rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x7cd/0x1070 kernel/rcu/tree.c:2869
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1076
 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
kernel BUG at mm/filemap.c:860!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 7690 Comm: syz.2.496 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__filemap_add_folio+0x11bc/0x1330 mm/filemap.c:859
Code: f4 c4 ff 4c 89 e7 48 c7 c6 c0 b5 d7 8b e8 0c a5 26 ff 90 0f 0b e8 f4 f3 c4 ff 4c 89 e7 48 c7 c6 20 aa d7 8b e8 f5 a4 26 ff 90 <0f> 0b e8 dd f3 c4 ff 4c 89 e7 48 c7 c6 c0 b5 d7 8b e8 de a4 26 ff
RSP: 0018:ffffc9000da271e0 EFLAGS: 00010246
RAX: 85c3cd441a2a2500 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8e106c7e RDI: 00000000ffffffff
RBP: ffffc9000da27360 R08: ffffffff9033bef7 R09: 1ffffffff20677de
R10: dffffc0000000000 R11: fffffbfff20677df R12: ffffea00013e7f80
R13: dffffc0000000000 R14: ffffea00013e7f88 R15: 0000000000000004
FS:  00007fac5f6516c0(0000) GS:ffff888125204000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd3ccf0ff8 CR3: 00000000760ca000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_add_folio+0x264/0x530 mm/filemap.c:967
 ra_alloc_folio mm/readahead.c:456 [inline]
 page_cache_ra_order+0x6a9/0xe80 mm/readahead.c:515
 do_sync_mmap_readahead+0x6ad/0x8e0 mm/filemap.c:3406
 filemap_fault+0x703/0x1300 mm/filemap.c:3555
 __do_fault+0x3e7/0x590 mm/memory.c:5501
 do_read_fault mm/memory.c:5936 [inline]
 do_fault mm/memory.c:6070 [inline]
 do_pte_missing+0x2093/0x33f0 mm/memory.c:4550
 handle_pte_fault mm/memory.c:6454 [inline]
 __handle_mm_fault mm/memory.c:6592 [inline]
 handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6761
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1683/0x2720 mm/gup.c:1428
 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860
 __mm_populate+0x25f/0x390 mm/gup.c:1963
 mm_populate include/linux/mm.h:4137 [inline]
 vm_mmap_pgoff+0x3aa/0x4f0 mm/util.c:586
 ksys_mmap_pgoff+0x51e/0x760 mm/mmap.c:606
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fac5e79c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fac5f651028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fac5ea16090 RCX: 00007fac5e79c819
RDX: 0000000001000002 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fac5e832c91 R08: 0000000000000004 R09: 000000002c93a000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fac5ea16128 R14: 00007fac5ea16090 R15: 00007ffc83d79578
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x11bc/0x1330 mm/filemap.c:859
Code: f4 c4 ff 4c 89 e7 48 c7 c6 c0 b5 d7 8b e8 0c a5 26 ff 90 0f 0b e8 f4 f3 c4 ff 4c 89 e7 48 c7 c6 20 aa d7 8b e8 f5 a4 26 ff 90 <0f> 0b e8 dd f3 c4 ff 4c 89 e7 48 c7 c6 c0 b5 d7 8b e8 de a4 26 ff
RSP: 0018:ffffc9000da271e0 EFLAGS: 00010246
RAX: 85c3cd441a2a2500 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8e106c7e RDI: 00000000ffffffff
RBP: ffffc9000da27360 R08: ffffffff9033bef7 R09: 1ffffffff20677de
R10: dffffc0000000000 R11: fffffbfff20677df R12: ffffea00013e7f80
R13: dffffc0000000000 R14: ffffea00013e7f88 R15: 0000000000000004
FS:  00007fac5f6516c0(0000) GS:ffff888125204000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6d55e92f8 CR3: 00000000760ca000 CR4: 00000000003526f0