[ 31.395652] BUG: Bad rss-counter state mm:0000000052af2e40 type:MM_FILEPAGES val:33 [ 31.396971] BUG: Bad rss-counter state mm:0000000052af2e40 type:MM_ANONPAGES val:22 [ 31.567102] ================================================================== [ 31.568009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.568953] Read of size 8 at addr ffff88800df3f880 by task sshd/219 [ 31.569903] [ 31.570125] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.570996] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.571984] Call Trace: [ 31.572308] <TASK> [ 31.572588] dump_stack_lvl+0x91/0xf0 [ 31.573081] print_report+0xcc/0x620 [ 31.573572] ? __virt_addr_valid+0x102/0x340 [ 31.574119] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.574733] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.575342] kasan_report+0xbe/0xf0 [ 31.575822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.576442] vma_interval_tree_remove+0xc75/0xec0 [ 31.577041] vma_prepare+0xc54/0x11a0 [ 31.577531] __split_vma+0x5af/0x950 [ 31.578009] ? __pfx___split_vma+0x10/0x10 [ 31.578529] ? find_held_lock+0x2c/0x110 [ 31.579052] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.579612] ? lock_is_held_type+0x9f/0x120 [ 31.580157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.580757] ? mtree_range_walk+0x632/0x900 [ 31.581314] ? mas_walk+0x5c7/0x7c0 [ 31.581802] do_vmi_munmap+0x1f1/0x2b0 [ 31.582292] mmap_region+0x1f9/0x2660 [ 31.582767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.583279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.583984] ? __pfx_lock_acquire+0x10/0x10 [ 31.584519] ? __pfx_mmap_region+0x10/0x10 [ 31.585051] ? security_mmap_addr+0x7d/0xa0 [ 31.585598] ? get_unmapped_area+0x1f5/0x3f0 [ 31.586150] do_mmap+0x854/0xf00 [ 31.586602] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.587109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.587678] ksys_mmap_pgoff+0x3af/0x500 [ 31.588199] do_syscall_64+0x3f/0x90 [ 31.588677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589332] RIP: 0033:0x7f629b980d82 [ 31.589792] 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 [ 31.591881] RSP: 002b:00007ffc34033278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.592786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f629b980d82 [ 31.593635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f629adba000 [ 31.594469] RBP: 00007f629adba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.595316] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564acf2b0980 [ 31.596151] R13: 00007ffc34033290 R14: 00007ffc340332c0 R15: 00007ffc34033620 [ 31.597012] </TASK> [ 31.597301] [ 31.597531] Allocated by task 212: [ 31.597960] kasan_save_stack+0x22/0x50 [ 31.598464] kasan_set_track+0x25/0x30 [ 31.598954] __kasan_slab_alloc+0x59/0x70 [ 31.599475] kmem_cache_alloc+0x16b/0x370 [ 31.599985] vm_area_dup+0x20/0x160 [ 31.600431] __split_vma+0x170/0x950 [ 31.600892] split_vma+0xc6/0x110 [ 31.601328] mprotect_fixup+0x8d2/0xb30 [ 31.601838] do_mprotect_pkey+0x87e/0xd40 [ 31.602349] __x64_sys_mprotect+0x78/0xc0 [ 31.602868] do_syscall_64+0x3f/0x90 [ 31.603344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.603983] [ 31.604199] Freed by task 19: [ 31.604579] kasan_save_stack+0x22/0x50 [ 31.605075] kasan_set_track+0x25/0x30 [ 31.605583] kasan_save_free_info+0x2b/0x50 [ 31.606113] __kasan_slab_free+0x10a/0x190 [ 31.606642] kmem_cache_free+0x10d/0x4d0 [ 31.607146] rcu_core+0x8c8/0x2860 [ 31.607582] __do_softirq+0x1b7/0x7d4 [ 31.608060] [ 31.608272] Last potentially related work creation: [ 31.608856] kasan_save_stack+0x22/0x50 [ 31.609349] __kasan_record_aux_stack+0x8e/0xa0 [ 31.609923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.610555] remove_vma+0x139/0x170 [ 31.611000] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.611679] do_vmi_munmap+0x1f1/0x2b0 [ 31.612170] __vm_munmap+0x138/0x3a0 [ 31.612631] __x64_sys_munmap+0x59/0x80 [ 31.613123] do_syscall_64+0x3f/0x90 [ 31.613615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614253] [ 31.614466] Second to last potentially related work creation: [ 31.615143] kasan_save_stack+0x22/0x50 [ 31.615641] __kasan_record_aux_stack+0x8e/0xa0 [ 31.616212] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.616845] remove_vma+0x139/0x170 [ 31.617297] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.617852] do_vmi_munmap+0x1f1/0x2b0 [ 31.618335] mmap_region+0x1f9/0x2660 [ 31.618807] do_mmap+0x854/0xf00 [ 31.619235] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.619721] ksys_mmap_pgoff+0x3af/0x500 [ 31.620224] do_syscall_64+0x3f/0x90 [ 31.620699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.621339] [ 31.621563] The buggy address belongs to the object at ffff88800df3f828 [ 31.621563] which belongs to the cache vm_area_struct of size 168 [ 31.623026] The buggy address is located 88 bytes inside of [ 31.623026] freed 168-byte region [ffff88800df3f828, ffff88800df3f8d0) [ 31.624410] [ 31.624622] The buggy address belongs to the physical page: [ 31.625268] page:00000000a19214a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf3f [ 31.626383] memcg:ffff88800c5f0801 [ 31.626815] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.627465] page_type: 0xffffffff() [ 31.627926] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.628846] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5f0801 [ 31.629768] page dumped because: kasan: bad access detected [ 31.630442] [ 31.630660] Memory state around the buggy address: [ 31.631248] ffff88800df3f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.632115] ffff88800df3f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.632964] >ffff88800df3f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.633840] ^ [ 31.634279] ffff88800df3f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.635156] ffff88800df3f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.636025] ================================================================== [ 31.637018] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.954309] BUG: Bad rss-counter state mm:00000000a8fa4a5a type:MM_FILEPAGES val:33 [ 33.955363] BUG: Bad rss-counter state mm:00000000a8fa4a5a type:MM_ANONPAGES val:22 [ 34.433280] BUG: Bad rss-counter state mm:00000000430d96ed type:MM_FILEPAGES val:33 [ 34.434286] BUG: Bad rss-counter state mm:00000000430d96ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38129' (ECDSA) to the list of known hosts. 2023/06/21 10:44:02 fuzzer started 2023/06/21 10:44:02 dialing manager at localhost:36067 2023/06/21 10:44:02 checking machine... 2023/06/21 10:44:02 checking revisions... [ 35.195236] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:44:02 testing simple program... [ 35.249155] cgroup: Unknown subsys name 'net' [ 35.285163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:44:02 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880192cbe20 RSP=ffff88801025f958 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88800ca1e780 R13=ffff88800ff2c000 R14=ffff88800ff2c080 R15=1ffff1100204bf33 RIP=ffffffff814c0404 RFL=00000246 [---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 00007f082990e900 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=00007fff53678000 CR3=00000000159b0000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f8fdbe9f9a0 CR3=0000000008c6e000 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=aa0e14769ef53eb10e4a689acc93b135 XMM02=000000000011ba68ec2efd57dc4c00df XMM03=000000000012204096f7d678d2dc60f7 XMM04=3c75f8b246d0fc0600000000000ae988 XMM05=0b19806a9580f3f100000000001340e0 XMM06=4fda316b135da52b0000000000132e10 XMM07=e042d86d42eb936e0000000000122318 XMM08=96f7d678d2dc60f7000000000011bac8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000