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WARNING: CPU: 1 PID: 14753 at kernel/rcu/tree_stall.h:894 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:886
Modules linked in:
CPU: 1 PID: 14753 Comm: syz-executor.2 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:894
Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 60 15 22 90 e8 fe 1d 5a 00 b8 01 00 00 00 87 05 13 86 c0 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd 00 48 98 8b 48 c7 c3 ac 8b 6c 8d 74 58 48 b8 00 00
RSP: 0018:ffffc90000dc0e30 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 000000010004d893 RCX: ffffffff81618f42
RDX: fffffbfff20442ac RSI: 0000000000000004 RDI: ffffffff90221560
RBP: ffffffff8b984800 R08: 0000000000000001 R09: 0000000000000003
R10: fffffbfff20442ac R11: 1ffff110173aa53e R12: 1ffffffff16c1e30
R13: 0000000000000246 R14: ffff8880b9d52912 R15: 0000000000000001
FS:  00007fc90c785700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000014e2d0000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:857 [inline]
 rcu_core+0x4df/0x1380 kernel/rcu/tree.c:2780
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6328
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 62 f8 23 f8 e8 bd 3f 50 f8 fb bf 01 00 00 00 <e8> d2 cd ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 70 e7 23
RSP: 0018:ffffc9000332f2e8 EFLAGS: 00000206
RAX: 0000000000004a21 RBX: ffff8880a76b1c40 RCX: 1ffffffff1fa1482
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed1014ed6388 R08: 0000000000000001 R09: ffffffff8fcd1937
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit+0x31/0x80 kernel/entry/common.c:427
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__find_get_block+0x229/0xdb0 fs/buffer.c:1306
Code: 8d 18 9e ff 49 8d 7f 60 be 04 00 00 00 e8 7f 3c e4 ff f0 41 ff 47 60 eb 03 45 31 ed e8 70 18 9e ff e8 8b 3b a4 ff fb 4d 85 ed <0f> 84 b2 01 00 00 e8 5c 18 9e ff 0f 1f 44 00 00 e8 52 18 9e ff e8
RSP: 0018:ffffc9000332f3b8 EFLAGS: 00000246
RAX: 0000000000002013 RBX: 0000000000000010 RCX: 1ffffffff1fa1482
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000000f R08: 0000000000000001 R09: ffffffff8fcd1937
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000008603
R13: 0000000000000000 R14: 0000000000001000 R15: 0000000000000000
 __getblk_gfp+0x28/0x80 fs/buffer.c:1330
 sb_getblk include/linux/buffer_head.h:327 [inline]
 ext4_get_branch+0x2fa/0x5a0 fs/ext4/indirect.c:159
 ext4_ind_map_blocks+0x598/0x2440 fs/ext4/indirect.c:545
 ext4_da_map_blocks fs/ext4/inode.c:1759 [inline]
 ext4_da_get_block_prep+0x6c8/0x11b0 fs/ext4/inode.c:1834
 ext4_block_write_begin+0x503/0x1110 fs/ext4/inode.c:1077
 ext4_da_write_begin+0x3d8/0x11c0 fs/ext4/inode.c:3015
 generic_perform_write+0x202/0x500 mm/filemap.c:3656
 ext4_buffered_write_iter+0x244/0x4d0 fs/ext4/file.c:269
 ext4_dio_write_iter fs/ext4/file.c:587 [inline]
 ext4_file_write_iter+0xf00/0x14e0 fs/ext4/file.c:678
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write+0x426/0x650 fs/read_write.c:518
 vfs_write+0x75a/0xa40 fs/read_write.c:605
 ksys_write+0x12d/0x250 fs/read_write.c:658
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc90c785188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000043408 RSI: 0000000020000200 RDI: 0000000000000005
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd4bf477af R14: 00007fc90c785300 R15: 0000000000022000