Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.175227] BUG: Bad rss-counter state mm:00000000ca7e5dc5 type:MM_FILEPAGES val:33 [ 39.176411] BUG: Bad rss-counter state mm:00000000ca7e5dc5 type:MM_ANONPAGES val:22 [ 39.215387] ================================================================== [ 39.215920] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.217345] Read of size 8 at addr ffff88800c5654e0 by task sshd/231 [ 39.218375] [ 39.218664] CPU: 0 PID: 231 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.219797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.221083] Call Trace: [ 39.221504] [ 39.221875] dump_stack_lvl+0x91/0xf0 [ 39.222540] print_report+0xcc/0x620 [ 39.223174] ? __virt_addr_valid+0x102/0x340 [ 39.223900] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.224730] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.225552] kasan_report+0xbe/0xf0 [ 39.226251] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.226964] vma_interval_tree_remove+0xc75/0xec0 [ 39.227650] vma_prepare+0xc54/0x11a0 [ 39.228194] __split_vma+0x5af/0x950 [ 39.228730] ? __pfx___split_vma+0x10/0x10 [ 39.229341] ? find_held_lock+0x2c/0x110 [ 39.229940] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.230594] ? lock_is_held_type+0x9f/0x120 [ 39.231207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.231896] ? mtree_range_walk+0x632/0x900 [ 39.232533] ? mas_walk+0x5c7/0x7c0 [ 39.233078] do_vmi_munmap+0x1f1/0x2b0 [ 39.233635] mmap_region+0x1f9/0x2660 [ 39.234198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.234781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.235600] ? __pfx_lock_acquire+0x10/0x10 [ 39.236210] ? __pfx_mmap_region+0x10/0x10 [ 39.236821] ? security_mmap_addr+0x7d/0xa0 [ 39.237433] ? get_unmapped_area+0x1f5/0x3f0 [ 39.238085] do_mmap+0x854/0xf00 [ 39.238588] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.239154] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.239794] ksys_mmap_pgoff+0x3af/0x500 [ 39.240373] do_syscall_64+0x3f/0x90 [ 39.240945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.241680] RIP: 0033:0x7fdc4ee01d82 [ 39.242213] 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 [ 39.244660] RSP: 002b:00007ffc8c6b2928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.245702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc4ee01d82 [ 39.246674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc4e23b000 [ 39.247655] RBP: 00007fdc4e23b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.248624] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574ea4f8ec0 [ 39.249586] R13: 00007ffc8c6b2940 R14: 00007ffc8c6b2970 R15: 00007ffc8c6b2cd0 [ 39.250587] [ 39.250926] [ 39.251172] Allocated by task 224: [ 39.251666] kasan_save_stack+0x22/0x50 [ 39.252246] kasan_set_track+0x25/0x30 [ 39.252804] __kasan_slab_alloc+0x59/0x70 [ 39.253405] kmem_cache_alloc+0x16b/0x370 [ 39.253998] vm_area_dup+0x20/0x160 [ 39.254524] __split_vma+0x170/0x950 [ 39.255058] split_vma+0xc6/0x110 [ 39.255564] mprotect_fixup+0x8d2/0xb30 [ 39.256145] do_mprotect_pkey+0x87e/0xd40 [ 39.256745] __x64_sys_mprotect+0x78/0xc0 [ 39.257345] do_syscall_64+0x3f/0x90 [ 39.257887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.258633] [ 39.258881] Freed by task 224: [ 39.259332] kasan_save_stack+0x22/0x50 [ 39.259911] kasan_set_track+0x25/0x30 [ 39.260481] kasan_save_free_info+0x2b/0x50 [ 39.261090] __kasan_slab_free+0x10a/0x190 [ 39.261703] kmem_cache_free+0x10d/0x4d0 [ 39.262302] rcu_core+0x8c8/0x2860 [ 39.262808] __do_softirq+0x1b7/0x7d4 [ 39.263362] [ 39.263607] Last potentially related work creation: [ 39.264272] kasan_save_stack+0x22/0x50 [ 39.264850] __kasan_record_aux_stack+0x8e/0xa0 [ 39.265509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.266249] remove_vma+0x139/0x170 [ 39.266767] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.267403] do_vmi_munmap+0x1f1/0x2b0 [ 39.267959] __vm_munmap+0x138/0x3a0 [ 39.268485] __x64_sys_munmap+0x59/0x80 [ 39.269067] do_syscall_64+0x3f/0x90 [ 39.269612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.270359] [ 39.270604] Second to last potentially related work creation: [ 39.271397] kasan_save_stack+0x22/0x50 [ 39.271977] __kasan_record_aux_stack+0x8e/0xa0 [ 39.272633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.273380] remove_vma+0x139/0x170 [ 39.273903] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.274544] do_vmi_munmap+0x1f1/0x2b0 [ 39.275101] mmap_region+0x1f9/0x2660 [ 39.275656] do_mmap+0x854/0xf00 [ 39.276148] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.276714] ksys_mmap_pgoff+0x3af/0x500 [ 39.277289] do_syscall_64+0x3f/0x90 [ 39.277833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.278588] [ 39.278837] The buggy address belongs to the object at ffff88800c565488 [ 39.278837] which belongs to the cache vm_area_struct of size 168 [ 39.280513] The buggy address is located 88 bytes inside of [ 39.280513] freed 168-byte region [ffff88800c565488, ffff88800c565530) [ 39.282129] [ 39.282388] The buggy address belongs to the physical page: [ 39.283137] page:000000001e50ad08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc565 [ 39.284353] memcg:ffff88800dbdf801 [ 39.284823] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.285537] page_type: 0xffffffff() [ 39.286044] raw: 0100000000000200 ffff88800879fc80 ffffea00003ba480 dead000000000002 [ 39.287065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbdf801 [ 39.288068] page dumped because: kasan: bad access detected [ 39.288799] [ 39.289039] Memory state around the buggy address: [ 39.289687] ffff88800c565380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.290673] ffff88800c565400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.291626] >ffff88800c565480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.292595] ^ [ 39.293458] ffff88800c565500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.294449] ffff88800c565580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.295429] ================================================================== [ 39.297007] Disabling lock debugging due to kernel taint [ 41.871326] BUG: Bad rss-counter state mm:00000000d568a471 type:MM_FILEPAGES val:33 [ 41.872622] BUG: Bad rss-counter state mm:00000000d568a471 type:MM_ANONPAGES val:22 [ 42.216150] BUG: Bad rss-counter state mm:00000000ebdd4585 type:MM_FILEPAGES val:33 [ 42.217401] BUG: Bad rss-counter state mm:00000000ebdd4585 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21879' (ECDSA) to the list of known hosts. 2023/06/20 02:33:16 fuzzer started 2023/06/20 02:33:16 dialing manager at localhost:44161 2023/06/20 02:33:16 checking machine... 2023/06/20 02:33:16 checking revisions... [ 42.938214] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:33:17 testing simple program... [ 42.990135] cgroup: Unknown subsys name 'net' [ 43.062688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=ffff88806ce361a0 RDX=0000000000000000 RSI=1ffff1100d9c6c3e RDI=ffff88806ce361f0 RBP=ffff8880094aff80 RSP=ffff888016a4f770 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000dc8 R13=ffffffff87b67200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81830606 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 00007f0cca976900 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=00007f0ccaf2b650 CR3=000000001ce1e000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffe16322cf8 CR3=00000000143ce000 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=2036313a33333a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3034 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3034325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000