Hello, syzbot found the following issue on: HEAD commit: 1c9135d29e9e Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=150ebfdf180000 kernel config: https://syzkaller.appspot.com/x/.config?x=7d2d53e64c7e6a4f dashboard link: https://syzkaller.appspot.com/bug?extid=8d075c0e52baab2345e2 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=132e5e04980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1031edbc980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/52dd1b4921ab/disk-1c9135d2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1a4f1788dc25/vmlinux-1c9135d2.xz kernel image: https://storage.googleapis.com/syzbot-assets/b8d8ebd42a80/Image-1c9135d2.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/816a43fa80f6/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8d075c0e52baab2345e2@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: rw=0, sector=17669878, nr_sectors = 2 limit=128 Buffer I/O error on dev loop0, logical block 8834939, async page read ================================================================== BUG: KASAN: use-after-free in sysv_new_inode+0xd24/0xe9c fs/sysv/ialloc.c:153 Read of size 2 at addr ffff0000dee091ce by task syz-executor425/6318 CPU: 0 PID: 6318 Comm: syz-executor425 Not tainted 6.9.0-rc7-syzkaller-g1c9135d29e9e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x198/0x538 mm/kasan/report.c:488 kasan_report+0xd8/0x138 mm/kasan/report.c:601 __asan_report_load2_noabort+0x20/0x2c mm/kasan/report_generic.c:379 sysv_new_inode+0xd24/0xe9c fs/sysv/ialloc.c:153 sysv_mknod+0x5c/0x100 fs/sysv/namei.c:53 sysv_create+0x38/0x4c fs/sysv/namei.c:67 lookup_open fs/namei.c:3497 [inline] open_last_lookups fs/namei.c:3566 [inline] path_openat+0xfb4/0x2830 fs/namei.c:3796 do_filp_open+0x1bc/0x3cc fs/namei.c:3826 do_sys_openat2+0x124/0x1b8 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1432 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x11ee09 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000000 fffffdffc373ab48 fffffdffc3799848 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dee09080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000dee09100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000dee09180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000dee09200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000dee09280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== syz-executor425: attempt to access beyond end of device loop0: rw=0, sector=6491536, nr_sectors = 2 limit=128 Buffer I/O error on dev loop0, logical block 3245768, async page read syz-executor425: attempt to access beyond end of device loop0: rw=0, sector=17666806, nr_sectors = 2 limit=128 Buffer I/O error on dev loop0, logical block 8833403, async page read syz-executor425: attempt to access beyond end of device loop0: rw=0, sector=26539618, nr_sectors = 2 limit=128 Buffer I/O error on dev loop0, logical block 13269809, async page read syz-executor425: attempt to access beyond end of device loop0: rw=0, sector=16147212, nr_sectors = 2 limit=128 Buffer I/O error on dev loop0, logical block 8073606, async page read --- 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@xxxxxxxxxxxxxxxx. 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
