On Mon, Apr 29, 2024 at 05:16:57PM +0800, Ubisectech Sirius wrote: > > Hello, > > > Thanks for the report. Could you please provide a reproducer? > > > Regards, > > Mickaël > > Hi. > The Poc file has seed to you as attachment.
Indeed, but could you please trim down the file. There are 650 lines, most of them are irrelevant. > > > On Sun, Apr 28, 2024 at 10:47:02AM +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. > >> > >> Stack dump: > >> > > > loop3: detected capacity change from 0 to 1024 > > > ------------[ cut here ]------------ > > > WARNING: CPU: 0 PID: 30368 at security/landlock/fs.c:598 get_mode_access > > > security/landlock/fs.c:598 [inline] > > > WARNING: CPU: 0 PID: 30368 at security/landlock/fs.c:598 get_mode_access > > > security/landlock/fs.c:578 [inline] > > > WARNING: CPU: 0 PID: 30368 at security/landlock/fs.c:598 > > > current_check_refer_path+0x955/0xa60 security/landlock/fs.c:758 > > > Modules linked in: > > > CPU: 0 PID: 30368 Comm: syz-executor.3 Not tainted 6.7.0 #2 > > > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 > > > 04/01/2014 > > > RIP: 0010:get_mode_access security/landlock/fs.c:598 [inline] > > > RIP: 0010:get_mode_access security/landlock/fs.c:578 [inline] > > > RIP: 0010:current_check_refer_path+0x955/0xa60 security/landlock/fs.c:758 > > > Code: e9 76 fb ff ff 41 bc fe ff ff ff e9 6b fb ff ff e8 00 99 77 fd 90 > > > 0f 0b 90 41 bc f3 ff ff ff e9 57 fb ff ff e8 ec 98 77 fd 90 <0f> 0b 90 31 > > > db e9 86 f9 ff ff bb 00 08 00 00 e9 7c f9 ff ff 41 ba > > > RSP: 0018:ffffc90001fb7ba0 EFLAGS: 00010212 > > > RAX: 0000000000000bc5 RBX: ffff88805feeb7b0 RCX: ffffc90006e15000 > > > RDX: 0000000000040000 RSI: ffffffff84125d64 RDI: 0000000000000003 > > > RBP: ffff8880123c5608 R08: 0000000000000003 R09: 000000000000c000 > > > R10: 000000000000f000 R11: 0000000000000000 R12: ffff88805d32fc00 > > > R13: ffff8880123c5608 R14: 0000000000000000 R15: 0000000000000001 > > > FS: 00007fd70c4d8640(0000) GS:ffff88802c600000(0000) > > > knlGS:0000000000000000 > > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > > CR2: 0000001b2c136000 CR3: 000000005b2a0000 CR4: 0000000000750ef0 > > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > PKRU: 55555554 > > > Call Trace: > > > <TASK> > > > security_path_rename+0x124/0x230 security/security.c:1828 > > > do_renameat2+0x9f6/0xd30 fs/namei.c:4983 > > > __do_sys_rename fs/namei.c:5042 [inline] > > > __se_sys_rename fs/namei.c:5040 [inline] > > > __x64_sys_rename+0x81/0xa0 fs/namei.c:5040 > > > 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: 0033:0x7fd70b6900ed > > > Code: c3 e8 97 2b 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 > > > f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fd70c4d8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 > > > RAX: ffffffffffffffda RBX: 00007fd70b7cbf80 RCX: 00007fd70b6900ed > >> RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000100 > > > RBP: 00007fd70b6f14a6 R08: 0000000000000000 R09: 0000000000000000 > > > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > > > R13: 000000000000000b R14: 00007fd70b7cbf80 R15: 00007fd70c4b8000 > > > </TASK> > > > > > > Thank you for taking the time to read this email and we look forward to > > > working with you further. > > > > > > > > > > > > > > > > > > > > > > > > > >
