syzkaller login: [ 30.985579] BUG: Bad rss-counter state mm:0000000043d82b0e type:MM_FILEPAGES val:33 [ 30.986907] BUG: Bad rss-counter state mm:0000000043d82b0e type:MM_ANONPAGES val:22 [ 31.162531] ================================================================== [ 31.163516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.164522] Read of size 8 at addr ffff88800ef97df0 by task sshd/220 [ 31.165440] [ 31.165677] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.166606] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.167653] Call Trace: [ 31.167996] [ 31.168300] dump_stack_lvl+0x91/0xf0 [ 31.168827] print_report+0xcc/0x620 [ 31.169348] ? __virt_addr_valid+0x102/0x340 [ 31.169937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170608] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171272] kasan_report+0xbe/0xf0 [ 31.171798] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.172486] vma_interval_tree_remove+0xc75/0xec0 [ 31.173152] vma_prepare+0xc54/0x11a0 [ 31.173684] __split_vma+0x5af/0x950 [ 31.174228] ? __pfx___split_vma+0x10/0x10 [ 31.174820] ? find_held_lock+0x2c/0x110 [ 31.175399] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.176033] ? lock_is_held_type+0x9f/0x120 [ 31.176598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.177222] ? mtree_range_walk+0x632/0x900 [ 31.177836] ? mas_walk+0x5c7/0x7c0 [ 31.178375] do_vmi_munmap+0x1f1/0x2b0 [ 31.178928] mmap_region+0x1f9/0x2660 [ 31.179466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.180036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.180826] ? __pfx_lock_acquire+0x10/0x10 [ 31.181420] ? __pfx_mmap_region+0x10/0x10 [ 31.182007] ? security_mmap_addr+0x7d/0xa0 [ 31.182621] ? get_unmapped_area+0x1f5/0x3f0 [ 31.183241] do_mmap+0x854/0xf00 [ 31.183733] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.184281] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.184907] ksys_mmap_pgoff+0x3af/0x500 [ 31.185466] do_syscall_64+0x3f/0x90 [ 31.186006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186734] RIP: 0033:0x7fc0b25b5d82 [ 31.187251] 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 [ 31.189620] RSP: 002b:00007ffe3ac6a068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.190646] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc0b25b5d82 [ 31.191582] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc0b19ef000 [ 31.192517] RBP: 00007fc0b19ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.193459] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad15f3dec0 [ 31.194407] R13: 00007ffe3ac6a080 R14: 00007ffe3ac6a0b0 R15: 00007ffe3ac6a410 [ 31.195367] [ 31.195693] [ 31.195933] Allocated by task 213: [ 31.196420] kasan_save_stack+0x22/0x50 [ 31.196989] kasan_set_track+0x25/0x30 [ 31.197540] __kasan_slab_alloc+0x59/0x70 [ 31.198126] kmem_cache_alloc+0x16b/0x370 [ 31.198735] vm_area_dup+0x20/0x160 [ 31.199269] __split_vma+0x170/0x950 [ 31.199793] split_vma+0xc6/0x110 [ 31.200286] mprotect_fixup+0x8d2/0xb30 [ 31.200853] do_mprotect_pkey+0x87e/0xd40 [ 31.201430] __x64_sys_mprotect+0x78/0xc0 [ 31.202023] do_syscall_64+0x3f/0x90 [ 31.202560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203270] [ 31.203513] Freed by task 19: [ 31.203954] kasan_save_stack+0x22/0x50 [ 31.204512] kasan_set_track+0x25/0x30 [ 31.205062] kasan_save_free_info+0x2b/0x50 [ 31.205660] __kasan_slab_free+0x10a/0x190 [ 31.206274] kmem_cache_free+0x10d/0x4d0 [ 31.206780] rcu_core+0x8c8/0x2860 [ 31.207228] __do_softirq+0x1b7/0x7d4 [ 31.207759] [ 31.208001] Last potentially related work creation: [ 31.208656] kasan_save_stack+0x22/0x50 [ 31.209216] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210556] remove_vma+0x139/0x170 [ 31.211004] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211608] do_vmi_munmap+0x1f1/0x2b0 [ 31.212156] __vm_munmap+0x138/0x3a0 [ 31.212677] __x64_sys_munmap+0x59/0x80 [ 31.213226] do_syscall_64+0x3f/0x90 [ 31.213761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214487] [ 31.214728] The buggy address belongs to the object at ffff88800ef97d98 [ 31.214728] which belongs to the cache vm_area_struct of size 168 [ 31.216367] The buggy address is located 88 bytes inside of [ 31.216367] freed 168-byte region [ffff88800ef97d98, ffff88800ef97e40) [ 31.217840] [ 31.218083] The buggy address belongs to the physical page: [ 31.218869] page:00000000ec5b961c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef97 [ 31.220109] memcg:ffff8880168cdf01 [ 31.220556] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.221196] page_type: 0xffffffff() [ 31.221713] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.222750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168cdf01 [ 31.223776] page dumped because: kasan: bad access detected [ 31.224520] [ 31.224760] Memory state around the buggy address: [ 31.225411] ffff88800ef97c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.226397] ffff88800ef97d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.227360] >ffff88800ef97d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.228319] ^ [ 31.229122] ffff88800ef97e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.230054] ffff88800ef97e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.230986] ================================================================== [ 31.232202] Disabling lock debugging due to kernel taint [ 33.081856] BUG: Bad rss-counter state mm:000000007914fc29 type:MM_FILEPAGES val:32 [ 33.082867] BUG: Bad rss-counter state mm:000000007914fc29 type:MM_ANONPAGES val:22 [ 33.551905] BUG: Bad rss-counter state mm:00000000443c3c40 type:MM_FILEPAGES val:33 [ 33.553095] BUG: Bad rss-counter state mm:00000000443c3c40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8229' (ECDSA) to the list of known hosts. 2023/06/20 15:42:30 fuzzer started 2023/06/20 15:42:30 dialing manager at localhost:36067 2023/06/20 15:42:30 checking machine... 2023/06/20 15:42:30 checking revisions... [ 34.273211] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:42:30 testing simple program... [ 34.319947] cgroup: Unknown subsys name 'net' [ 34.363690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:42:29 Registers: info registers vcpu 0 RAX=1ffffffff0c0aa69 RBX=ffffffff86055348 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffffffff86055348 RSP=ffff88806ce099b8 R8 =ffffffff864bbb4e R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6a61 R12=ffffffff8605534c R13=ffffffff86055348 R14=ffffffff86055348 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007ff3af024900 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=00007f43d8a06650 CR3=000000000cd3e000 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=0611b8240b9165a70042572e48770a49 XMM02=eff9b2d0a8fce9cb000000000011a1d8 XMM03=2c67c8bc2e329bc3000000000011a300 XMM04=14c06caa853be53e00000000000ae988 XMM05=bc777c2bdb34489900000000001326e8 XMM06=4fda316b135da52b00000000001314d8 XMM07=fb795ef6d65770560000000000121768 XMM08=2c67c8bc2e329bc3000000000011a300 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd203893b8 CR3=000000001453a000 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=2039323a32343a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a32343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000