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BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (7)

Status: upstream: reported C repro on 2024/09/14 09:10
Subsystems: btrfs
[Documentation on labels]
Reported-by: syzbot+74f79df25c37437e4d5a@syzkaller.appspotmail.com
First crash: 33d, last: 1d12h
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [net?] BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (7) 0 (2) 2024/09/18 15:03
▶ ▼ Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (6) btrfs C 2 43d 44d 0/28 closed as invalid on 2024/08/30 15:02
upstream BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (3) btrfs C 7 353d 353d 0/28 closed as invalid on 2023/10/17 19:49
upstream BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (5) btrfs C 931 52d 82d 27/28 fixed on 2024/08/14 19:57
upstream BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (4) btrfs C 8 347d 348d 0/28 closed as invalid on 2023/10/23 13:15
upstream BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! C done error 25236 1599d 2039d 15/28 fixed on 2020/12/09 20:00
upstream BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (2) kernel C 2688 359d 1315d 23/28 fixed on 2023/10/12 12:47
linux-5.15 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! origin:upstream missing-backport C error 2 221d 417d 0/3 upstream: reported C repro on 2023/08/14 00:36
linux-6.1 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! origin:upstream C error 21 277d 556d 0/3 upstream: reported C repro on 2023/03/28 22:33

Sample crash report:
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 137 Comm: kworker/u8:4 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: btrfs-endio-write btrfs_work_helper
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:319
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:326
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:119
 dump_stack+0x1c/0x28 lib/dump_stack.c:128
 lookup_chain_cache_add kernel/locking/lockdep.c:3815 [inline]
 validate_chain kernel/locking/lockdep.c:3836 [inline]
 __lock_acquire+0x1fa0/0x779c kernel/locking/lockdep.c:5142
 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5759
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 btrfs_block_rsv_size fs/btrfs/block-rsv.h:136 [inline]
 btrfs_use_block_rsv+0x184/0x73c fs/btrfs/block-rsv.c:495
 btrfs_alloc_tree_block+0x16c/0x12d4 fs/btrfs/extent-tree.c:5130
 btrfs_force_cow_block+0x4e4/0x1c9c fs/btrfs/ctree.c:573
 btrfs_cow_block+0x318/0xa28 fs/btrfs/ctree.c:754
 btrfs_search_slot+0xba0/0x2a08
 btrfs_lookup_file_extent+0x124/0x1bc fs/btrfs/file-item.c:267
 btrfs_drop_extents+0x370/0x2ad8 fs/btrfs/file.c:251
 insert_reserved_file_extent+0x2b4/0xa6c fs/btrfs/inode.c:2911
 insert_ordered_extent_file_extent+0x348/0x508 fs/btrfs/inode.c:3016
 btrfs_finish_one_ordered+0x6a0/0x129c fs/btrfs/inode.c:3124
 btrfs_finish_ordered_io+0x120/0x134 fs/btrfs/inode.c:3266
 finish_ordered_fn+0x20/0x30 fs/btrfs/ordered-data.c:331
 btrfs_work_helper+0x340/0xd28 fs/btrfs/async-thread.c:314
 process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x978/0xec4 kernel/workqueue.c:3389
 kthread+0x288/0x310 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/18 15:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 c673ca06 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/10/03 12:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/26 07:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/18 19:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/18 19:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/18 19:51 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/15 05:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 08d8a733 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/15 05:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 08d8a733 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/14 12:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 ff60e2ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/14 09:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 ff60e2ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/13 23:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 158f4851 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/13 23:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5f5673607153 158f4851 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/03 02:15 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci df54f4a16f82 abeaa9b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
2024/09/01 14:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci df54f4a16f82 1eda0d14 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
* Struck through repros no longer work on HEAD.