Hello, syzbot found the following issue on:
HEAD commit: ccb98ccef0e5 Merge tag 'platform-drivers-x86-v6.13-4' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13493818580000 kernel config: https://syzkaller.appspot.com/x/.config?x=31c2647cf06aa81e dashboard link: https://syzkaller.appspot.com/bug?extid=9b79c816ed3895539cf4 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/da86466e08c0/disk-ccb98cce.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/673316cfa30c/vmlinux-ccb98cce.xz kernel image: https://storage.googleapis.com/syzbot-assets/4d50a89ed2d4/bzImage-ccb98cce.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] ===================================================== BUG: KMSAN: uninit-value in bch2_inode_unpack_v3 fs/bcachefs/inode.c:274 [inline] BUG: KMSAN: uninit-value in bch2_inode_unpack+0x9fb/0x4ca0 fs/bcachefs/inode.c:331 bch2_inode_unpack_v3 fs/bcachefs/inode.c:274 [inline] bch2_inode_unpack+0x9fb/0x4ca0 fs/bcachefs/inode.c:331 bch2_inode_rm+0xdbc/0x1260 fs/bcachefs/inode.c:1042 bch2_evict_inode+0x2d5/0x6a0 fs/bcachefs/fs.c:1836 evict+0x723/0xd10 fs/inode.c:796 iput_final fs/inode.c:1946 [inline] iput+0x97b/0xdb0 fs/inode.c:1972 bch2_symlink+0x49f/0x540 fs/bcachefs/fs.c:821 vfs_symlink+0x1ed/0x460 fs/namei.c:4669 do_symlinkat+0x253/0x8b0 fs/namei.c:4695 __do_sys_symlink fs/namei.c:4716 [inline] __se_sys_symlink fs/namei.c:4714 [inline] __x64_sys_symlink+0xe0/0x140 fs/namei.c:4714 x64_sys_call+0x31ca/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:89 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: memcpy_u64s_small fs/bcachefs/util.h:393 [inline] bkey_reassemble fs/bcachefs/bkey.h:513 [inline] btree_key_cache_create fs/bcachefs/btree_key_cache.c:259 [inline] btree_key_cache_fill+0xd1a/0x3d60 fs/bcachefs/btree_key_cache.c:309 bch2_btree_path_traverse_cached+0x988/0xe20 fs/bcachefs/btree_key_cache.c:361 bch2_btree_path_traverse_one+0x749/0x47b0 fs/bcachefs/btree_iter.c:1159 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline] bch2_btree_iter_peek_slot+0x10b7/0x3950 fs/bcachefs/btree_iter.c:2629 __bch2_bkey_get_iter fs/bcachefs/btree_iter.h:575 [inline] bch2_bkey_get_iter fs/bcachefs/btree_iter.h:589 [inline] bch2_inode_rm+0x95d/0x1260 fs/bcachefs/inode.c:1027 bch2_evict_inode+0x2d5/0x6a0 fs/bcachefs/fs.c:1836 evict+0x723/0xd10 fs/inode.c:796 iput_final fs/inode.c:1946 [inline] iput+0x97b/0xdb0 fs/inode.c:1972 bch2_symlink+0x49f/0x540 fs/bcachefs/fs.c:821 vfs_symlink+0x1ed/0x460 fs/namei.c:4669 do_symlinkat+0x253/0x8b0 fs/namei.c:4695 __do_sys_symlink fs/namei.c:4716 [inline] __se_sys_symlink fs/namei.c:4714 [inline] __x64_sys_symlink+0xe0/0x140 fs/namei.c:4714 x64_sys_call+0x31ca/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:89 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4253 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4270 __do_kmalloc_node mm/slub.c:4286 [inline] __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4304 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:650 btree_bounce_alloc fs/bcachefs/btree_io.c:124 [inline] btree_node_sort+0x78a/0x1d30 fs/bcachefs/btree_io.c:323 bch2_btree_post_write_cleanup+0x1b0/0xf20 fs/bcachefs/btree_io.c:2248 bch2_btree_node_write+0x21c/0x2e0 fs/bcachefs/btree_io.c:2289 btree_node_write_if_need fs/bcachefs/btree_io.h:151 [inline] __btree_node_flush+0x606/0x680 fs/bcachefs/btree_trans_commit.c:252 bch2_btree_node_flush0+0x35/0x60 fs/bcachefs/btree_trans_commit.c:261 journal_flush_pins+0xce6/0x1780 fs/bcachefs/journal_reclaim.c:565 __bch2_journal_reclaim+0xda8/0x1670 fs/bcachefs/journal_reclaim.c:698 bch2_journal_reclaim_thread+0x18e/0x760 fs/bcachefs/journal_reclaim.c:740 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 CPU: 0 UID: 0 PID: 6027 Comm: syz.1.13 Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ===================================================== --- 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 [email protected]. 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
