BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/30624 caller is debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:60 CPU: 1 PID: 30624 Comm: syz-executor.0 Not tainted 5.19.0-rc7-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816f3954>] (dump_backtrace) from [<816f3c84>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253) r7:00000001 r6:8171004c r5:60000113 r4:81d805d4 [<816f3c6c>] (show_stack) from [<816fc5b0>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f3c6c>] (show_stack) from [<816fc5b0>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fc568>] (dump_stack_lvl) from [<816fc5d4>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:81d8a41c r4:844dbac0 [<816fc5bc>] (dump_stack) from [<81710028>] (check_preemption_disabled+0xfc/0x100 lib/smp_processor_id.c:49) [<8170ff2c>] (check_preemption_disabled) from [<8171004c>] (debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:60) r7:00000207 r6:844dbac0 r5:0000000b r4:fffffffc [<8171002c>] (debug_smp_processor_id) from [<80216a7c>] (harden_branch_predictor arch/arm/include/asm/system_misc.h:23 [inline]) [<8171002c>] (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) r9:82b03a40 r8:82b03a00 r7:844dbac0 r6:00000207 r5:fffffffc r4:dfa79fb0 [<80216b68>] (do_page_fault) from [<802170dc>] (do_DataAbort+0x38/0xa8 arch/arm/mm/fault.c:539) r10:000bd138 r9:00000000 r8:80216b68 r7:dfa79fb0 r6:fffffffc r5:00000207 r4:8241d218 [<802170a4>] (do_DataAbort) from [<80200dfc>] (__dabt_usr+0x5c/0x60 arch/arm/kernel/entry-armv.S:427) Exception stack(0xdfa79fb0 to 0xdfa79ff8) 9fa0: ffffffff fffffffc 00000001 ffffffff 9fc0: ffffffff 76f2ce58 0000000b 00084cc0 00000073 00000000 000bd138 76f2ce4c 9fe0: 7f030101 76f2c960 000357ac 00046e44 60000010 ffffffff r8:822a1044 r7:844dbac0 r6:ffffffff r5:60000010 r4:00046e44