syzbot

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2629 jiffies s: 901 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4397 Comm: syz-executor319 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4218 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4256 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x3b0/0x7c0 kernel/locking/lockdep.c:4315
Code: 00 48 ba 00 00 00 00 00 fc ff df 85 c0 0f 84 a3 00 00 00 41 0f b6 04 16 84 c0 75 6c 49 ff c5 48 63 06 49 83 c7 28 49 83 c4 28 <49> 39 c5 7c 8c e9 82 00 00 00 48 c7 c7 e0 b9 9f 8c 4c 89 ee e8 17
RSP: 0018:ffffc90003f57500 EFLAGS: 00000086
RAX: 0000000000000003 RBX: ffff88807a633c00 RCX: ffffffff8164ad54
RDX: dffffc0000000000 RSI: ffff88807a6346d8 RDI: ffffffff90af2240
RBP: ffffc90003f575c0 R08: ffffffff90af2247 R09: 1ffffffff215e448
R10: dffffc0000000000 R11: fffffbfff215e449 R12: ffff88807a634778
R13: 0000000000000003 R14: 1ffff1100f4c68db R15: ffff88807a634758
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0999c1eb3c CR3: 0000000025f49000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 e2 82 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90003f57680 EFLAGS: 00000206
RAX: 6641b90e4e4d5b00 RBX: 1ffff920007eaed8 RCX: 6641b90e4e4d5b00
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adee1a0
RBP: ffffc90003f57780 R08: ffffffff90af2247 R09: 1ffffffff215e448
R10: dffffc0000000000 R11: fffffbfff215e449 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3bb00 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 page_ext_put+0x91/0xb0 mm/page_ext.c:182
 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
 zap_pte_range mm/memory.c:1433 [inline]
 zap_pmd_range mm/memory.c:1572 [inline]
 zap_pud_range mm/memory.c:1601 [inline]
 zap_p4d_range mm/memory.c:1622 [inline]
 unmap_page_range+0x1905/0x25b0 mm/memory.c:1643
 unmap_vmas+0x260/0x390 mm/memory.c:1728
 exit_mmap+0x20d/0x970 mm/mmap.c:3250
 __mmput+0x118/0x3a0 kernel/fork.c:1206
 exit_mm+0x24d/0x350 kernel/exit.c:566
 do_exit+0x958/0x2570 kernel/exit.c:868
 do_group_exit+0x229/0x2e0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0999bb6045
Code: Unable to access opcode bytes at 0x7f0999bb601b.
RSP: 002b:00007fff95577cf8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f0999bb6045
RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f0999c4f108 R14: 00007f0999c513a8 R15: 00007f0999c513c0
 </TASK>