audit: type=1804 audit(1671280122.302:336): pid=19113 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3785067464/syzkaller.9f9wPw/4/file0/bus" dev="loop2" ino=842 res=1 hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 19113 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:percpu_counter_add_batch+0x47/0x180 lib/percpu_counter.c:87 Code: 01 00 00 00 e8 7a 16 ba fd 4c 8d 75 50 48 c7 c7 40 1c b6 88 e8 da c8 ef ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 06 01 00 00 4c 8b 7d 50 65 45 8b 2f 4d 63 e5 4c RSP: 0018:ffff88803c15f908 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffc9000bff2000 RDX: 0000000000000027 RSI: ffffffff83771e31 RDI: 0000000000000005 RBP: 00000000000000e8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000138 R15: ffff88808b090880 FS: 00007ff1ee357700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31735000 CR3: 0000000047517000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __add_wb_stat include/linux/backing-dev.h:70 [inline] inc_wb_stat include/linux/backing-dev.h:75 [inline] __test_set_page_writeback+0xf23/0x1750 mm/page-writeback.c:2783 set_page_writeback include/linux/page-flags.h:497 [inline] __block_write_full_page+0xa74/0xf60 fs/buffer.c:1827 block_write_full_page+0x1f3/0x260 fs/buffer.c:2951 udf_expand_file_adinicb+0x59b/0xf40 fs/udf/inode.c:302 udf_setsize+0x621/0x1030 fs/udf/inode.c:1242 udf_setattr+0x33d/0x430 fs/udf/file.c:278 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 do_sys_ftruncate+0x492/0x560 fs/open.c:194 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff1efde50d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff1ee357168 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007ff1eff04f80 RCX: 00007ff1efde50d9 RDX: 0000000000000000 RSI: 0000000002007ffb RDI: 000000000000000c RBP: 00007ff1efe40ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffed4399bf R14: 00007ff1ee357300 R15: 0000000000022000 Modules linked in: ---[ end trace cee7dee102a03339 ]--- RIP: 0010:percpu_counter_add_batch+0x47/0x180 lib/percpu_counter.c:87 Code: 01 00 00 00 e8 7a 16 ba fd 4c 8d 75 50 48 c7 c7 40 1c b6 88 e8 da c8 ef ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 06 01 00 00 4c 8b 7d 50 65 45 8b 2f 4d 63 e5 4c RSP: 0018:ffff88803c15f908 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffc9000bff2000 RDX: 0000000000000027 RSI: ffffffff83771e31 RDI: 0000000000000005 RBP: 00000000000000e8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000138 R15: ffff88808b090880 FS: 00007ff1ee357700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31735000 CR3: 0000000047517000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 00 add %al,(%rax) 4: e8 7a 16 ba fd callq 0xfdba1683 9: 4c 8d 75 50 lea 0x50(%rbp),%r14 d: 48 c7 c7 40 1c b6 88 mov $0xffffffff88b61c40,%rdi 14: e8 da c8 ef ff callq 0xffefc8f3 19: 4c 89 f2 mov %r14,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 06 01 00 00 jne 0x13a 34: 4c 8b 7d 50 mov 0x50(%rbp),%r15 38: 65 45 8b 2f mov %gs:(%r15),%r13d 3c: 4d 63 e5 movslq %r13d,%r12 3f: 4c rex.WR