BUG: unable to handle page fault for address: ffffc90000007ff8 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 10800067 P4D 10800067 PUD 109ba067 PMD 109bb067 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 17184 Comm: syz-executor.3 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:sysvec_apic_timer_interrupt+0x7b/0xc0 arch/x86/kernel/apic/apic.c:1100 Code: 00 00 48 c7 c7 60 69 88 89 e8 61 19 00 00 48 c7 c7 60 71 88 89 65 c6 05 36 e6 d3 76 01 e8 4d 19 00 00 65 4c 8b 1d 2d e6 d3 76 <49> 89 23 4c 89 dc e8 6a 43 18 f8 48 89 ef e8 12 4f 03 f8 e8 4d 44 RSP: 0018:ffffc9000191f5c0 EFLAGS: 00010002 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90010639000 RDX: 0000000000040000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000191f5d8 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff817bd4dc R11: ffffc90000007ff8 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f8ee3be1700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000007ff8 CR3: 0000000040560000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:199 Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 be 61 2a f8 48 89 ef e8 66 d7 2a f8 e8 61 10 4b f8 fb bf 01 00 00 00 36 b5 1e f8 65 8b 05 ef 2d d1 76 85 c0 74 02 5d c3 e8 1b 84 cf RSP: 0018:ffffc9000191f688 EFLAGS: 00000206 RAX: 0000000000001017 RBX: 0000000000000000 RCX: 1ffffffff1fa4d92 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff888077c99958 R08: 0000000000000001 R09: ffffffff8fced977 R10: 0000000000000001 R11: 0000000000000034 R12: ffff88806fc202c0 R13: ffffc9000191f708 R14: 0000000000000000 R15: fffff9400039ddb0 spin_unlock_irq include/linux/spinlock.h:404 [inline] __add_to_page_cache_locked+0x780/0x1040 mm/filemap.c:920 add_to_page_cache_lru+0x173/0x5c0 mm/filemap.c:967 pagecache_get_page+0x46d/0x18d0 mm/filemap.c:1896 grab_cache_page_write_begin+0x64/0x90 mm/filemap.c:3610 ext4_da_write_begin+0x354/0x11c0 fs/ext4/inode.c:2984 generic_perform_write+0x202/0x500 mm/filemap.c:3656 ext4_buffered_write_iter+0x244/0x4d0 fs/ext4/file.c:269 ext4_file_write_iter+0x423/0x14e0 fs/ext4/file.c:680 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write+0x426/0x650 fs/read_write.c:518 vfs_write+0x75a/0xa40 fs/read_write.c:605 ksys_write+0x12d/0x250 fs/read_write.c:658 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8ee3be1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 000000000208e24b RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff2262eb6f R14: 00007f8ee3be1300 R15: 0000000000022000 Modules linked in: CR2: ffffc90000007ff8 ---[ end trace b9e2a078448d5568 ]--- RIP: 0010:sysvec_apic_timer_interrupt+0x7b/0xc0 arch/x86/kernel/apic/apic.c:1100 Code: 00 00 48 c7 c7 60 69 88 89 e8 61 19 00 00 48 c7 c7 60 71 88 89 65 c6 05 36 e6 d3 76 01 e8 4d 19 00 00 65 4c 8b 1d 2d e6 d3 76 <49> 89 23 4c 89 dc e8 6a 43 18 f8 48 89 ef e8 12 4f 03 f8 e8 4d 44 RSP: 0018:ffffc9000191f5c0 EFLAGS: 00010002 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90010639000 RDX: 0000000000040000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000191f5d8 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff817bd4dc R11: ffffc90000007ff8 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f8ee3be1700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000007ff8 CR3: 0000000040560000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 c7 c7 60 69 88 89 mov $0xffffffff89886960,%rdi 9: e8 61 19 00 00 callq 0x196f e: 48 c7 c7 60 71 88 89 mov $0xffffffff89887160,%rdi 15: 65 c6 05 36 e6 d3 76 movb $0x1,%gs:0x76d3e636(%rip) # 0x76d3e653 1c: 01 1d: e8 4d 19 00 00 callq 0x196f 22: 65 4c 8b 1d 2d e6 d3 mov %gs:0x76d3e62d(%rip),%r11 # 0x76d3e657 29: 76 2a: 49 89 23 mov %rsp,(%r11) <-- trapping instruction 2d: 4c 89 dc mov %r11,%rsp 30: e8 6a 43 18 f8 callq 0xf818439f 35: 48 89 ef mov %rbp,%rdi 38: e8 12 4f 03 f8 callq 0xf8034f4f 3d: e8 .byte 0xe8 3e: 4d rex.WRB 3f: 44 rex.R