[ 39.979891] BUG: Bad rss-counter state mm:000000008a717118 type:MM_FILEPAGES val:33 [ 39.981114] BUG: Bad rss-counter state mm:000000008a717118 type:MM_ANONPAGES val:22 [ 40.018521] ================================================================== [ 40.019476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.020500] Read of size 8 at addr ffff88800de09228 by task sshd/219 [ 40.021266] [ 40.021483] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.022371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.023332] Call Trace: [ 40.023655] [ 40.023944] dump_stack_lvl+0x91/0xf0 [ 40.024446] print_report+0xcc/0x620 [ 40.024928] ? __virt_addr_valid+0x102/0x340 [ 40.025478] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.026097] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.026713] kasan_report+0xbe/0xf0 [ 40.027194] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.027813] vma_interval_tree_remove+0xc75/0xec0 [ 40.028429] vma_prepare+0xc54/0x11a0 [ 40.028909] __split_vma+0x5af/0x950 [ 40.029393] ? __pfx___split_vma+0x10/0x10 [ 40.029921] ? find_held_lock+0x2c/0x110 [ 40.030446] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.031013] ? lock_is_held_type+0x9f/0x120 [ 40.031552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.032177] ? mtree_range_walk+0x632/0x900 [ 40.032736] ? mas_walk+0x5c7/0x7c0 [ 40.033209] do_vmi_munmap+0x1f1/0x2b0 [ 40.033702] mmap_region+0x1f9/0x2660 [ 40.034178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.034687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.035409] ? __pfx_lock_acquire+0x10/0x10 [ 40.035941] ? __pfx_mmap_region+0x10/0x10 [ 40.036478] ? security_mmap_addr+0x7d/0xa0 [ 40.037030] ? get_unmapped_area+0x1f5/0x3f0 [ 40.037580] do_mmap+0x854/0xf00 [ 40.038023] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.038521] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.039090] ksys_mmap_pgoff+0x3af/0x500 [ 40.039601] do_syscall_64+0x3f/0x90 [ 40.040074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.040751] RIP: 0033:0x7fe3c1d59d82 [ 40.041205] 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 [ 40.043389] RSP: 002b:00007fff21a7bfa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.044317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3c1d59d82 [ 40.045173] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3c1193000 [ 40.046045] RBP: 00007fe3c1193000 R08: 0000000000000009 R09: 0000000000001000 [ 40.046918] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558558887d90 [ 40.047761] R13: 00007fff21a7bfc0 R14: 00007fff21a7bff0 R15: 00007fff21a7c350 [ 40.048661] [ 40.048959] [ 40.049178] Allocated by task 212: [ 40.049606] kasan_save_stack+0x22/0x50 [ 40.050121] kasan_set_track+0x25/0x30 [ 40.050619] __kasan_slab_alloc+0x59/0x70 [ 40.051167] kmem_cache_alloc+0x16b/0x370 [ 40.051688] vm_area_dup+0x20/0x160 [ 40.052154] __split_vma+0x170/0x950 [ 40.052632] split_vma+0xc6/0x110 [ 40.053078] mprotect_fixup+0x8d2/0xb30 [ 40.053580] do_mprotect_pkey+0x87e/0xd40 [ 40.054103] __x64_sys_mprotect+0x78/0xc0 [ 40.054629] do_syscall_64+0x3f/0x90 [ 40.055108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.055759] [ 40.055972] Freed by task 212: [ 40.056391] kasan_save_stack+0x22/0x50 [ 40.056898] kasan_set_track+0x25/0x30 [ 40.057389] kasan_save_free_info+0x2b/0x50 [ 40.057926] __kasan_slab_free+0x10a/0x190 [ 40.058468] kmem_cache_free+0x10d/0x4d0 [ 40.058978] rcu_core+0x8c8/0x2860 [ 40.059436] __do_softirq+0x1b7/0x7d4 [ 40.059924] [ 40.060156] Last potentially related work creation: [ 40.060747] kasan_save_stack+0x22/0x50 [ 40.061259] __kasan_record_aux_stack+0x8e/0xa0 [ 40.061846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.062507] remove_vma+0x139/0x170 [ 40.062957] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.063529] do_vmi_munmap+0x1f1/0x2b0 [ 40.064026] __vm_munmap+0x138/0x3a0 [ 40.064502] __x64_sys_munmap+0x59/0x80 [ 40.065006] do_syscall_64+0x3f/0x90 [ 40.065486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.066148] [ 40.066368] Second to last potentially related work creation: [ 40.067053] kasan_save_stack+0x22/0x50 [ 40.067569] __kasan_record_aux_stack+0x8e/0xa0 [ 40.068156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.068799] remove_vma+0x139/0x170 [ 40.069260] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.069828] do_vmi_munmap+0x1f1/0x2b0 [ 40.070330] mmap_region+0x1f9/0x2660 [ 40.070815] do_mmap+0x854/0xf00 [ 40.071261] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.071761] ksys_mmap_pgoff+0x3af/0x500 [ 40.072294] do_syscall_64+0x3f/0x90 [ 40.072768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.073421] [ 40.073638] The buggy address belongs to the object at ffff88800de091d0 [ 40.073638] which belongs to the cache vm_area_struct of size 168 [ 40.075146] The buggy address is located 88 bytes inside of [ 40.075146] freed 168-byte region [ffff88800de091d0, ffff88800de09278) [ 40.076581] [ 40.076799] The buggy address belongs to the physical page: [ 40.077471] page:00000000f8f445cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde09 [ 40.078570] memcg:ffff88800d5eaf01 [ 40.079005] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.079727] page_type: 0xffffffff() [ 40.080210] raw: 0100000000000200 ffff88800879fc80 ffffea00003a31c0 dead000000000003 [ 40.081172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5eaf01 [ 40.082105] page dumped because: kasan: bad access detected [ 40.082784] [ 40.083007] Memory state around the buggy address: [ 40.083609] ffff88800de09100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.084510] ffff88800de09180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.085414] >ffff88800de09200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.086303] ^ [ 40.086895] ffff88800de09280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 40.087811] ffff88800de09300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 40.088726] ================================================================== [ 40.089917] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 42.084894] BUG: Bad rss-counter state mm:00000000c3fd8b09 type:MM_FILEPAGES val:33 [ 42.085861] BUG: Bad rss-counter state mm:00000000c3fd8b09 type:MM_ANONPAGES val:22 [ 42.602190] BUG: Bad rss-counter state mm:00000000cf35c57c type:MM_FILEPAGES val:33 [ 42.603178] BUG: Bad rss-counter state mm:00000000cf35c57c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46777' (ECDSA) to the list of known hosts. 2023/06/19 16:44:43 fuzzer started 2023/06/19 16:44:43 dialing manager at localhost:44161 2023/06/19 16:44:43 checking machine... 2023/06/19 16:44:43 checking revisions... [ 43.241011] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:44:43 testing simple program... [ 43.284045] cgroup: Unknown subsys name 'net' [ 43.324958] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:44:27 Registers: info registers vcpu 0 RAX=ffff7fffffffffff RBX=0000000000000000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11001e20ee6 RSP=ffff88800f107700 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0030733a745f6c65 R12=ffffffff8560b640 R13=ffffffff81f3a567 R14=ffff88800bbd40ec R15=000000000000001e RIP=ffffffff8180eef9 RFL=00000216 [----AP-] 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 00007efead5dc700 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=00007ffd23abc000 CR3=000000000dac4000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732032343a3434 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343331 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007f665574b0a0 CR3=0000000009546000 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=00000000000000000000000000000000 XMM01=13472b1670ef98b0de45573807cafd37 XMM02=ec2efd57dc4c00df0000000000120280 XMM03=7efdc15ee56696930000000000120350 XMM04=a51b6f4ea3f0a7fc00000000000ae988 XMM05=dfcdbad4f1609c370000000000134b18 XMM06=32e6fd3cab2a3b440000000000133cf0 XMM07=e042d86d42eb936e0000000000124270 XMM08=7efdc15ee56696930000000000120350 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000