syzkaller login: [ 35.750027] BUG: Bad rss-counter state mm:000000007115ab18 type:MM_FILEPAGES val:33 [ 35.751036] BUG: Bad rss-counter state mm:000000007115ab18 type:MM_ANONPAGES val:22 [ 35.929047] ================================================================== [ 35.929991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.930941] Read of size 8 at addr ffff88800c4cf140 by task sshd/220 [ 35.931855] [ 35.932076] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.932938] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.933958] Call Trace: [ 35.934282] [ 35.934570] dump_stack_lvl+0x91/0xf0 [ 35.935056] print_report+0xcc/0x620 [ 35.935542] ? __virt_addr_valid+0x102/0x340 [ 35.936092] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.936713] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.937350] kasan_report+0xbe/0xf0 [ 35.938024] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.938833] vma_interval_tree_remove+0xc75/0xec0 [ 35.939595] vma_prepare+0xc54/0x11a0 [ 35.940208] __split_vma+0x5af/0x950 [ 35.940785] ? __pfx___split_vma+0x10/0x10 [ 35.941479] ? find_held_lock+0x2c/0x110 [ 35.942160] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.942859] ? lock_is_held_type+0x9f/0x120 [ 35.943540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.944307] ? mtree_range_walk+0x632/0x900 [ 35.944985] ? mas_walk+0x5c7/0x7c0 [ 35.945596] do_vmi_munmap+0x1f1/0x2b0 [ 35.946240] mmap_region+0x1f9/0x2660 [ 35.946835] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.947469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.948362] ? __pfx_lock_acquire+0x10/0x10 [ 35.949022] ? __pfx_mmap_region+0x10/0x10 [ 35.949700] ? security_mmap_addr+0x7d/0xa0 [ 35.950392] ? get_unmapped_area+0x1f5/0x3f0 [ 35.951079] do_mmap+0x854/0xf00 [ 35.951615] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.952253] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.952941] ksys_mmap_pgoff+0x3af/0x500 [ 35.953603] do_syscall_64+0x3f/0x90 [ 35.954215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.954861] RIP: 0033:0x7fccf075bd82 [ 35.955334] 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 [ 35.957506] RSP: 002b:00007ffc3ad61378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.958538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccf075bd82 [ 35.959662] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccefb95000 [ 35.960788] RBP: 00007fccefb95000 R08: 0000000000000009 R09: 0000000000001000 [ 35.961930] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560bfbc9eec0 [ 35.963047] R13: 00007ffc3ad61390 R14: 00007ffc3ad613c0 R15: 00007ffc3ad61720 [ 35.964206] [ 35.964602] [ 35.964888] Allocated by task 213: [ 35.965499] kasan_save_stack+0x22/0x50 [ 35.966174] kasan_set_track+0x25/0x30 [ 35.966837] __kasan_slab_alloc+0x59/0x70 [ 35.967544] kmem_cache_alloc+0x16b/0x370 [ 35.968225] vm_area_dup+0x20/0x160 [ 35.968836] __split_vma+0x170/0x950 [ 35.969474] split_vma+0xc6/0x110 [ 35.970058] mprotect_fixup+0x8d2/0xb30 [ 35.970733] do_mprotect_pkey+0x87e/0xd40 [ 35.971428] __x64_sys_mprotect+0x78/0xc0 [ 35.972134] do_syscall_64+0x3f/0x90 [ 35.972771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.973667] [ 35.973955] Freed by task 213: [ 35.974486] kasan_save_stack+0x22/0x50 [ 35.975164] kasan_set_track+0x25/0x30 [ 35.975816] kasan_save_free_info+0x2b/0x50 [ 35.976536] __kasan_slab_free+0x10a/0x190 [ 35.977258] kmem_cache_free+0x10d/0x4d0 [ 35.977954] rcu_core+0x8c8/0x2860 [ 35.978550] __do_softirq+0x1b7/0x7d4 [ 35.979192] [ 35.979477] Last potentially related work creation: [ 35.980277] kasan_save_stack+0x22/0x50 [ 35.980948] __kasan_record_aux_stack+0x8e/0xa0 [ 35.981748] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.982611] remove_vma+0x139/0x170 [ 35.983214] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.983966] do_vmi_munmap+0x1f1/0x2b0 [ 35.984623] __vm_munmap+0x138/0x3a0 [ 35.985246] __x64_sys_munmap+0x59/0x80 [ 35.985814] do_syscall_64+0x3f/0x90 [ 35.986305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.986976] [ 35.987198] The buggy address belongs to the object at ffff88800c4cf0e8 [ 35.987198] which belongs to the cache vm_area_struct of size 168 [ 35.988667] The buggy address is located 88 bytes inside of [ 35.988667] freed 168-byte region [ffff88800c4cf0e8, ffff88800c4cf190) [ 35.990073] [ 35.990288] The buggy address belongs to the physical page: [ 35.990947] page:0000000003826a60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4cf [ 35.992033] memcg:ffff888018278301 [ 35.992457] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.993097] page_type: 0xffffffff() [ 35.993567] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.994479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018278301 [ 35.995404] page dumped because: kasan: bad access detected [ 35.996058] [ 35.996272] Memory state around the buggy address: [ 35.996853] ffff88800c4cf000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.997717] ffff88800c4cf080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.998581] >ffff88800c4cf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.999433] ^ [ 36.000078] ffff88800c4cf180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.000933] ffff88800c4cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.001797] ================================================================== [ 36.002949] Disabling lock debugging due to kernel taint [ 37.997564] BUG: Bad rss-counter state mm:0000000027db89cc type:MM_FILEPAGES val:33 [ 37.998557] BUG: Bad rss-counter state mm:0000000027db89cc type:MM_ANONPAGES val:22 [ 38.367162] BUG: Bad rss-counter state mm:0000000062f86a08 type:MM_FILEPAGES val:33 [ 38.368293] BUG: Bad rss-counter state mm:0000000062f86a08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11714' (ECDSA) to the list of known hosts. 2023/06/19 13:31:50 fuzzer started 2023/06/19 13:31:50 dialing manager at localhost:44161 2023/06/19 13:31:50 checking machine... 2023/06/19 13:31:50 checking revisions... [ 39.082874] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:31:51 testing simple program... [ 39.124933] cgroup: Unknown subsys name 'net' [ 39.170063] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:31:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800dc33ab0 RCX=ffff88800dc33ab0 RDX=00000000000d000c RSI=ffff88800dc33ab0 RDI=ffff88800844f780 RBP=ffff88800e647a28 RSP=ffff88800e647990 R8 =00000000000d000b R9 =0000000000000000 R10=ffffea0000370cc0 R11=00000000000d0009 R12=ffffea0000370cc0 R13=ffff88800dc33130 R14=00000000000d000b R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007f5755be0900 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=00007ffd20e31000 CR3=0000000009502000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf2c240 RCX=ffffffff813fc20e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000005 RBP=00000008e57e6afb RSP=ffff88806cf09dd0 R8 =0000000000000006 R9 =00000000fffc0053 R10=00000000fffc0053 R11=ffff88806cf09ff8 R12=0000000000000001 R13=ffff88806cf2c244 R14=ffffffff8540f200 R15=ffff88806cf2c248 RIP=ffffffff814c0388 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 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=00007fb3a1a29740 CR3=0000000016b6c000 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=2030353a31333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a31333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000