syzbot

BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.1/8499
caller is debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:60
CPU: 0 PID: 8499 Comm: syz-executor.1 Not tainted 5.19.0-rc7-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816f3a64>] (dump_backtrace) from [<816f3d94>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253)
 r7:00000000 r6:81710154 r5:60000113 r4:81d80514
[<816f3d7c>] (show_stack) from [<816fc6c0>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816f3d7c>] (show_stack) from [<816fc6c0>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816fc678>] (dump_stack_lvl) from [<816fc6e4>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:81d8a35c r4:852ac680
[<816fc6cc>] (dump_stack) from [<81710130>] (check_preemption_disabled+0xfc/0x100 lib/smp_processor_id.c:49)
[<81710034>] (check_preemption_disabled) from [<81710154>] (debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:60)
 r7:00000a07 r6:852ac680 r5:0000000b r4:ffffffc0
[<81710134>] (debug_smp_processor_id) from [<80216a7c>] (harden_branch_predictor arch/arm/include/asm/system_misc.h:23 [inline])
[<81710134>] (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)
 r9:85536640 r8:85536600 r7:852ac680 r6:00000a07 r5:ffffffc0 r4:ed959fb0
[<80216b68>] (do_page_fault) from [<802170dc>] (do_DataAbort+0x38/0xa8 arch/arm/mm/fault.c:539)
 r10:7ee96544 r9:76f806d0 r8:80216b68 r7:ed959fb0 r6:ffffffc0 r5:00000a07
 r4:8241d218
[<802170a4>] (do_DataAbort) from [<80200dfc>] (__dabt_usr+0x5c/0x60 arch/arm/kernel/entry-armv.S:427)
Exception stack(0xed959fb0 to 0xed959ff8)
9fa0:                                     7fffffff 200001c0 ffffffc0 20000190
9fc0: 00000004 00000313 00000140 20fff000 7ee963b2 76f806d0 7ee96544 76f8020c
9fe0: 00000000 76f7fff8 00000000 000141f4 80000010 ffffffff
 r8:822a1044 r7:852ac680 r6:ffffffff r5:80000010 r4:000141f4