syz.4.264: attempt to access beyond end of device loop4: rw=0, sector=6491536, nr_sectors = 2 limit=128 Buffer I/O error on dev loop4, logical block 3245768, async page read ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5355 at fs/inode.c:389 inc_nlink+0x128/0x154 fs/inode.c:389 Modules linked in: CPU: 0 PID: 5355 Comm: syz.4.264 Not tainted 6.1.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : inc_nlink+0x128/0x154 fs/inode.c:389 lr : inc_nlink+0x128/0x154 fs/inode.c:389 sp : ffff800021957b90 x29: ffff800021957b90 x28: dfff800000000000 x27: 0000000000000000 x26: 1fffe0001eabc80c x25: ffff800011d35208 x24: 0000000000000000 x23: 1fffe0001eabc810 x22: dfff800000000000 x21: 0000000000000007 x20: ffff0000f55e4038 x19: ffff0000f55e4080 x18: 0000000000000000 x17: ffff8000181e7000 x16: ffff8000082d2370 x15: 0000000000000000 x14: 00000000ffff8000 x13: 000000003bcdb8d7 x12: 0000000000ff0100 x11: ff008000089fbf80 x10: 0000000000000000 x9 : ffff8000089fbf80 x8 : ffff0000dc14d340 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000e2bded38 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: inc_nlink+0x128/0x154 fs/inode.c:389 inode_inc_link_count include/linux/fs.h:2576 [inline] sysv_mkdir+0x2c/0x138 fs/sysv/namei.c:119 vfs_mkdir+0x314/0x4d4 fs/namei.c:4106 do_mkdirat+0x1b4/0x3e0 fs/namei.c:4131 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4144 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 1880 hardirqs last enabled at (1879): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:242 hardirqs last disabled at (1880): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1780): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1778): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- sysv_new_block: new block -1271527736 is not in data zone