On Thu, May 09, 2024 at 02:26:24PM +0800, Ubisectech Sirius wrote: > Hello. > We are Ubisectech Sirius Team, the vulnerability lab of China ValiantSec. > Recently, our team has discovered a issue in Linux kernel 6.7. Attached to > the email were a PoC file of the issue.
This (and several of your others) are fixed in Linus's tree. > > Stack dump: > > bcachefs (loop1): mounting version 1.7: (unknown version) > opts=metadata_checksum=none,data_checksum=none,nojournal_transaction_names > ------------[ cut here ]------------ > kernel BUG at fs/bcachefs/buckets.h:114! > invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI > CPU: 1 PID: 9472 Comm: syz-executor.1 Not tainted 6.7.0 #2 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 > 04/01/2014 > RIP: 0010:bucket_gen fs/bcachefs/buckets.h:114 [inline] > RIP: 0010:ptr_stale+0x474/0x4e0 fs/bcachefs/buckets.h:188 > Code: 48 c7 c2 80 8c 1b 8b be 67 00 00 00 48 c7 c7 e0 8c 1b 8b c6 05 ea a6 72 > 0b 01 e8 57 55 9c fd e9 fb fc ff ff e8 9d 02 bd fd 90 <0f> 0b 48 89 04 24 e8 > 31 bb 13 fe 48 8b 04 24 e9 35 fc ff ff e8 23 > RSP: 0018:ffffc90007c4ec38 EFLAGS: 00010246 > RAX: 0000000000040000 RBX: 0000000000000080 RCX: ffffc90002679000 > RDX: 0000000000040000 RSI: ffffffff83ccf3b3 RDI: 0000000000000006 > RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000010000028 > R10: 0000000000000080 R11: 0000000000000000 R12: 0000000010000028 > R13: ffff88804dee5100 R14: 0000000000000000 R15: ffff88805b1a4110 > FS: 00007f79ba8ab640(0000) GS:ffff88807ec00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f0bbda3f000 CR3: 000000005f37a000 CR4: 0000000000750ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > PKRU: 55555554 > Call Trace: > <TASK> > bch2_bkey_ptrs_to_text+0xb4e/0x1760 fs/bcachefs/extents.c:1012 > bch2_btree_ptr_v2_to_text+0x288/0x330 fs/bcachefs/extents.c:215 > bch2_val_to_text fs/bcachefs/bkey_methods.c:287 [inline] > bch2_bkey_val_to_text+0x1c8/0x210 fs/bcachefs/bkey_methods.c:297 > journal_validate_key+0x7ab/0xb50 fs/bcachefs/journal_io.c:322 > journal_entry_btree_root_validate+0x31c/0x380 fs/bcachefs/journal_io.c:411 > bch2_journal_entry_validate+0xc7/0x130 fs/bcachefs/journal_io.c:752 > bch2_sb_clean_validate_late+0x14b/0x1e0 fs/bcachefs/sb-clean.c:32 > bch2_read_superblock_clean+0xbb/0x250 fs/bcachefs/sb-clean.c:160 > bch2_fs_recovery+0x113/0x52d0 fs/bcachefs/recovery.c:691 > bch2_fs_start+0x365/0x5e0 fs/bcachefs/super.c:978 > bch2_fs_open+0x1ac9/0x3890 fs/bcachefs/super.c:1968 > bch2_mount+0x538/0x13c0 fs/bcachefs/fs.c:1863 > legacy_get_tree+0x109/0x220 fs/fs_context.c:662 > vfs_get_tree+0x93/0x380 fs/super.c:1771 > do_new_mount fs/namespace.c:3337 [inline] > path_mount+0x679/0x1e40 fs/namespace.c:3664 > do_mount fs/namespace.c:3677 [inline] > __do_sys_mount fs/namespace.c:3886 [inline] > __se_sys_mount fs/namespace.c:3863 [inline] > __x64_sys_mount+0x287/0x310 fs/namespace.c:3863 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0x43/0x120 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x6f/0x77 > RIP: 0033:0x7f79b9a91b3e > Code: 48 c7 c0 ff ff ff ff eb aa e8 be 0d 00 00 66 2e 0f 1f 84 00 00 00 00 00 > 0f 1f 40 00 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 > 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f79ba8aae38 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 00000000000119f4 RCX: 00007f79b9a91b3e > RDX: 0000000020011a00 RSI: 0000000020011a40 RDI: 00007f79ba8aae90 > RBP: 00007f79ba8aaed0 R08: 00007f79ba8aaed0 R09: 000000000181c050 > R10: 000000000181c050 R11: 0000000000000202 R12: 0000000020011a00 > R13: 0000000020011a40 R14: 00007f79ba8aae90 R15: 00000000200001c0 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > > > Thank you for taking the time to read this email and we look forward to > working with you further. > > > > > >
