------------[ cut here ]------------ WARNING: CPU: 0 PID: 6556 at include/linux/fs.h:503 i_mmap_assert_write_locked include/linux/fs.h:503 [inline] WARNING: CPU: 0 PID: 6556 at include/linux/fs.h:503 hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 Modules linked in: CPU: 0 PID: 6556 Comm: syz.4.695 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 : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] pc : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 lr : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] lr : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 sp : ffff800021a673b0 x29: ffff800021a673b0 x28: dfff800000000000 x27: ffff70000434ce90 x26: ffff0000df6aa6c0 x25: ffff8000150c0000 x24: 1ffff00002a180b0 x23: dfff800000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000020200000 x19: ffff0000df6aa6c0 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d10fc x15: 0000000000000002 x14: 00000000ffff8000 x13: 000000003df0e786 x12: 0000000000080000 x11: 00000000000029aa x10: ffff800029fd0000 x9 : ffff800008888bd4 x8 : 00000000000029ab x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff800008888a54 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: i_mmap_assert_write_locked include/linux/fs.h:503 [inline] hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 __vma_adjust+0x450/0x16c0 mm/mmap.c:737 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x324/0x448 mm/mmap.c:-1 do_mas_align_munmap+0x5dc/0xeec mm/mmap.c:2501 do_mas_munmap mm/mmap.c:2650 [inline] __mmap_region mm/mmap.c:2698 [inline] mmap_region+0x660/0x18d8 mm/mmap.c:2916 do_mmap+0x9dc/0x11f4 mm/mmap.c:1436 vm_mmap_pgoff+0x184/0x284 mm/util.c:520 ksys_mmap_pgoff+0xd0/0x5a0 mm/mmap.c:1482 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __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: 462 hardirqs last enabled at (461): [] kmem_cache_alloc_bulk+0x3d0/0x500 mm/slub.c:3873 hardirqs last disabled at (462): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (440): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (438): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6556 at include/linux/fs.h:503 i_mmap_assert_write_locked include/linux/fs.h:503 [inline] WARNING: CPU: 1 PID: 6556 at include/linux/fs.h:503 hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 Modules linked in: CPU: 1 PID: 6556 Comm: syz.4.695 Tainted: G W 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 : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] pc : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 lr : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] lr : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 sp : ffff800021a673b0 x29: ffff800021a673b0 x28: dfff800000000000 x27: ffff70000434ce90 x26: ffff0000df6aa6c0 x25: ffff8000150c0000 x24: 1ffff00002a180b0 x23: dfff800000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000021000000 x19: ffff0000df6aa6c0 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000082d10fc x15: 0000000000000002 x14: 00000000ffff8000 x13: 000000003df0e786 x12: 0000000000080000 x11: 000000000001c176 x10: ffff800029fd0000 x9 : ffff800008888bd4 x8 : 000000000001c177 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff800008888a54 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: i_mmap_assert_write_locked include/linux/fs.h:503 [inline] hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 __vma_adjust+0x45c/0x16c0 mm/mmap.c:738 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x324/0x448 mm/mmap.c:-1 do_mas_align_munmap+0x5dc/0xeec mm/mmap.c:2501 do_mas_munmap mm/mmap.c:2650 [inline] __mmap_region mm/mmap.c:2698 [inline] mmap_region+0x660/0x18d8 mm/mmap.c:2916 do_mmap+0x9dc/0x11f4 mm/mmap.c:1436 vm_mmap_pgoff+0x184/0x284 mm/util.c:520 ksys_mmap_pgoff+0xd0/0x5a0 mm/mmap.c:1482 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __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: 598 hardirqs last enabled at (597): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (597): [] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (598): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (592): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (592): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624 softirqs last disabled at (465): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6556 at include/linux/fs.h:503 i_mmap_assert_write_locked include/linux/fs.h:503 [inline] WARNING: CPU: 0 PID: 6556 at include/linux/fs.h:503 hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 Modules linked in: CPU: 0 PID: 6556 Comm: syz.4.695 Tainted: G W 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 : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] pc : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 lr : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] lr : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 sp : ffff800021a675b0 x29: ffff800021a675b0 x28: dfff800000000000 x27: ffff70000434ced0 x26: ffff0000df6aa6c0 x25: ffff8000150c0000 x24: 1ffff00002a180b0 x23: dfff800000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000020400000 x19: ffff0000df6aa6c0 x18: 0000000000000000 x17: ffff8000087f256c x16: ffff8000082d10fc x15: ffff8000089def48 x14: 00000000ffff8000 x13: 0000000093ba57ea x12: 0000000000080000 x11: 0000000000002174 x10: ffff800029fd0000 x9 : ffff800008888bd4 x8 : 0000000000002175 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff800008888a54 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: i_mmap_assert_write_locked include/linux/fs.h:503 [inline] hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 __vma_adjust+0x450/0x16c0 mm/mmap.c:737 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x324/0x448 mm/mmap.c:-1 split_vma+0xa0/0xf8 mm/mmap.c:2424 userfaultfd_register fs/userfaultfd.c:1466 [inline] userfaultfd_ioctl+0x3818/0x45c0 fs/userfaultfd.c:2034 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __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: 830 hardirqs last enabled at (829): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (829): [] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194 hardirqs last disabled at (830): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (792): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (790): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6556 at include/linux/fs.h:503 i_mmap_assert_write_locked include/linux/fs.h:503 [inline] WARNING: CPU: 0 PID: 6556 at include/linux/fs.h:503 hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 Modules linked in: CPU: 0 PID: 6556 Comm: syz.4.695 Tainted: G W 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 : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] pc : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 lr : i_mmap_assert_write_locked include/linux/fs.h:503 [inline] lr : hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 sp : ffff800021a675b0 x29: ffff800021a675b0 x28: dfff800000000000 x27: ffff70000434ced0 x26: ffff0000df6aa6c0 x25: ffff8000150c0000 x24: 1ffff00002a180b0 x23: dfff800000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000021000000 x19: ffff0000df6aa6c0 x18: 0000000000000000 x17: ffff8000087f256c x16: ffff8000082d10fc x15: ffff8000089def48 x14: 00000000ffff8000 x13: 0000000093ba57ea x12: 0000000000080000 x11: 0000000000018821 x10: ffff800029fd0000 x9 : ffff800008888bd4 x8 : 0000000000018822 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff800008888a54 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: i_mmap_assert_write_locked include/linux/fs.h:503 [inline] hugetlb_split+0x234/0x29c mm/hugetlb.c:4920 __vma_adjust+0x45c/0x16c0 mm/mmap.c:738 vma_adjust include/linux/mm.h:2810 [inline] __split_vma+0x324/0x448 mm/mmap.c:-1 split_vma+0xa0/0xf8 mm/mmap.c:2424 userfaultfd_register fs/userfaultfd.c:1466 [inline] userfaultfd_ioctl+0x3818/0x45c0 fs/userfaultfd.c:2034 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856 __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: 986 hardirqs last enabled at (985): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (985): [] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (986): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (980): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (980): [] handle_softirqs+0xaf8/0xc6c kernel/softirq.c:624 softirqs last disabled at (833): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ end trace 0000000000000000 ]---