Hello, syzbot found the following issue on: HEAD commit: eb5e56d14912 Merge tag 'platform-drivers-x86-v6.11-2' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=102b4a5d980000 kernel config: https://syzkaller.appspot.com/x/.config?x=9358cc4a2e37fd30 dashboard link: https://syzkaller.appspot.com/bug?extid=890a1df7294175947697 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e2044b21f4b5/disk-eb5e56d1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ad2274fd812e/vmlinux-eb5e56d1.xz kernel image: https://storage.googleapis.com/syzbot-assets/dd82f6220580/bzImage-eb5e56d1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+890a1df7294175947697@xxxxxxxxxxxxxxxxxxxxxxxxx rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6528/2:b..l rcu: (detected by 1, t=10502 jiffies, g=157649, q=508 ncpus=2) task:syz.2.7467 state:R running task stack:23296 pid:6528 tgid:6524 ppid:22273 flags:0x00004002 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline] RIP: 0010:write_comp_data kernel/kcov.c:235 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x90 kernel/kcov.c:311 Code: 44 0a 20 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 <65> 48 8b 0c 25 00 d7 03 00 65 8b 05 c0 5b 70 7e a9 00 01 ff 00 74 RSP: 0018:ffffc90004d3f240 EFLAGS: 00000246 RAX: ffffffff8ba8c664 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc900168cc000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000001 R08: ffffffff8ba8c677 R09: ffffffff8ba8c2db R10: 0000000000000002 R11: ffff888067083c00 R12: 1ffff920009a7e93 R13: ffffc90004d3f498 R14: dffffc0000000000 R15: 0000000000000000 xa_is_internal include/linux/xarray.h:175 [inline] xa_is_node include/linux/xarray.h:1264 [inline] xas_find+0x497/0x960 lib/xarray.c:1284 next_uptodate_folio+0x29/0xa40 mm/filemap.c:3464 filemap_map_pages+0x302/0x1e70 mm/filemap.c:3616 do_fault_around mm/memory.c:5019 [inline] do_read_fault mm/memory.c:5052 [inline] do_fault mm/memory.c:5191 [inline] do_pte_missing mm/memory.c:3947 [inline] handle_pte_fault+0x39aa/0x6eb0 mm/memory.c:5522 __handle_mm_fault mm/memory.c:5665 [inline] handle_mm_fault+0xf70/0x1880 mm/memory.c:5833 faultin_page mm/gup.c:1194 [inline] __get_user_pages+0x6ec/0x16a0 mm/gup.c:1493 populate_vma_page_range+0x264/0x330 mm/gup.c:1932 __mm_populate+0x27a/0x460 mm/gup.c:2035 mm_populate include/linux/mm.h:3415 [inline] vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:593 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f05b9b779f9 RSP: 002b:00007f05ba90e048 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f05b9d06058 RCX: 00007f05b9b779f9 RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f05b9be58ee R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f05b9d06058 R15: 00007ffeeee41568 </TASK> rcu: rcu_preempt kthread starved for 10541 jiffies! g157649 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:24624 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.11.0-rc2-syzkaller-00011-geb5e56d14912 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline] RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112 Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 00 d7 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d e5 cb 9b 00 f3 0f 1e fa fb f4 <fa> c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246 RAX: ffff888017af0000 RBX: ffff8880196ce864 RCX: 000000000ab344c9 RDX: 0000000000000001 RSI: ffff8880196ce800 RDI: ffff8880196ce864 RBP: 000000000003a678 R08: ffff8880b9337c7b R09: 1ffff11017266f8f R10: dffffc0000000000 R11: ffffffff8bad6c90 R12: ffff88801bb1b800 R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eeca1a0 FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f90f82d5b5e CR3: 0000000060604000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> </IRQ> <TASK> acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:230 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:326 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x147 </TASK> --- This report is generated by a bot. 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