__kernel_write fs/read_write.c:639 [inline] kernel_write+0x1ca/0x2e0 fs/read_write.c:660 process_sysctl_arg+0x39c/0x5f0 fs/proc/proc_sysctl.c:1688 parse_one kernel/params.c:153 [inline] parse_args+0x30d/0xa70 kernel/params.c:186 do_sysctl_args+0xd0/0x150 fs/proc/proc_sysctl.c:1720 kernel_init+0x84/0x1d0 init/main.c:1497 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 page_owner free stack trace missing ------------[ cut here ]------------ kernel BUG at mm/filemap.c:154! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6491 Comm: syz.3.172 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:filemap_unaccount_folio+0x715/0x790 mm/filemap.c:154 Code: c2 ca ff 48 89 df 48 c7 c6 40 2e 94 8b e8 93 f9 10 00 90 0f 0b e8 2b c2 ca ff 48 89 df 48 c7 c6 20 2d 94 8b e8 7c f9 10 00 90 <0f> 0b e8 14 c2 ca ff 48 89 df 48 c7 c6 40 2e 94 8b e8 65 f9 10 00 RSP: 0018:ffffc9001c0f70e0 EFLAGS: 00010046 RAX: 4b370b2eda49a400 RBX: ffffea0002d10000 RCX: 4b370b2eda49a400 RDX: 0000000000000005 RSI: ffffffff8db8419f RDI: ffff888034e0da00 RBP: 0000000000000001 R08: ffff8880b8624293 R09: 1ffff110170c4852 R10: dffffc0000000000 R11: ffffed10170c4853 R12: 0000000000000040 R13: 1ffffd40005a2000 R14: 1ffffd40005a2001 R15: ffffea0002d10008 FS: 00007fe4ce36f6c0(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000010cb30 CR3: 000000007c9d0000 CR4: 00000000003526f0 Call Trace: __filemap_remove_folio+0xc3/0x500 mm/filemap.c:223 filemap_remove_folio+0xe6/0x1f0 mm/filemap.c:253 hugetlb_delete_from_page_cache fs/hugetlbfs/inode.c:334 [inline] remove_inode_single_folio fs/hugetlbfs/inode.c:539 [inline] remove_inode_hugepages+0x594/0x1100 fs/hugetlbfs/inode.c:596 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:719 [inline] hugetlbfs_fallocate+0xbc7/0x1100 fs/hugetlbfs/inode.c:745 vfs_fallocate+0x6a3/0x830 fs/open.c:341 madvise_remove mm/madvise.c:1043 [inline] madvise_vma_behavior mm/madvise.c:1274 [inline] madvise_walk_vmas mm/madvise.c:1541 [inline] madvise_do_behavior+0x169d/0x2e70 mm/madvise.c:1733 do_madvise+0x174/0x220 mm/madvise.c:1826 __do_sys_madvise mm/madvise.c:1835 [inline] __se_sys_madvise mm/madvise.c:1833 [inline] __x64_sys_madvise+0xa7/0xc0 mm/madvise.c:1833 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe4cd58e9a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe4ce36f038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fe4cd7b6320 RCX: 00007fe4cd58e9a9 RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000200000000000 RBP: 00007fe4cd610d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fe4cd7b6320 R15: 00007fe4cd8dfa28 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:filemap_unaccount_folio+0x715/0x790 mm/filemap.c:154 Code: c2 ca ff 48 89 df 48 c7 c6 40 2e 94 8b e8 93 f9 10 00 90 0f 0b e8 2b c2 ca ff 48 89 df 48 c7 c6 20 2d 94 8b e8 7c f9 10 00 90 <0f> 0b e8 14 c2 ca ff 48 89 df 48 c7 c6 40 2e 94 8b e8 65 f9 10 00 RSP: 0018:ffffc9001c0f70e0 EFLAGS: 00010046 RAX: 4b370b2eda49a400 RBX: ffffea0002d10000 RCX: 4b370b2eda49a400 RDX: 0000000000000005 RSI: ffffffff8db8419f RDI: ffff888034e0da00 RBP: 0000000000000001 R08: ffff8880b8624293 R09: 1ffff110170c4852 R10: dffffc0000000000 R11: ffffed10170c4853 R12: 0000000000000040 R13: 1ffffd40005a2000 R14: 1ffffd40005a2001 R15: ffffea0002d10008 FS: 00007fe4ce36f6c0(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000010cb30 CR3: 000000007c9d0000 CR4: 00000000003526f0