syzbot

BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/19362
caller is debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:60
CPU: 1 PID: 19362 Comm: syz-executor.0 Not tainted 5.18.0-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816f16ac>] (dump_backtrace) from [<816f19dc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253)
 r7:00000001 r6:8170db24 r5:60000113 r4:81d7e6b0
[<816f19c4>] (show_stack) from [<816fa2c4>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816f19c4>] (show_stack) from [<816fa2c4>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816fa27c>] (dump_stack_lvl) from [<816fa2e8>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:81d885f0 r4:84230bc0
[<816fa2d0>] (dump_stack) from [<8170db00>] (check_preemption_disabled+0xfc/0x100 lib/smp_processor_id.c:49)
[<8170da04>] (check_preemption_disabled) from [<8170db24>] (debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:60)
 r7:0000020e r6:84230bc0 r5:0000000b r4:99999998
[<8170db04>] (debug_smp_processor_id) from [<80216a7c>] (harden_branch_predictor arch/arm/include/asm/system_misc.h:23 [inline])
[<8170db04>] (debug_smp_processor_id) from [<80216a7c>] (__do_user_fault+0x8c/0xfc arch/arm/mm/fault.c:163)
[<802169f0>] (__do_user_fault) from [<80216cf4>] (do_page_fault+0x18c/0x38c arch/arm/mm/fault.c:374)
 r9:85793440 r8:85793400 r7:84230bc0 r6:0000020e r5:99999998 r4:edbf1fb0
[<80216b68>] (do_page_fault) from [<802170dc>] (do_DataAbort+0x38/0xa8 arch/arm/mm/fault.c:539)
 r10:000bcc10 r9:00000000 r8:80216b68 r7:edbf1fb0 r6:99999998 r5:0000020e
 r4:8241d288
[<802170a4>] (do_DataAbort) from [<80200dfc>] (__dabt_usr+0x5c/0x60 arch/arm/kernel/entry-armv.S:427)
Exception stack(0xedbf1fb0 to 0xedbf1ff8)
1fa0:                                     99999999 99999998 00000001 ffffffff
1fc0: 99999999 76fa1e58 0000000b 00084bb0 00000073 00000000 000bcc10 76fa1e4c
1fe0: 7f030101 76fa1960 0003569c 00046d34 60000010 ffffffff
 r8:822a1044 r7:84230bc0 r6:ffffffff r5:60000010 r4:00046d34