[ 23.655254] BUG: Bad rss-counter state mm:000000009f557699 type:MM_FILEPAGES val:33 [ 23.656598] BUG: Bad rss-counter state mm:000000009f557699 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.831219] ================================================================== [ 23.832146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.833121] Read of size 8 at addr ffff888010058c20 by task sshd/218 [ 23.833940] [ 23.834162] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.835056] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.836067] Call Trace: [ 23.836392] [ 23.836689] dump_stack_lvl+0x91/0xf0 [ 23.837208] print_report+0xcc/0x620 [ 23.837740] ? __virt_addr_valid+0x102/0x340 [ 23.838322] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.838961] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.839599] kasan_report+0xbe/0xf0 [ 23.840094] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.840733] vma_interval_tree_remove+0xc75/0xec0 [ 23.841356] vma_prepare+0xc54/0x11a0 [ 23.841857] __split_vma+0x5af/0x950 [ 23.842354] ? __pfx___split_vma+0x10/0x10 [ 23.842894] ? find_held_lock+0x2c/0x110 [ 23.843431] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.844008] ? lock_is_held_type+0x9f/0x120 [ 23.844558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.845167] ? mtree_range_walk+0x632/0x900 [ 23.845734] ? mas_walk+0x5c7/0x7c0 [ 23.846212] do_vmi_munmap+0x1f1/0x2b0 [ 23.846706] mmap_region+0x1f9/0x2660 [ 23.847198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.847717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.848444] ? __pfx_lock_acquire+0x10/0x10 [ 23.848991] ? __pfx_mmap_region+0x10/0x10 [ 23.849526] ? security_mmap_addr+0x7d/0xa0 [ 23.850085] ? get_unmapped_area+0x1f5/0x3f0 [ 23.850652] do_mmap+0x854/0xf00 [ 23.851100] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.851602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.852179] ksys_mmap_pgoff+0x3af/0x500 [ 23.852694] do_syscall_64+0x3f/0x90 [ 23.853181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.853847] RIP: 0033:0x7f0677653d82 [ 23.854309] 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 [ 23.856464] RSP: 002b:00007ffe20b682d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.857370] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0677653d82 [ 23.858239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0676a8d000 [ 23.859078] RBP: 00007f0676a8d000 R08: 0000000000000009 R09: 0000000000001000 [ 23.859913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563398947ec0 [ 23.860748] R13: 00007ffe20b682f0 R14: 00007ffe20b68320 R15: 00007ffe20b68680 [ 23.861596] [ 23.861908] [ 23.862123] Allocated by task 211: [ 23.862554] kasan_save_stack+0x22/0x50 [ 23.863062] kasan_set_track+0x25/0x30 [ 23.863553] __kasan_slab_alloc+0x59/0x70 [ 23.864081] kmem_cache_alloc+0x16b/0x370 [ 23.864599] vm_area_dup+0x20/0x160 [ 23.865058] __split_vma+0x170/0x950 [ 23.865526] split_vma+0xc6/0x110 [ 23.865974] mprotect_fixup+0x8d2/0xb30 [ 23.866526] do_mprotect_pkey+0x87e/0xd40 [ 23.867046] __x64_sys_mprotect+0x78/0xc0 [ 23.867567] do_syscall_64+0x3f/0x90 [ 23.868043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.868689] [ 23.868907] Freed by task 211: [ 23.869298] kasan_save_stack+0x22/0x50 [ 23.869815] kasan_set_track+0x25/0x30 [ 23.870309] kasan_save_free_info+0x2b/0x50 [ 23.870852] __kasan_slab_free+0x10a/0x190 [ 23.871395] kmem_cache_free+0x10d/0x4d0 [ 23.871900] rcu_core+0x8c8/0x2860 [ 23.872349] __do_softirq+0x1b7/0x7d4 [ 23.872866] [ 23.873130] Last potentially related work creation: [ 23.873853] kasan_save_stack+0x22/0x50 [ 23.874474] __kasan_record_aux_stack+0x8e/0xa0 [ 23.875178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.875971] remove_vma+0x139/0x170 [ 23.876526] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.877222] do_vmi_munmap+0x1f1/0x2b0 [ 23.877832] __vm_munmap+0x138/0x3a0 [ 23.878398] __x64_sys_munmap+0x59/0x80 [ 23.879007] do_syscall_64+0x3f/0x90 [ 23.879589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.880375] [ 23.880639] Second to last potentially related work creation: [ 23.881474] kasan_save_stack+0x22/0x50 [ 23.882090] __kasan_record_aux_stack+0x8e/0xa0 [ 23.882789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.883574] remove_vma+0x139/0x170 [ 23.884126] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.884817] do_vmi_munmap+0x1f1/0x2b0 [ 23.885411] mmap_region+0x1f9/0x2660 [ 23.885999] do_mmap+0x854/0xf00 [ 23.886521] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.887122] ksys_mmap_pgoff+0x3af/0x500 [ 23.887737] do_syscall_64+0x3f/0x90 [ 23.888314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.889090] [ 23.889353] The buggy address belongs to the object at ffff888010058bc8 [ 23.889353] which belongs to the cache vm_area_struct of size 168 [ 23.891148] The buggy address is located 88 bytes inside of [ 23.891148] freed 168-byte region [ffff888010058bc8, ffff888010058c70) [ 23.892860] [ 23.893116] The buggy address belongs to the physical page: [ 23.893925] page:00000000750294fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10058 [ 23.895257] memcg:ffff88800ffea001 [ 23.895771] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.896550] page_type: 0xffffffff() [ 23.897099] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.898229] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffea001 [ 23.899330] page dumped because: kasan: bad access detected [ 23.900121] [ 23.900381] Memory state around the buggy address: [ 23.901086] ffff888010058b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.902115] ffff888010058b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.903150] >ffff888010058c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.904176] ^ [ 23.904807] ffff888010058c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.905855] ffff888010058d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.906869] ================================================================== [ 23.908170] Disabling lock debugging due to kernel taint [ 26.421178] BUG: Bad rss-counter state mm:00000000079bf12f type:MM_FILEPAGES val:33 [ 26.422115] BUG: Bad rss-counter state mm:00000000079bf12f type:MM_ANONPAGES val:22 [ 26.897391] BUG: Bad rss-counter state mm:00000000819170ed type:MM_FILEPAGES val:33 [ 26.898387] BUG: Bad rss-counter state mm:00000000819170ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18363' (ECDSA) to the list of known hosts. 2023/06/21 01:23:43 fuzzer started 2023/06/21 01:23:43 dialing manager at localhost:36067 2023/06/21 01:23:43 checking machine... 2023/06/21 01:23:43 checking revisions... [ 27.622444] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:23:43 testing simple program... [ 27.676389] cgroup: Unknown subsys name 'net' [ 27.717801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:23:43 Registers: info registers vcpu 0 RAX=1ffff1100d9c746f RBX=ffff88806ce3a360 RCX=ffffffff813780e4 RDX=1ffff1100d9c746c RSI=ffff88806ce09ee8 RDI=ffff88806ce09ef0 RBP=ffff88806ce3a378 RSP=ffff88806ce09e38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=dffffc0000000000 R14=0000000000000087 R15=ffff88806ce3a360 RIP=ffffffff81380c63 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 00007f757645d900 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=00007f7576a12650 CR3=000000000dcd8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffdffb389b8 CR3=0000000005482000 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=00007f27e3337510000055d5830a1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000