Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.262050] BUG: Bad rss-counter state mm:0000000015d651ee type:MM_FILEPAGES val:33 [ 31.263165] BUG: Bad rss-counter state mm:0000000015d651ee type:MM_ANONPAGES val:22 [ 31.424375] ================================================================== [ 31.425529] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.426715] Read of size 8 at addr ffff888018c146b0 by task sshd/220 [ 31.427764] [ 31.427999] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.428921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.429977] Call Trace: [ 31.430319] [ 31.430623] dump_stack_lvl+0x91/0xf0 [ 31.431149] print_report+0xcc/0x620 [ 31.431663] ? __virt_addr_valid+0x102/0x340 [ 31.432263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.432923] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.433558] kasan_report+0xbe/0xf0 [ 31.434053] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.434699] vma_interval_tree_remove+0xc75/0xec0 [ 31.435343] vma_prepare+0xc54/0x11a0 [ 31.435864] __split_vma+0x5af/0x950 [ 31.436365] ? __pfx___split_vma+0x10/0x10 [ 31.436922] ? find_held_lock+0x2c/0x110 [ 31.437463] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.438053] ? lock_is_held_type+0x9f/0x120 [ 31.438624] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.439259] ? mtree_range_walk+0x632/0x900 [ 31.439861] ? mas_walk+0x5c7/0x7c0 [ 31.440357] do_vmi_munmap+0x1f1/0x2b0 [ 31.440870] mmap_region+0x1f9/0x2660 [ 31.441370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.441908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.442669] ? __pfx_lock_acquire+0x10/0x10 [ 31.443218] ? __pfx_mmap_region+0x10/0x10 [ 31.443775] ? security_mmap_addr+0x7d/0xa0 [ 31.444326] ? get_unmapped_area+0x1f5/0x3f0 [ 31.444902] do_mmap+0x854/0xf00 [ 31.445360] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.445888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.446493] ksys_mmap_pgoff+0x3af/0x500 [ 31.447032] do_syscall_64+0x3f/0x90 [ 31.447540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.448259] RIP: 0033:0x7f7ef029cd82 [ 31.448750] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.451003] RSP: 002b:00007ffcb230e538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.451992] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ef029cd82 [ 31.452893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7eef6d6000 [ 31.453801] RBP: 00007f7eef6d6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.454709] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd88662d90 [ 31.455624] R13: 00007ffcb230e550 R14: 00007ffcb230e580 R15: 00007ffcb230e8e0 [ 31.456539] [ 31.456848] [ 31.457079] Allocated by task 213: [ 31.457534] kasan_save_stack+0x22/0x50 [ 31.458070] kasan_set_track+0x25/0x30 [ 31.458589] __kasan_slab_alloc+0x59/0x70 [ 31.459149] kmem_cache_alloc+0x16b/0x370 [ 31.459687] vm_area_dup+0x20/0x160 [ 31.460183] __split_vma+0x170/0x950 [ 31.460678] split_vma+0xc6/0x110 [ 31.461139] mprotect_fixup+0x8d2/0xb30 [ 31.461664] do_mprotect_pkey+0x87e/0xd40 [ 31.462216] __x64_sys_mprotect+0x78/0xc0 [ 31.462768] do_syscall_64+0x3f/0x90 [ 31.463264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.463956] [ 31.464182] Freed by task 19: [ 31.464593] kasan_save_stack+0x22/0x50 [ 31.465136] kasan_set_track+0x25/0x30 [ 31.465664] kasan_save_free_info+0x2b/0x50 [ 31.466224] __kasan_slab_free+0x10a/0x190 [ 31.466780] kmem_cache_free+0x10d/0x4d0 [ 31.467316] rcu_core+0x8c8/0x2860 [ 31.467802] __do_softirq+0x1b7/0x7d4 [ 31.468305] [ 31.468617] Last potentially related work creation: [ 31.469233] kasan_save_stack+0x22/0x50 [ 31.469776] __kasan_record_aux_stack+0x8e/0xa0 [ 31.470387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.471080] remove_vma+0x139/0x170 [ 31.471574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.472186] do_vmi_munmap+0x1f1/0x2b0 [ 31.472705] __vm_munmap+0x138/0x3a0 [ 31.473204] __x64_sys_munmap+0x59/0x80 [ 31.473729] do_syscall_64+0x3f/0x90 [ 31.474237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.474927] [ 31.475150] The buggy address belongs to the object at ffff888018c14658 [ 31.475150] which belongs to the cache vm_area_struct of size 168 [ 31.476733] The buggy address is located 88 bytes inside of [ 31.476733] freed 168-byte region [ffff888018c14658, ffff888018c14700) [ 31.478230] [ 31.478452] The buggy address belongs to the physical page: [ 31.479161] page:000000000607789b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c14 [ 31.480337] memcg:ffff88800f1ad501 [ 31.480786] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.481471] page_type: 0xffffffff() [ 31.481956] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.482947] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1ad501 [ 31.483932] page dumped because: kasan: bad access detected [ 31.484643] [ 31.484873] Memory state around the buggy address: [ 31.485494] ffff888018c14580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.486413] ffff888018c14600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.487340] >ffff888018c14680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.488275] ^ [ 31.488894] ffff888018c14700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.489818] ffff888018c14780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.490750] ================================================================== [ 31.491753] Disabling lock debugging due to kernel taint [ 34.101123] BUG: Bad rss-counter state mm:0000000089252e88 type:MM_FILEPAGES val:33 [ 34.102385] BUG: Bad rss-counter state mm:0000000089252e88 type:MM_ANONPAGES val:22 [ 34.568137] BUG: Bad rss-counter state mm:00000000d8b44e93 type:MM_FILEPAGES val:33 [ 34.569934] BUG: Bad rss-counter state mm:00000000d8b44e93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23940' (ECDSA) to the list of known hosts. 2023/06/20 17:09:03 fuzzer started 2023/06/20 17:09:03 dialing manager at localhost:36067 2023/06/20 17:09:03 checking machine... 2023/06/20 17:09:03 checking revisions... [ 35.345524] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:09:03 testing simple program... [ 35.393385] cgroup: Unknown subsys name 'net' [ 35.453208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd66a36bf80 CR3=000000000f1e2000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2033303a39303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880176b7a30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000246 R13=0000000000000000 R14=0000000000000001 R15=0000000000000024 RIP=ffffffff8180f189 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9bc226d900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcefd3c000 CR3=000000001ce1e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000