[ 29.929987] BUG: Bad rss-counter state mm:000000006cd86c7f type:MM_FILEPAGES val:33 [ 29.930704] BUG: Bad rss-counter state mm:000000006cd86c7f type:MM_ANONPAGES val:22 [ 30.151037] ================================================================== [ 30.151668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.152302] Read of size 8 at addr ffff88800d900df0 by task sshd/222 [ 30.152840] [ 30.152987] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.153591] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.160843] Call Trace: [ 30.161062] [ 30.161252] dump_stack_lvl+0x91/0xf0 [ 30.161588] print_report+0xcc/0x620 [ 30.161914] ? __virt_addr_valid+0x102/0x340 [ 30.162305] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.162707] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.163105] kasan_report+0xbe/0xf0 [ 30.163431] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.163838] vma_interval_tree_remove+0xc75/0xec0 [ 30.164232] vma_prepare+0xc54/0x11a0 [ 30.164588] __split_vma+0x5af/0x950 [ 30.164906] ? __pfx___split_vma+0x10/0x10 [ 30.165256] ? find_held_lock+0x2c/0x110 [ 30.165605] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.165963] ? lock_is_held_type+0x9f/0x120 [ 30.166310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.166710] ? mtree_range_walk+0x632/0x900 [ 30.167078] ? mas_walk+0x5c7/0x7c0 [ 30.167420] do_vmi_munmap+0x1f1/0x2b0 [ 30.167747] mmap_region+0x1f9/0x2660 [ 30.168066] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.168466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.172936] ? __pfx_lock_acquire+0x10/0x10 [ 30.173318] ? __pfx_mmap_region+0x10/0x10 [ 30.173687] ? security_mmap_addr+0x7d/0xa0 [ 30.174037] ? get_unmapped_area+0x1f5/0x3f0 [ 30.174398] do_mmap+0x854/0xf00 [ 30.174692] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.175021] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.175396] ksys_mmap_pgoff+0x3af/0x500 [ 30.175732] do_syscall_64+0x3f/0x90 [ 30.176054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.176537] RIP: 0033:0x7f033f9f2d82 [ 30.176842] 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 [ 30.178236] RSP: 002b:00007fff12e233f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.178823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f033f9f2d82 [ 30.179369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f033ee2c000 [ 30.179915] RBP: 00007f033ee2c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.180475] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561bd3332ec0 [ 30.181029] R13: 00007fff12e23410 R14: 00007fff12e23440 R15: 00007fff12e237a0 [ 30.181620] [ 30.181804] [ 30.181938] Allocated by task 212: [ 30.182211] kasan_save_stack+0x22/0x50 [ 30.182585] kasan_set_track+0x25/0x30 [ 30.182910] __kasan_slab_alloc+0x59/0x70 [ 30.183255] kmem_cache_alloc+0x16b/0x370 [ 30.183597] vm_area_dup+0x20/0x160 [ 30.183896] __split_vma+0x170/0x950 [ 30.184206] split_vma+0xc6/0x110 [ 30.184557] mprotect_fixup+0x8d2/0xb30 [ 30.184888] do_mprotect_pkey+0x87e/0xd40 [ 30.185228] __x64_sys_mprotect+0x78/0xc0 [ 30.185574] do_syscall_64+0x3f/0x90 [ 30.185890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.186343] [ 30.186485] Freed by task 211: [ 30.186742] kasan_save_stack+0x22/0x50 [ 30.187070] kasan_set_track+0x25/0x30 [ 30.187442] kasan_save_free_info+0x2b/0x50 [ 30.187794] __kasan_slab_free+0x10a/0x190 [ 30.188142] kmem_cache_free+0x10d/0x4d0 [ 30.188489] rcu_core+0x8c8/0x2860 [ 30.188791] __do_softirq+0x1b7/0x7d4 [ 30.189106] [ 30.189250] Last potentially related work creation: [ 30.189630] kasan_save_stack+0x22/0x50 [ 30.189965] __kasan_record_aux_stack+0x8e/0xa0 [ 30.190339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.190762] remove_vma+0x139/0x170 [ 30.191059] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.191450] do_vmi_munmap+0x1f1/0x2b0 [ 30.191771] __vm_munmap+0x138/0x3a0 [ 30.192078] __x64_sys_munmap+0x59/0x80 [ 30.192462] do_syscall_64+0x3f/0x90 [ 30.192786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.193209] [ 30.193353] Second to last potentially related work creation: [ 30.193794] kasan_save_stack+0x22/0x50 [ 30.194125] __kasan_record_aux_stack+0x8e/0xa0 [ 30.194503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.194923] remove_vma+0x139/0x170 [ 30.195218] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.195583] do_vmi_munmap+0x1f1/0x2b0 [ 30.195903] mmap_region+0x1f9/0x2660 [ 30.196238] do_mmap+0x854/0xf00 [ 30.196568] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.196888] ksys_mmap_pgoff+0x7d/0x500 [ 30.197204] do_syscall_64+0x3f/0x90 [ 30.197546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.197954] [ 30.198098] The buggy address belongs to the object at ffff88800d900d98 [ 30.198098] which belongs to the cache vm_area_struct of size 168 [ 30.199038] The buggy address is located 88 bytes inside of [ 30.199038] freed 168-byte region [ffff88800d900d98, ffff88800d900e40) [ 30.199937] [ 30.200081] The buggy address belongs to the physical page: [ 30.200578] page:00000000fbe3c934 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd900 [ 30.201272] memcg:ffff88800d814f01 [ 30.201560] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.201976] page_type: 0xffffffff() [ 30.202271] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389780 dead000000000002 [ 30.202865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d814f01 [ 30.203450] page dumped because: kasan: bad access detected [ 30.203878] [ 30.204022] Memory state around the buggy address: [ 30.204398] ffff88800d900c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.204983] ffff88800d900d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.205565] >ffff88800d900d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.206110] ^ [ 30.206638] ffff88800d900e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.207189] ffff88800d900e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.207738] ================================================================== [ 30.208777] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.831022] BUG: Bad rss-counter state mm:00000000f35fa042 type:MM_FILEPAGES val:33 [ 33.831591] BUG: Bad rss-counter state mm:00000000f35fa042 type:MM_ANONPAGES val:22 [ 34.580941] BUG: Bad rss-counter state mm:0000000052875b6d type:MM_FILEPAGES val:33 [ 34.581662] BUG: Bad rss-counter state mm:0000000052875b6d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2688' (ECDSA) to the list of known hosts. 2023/06/21 08:21:56 fuzzer started 2023/06/21 08:21:56 dialing manager at localhost:36067 2023/06/21 08:21:56 checking machine... 2023/06/21 08:21:56 checking revisions... [ 35.604598] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:21:56 testing simple program... [ 35.644800] cgroup: Unknown subsys name 'net' [ 35.678226] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:21:56 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801a730898 RCX=ffffffff8175cbdf RDX=ffffed10034e6114 RSI=0000000000000008 RDI=ffff88801a730898 RBP=ffff88801a7299f8 RSP=ffff88801432fbc8 R8 =0000000000000001 R9 =ffffed10034e6113 R10=ffff88801a73089f R11=0000000000000000 R12=800000001b4ba065 R13=000055946a113000 R14=ffff88801a729a08 R15=ffff888009a89280 RIP=ffffffff8175cbe2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1ec6088900 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=000055946a113f20 CR3=000000000edc6000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=000000000000011b RCX=00000000000046f7 RDX=1ffff9200000291b RSI=ffffffff821697d5 RDI=0000000000000006 RBP=fc00000000000000 RSP=ffff88800f33f9a8 R8 =0000000000000006 R9 =0000000000040000 R10=00000000000046f7 R11=00000000000b6a61 R12=0000000000040000 R13=ffffc90000014000 R14=00000000000008d8 R15=ffffc900000148d8 RIP=ffffffff82169814 RFL=00000086 [--S--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 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=00007f1ec64b8790 CR3=000000000e9ee000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=0d5fec62d136f5a30000000000000000 XMM05=3f504ff9af4cd95653f98d56844b2f04 XMM06=a3f88bcd9bee0d7aa6fe33805edfcea9 XMM07=16010e0b18b6407e88983f730b66d921 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000