BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6806 caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711 CPU: 1 PID: 6806 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626 ext4_getblk+0xad/0x520 fs/ext4/inode.c:833 ext4_bread+0x7c/0x380 fs/ext4/inode.c:883 ext4_append+0x153/0x360 fs/ext4/namei.c:67 ext4_init_new_dir fs/ext4/namei.c:2757 [inline] ext4_mkdir+0x5e0/0xdf0 fs/ext4/namei.c:2802 vfs_mkdir+0x419/0x690 fs/namei.c:3641 do_mkdirat+0x21e/0x280 fs/namei.c:3664 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f7e8fb9b687 Code: Bad RIP value. RSP: 002b:00007fffe24fa618 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 000055a3f71c4985 RCX: 00007f7e8fb9b687 RDX: 00007fffe24fa4e0 RSI: 00000000000001ed RDI: 000055a3f71c4985 RBP: 00007f7e8fb9b680 R08: 0000000000000100 R09: 0000000000000000 R10: 000055a3f71c4980 R11: 0000000000000246 R12: 00000000000001ed R13: 00007fffe24fa7a0 R14: 0000000000000000 R15: 0000000000000000