[ 35.030544] BUG: Bad rss-counter state mm:00000000d6bcb4f1 type:MM_FILEPAGES val:33 [ 35.031603] BUG: Bad rss-counter state mm:00000000d6bcb4f1 type:MM_ANONPAGES val:22 [ 35.194191] ================================================================== [ 35.195422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.196489] Read of size 8 at addr ffff88800ea26b38 by task sshd/218 [ 35.197389] [ 35.197608] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.198505] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.199556] Call Trace: [ 35.199882] [ 35.200175] dump_stack_lvl+0x91/0xf0 [ 35.200679] print_report+0xcc/0x620 [ 35.201173] ? __virt_addr_valid+0x102/0x340 [ 35.201751] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.202380] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.203041] kasan_report+0xbe/0xf0 [ 35.203545] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.204217] vma_interval_tree_remove+0xc75/0xec0 [ 35.204867] vma_prepare+0xc54/0x11a0 [ 35.205379] __split_vma+0x5af/0x950 [ 35.205889] ? __pfx___split_vma+0x10/0x10 [ 35.206456] ? find_held_lock+0x2c/0x110 [ 35.207035] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.207646] ? lock_is_held_type+0x9f/0x120 [ 35.208228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.208876] ? mtree_range_walk+0x632/0x900 [ 35.209470] ? mas_walk+0x5c7/0x7c0 [ 35.209975] do_vmi_munmap+0x1f1/0x2b0 [ 35.210491] mmap_region+0x1f9/0x2660 [ 35.211025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.211578] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.212352] ? __pfx_lock_acquire+0x10/0x10 [ 35.212925] ? __pfx_mmap_region+0x10/0x10 [ 35.213498] ? security_mmap_addr+0x7d/0xa0 [ 35.214071] ? get_unmapped_area+0x1f5/0x3f0 [ 35.214669] do_mmap+0x854/0xf00 [ 35.215160] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.215696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.216300] ksys_mmap_pgoff+0x3af/0x500 [ 35.216849] do_syscall_64+0x3f/0x90 [ 35.217361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.218050] RIP: 0033:0x7fc407506d82 [ 35.218549] 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 [ 35.220846] RSP: 002b:00007fff859ee5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.221832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc407506d82 [ 35.222668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc406940000 [ 35.223616] RBP: 00007fc406940000 R08: 0000000000000009 R09: 0000000000001000 [ 35.224517] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594bc814ec0 [ 35.225378] R13: 00007fff859ee5c0 R14: 00007fff859ee5f0 R15: 00007fff859ee950 [ 35.226242] [ 35.226538] [ 35.226755] Allocated by task 210: [ 35.227202] kasan_save_stack+0x22/0x50 [ 35.227721] kasan_set_track+0x25/0x30 [ 35.228241] __kasan_slab_alloc+0x59/0x70 [ 35.228805] kmem_cache_alloc+0x16b/0x370 [ 35.229366] vm_area_dup+0x20/0x160 [ 35.229853] __split_vma+0x170/0x950 [ 35.230356] split_vma+0xc6/0x110 [ 35.230850] mprotect_fixup+0x8d2/0xb30 [ 35.231400] do_mprotect_pkey+0x87e/0xd40 [ 35.231956] __x64_sys_mprotect+0x78/0xc0 [ 35.232521] do_syscall_64+0x3f/0x90 [ 35.233033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.233720] [ 35.233953] Freed by task 19: [ 35.234370] kasan_save_stack+0x22/0x50 [ 35.234930] kasan_set_track+0x25/0x30 [ 35.235469] kasan_save_free_info+0x2b/0x50 [ 35.236049] __kasan_slab_free+0x10a/0x190 [ 35.236624] kmem_cache_free+0x10d/0x4d0 [ 35.237172] rcu_core+0x8c8/0x2860 [ 35.237654] __do_softirq+0x1b7/0x7d4 [ 35.238170] [ 35.238408] Last potentially related work creation: [ 35.239063] kasan_save_stack+0x22/0x50 [ 35.239606] __kasan_record_aux_stack+0x8e/0xa0 [ 35.240224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.240924] remove_vma+0x139/0x170 [ 35.241415] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.242018] do_vmi_munmap+0x1f1/0x2b0 [ 35.242544] __vm_munmap+0x138/0x3a0 [ 35.243079] __x64_sys_munmap+0x59/0x80 [ 35.243620] do_syscall_64+0x3f/0x90 [ 35.244130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.244831] [ 35.245088] Second to last potentially related work creation: [ 35.245818] kasan_save_stack+0x22/0x50 [ 35.246359] __kasan_record_aux_stack+0x8e/0xa0 [ 35.246996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.247700] remove_vma+0x139/0x170 [ 35.248206] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.248804] do_vmi_munmap+0x1f1/0x2b0 [ 35.249328] mmap_region+0x1f9/0x2660 [ 35.249833] do_mmap+0x854/0xf00 [ 35.250309] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.250865] ksys_mmap_pgoff+0x3af/0x500 [ 35.251423] do_syscall_64+0x3f/0x90 [ 35.251938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.252629] [ 35.252874] The buggy address belongs to the object at ffff88800ea26ae0 [ 35.252874] which belongs to the cache vm_area_struct of size 168 [ 35.254482] The buggy address is located 88 bytes inside of [ 35.254482] freed 168-byte region [ffff88800ea26ae0, ffff88800ea26b88) [ 35.256000] [ 35.256240] The buggy address belongs to the physical page: [ 35.256954] page:00000000f9a4ce09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea26 [ 35.258119] memcg:ffff88800e95b401 [ 35.258575] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.259302] page_type: 0xffffffff() [ 35.259789] raw: 0100000000000200 ffff88800879fc80 ffffea0000336cc0 dead000000000006 [ 35.260786] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e95b401 [ 35.261799] page dumped because: kasan: bad access detected [ 35.262531] [ 35.262761] Memory state around the buggy address: [ 35.263400] ffff88800ea26a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.264322] ffff88800ea26a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.265257] >ffff88800ea26b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.266180] ^ [ 35.266852] ffff88800ea26b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 35.267788] ffff88800ea26c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.268715] ================================================================== [ 35.269792] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.988983] BUG: Bad rss-counter state mm:000000003293d817 type:MM_FILEPAGES val:33 [ 36.989652] BUG: Bad rss-counter state mm:000000003293d817 type:MM_ANONPAGES val:22 [ 37.534813] BUG: Bad rss-counter state mm:000000005346e4b5 type:MM_FILEPAGES val:33 [ 37.535981] BUG: Bad rss-counter state mm:000000005346e4b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40630' (ECDSA) to the list of known hosts. 2023/06/19 14:29:44 fuzzer started 2023/06/19 14:29:44 dialing manager at localhost:44161 2023/06/19 14:29:44 checking machine... 2023/06/19 14:29:44 checking revisions... [ 38.202810] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:29:45 testing simple program... [ 38.256802] cgroup: Unknown subsys name 'net' [ 38.302471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:29:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002833f8f RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88801419fc60 R8 =0000000000000001 R9 =0000000000000000 R10=ffff8880159e0007 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce39518 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f48b95f3900 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=00007ffe626f72f8 CR3=000000001033c000 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=2034343a39323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39323a3431203931 XMM08=3d656e696c646d632022656369767265 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=00007fdf31b20000 CR3=000000000d83a000 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=c9b6271188246180f2452cf9d5d2a214 XMM02=ec2efd57dc4c00df000000000011d0d0 XMM03=2047b822f2ffa0c8000000000011d1a0 XMM04=726b10f3dec3c41d00000000000ae988 XMM05=33a8b9f33aeb91150000000000134ea0 XMM06=bdf2e299e47b49d50000000000134610 XMM07=e042d86d42eb936e0000000000123d80 XMM08=2047b822f2ffa0c8000000000011d1a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000