netlink: 830 bytes leftover after parsing attributes in process `syz.0.0'. loop0: detected capacity change from 0 to 40427 f2fs: Unknown parameter 'alloc_mod !žQ¶V3e' read_mapping_page failed! ERROR: (device loop0): txCommit: read_mapping_page failed! ERROR: (device loop0): txCommit: ================================================================== BUG: KFENCE: out-of-bounds read in dtSplitPage+0x10f9/0x37c0 fs/jfs/jfs_dtree.c:-1 Out-of-bounds read at 0xffff88805b24900d (2229B right of kfence-#35): dtSplitPage+0x10f9/0x37c0 fs/jfs/jfs_dtree.c:-1 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0x10a4/0x5f10 fs/jfs/jfs_dtree.c:871 jfs_create+0x75b/0xb10 fs/jfs/namei.c:137 lookup_open fs/namei.c:4449 [inline] open_last_lookups fs/namei.c:4549 [inline] path_openat+0x18dd/0x3e20 fs/namei.c:4793 do_filp_open+0x22d/0x490 fs/namei.c:4823 do_sys_openat2+0x12f/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f kfence-#35: 0xffff88805b248758-0xffff88805b248fff, size=2216, cache=jfs_ip allocated by task 5319 on cpu 0 at 74.890980s (0.140377s ago): jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x6a/0x1b0 fs/inode.c:346 iget_locked+0x131/0x6a0 fs/inode.c:1470 jfs_iget+0x24/0x470 fs/jfs/inode.c:29 jfs_lookup+0x220/0x420 fs/jfs/namei.c:1469 __lookup_slow+0x2b7/0x410 fs/namei.c:1866 lookup_slow+0x53/0x70 fs/namei.c:1883 walk_component fs/namei.c:2229 [inline] link_path_walk+0xd1e/0x18d0 fs/namei.c:2597 path_parentat fs/namei.c:2801 [inline] __filename_parentat+0x27f/0x6f0 fs/namei.c:2825 filename_parentat fs/namei.c:2843 [inline] do_renameat2+0x22a/0x900 fs/namei.c:6002 __do_sys_renameat2 fs/namei.c:6086 [inline] __se_sys_renameat2 fs/namei.c:6083 [inline] __x64_sys_renameat2+0xce/0xe0 fs/namei.c:6083 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:dtSplitPage+0x10f9/0x37c0 fs/jfs/jfs_dtree.c:-1 Code: fe 41 c1 e5 05 4c 03 ac 24 c8 00 00 00 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 39 01 00 00 <45> 0f b6 7d 00 4d 85 f6 75 20 e8 98 7a 6d fe 41 0f b7 c7 44 69 f8 RSP: 0018:ffffc90009bef1a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 0000000000000002 RSI: 0000000000200000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffff888000aba4c0 R09: 0000000000000002 R10: 0000000000000004 R11: 0000000000000002 R12: 0000000000000001 R13: ffff88805b24900d R14: 0000000000200000 R15: 0000000000000001 FS: 00007f1b737756c0(0000) GS:ffff88808ccea000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88805b24900d CR3: 00000000401d2000 CR4: 0000000000352ef0 Call Trace: dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0x10a4/0x5f10 fs/jfs/jfs_dtree.c:871 jfs_create+0x75b/0xb10 fs/jfs/namei.c:137 lookup_open fs/namei.c:4449 [inline] open_last_lookups fs/namei.c:4549 [inline] path_openat+0x18dd/0x3e20 fs/namei.c:4793 do_filp_open+0x22d/0x490 fs/namei.c:4823 do_sys_openat2+0x12f/0x220 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1b7299aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1b73775028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f1b72c15fa0 RCX: 00007f1b7299aeb9 RDX: 0000000000008d41 RSI: 0000200000000340 RDI: ffffffffffffff9c RBP: 00007f1b72a08c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000043 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1b72c16038 R14: 00007f1b72c15fa0 R15: 00007ffdcd198118 ================================================================== ---------------- Code disassembly (best guess): 0: fe 41 c1 incb -0x3f(%rcx) 3: e5 05 in $0x5,%eax 5: 4c 03 ac 24 c8 00 00 add 0xc8(%rsp),%r13 c: 00 d: 4c 89 e8 mov %r13,%rax 10: 48 c1 e8 03 shr $0x3,%rax 14: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 1b: fc ff df 1e: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax 22: 84 c0 test %al,%al 24: 0f 85 39 01 00 00 jne 0x163 * 2a: 45 0f b6 7d 00 movzbl 0x0(%r13),%r15d <-- trapping instruction 2f: 4d 85 f6 test %r14,%r14 32: 75 20 jne 0x54 34: e8 98 7a 6d fe call 0xfe6d7ad1 39: 41 0f b7 c7 movzwl %r15w,%eax 3d: 44 rex.R 3e: 69 .byte 0x69 3f: f8 clc