syzkaller login: [ 40.575868] BUG: Bad rss-counter state mm:0000000039f347ba type:MM_FILEPAGES val:33 [ 40.576831] BUG: Bad rss-counter state mm:0000000039f347ba type:MM_ANONPAGES val:22 [ 40.731043] ================================================================== [ 40.731948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.732870] Read of size 8 at addr ffff88800d4da140 by task sshd/220 [ 40.733634] [ 40.733843] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.734805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.735756] Call Trace: [ 40.736087] [ 40.736370] dump_stack_lvl+0x91/0xf0 [ 40.736865] print_report+0xcc/0x620 [ 40.737334] ? __virt_addr_valid+0x102/0x340 [ 40.737881] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.738475] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.739054] kasan_report+0xbe/0xf0 [ 40.739503] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.740114] vma_interval_tree_remove+0xc75/0xec0 [ 40.740717] vma_prepare+0xc54/0x11a0 [ 40.741182] __split_vma+0x5af/0x950 [ 40.741637] ? __pfx___split_vma+0x10/0x10 [ 40.742155] ? find_held_lock+0x2c/0x110 [ 40.742664] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.743222] ? lock_is_held_type+0x9f/0x120 [ 40.743757] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.744360] ? mtree_range_walk+0x632/0x900 [ 40.744905] ? mas_walk+0x5c7/0x7c0 [ 40.745362] do_vmi_munmap+0x1f1/0x2b0 [ 40.745851] mmap_region+0x1f9/0x2660 [ 40.746323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.746824] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.747526] ? __pfx_lock_acquire+0x10/0x10 [ 40.748048] ? __pfx_mmap_region+0x10/0x10 [ 40.748572] ? security_mmap_addr+0x7d/0xa0 [ 40.749094] ? get_unmapped_area+0x1f5/0x3f0 [ 40.749634] do_mmap+0x854/0xf00 [ 40.750062] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.750559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.751115] ksys_mmap_pgoff+0x3af/0x500 [ 40.751610] do_syscall_64+0x3f/0x90 [ 40.752098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.752721] RIP: 0033:0x7fbd7cdf2d82 [ 40.753164] 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 [ 40.755238] RSP: 002b:00007fffc79a46d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.756127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd7cdf2d82 [ 40.756948] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd7c22c000 [ 40.757741] RBP: 00007fbd7c22c000 R08: 0000000000000009 R09: 0000000000001000 [ 40.758536] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dd2ff1b20 [ 40.759331] R13: 00007fffc79a46f0 R14: 00007fffc79a4720 R15: 00007fffc79a4a80 [ 40.760182] [ 40.760466] [ 40.760675] Allocated by task 213: [ 40.761125] kasan_save_stack+0x22/0x50 [ 40.761632] kasan_set_track+0x25/0x30 [ 40.762119] __kasan_slab_alloc+0x59/0x70 [ 40.762632] kmem_cache_alloc+0x16b/0x370 [ 40.763140] vm_area_dup+0x20/0x160 [ 40.763591] __split_vma+0x170/0x950 [ 40.764060] split_vma+0xc6/0x110 [ 40.764490] mprotect_fixup+0x8d2/0xb30 [ 40.764979] do_mprotect_pkey+0x87e/0xd40 [ 40.765497] __x64_sys_mprotect+0x78/0xc0 [ 40.766016] do_syscall_64+0x3f/0x90 [ 40.766467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.767092] [ 40.767301] Freed by task 213: [ 40.767690] kasan_save_stack+0x22/0x50 [ 40.768205] kasan_set_track+0x25/0x30 [ 40.768696] kasan_save_free_info+0x2b/0x50 [ 40.769216] __kasan_slab_free+0x10a/0x190 [ 40.769741] kmem_cache_free+0x10d/0x4d0 [ 40.770233] rcu_core+0x8c8/0x2860 [ 40.770666] __do_softirq+0x1b7/0x7d4 [ 40.771134] [ 40.771339] Last potentially related work creation: [ 40.771929] kasan_save_stack+0x22/0x50 [ 40.772413] __kasan_record_aux_stack+0x8e/0xa0 [ 40.772973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.773584] remove_vma+0x139/0x170 [ 40.774034] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.774575] do_vmi_munmap+0x1f1/0x2b0 [ 40.775054] __vm_munmap+0x138/0x3a0 [ 40.775564] __x64_sys_munmap+0x59/0x80 [ 40.776082] do_syscall_64+0x3f/0x90 [ 40.776550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.777173] [ 40.777387] Second to last potentially related work creation: [ 40.778061] kasan_save_stack+0x22/0x50 [ 40.778556] __kasan_record_aux_stack+0x8e/0xa0 [ 40.779156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.779825] remove_vma+0x139/0x170 [ 40.780284] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.780850] do_vmi_munmap+0x1f1/0x2b0 [ 40.781348] mmap_region+0x1f9/0x2660 [ 40.781828] do_mmap+0x854/0xf00 [ 40.782263] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.782759] ksys_mmap_pgoff+0x3af/0x500 [ 40.783267] do_syscall_64+0x3f/0x90 [ 40.783747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.784410] [ 40.784624] The buggy address belongs to the object at ffff88800d4da0e8 [ 40.784624] which belongs to the cache vm_area_struct of size 168 [ 40.786090] The buggy address is located 88 bytes inside of [ 40.786090] freed 168-byte region [ffff88800d4da0e8, ffff88800d4da190) [ 40.787494] [ 40.787712] The buggy address belongs to the physical page: [ 40.788373] page:00000000541991e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4da [ 40.789472] memcg:ffff88800c665801 [ 40.789901] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.790545] page_type: 0xffffffff() [ 40.790999] raw: 0100000000000200 ffff88800879fc80 ffffea00003baa00 dead000000000006 [ 40.791943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c665801 [ 40.792843] page dumped because: kasan: bad access detected [ 40.793512] [ 40.793736] Memory state around the buggy address: [ 40.794313] ffff88800d4da000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.795185] ffff88800d4da080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 40.796068] >ffff88800d4da100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.796917] ^ [ 40.797551] ffff88800d4da180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 40.798404] ffff88800d4da200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.799254] ================================================================== [ 40.800183] Disabling lock debugging due to kernel taint [ 42.766948] BUG: Bad rss-counter state mm:0000000002fd3db1 type:MM_FILEPAGES val:33 [ 42.768033] BUG: Bad rss-counter state mm:0000000002fd3db1 type:MM_ANONPAGES val:22 [ 43.331178] BUG: Bad rss-counter state mm:00000000e8f7add5 type:MM_FILEPAGES val:33 [ 43.332346] BUG: Bad rss-counter state mm:00000000e8f7add5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58479' (ECDSA) to the list of known hosts. 2023/06/19 12:09:41 fuzzer started 2023/06/19 12:09:42 dialing manager at localhost:44161 2023/06/19 12:09:42 checking machine... 2023/06/19 12:09:42 checking revisions... [ 43.983373] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:09:42 testing simple program... [ 44.040394] cgroup: Unknown subsys name 'net' [ 44.078816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:09:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=ffff88806ce361a0 RDX=0000000000000000 RSI=1ffff1100d9c6c3e RDI=ffff88806ce361f0 RBP=ffff88800ca74c00 RSP=ffff88806ce09db8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000078 R13=ffffffff87b67200 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff81830606 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 0000000000000000 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=0000558ddedbdc78 CR3=0000000016b84000 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=2031343a39303a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a39303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001844f05 RBX=ffffed1001844f06 RCX=ffffffff81acd5e6 RDX=0000000000000001 RSI=0000000000000008 RDI=ffff88800c227828 RBP=ffffed1001844f05 RSP=ffff8880145b7728 R8 =0000000000000000 R9 =ffffed1001844f05 R10=ffff88800c22782f R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff888016096fa8 R15=ffff8880145b78c0 RIP=ffffffff8180ef24 RFL=00000202 [-------] 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 00007f1f8916a900 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=00007f1f885ff590 CR3=000000000ca50000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7a480da990da301d00000000000ae988 XMM05=61a2c81420c7f9e00000000000136a30 XMM06=4fda316b135da52b00000000001354b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000