syzbot has found a reproducer for the following issue on: HEAD commit: 6a71d2909427 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=10066e4c980000 kernel config: https://syzkaller.appspot.com/x/.config?x=fca646cf17cc616b dashboard link: https://syzkaller.appspot.com/bug?extid=a35cdb62ec34d44fb062 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15483e4b180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=120e8250980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c77d21fa1405/disk-6a71d290.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/429fcd369816/vmlinux-6a71d290.xz kernel image: https://storage.googleapis.com/syzbot-assets/d3d8a4b85112/Image-6a71d290.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/933ef33aa6cb/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a35cdb62ec34d44fb062@xxxxxxxxxxxxxxxxxxxxxxxxx loop0: detected capacity change from 0 to 32768 workqueue: Failed to create a rescuer kthread for wq "bcachefs_copygc": -EINTR bcachefs (076a1832-646e-4f3c-b13d-b3e266154efd): shutdown complete Unable to handle kernel paging request at virtual address ffff7000249ff210 KASAN: probably wild-memory-access in range [0xffff800124ff9080-0xffff800124ff9087] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001ad5bd000 [ffff7000249ff210] pgd=0000000000000000, p4d=000000023e882003, pud=000000023e880003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 6256 Comm: syz-executor158 Not tainted 6.9.0-rc4-syzkaller-g6a71d2909427 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 80401005 (Nzcv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--) pc : bch2_fs_btree_key_cache_exit+0x7ec/0xfcc fs/bcachefs/btree_key_cache.c:974 lr : bch2_fs_btree_key_cache_exit+0x78c/0xfcc fs/bcachefs/btree_key_cache.c:970 sp : ffff8000980e6e80 x29: ffff8000980e6f50 x28: 1fffe0001d160010 x27: ffff0000e8b044b0 x26: 1ffff0001301cde0 x25: dfff800000000000 x24: 1ffff0001168e5d4 x23: 0000000000000000 x22: ffff800124ff9080 x21: ffff8000980e6f00 x20: ffff80008ee81218 x19: dfff800000000000 x18: 0000000000000008 x17: 656c706d6f63206e x16: ffff8000802896e4 x15: 0000000000000001 x14: 1fffe0001d160898 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001d160899 x10: 0000000000ff0100 x9 : 0000000000000003 x8 : 1ffff000249ff210 x7 : ffff80008275d4e8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008275d4f8 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000008 Call trace: bch2_fs_btree_key_cache_exit+0x7ec/0xfcc fs/bcachefs/btree_key_cache.c:974 __bch2_fs_free fs/bcachefs/super.c:562 [inline] bch2_fs_release+0x1e0/0x564 fs/bcachefs/super.c:609 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2a8/0x41c lib/kobject.c:737 bch2_fs_free+0x288/0x2f0 fs/bcachefs/super.c:674 bch2_fs_alloc+0xe4c/0x1c60 fs/bcachefs/super.c:965 bch2_fs_open+0x740/0xb64 fs/bcachefs/super.c:2080 bch2_mount+0x558/0xe10 fs/bcachefs/fs.c:1900 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1779 do_new_mount+0x278/0x900 fs/namespace.c:3352 path_mount+0x590/0xe04 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3875 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Code: f90027e8 d343fec8 11000d29 f9002be8 (38f36908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f90027e8 str x8, [sp, #72] 4: d343fec8 lsr x8, x22, #3 8: 11000d29 add w9, w9, #0x3 c: f9002be8 str x8, [sp, #80] * 10: 38f36908 ldrsb w8, [x8, x19] <-- trapping instruction --- 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.
