syz.1.12: attempt to access beyond end of device loop1: rw=0, sector=6491536, nr_sectors = 2 limit=128 Buffer I/O error on dev loop1, logical block 3245768, async page read ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4471 at fs/inode.c:389 inc_nlink+0x128/0x154 fs/inode.c:389 Modules linked in: CPU: 0 PID: 4471 Comm: syz.1.12 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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 : ffff800020f67b90 x29: ffff800020f67b90 x28: dfff800000000000 x27: 0000000000000000 x26: 1fffe0001ea3400c x25: ffff800011ce4d08 x24: 00000000000001ff x23: 1fffe0001ea34010 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000f51a0038 x19: ffff0000f51a0080 x18: 0000000000000000 x17: ffff800018184000 x16: ffff8000082d3a08 x15: 0000000000000002 x14: 00000000ffff8000 x13: 00000000b6ff2dff x12: 0000000000080000 x11: 00000000000088f8 x10: ffff8000220ec000 x9 : ffff8000089fe30c x8 : 00000000000088f9 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : 00000000000001ff x2 : ffff0000f511fbe8 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:4114 do_mkdirat+0x1b4/0x3e0 fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152 __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: 1658 hardirqs last enabled at (1657): [] kasan_quarantine_put+0xc4/0x204 mm/kasan/quarantine.c:242 hardirqs last disabled at (1658): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (1574): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1572): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- syz.1.12: attempt to access beyond end of device loop1: rw=2049, sector=4133687758, nr_sectors = 2 limit=128 Buffer I/O error on dev loop1, logical block 2066843879, lost async page write sysv_free_block: flc_count > flc_size netlink: 108 bytes leftover after parsing attributes in process `syz.1.12'. netlink: 8 bytes leftover after parsing attributes in process `syz.1.12'. syz.1.12: attempt to access beyond end of device loop1: rw=0, sector=6491536, nr_sectors = 2 limit=128 Buffer I/O error on dev loop1, logical block 3245768, async page read syz.1.12: attempt to access beyond end of device loop1: rw=0, sector=6491536, nr_sectors = 2 limit=128 Buffer I/O error on dev loop1, logical block 3245768, async page read