INFO: task syz-executor.2:5111 blocked for more than 143 seconds. Not tainted 5.15.179-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:22560 pid: 5111 ppid: 4486 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5029 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6375 schedule+0x11b/0x1f0 kernel/sched/core.c:6458 wb_wait_for_completion+0x164/0x290 fs/fs-writeback.c:191 __writeback_inodes_sb_nr+0x2ce/0x370 fs/fs-writeback.c:2684 try_to_writeback_inodes_sb+0x94/0xb0 fs/fs-writeback.c:2732 ext4_nonda_switch fs/ext4/inode.c:2944 [inline] ext4_da_write_begin+0x228/0xb60 fs/ext4/inode.c:2971 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3785 ext4_buffered_write_iter+0x227/0x360 fs/ext4/file.c:268 ext4_file_write_iter+0x1d1/0x1940 fs/ext4/file.c:662 __kernel_write+0x5b1/0xa60 fs/read_write.c:539 __dump_emit+0x264/0x3a0 fs/coredump.c:875 dump_user_range+0x91/0x320 fs/coredump.c:949 elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285 do_coredump+0x1852/0x31e0 fs/coredump.c:826 get_signal+0xc06/0x14e0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_page_fault+0x342/0x700 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0x0 RSP: 002b:0000000020000048 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f074c05ff80 RCX: 00007f074bf40b29 RDX: 0000000020000140 RSI: 0000000020000040 RDI: 0000000000008000 RBP: 00007f074bf8c47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 000000000000000b R14: 00007f074c05ff80 R15: 00007ffda19ba4a8 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: 1 lock held by khungtaskd/27: #0: ffffffff8cb1f4e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/u4:1/144: 4 locks held by kworker/u4:2/154: #0: ffff8880175cd938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc90002047d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 #2: ffffffff8dc37e10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x166/0xc90 net/core/net_namespace.c:572 #3: ffffffff8cb239b0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x9c/0x4e0 kernel/rcu/tree.c:4039 2 locks held by getty/3932: #0: ffff88814cd3b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900025c62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158 3 locks held by syz-executor.2/5111: #0: ffff88802c7ba460 (sb_writers#5){.+.+}-{0:0}, at: do_coredump+0x1825/0x31e0 fs/coredump.c:825 #1: ffff8880677049b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff8880677049b8 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_buffered_write_iter+0xa0/0x360 fs/ext4/file.c:262 #2: ffff88802c7ba0e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x1d/0xb0 fs/fs-writeback.c:2729 1 lock held by syz-executor.5/5881: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/5884: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/5885: 1 lock held by syz-executor.1/5887: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/5892: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/5899: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/5907: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/5932: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/5934: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/5936: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/5939: 1 lock held by syz-executor.5/5940: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/5947: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/5948: 1 lock held by syz-executor.0/5957: 1 lock held by syz-executor.4/5972: 1 lock held by syz-executor.4/5975: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/5977: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/5979: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/5980: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/5982: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/5991: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/5993: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 2 locks held by syz-executor.0/6021: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802c7be3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.5/6022: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802c7be3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.4/6023: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802c7be3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.0/6026: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff88802c7be3f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_log_do_checkpoint+0xb25/0x1220 fs/jbd2/checkpoint.c:243 2 locks held by syz-executor.2/6028: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 #1: ffff8880b8f3a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 1 lock held by syz-executor.1/6029: 1 lock held by syz-executor.1/6035: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/6037: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/6045: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/6053: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/6058: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/6059: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 3 locks held by syz-executor.4/6061: 1 lock held by syz-executor.0/6062: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/6076: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/6081: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/6085: 1 lock held by syz-executor.1/6087: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/6089: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/6096: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/6098: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/6103: 1 lock held by syz-executor.5/6105: 1 lock held by syz-executor.3/6107: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.5/6131: 1 lock held by syz-executor.0/6141: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/6144: 3 locks held by syz-executor.5/6146: 1 lock held by syz-executor.3/6151: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/6158: 1 lock held by syz-executor.3/6170: 1 lock held by syz-executor.1/6189: 1 lock held by syz-executor.0/6218: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/6221: 1 lock held by syz-executor.5/6229: 1 lock held by syz-executor.3/6248: 1 lock held by syz-executor.4/6278: 1 lock held by syz-executor.5/6308: 1 lock held by syz-executor.4/6321: 1 lock held by syz-executor.1/6340: 1 lock held by syz-executor.4/6501: 1 lock held by syz-executor.3/6506: 1 lock held by syz-executor.3/6508: 1 lock held by syz-executor.0/6534: 1 lock held by syz-executor.3/6543: 1 lock held by syz-executor.3/6579: 1 lock held by syz-executor.0/6694: 1 lock held by syz-executor.4/6708: 1 lock held by syz-executor.4/6713: 2 locks held by syz-executor.0/6723: 1 lock held by syz-executor.0/6725: 1 lock held by syz-executor.5/6729: 1 lock held by syz-executor.1/6735: 1 lock held by syz-executor.2/6736: 1 lock held by syz-executor.0/6746: 1 lock held by syz-executor.4/6754: 1 lock held by syz-executor.1/6766: 1 lock held by syz-executor.0/6771: 1 lock held by syz-executor.0/6772: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/6775: 1 lock held by syz-executor.2/6778: 1 lock held by syz-executor.5/6787: 1 lock held by syz-executor.1/6792: 1 lock held by syz-executor.2/6799: 2 locks held by syz-executor.4/6801: 1 lock held by syz-executor.2/6805: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/6809: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.1/6839: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.2/6845: 1 lock held by syz-executor.3/6852: 1 lock held by syz-executor.4/6856: 1 lock held by syz-executor.3/6869: 1 lock held by syz-executor.3/6894: 1 lock held by syz-executor.5/6905: 1 lock held by syz-executor.0/6912: 1 lock held by syz-executor.3/6922: 1 lock held by syz-executor.4/6927: 1 lock held by syz-executor.2/6933: 1 lock held by syz-executor.2/6939: 1 lock held by syz-executor.5/6949: 1 lock held by syz-executor.3/6954: 1 lock held by syz-executor.3/6956: 1 lock held by syz-executor.0/6959: 1 lock held by syz-executor.0/6962: 2 locks held by syz-executor.4/6965: 1 lock held by syz-executor.2/6978: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.3/6979: 1 lock held by syz-executor.3/6980: 1 lock held by syz-executor.5/6981: 1 lock held by syz-executor.1/6983: 1 lock held by syz-executor.5/6986: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.0/7128: 1 lock held by syz-executor.0/7129: #0: ffff88802c7bcbd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: ext4_writepages+0x1f6/0x3d10 fs/ext4/inode.c:2688 1 lock held by syz-executor.4/8004: 1 lock held by syz-executor.2/8123: 1 lock held by dhcpcd/8518: #0: ffff8880201bc120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1684 [inline] #0: ffff8880201bc120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xd60 net/packet/af_packet.c:3213 2 locks held by dhcpcd/8519: #0: ffff88802052e120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1684 [inline] #0: ffff88802052e120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xd60 net/packet/af_packet.c:3213 #1: ffffffff8cb23aa8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8cb23aa8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x350/0x740 kernel/rcu/tree_exp.h:845 1 lock held by dhcpcd/8520: #0: ffff88802c94c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1684 [inline] #0: ffff88802c94c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xd60 net/packet/af_packet.c:3213 1 lock held by dhcpcd/8521: #0: ffff888065aa8120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1684 [inline] #0: ffff888065aa8120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xd60 net/packet/af_packet.c:3213 1 lock held by dhcpcd/8536: #0: ffff88807475c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1684 [inline] #0: ffff88807475c120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xd60 net/packet/af_packet.c:3213 1 lock held by dhcpcd/8537: #0: ffff888074758120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1684 [inline] #0: ffff888074758120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xd60 net/packet/af_packet.c:3213 1 lock held by dhcpcd/8567: #0: ffff888024440120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1684 [inline] #0: ffff888024440120 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xd60 net/packet/af_packet.c:3213 2 locks held by dhcpcd-run-hook/8590: #0: ffff8880b8e3a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 #1: ffff8880b8e27848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x53d/0x810 kernel/sched/psi.c:891 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:369 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5551 Comm: kworker/u4:7 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5363 [inline] RIP: 0010:lock_is_held_type+0xb2/0x180 kernel/locking/lockdep.c:5666 Code: 89 ed 48 81 c5 f0 0a 00 00 31 db 48 83 fb 31 73 24 48 89 ef 4c 89 fe e8 fc 01 00 00 85 c0 75 2a 48 ff c3 49 63 85 e8 0a 00 00 <48> 83 c5 28 48 39 c3 7c d8 eb 11 48 c7 c7 a0 eb 9e 8c 48 89 de e8 RSP: 0018:ffffc90003e4f2b8 EFLAGS: 00000002 RAX: 0000000000000006 RBX: 0000000000000002 RCX: 0000000080000005 RDX: 0000000000000000 RSI: ffffffff8cb1f460 RDI: ffff88807e4028d8 RBP: ffff88807e4028d8 R08: dffffc0000000000 R09: fffffbfff1c153f6 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000046 R13: ffff88807e401dc0 R14: 00000000ffffffff R15: ffffffff8cb1f460 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcc0743e18 CR3: 000000001f5bf000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:287 [inline] rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125 task_css include/linux/cgroup.h:496 [inline] task_ca kernel/sched/cpuacct.c:40 [inline] cpuacct_charge+0x12b/0x330 kernel/sched/cpuacct.c:336 cgroup_account_cputime include/linux/cgroup.h:794 [inline] update_curr+0x443/0xa50 kernel/sched/fair.c:858 check_preempt_wakeup+0x853/0xc00 kernel/sched/fair.c:7433 check_preempt_curr+0xd0/0x290 kernel/sched/core.c:2096 ttwu_do_wakeup+0x27/0x4d0 kernel/sched/core.c:3560 ttwu_queue kernel/sched/core.c:3822 [inline] try_to_wake_up+0x795/0x12c0 kernel/sched/core.c:4145 autoremove_wake_function+0x12/0x110 kernel/sched/wait.c:416 __wake_up_common+0x2a0/0x4e0 kernel/sched/wait.c:108 __wake_up_common_lock kernel/sched/wait.c:138 [inline] __wake_up+0x112/0x1c0 kernel/sched/wait.c:157 sub_reserved_credits fs/jbd2/transaction.c:214 [inline] start_this_handle+0x115c/0x1570 fs/jbd2/transaction.c:443 jbd2_journal_start_reserved+0xe3/0x300 fs/jbd2/transaction.c:625 __ext4_journal_start_reserved+0x224/0x420 fs/ext4/ext4_jbd2.c:154 ext4_convert_unwritten_io_end_vec+0x30/0x170 fs/ext4/extents.c:4899 ext4_end_io_end fs/ext4/page-io.c:186 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:259 [inline] ext4_end_io_rsv_work+0x368/0x6e0 fs/ext4/page-io.c:273 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287