Hello, syzbot found the following issue on: HEAD commit: f03359bca01b Merge tag 'for-6.9-rc6-tag' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17c169df180000 kernel config: https://syzkaller.appspot.com/x/.config?x=bbf567496022057b dashboard link: https://syzkaller.appspot.com/bug?extid=97b4444a5bd7bf30b3a8 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b345b1c01095/disk-f03359bc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d59970ea319e/vmlinux-f03359bc.xz kernel image: https://storage.googleapis.com/syzbot-assets/47407f406f40/bzImage-f03359bc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+97b4444a5bd7bf30b3a8@xxxxxxxxxxxxxxxxxxxxxxxxx loop3: detected capacity change from 0 to 32768 bcachefs (loop3): mounting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,nojournal_transaction_names bcachefs (loop3): recovering from clean shutdown, journal seq 10 ===================================================== BUG: KMSAN: uninit-value in skcipher_walk_virt+0x91/0x1a0 crypto/skcipher.c:504 skcipher_walk_virt+0x91/0x1a0 crypto/skcipher.c:504 chacha_stream_xor+0x7c/0x710 crypto/chacha_generic.c:22 crypto_chacha_crypt+0x79/0xb0 crypto/chacha_generic.c:45 crypto_skcipher_encrypt+0x1a0/0x1e0 crypto/skcipher.c:671 do_encrypt_sg fs/bcachefs/checksum.c:107 [inline] do_encrypt+0x99c/0xc30 fs/bcachefs/checksum.c:127 gen_poly_key fs/bcachefs/checksum.c:190 [inline] bch2_checksum+0x21f/0x7c0 fs/bcachefs/checksum.c:226 bch2_btree_node_read_done+0x1898/0x75e0 fs/bcachefs/btree_io.c:1055 btree_node_read_work+0x8a5/0x1eb0 fs/bcachefs/btree_io.c:1324 bch2_btree_node_read+0x3d42/0x4b50 __bch2_btree_root_read fs/bcachefs/btree_io.c:1748 [inline] bch2_btree_root_read+0xa6c/0x13d0 fs/bcachefs/btree_io.c:1772 read_btree_roots+0x454/0xee0 fs/bcachefs/recovery.c:457 bch2_fs_recovery+0x7adb/0x9310 fs/bcachefs/recovery.c:785 bch2_fs_start+0x7b2/0xbd0 fs/bcachefs/super.c:1043 bch2_fs_open+0x135f/0x1670 fs/bcachefs/super.c:2102 bch2_mount+0x90d/0x1d90 fs/bcachefs/fs.c:1903 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3875 ia32_sys_call+0x3a9a/0x40a0 arch/x86/include/generated/asm/syscalls_32.h:22 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb4/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Local variable __req_desc.i created at: do_encrypt_sg fs/bcachefs/checksum.c:101 [inline] do_encrypt+0x8f9/0xc30 fs/bcachefs/checksum.c:127 gen_poly_key fs/bcachefs/checksum.c:190 [inline] bch2_checksum+0x21f/0x7c0 fs/bcachefs/checksum.c:226 CPU: 1 PID: 15218 Comm: syz-executor.3 Not tainted 6.9.0-rc6-syzkaller-00131-gf03359bca01b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
