syzbot has found a reproducer for the following issue on: HEAD commit: d7fa1af5b33e Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=15e45282580000 kernel config: https://syzkaller.appspot.com/x/.config?x=89c13de706fbf07a dashboard link: https://syzkaller.appspot.com/bug?extid=0652cd10dc5ea0a2eb6f compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17d0cc0c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=163a6570580000
Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/da97ad659b2c/disk-d7fa1af5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/659e123552a8/vmlinux-d7fa1af5.xz kernel image: https://storage.googleapis.com/syzbot-assets/6ec5dbf4643e/Image-d7fa1af5.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f4a821c168d9/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6501 at fs/bcachefs/fs-io-buffered.c:464 bch2_writepage_io_done+0x6fc/0x7b4 fs/bcachefs/fs-io-buffered.c:464 Modules linked in: CPU: 1 UID: 0 PID: 6501 Comm: kworker/u9:2 Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: bcachefs bch2_write_point_do_index_updates pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : bch2_writepage_io_done+0x6fc/0x7b4 fs/bcachefs/fs-io-buffered.c:464 lr : bch2_writepage_io_done+0x6fc/0x7b4 fs/bcachefs/fs-io-buffered.c:464 sp : ffff8000a4b178d0 x29: ffff8000a4b17940 x28: dfff800000000000 x27: 0000000000000003 x26: ffff0000c9b8d7c8 x25: ffff0000c9b8d7c8 x24: ffff0000ddb80000 x23: ffff0000c9b8d920 x22: 0000000000000008 x21: ffff0000c9b8d940 x20: 1fffe00019371b24 x19: 0000000000000c00 x18: 00000000ffffffff x17: ffff800092f39000 x16: ffff80008ad27e48 x15: 0000000000000006 x14: 1ffff00014962f21 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700014962f27 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d7f55b80 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff80009308cef8 x4 : 0000000000000008 x3 : 0000000000000020 x2 : 0000000000000008 x1 : 0000000000000008 x0 : 0000000000000000 Call trace: bch2_writepage_io_done+0x6fc/0x7b4 fs/bcachefs/fs-io-buffered.c:464 (P) bch2_write_done+0x2a4/0x914 fs/bcachefs/io_write.c:542 bch2_write_point_do_index_updates+0x7c/0x4f0 fs/bcachefs/io_write.c:708 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 irq event stamp: 824 hardirqs last enabled at (823): [<ffff80008addfa48>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (823): [<ffff80008addfa48>] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (824): [<ffff80008adb9eb8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:511 softirqs last enabled at (0): [<ffff8000803acfb0>] copy_process+0x112c/0x318c kernel/fork.c:2375 softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ end trace 0000000000000000 ]--- --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
