Hello, syzbot found the following issue on: HEAD commit: afe0cbf23373 mm: Introduce vmap_page_range() to map pages .. git tree: bpf-next console output: https://syzkaller.appspot.com/x/log.txt?x=1014c63e180000 kernel config: https://syzkaller.appspot.com/x/.config?x=92e06b597766606e dashboard link: https://syzkaller.appspot.com/bug?extid=7e51ea277ea81fe6935d 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/03e310611053/disk-afe0cbf2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ebf9a3ff28a5/vmlinux-afe0cbf2.xz kernel image: https://storage.googleapis.com/syzbot-assets/c4747941c346/bzImage-afe0cbf2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7e51ea277ea81fe6935d@xxxxxxxxxxxxxxxxxxxxxxxxx watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz-executor.0:27055] Modules linked in: irq event stamp: 19856771 hardirqs last enabled at (19856770): [<ffffffff8b6bbe43>] irqentry_exit+0x63/0x90 kernel/entry/common.c:351 hardirqs last disabled at (19856771): [<ffffffff8b6b9ade>] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1076 softirqs last enabled at (19856234): [<ffffffff81592661>] invoke_softirq kernel/softirq.c:427 [inline] softirqs last enabled at (19856234): [<ffffffff81592661>] __irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632 softirqs last disabled at (19856237): [<ffffffff81592661>] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (19856237): [<ffffffff81592661>] __irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632 CPU: 0 PID: 27055 Comm: syz-executor.0 Not tainted 6.8.0-rc6-syzkaller-gafe0cbf23373 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:unwind_next_frame+0x78c/0x29e0 arch/x86/kernel/unwind_orc.c:512 Code: 0f b6 04 28 84 c0 0f 85 2b 1a 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 4d 89 f7 0f 85 38 1a 00 00 0f b7 5d 00 c1 eb 0b <80> e3 01 48 8b 44 24 78 42 0f b6 04 28 84 c0 4c 8b 74 24 48 0f 85 RSP: 0018:ffffc90000007268 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888022cf9dc0 RDX: ffffc90000007375 RSI: ffffffff8dfa0160 RDI: 0000000000000002 RBP: ffffffff90827e78 R08: 0000000000000003 R09: ffffffff81405417 R10: 0000000000000002 R11: ffff888022cf9dc0 R12: ffffffff8fe836bc R13: dffffc0000000000 R14: 1ffff92000000e68 R15: 1ffff92000000e68 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f295c0d56c6 CR3: 0000000041be4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: <IRQ> arch_stack_walk+0x150/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x117/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc_node+0x18f/0x380 mm/slub.c:3903 kmalloc_reserve+0x8a/0x260 net/core/skbuff.c:578 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:669 skb_copy+0xef/0x770 net/core/skbuff.c:2131 mac80211_hwsim_tx_frame_no_nl+0x1068/0x18d0 drivers/net/wireless/virtual/mac80211_hwsim.c:1854 mac80211_hwsim_tx_frame+0x1cc/0x220 drivers/net/wireless/virtual/mac80211_hwsim.c:2200 mac80211_hwsim_beacon_tx+0x3be/0x7e0 drivers/net/wireless/virtual/mac80211_hwsim.c:2300 __iterate_interfaces+0x223/0x4c0 net/mac80211/util.c:772 ieee80211_iterate_active_interfaces_atomic+0xd8/0x170 net/mac80211/util.c:808 mac80211_hwsim_beacon+0xd4/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim.c:2326 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x594/0xd00 kernel/time/hrtimer.c:1753 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1770 __do_softirq+0x2bb/0x942 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632 irq_exit_rcu+0x9/0x30 kernel/softirq.c:644 sysvec_irq_work+0x94/0xb0 arch/x86/kernel/irq_work.c:17 </IRQ> <TASK> asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:preempt_schedule_irq+0xf6/0x1c0 kernel/sched/core.c:7047 Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 8a 00 00 00 bf 01 00 00 00 e8 45 68 ef f5 e8 20 b8 25 f6 fb bf 01 00 00 00 <e8> 85 ae ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 e5 87 81 f6 48 RSP: 0018:ffffc900132674c0 EFLAGS: 00000282 RAX: aac9d4750a501f00 RBX: 1ffff9200264cea0 RCX: ffffffff8171895a RDX: dffffc0000000000 RSI: ffffffff8baab660 RDI: 0000000000000001 RBP: ffffc90013267570 R08: ffffffff92ca8457 R09: 1ffffffff259508a R10: dffffc0000000000 R11: fffffbfff259508b R12: 1ffff9200264ce98 R13: 1ffff9200264ce9c R14: ffffc900132674e0 R15: dffffc0000000000 irqentry_exit+0x5e/0x90 kernel/entry/common.c:348 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:unmap_single_vma+0x0/0x2b0 mm/memory.c:1678 Code: 8b 3c 24 e8 a2 23 18 00 e9 77 fc ff ff e8 98 66 8d 09 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 30 44 89 4c 24 0c 4c 89 04 RSP: 0018:ffffc90013267638 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffffffffffff RDX: 0000000000000000 RSI: ffff88807cd27600 RDI: ffffc90013267840 RBP: ffffc900132677c8 R08: ffffc90013267710 R09: 0000000000000000 R10: 0000000000000002 R11: ffff888022cf9dc0 R12: 1ffff1100f9a4ec4 R13: ffff88807cd27600 R14: 0000000000000000 R15: ffff88807cd27620 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1758 exit_mmap+0x2c6/0xd40 mm/mmap.c:3279 __mmput+0x115/0x3c0 kernel/fork.c:1343 exit_mm+0x21f/0x310 kernel/exit.c:569 do_exit+0x9af/0x2740 kernel/exit.c:858 do_group_exit+0x206/0x2c0 kernel/exit.c:1020 get_signal+0x176d/0x1850 kernel/signal.c:2893 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0xc8/0x360 kernel/entry/common.c:212 do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f3ca5e7dda9 Code: Unable to access opcode bytes at 0x7f3ca5e7dd7f. RSP: 002b:00007f3ca6bdb0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffed RBX: 00007f3ca5fabf80 RCX: 00007f3ca5e7dda9 RDX: 0000000020000040 RSI: 0000000000008923 RDI: 0000000000000004 RBP: 00007f3ca5eca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f3ca5fabf80 R15: 00007fffb9292628 </TASK> Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 27047 Comm: syz-executor.1 Not tainted 6.8.0-rc6-syzkaller-gafe0cbf23373 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] RIP: 0010:kvm_wait+0x250/0x2c0 arch/x86/kernel/kvm.c:1059 Code: 3b 45 0f b6 f6 44 89 ff 44 89 f6 e8 0a c6 53 00 e8 f5 f3 5a 00 45 38 f7 75 15 66 90 e8 79 c5 53 00 0f 00 2d a2 7b 68 0a fb f4 <e9> 50 fe ff ff e8 66 c5 53 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38 RSP: 0018:ffffc900001f0660 EFLAGS: 00000246 RAX: ffffffff813fa7f7 RBX: ffffffff8ec7e200 RCX: ffff88807d793b80 RDX: 0000000000000103 RSI: ffffffff8baab660 RDI: ffffffff8bfe81a0 RBP: ffffc900001f0730 R08: ffffffff92ca848f R09: 1ffffffff2595091 R10: dffffc0000000000 R11: fffffbfff2595092 R12: 1ffff9200003e0d0 R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32223000 CR3: 000000007f3e6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> pv_wait arch/x86/include/asm/paravirt.h:596 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x6ff/0xc60 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline] queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x271/0x370 kernel/locking/spinlock_debug.c:116 spin_lock include/linux/spinlock.h:351 [inline] mac80211_hwsim_tx_frame_no_nl+0x97f/0x18d0 drivers/net/wireless/virtual/mac80211_hwsim.c:1805 mac80211_hwsim_tx_frame+0x1cc/0x220 drivers/net/wireless/virtual/mac80211_hwsim.c:2200 mac80211_hwsim_beacon_tx+0x3be/0x7e0 drivers/net/wireless/virtual/mac80211_hwsim.c:2300 __iterate_interfaces+0x223/0x4c0 net/mac80211/util.c:772 ieee80211_iterate_active_interfaces_atomic+0xd8/0x170 net/mac80211/util.c:808 mac80211_hwsim_beacon+0xd4/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim.c:2326 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x594/0xd00 kernel/time/hrtimer.c:1753 hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1770 __do_softirq+0x2bb/0x942 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632 irq_exit_rcu+0x9/0x30 kernel/softirq.c:644 sysvec_irq_work+0x94/0xb0 arch/x86/kernel/irq_work.c:17 </IRQ> <TASK> asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:rcu_read_unlock_special+0x88/0x550 kernel/rcu/tree_plugin.h:682 Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 f9 19 88 7e 41 f7 c4 00 00 f0 00 74 49 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a RSP: 0018:ffffc900132b77e0 EFLAGS: 00000206 RAX: c8b0ea340731d000 RBX: 1ffff92002656f04 RCX: ffffffff8171895a RDX: dffffc0000000000 RSI: ffffffff8baab660 RDI: ffffffff8bfe81a0 RBP: ffffc900132b78b0 R08: ffffffff92ca845f R09: 1ffffffff259508b R10: dffffc0000000000 R11: fffffbfff259508c R12: 0000000000000000 R13: ffff88807d793fd8 R14: ffffc900132b7820 R15: 1ffff92002656f00 __rcu_read_unlock+0xa0/0x110 kernel/rcu/tree_plugin.h:426 rcu_read_unlock+0x85/0xa0 include/linux/rcupdate.h:782 dput+0x197/0x2b0 fs/dcache.c:844 __fput+0x678/0x8a0 fs/file_table.c:384 task_work_run+0x24e/0x310 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa2c/0x2740 kernel/exit.c:871 do_group_exit+0x206/0x2c0 kernel/exit.c:1020 get_signal+0x176d/0x1850 kernel/signal.c:2893 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0xc8/0x360 kernel/entry/common.c:212 do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f0ffb87dda9 Code: Unable to access opcode bytes at 0x7f0ffb87dd7f. RSP: 002b:00007f0ffc6af0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007f0ffb9ac050 RCX: 00007f0ffb87dda9 RDX: 0000000020000000 RSI: 0000000000008914 RDI: 0000000000000006 RBP: 00007f0ffb8ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0ffb9ac050 R15: 00007ffdcaf26e88 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
