[ 30.908828] BUG: Bad rss-counter state mm:000000008c0d7853 type:MM_FILEPAGES val:33 [ 30.909919] BUG: Bad rss-counter state mm:000000008c0d7853 type:MM_ANONPAGES val:22 [ 31.073519] ================================================================== [ 31.074459] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.075406] Read of size 8 at addr ffff88800c9c8228 by task sshd/220 [ 31.076186] [ 31.076409] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.077430] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.078415] Call Trace: [ 31.078744] [ 31.079029] dump_stack_lvl+0x91/0xf0 [ 31.079525] print_report+0xcc/0x620 [ 31.080015] ? __virt_addr_valid+0x102/0x340 [ 31.080579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081232] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081882] kasan_report+0xbe/0xf0 [ 31.082375] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.083021] vma_interval_tree_remove+0xc75/0xec0 [ 31.083626] vma_prepare+0xc54/0x11a0 [ 31.084113] __split_vma+0x5af/0x950 [ 31.084589] ? __pfx___split_vma+0x10/0x10 [ 31.085117] ? find_held_lock+0x2c/0x110 [ 31.085669] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.086244] ? lock_is_held_type+0x9f/0x120 [ 31.086787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.087400] ? mtree_range_walk+0x632/0x900 [ 31.087992] ? mas_walk+0x5c7/0x7c0 [ 31.088493] do_vmi_munmap+0x1f1/0x2b0 [ 31.088990] mmap_region+0x1f9/0x2660 [ 31.089516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.090033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.090755] ? __pfx_lock_acquire+0x10/0x10 [ 31.091316] ? __pfx_mmap_region+0x10/0x10 [ 31.091877] ? security_mmap_addr+0x7d/0xa0 [ 31.092423] ? get_unmapped_area+0x1f5/0x3f0 [ 31.092980] do_mmap+0x854/0xf00 [ 31.093460] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.093980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.094556] ksys_mmap_pgoff+0x3af/0x500 [ 31.095081] do_syscall_64+0x3f/0x90 [ 31.095568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096228] RIP: 0033:0x7f31cfc84d82 [ 31.096691] 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 [ 31.098898] RSP: 002b:00007ffd95cb1c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.099827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31cfc84d82 [ 31.100683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31cf0be000 [ 31.101554] RBP: 00007f31cf0be000 R08: 0000000000000009 R09: 0000000000001000 [ 31.102399] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556659169ec0 [ 31.103244] R13: 00007ffd95cb1c70 R14: 00007ffd95cb1ca0 R15: 00007ffd95cb2000 [ 31.104104] [ 31.104398] [ 31.104627] Allocated by task 213: [ 31.105053] kasan_save_stack+0x22/0x50 [ 31.105602] kasan_set_track+0x25/0x30 [ 31.106103] __kasan_slab_alloc+0x59/0x70 [ 31.106629] kmem_cache_alloc+0x16b/0x370 [ 31.107147] vm_area_dup+0x20/0x160 [ 31.107608] __split_vma+0x170/0x950 [ 31.108078] split_vma+0xc6/0x110 [ 31.108524] mprotect_fixup+0x8d2/0xb30 [ 31.109045] do_mprotect_pkey+0x87e/0xd40 [ 31.109598] __x64_sys_mprotect+0x78/0xc0 [ 31.110123] do_syscall_64+0x3f/0x90 [ 31.110602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.111248] [ 31.111467] Freed by task 213: [ 31.111858] kasan_save_stack+0x22/0x50 [ 31.112363] kasan_set_track+0x25/0x30 [ 31.112859] kasan_save_free_info+0x2b/0x50 [ 31.113422] __kasan_slab_free+0x10a/0x190 [ 31.113959] kmem_cache_free+0x10d/0x4d0 [ 31.114472] rcu_core+0x8c8/0x2860 [ 31.114920] __do_softirq+0x1b7/0x7d4 [ 31.115401] [ 31.115625] Last potentially related work creation: [ 31.116223] kasan_save_stack+0x22/0x50 [ 31.116734] __kasan_record_aux_stack+0x8e/0xa0 [ 31.117346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.117994] remove_vma+0x139/0x170 [ 31.118451] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.119010] do_vmi_munmap+0x1f1/0x2b0 [ 31.119507] __vm_munmap+0x138/0x3a0 [ 31.119976] __x64_sys_munmap+0x59/0x80 [ 31.120474] do_syscall_64+0x3f/0x90 [ 31.120951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121624] [ 31.121849] Second to last potentially related work creation: [ 31.122527] kasan_save_stack+0x22/0x50 [ 31.123034] __kasan_record_aux_stack+0x8e/0xa0 [ 31.123614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.124257] remove_vma+0x139/0x170 [ 31.124712] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.125298] do_vmi_munmap+0x1f1/0x2b0 [ 31.125792] mmap_region+0x1f9/0x2660 [ 31.126288] do_mmap+0x854/0xf00 [ 31.126737] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.127234] ksys_mmap_pgoff+0x3af/0x500 [ 31.127747] do_syscall_64+0x3f/0x90 [ 31.128226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.128874] [ 31.129091] The buggy address belongs to the object at ffff88800c9c81d0 [ 31.129091] which belongs to the cache vm_area_struct of size 168 [ 31.130607] The buggy address is located 88 bytes inside of [ 31.130607] freed 168-byte region [ffff88800c9c81d0, ffff88800c9c8278) [ 31.132011] [ 31.132226] The buggy address belongs to the physical page: [ 31.132891] page:00000000b5eaf1b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9c8 [ 31.134016] memcg:ffff88800c9e9101 [ 31.134449] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.135105] page_type: 0xffffffff() [ 31.135563] raw: 0100000000000200 ffff88800879fc80 ffffea0000362400 dead000000000002 [ 31.136485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9e9101 [ 31.137429] page dumped because: kasan: bad access detected [ 31.138092] [ 31.138314] Memory state around the buggy address: [ 31.138897] ffff88800c9c8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.139760] ffff88800c9c8180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.140625] >ffff88800c9c8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.141527] ^ [ 31.142086] ffff88800c9c8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.142952] ffff88800c9c8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.143821] ================================================================== [ 31.145085] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.686883] BUG: Bad rss-counter state mm:00000000ef5d3113 type:MM_FILEPAGES val:33 [ 33.687874] BUG: Bad rss-counter state mm:00000000ef5d3113 type:MM_ANONPAGES val:22 [ 34.223945] BUG: Bad rss-counter state mm:00000000eb1b4c12 type:MM_FILEPAGES val:33 [ 34.225303] BUG: Bad rss-counter state mm:00000000eb1b4c12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14239' (ECDSA) to the list of known hosts. 2023/06/19 20:15:40 fuzzer started 2023/06/19 20:15:40 dialing manager at localhost:44161 2023/06/19 20:15:40 checking machine... 2023/06/19 20:15:40 checking revisions... [ 35.035994] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:15:40 testing simple program... [ 35.085511] cgroup: Unknown subsys name 'net' [ 35.135541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:15:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e8 RCX=0000000000000000 RDX=ffffffff81803a30 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800dab1780 RSP=ffff88801687f880 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008fce000 R13=ffff88800dab1780 R14=0000000000400cc0 R15=0000000000400cc0 RIP=ffffffff81374466 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 00007fbb8e536900 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=00007fbb8eaeb650 CR3=00000000187b8000 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=0000000000000000 RBX=ffff888016639800 RCX=ffffffff83653b1b RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880103ef968 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff888016639800 R13=ffff88800cc2cc80 R14=ffff8880103efa70 R15=0000000000000053 RIP=ffffffff814c0388 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 00007ff416bfc900 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=00007ff416081090 CR3=000000000c6e2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fe99510080ab898700000000000ae988 XMM05=735d4bb3f3dee5ba00000000001364c0 XMM06=4fda316b135da52b0000000000134f40 XMM07=fb795ef6d65770560000000000124168 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000