@syzkaller.appspotmail.com ================================================================== 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 dqput+0x79/0x490 fs/quota/dquot.c:868 Read of size 4 at addr 000000000074020f by task syz-executor195/5828 CPU: 0 UID: 0 PID: 5828 Comm: syz-executor195 Not tainted 6.14.0-rc3-syzkaller-00295-g27102b38b8ca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_report+0xe3/0x5b0 mm/kasan/report.c:524 kasan_report+0x143/0x180 mm/kasan/report.c:634 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] dqput+0x79/0x490 fs/quota/dquot.c:868 dqput_all fs/quota/dquot.c:422 [inline] __dquot_drop+0x20b/0x420 fs/quota/dquot.c:1608 jfs_evict_inode+0xbd/0x440 fs/jfs/inode.c:167 evict+0x4e8/0x9a0 fs/inode.c:796 dispose_list fs/inode.c:845 [inline] evict_inodes+0x6f6/0x790 fs/inode.c:899 generic_shutdown_super+0xa0/0x2d0 fs/super.c:627 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413 task_work_run+0x24f/0x310 kernel/task_work.c:227 ptrace_notify+0x2d9/0x380 kernel/signal.c:2522 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc7/0x1d0 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x24a/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcd7fefe407 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc5f71e678 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fcd7fefe407 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc5f71e730 RBP: 00007ffc5f71e730 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffc5f71f7a0 R13: 00005555914236c0 R14: 0000000000000001 R15: 431bde82d7b634db ================================================================== --- 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