BUG: unable to handle page fault for address: ffff88801a201000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 10c01067 P4D 10c01067 PUD 10c02067 PMD 1dd00063 PTE 800000000000404e Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8460 Comm: ifupdown-hotplu Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49 Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 cc cc cc cc cc cc 41 57 41 56 41 55 41 54 55 53 48 89 fb RSP: 0018:ffffc900018674a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000400dc0 RCX: 0000000000001000 RDX: ffffea0000688040 RSI: ffff888000000000 RDI: ffff88801a201000 RBP: ffffea0000688040 R08: 0000160000000000 R09: ffffea0000688080 R10: fffff940000d100e R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88813fffb700 FS: 00007f6630785480(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88801a201000 CR3: 000000001e22f000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: clear_page arch/x86/include/asm/page_64.h:49 [inline] clear_highpage include/linux/highmem.h:203 [inline] kernel_init_free_pages mm/page_alloc.c:1238 [inline] post_alloc_hook+0x175/0x200 mm/page_alloc.c:2350 prep_new_page mm/page_alloc.c:2358 [inline] get_page_from_freelist+0x1034/0x2bf0 mm/page_alloc.c:3994 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5200 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272 pmd_alloc_one include/asm-generic/pgalloc.h:126 [inline] __pmd_alloc+0x3b/0x5c0 mm/memory.c:4675 pmd_alloc include/linux/mm.h:2172 [inline] copy_pmd_range mm/memory.c:1044 [inline] copy_pud_range mm/memory.c:1101 [inline] copy_p4d_range mm/memory.c:1125 [inline] copy_page_range+0x2b58/0x3e50 mm/memory.c:1198 dup_mmap kernel/fork.c:598 [inline] dup_mm+0x9ed/0x1380 kernel/fork.c:1373 copy_mm kernel/fork.c:1425 [inline] copy_process+0x5e19/0x70e0 kernel/fork.c:2115 kernel_clone+0xe7/0xac0 kernel/fork.c:2502 __do_sys_clone+0xc8/0x110 kernel/fork.c:2619 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f663027f38b Code: db 45 85 f6 0f 85 95 01 00 00 64 4c 8b 04 25 10 00 00 00 31 d2 4d 8d 90 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 de 00 00 00 85 c0 41 89 c5 0f 85 e5 00 00 RSP: 002b:00007fff8e69fb30 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f663027f38b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff8e69fb60 R08: 00007f6630785480 R09: 0000000000000030 R10: 00007f6630785750 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 000055f2e07221a8 Modules linked in: CR2: ffff88801a201000 ---[ end trace 63bf41051e3aebf7 ]--- RIP: 0010:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49 Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 cc cc cc cc cc cc 41 57 41 56 41 55 41 54 55 53 48 89 fb RSP: 0018:ffffc900018674a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000400dc0 RCX: 0000000000001000 RDX: ffffea0000688040 RSI: ffff888000000000 RDI: ffff88801a201000 RBP: ffffea0000688040 R08: 0000160000000000 R09: ffffea0000688080 R10: fffff940000d100e R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88813fffb700 FS: 00007f6630785480(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88801a201000 CR3: 000000001e22f000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400