syzkaller login: [ 31.009517] BUG: Bad rss-counter state mm:000000003f1fcbe4 type:MM_FILEPAGES val:33 [ 31.010525] BUG: Bad rss-counter state mm:000000003f1fcbe4 type:MM_ANONPAGES val:22 [ 31.154772] ================================================================== [ 31.155857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.156978] Read of size 8 at addr ffff888019d4c140 by task sshd/222 [ 31.157835] [ 31.158064] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.158933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.159924] Call Trace: [ 31.160255] [ 31.160542] dump_stack_lvl+0x91/0xf0 [ 31.161058] print_report+0xcc/0x620 [ 31.161557] ? __virt_addr_valid+0x102/0x340 [ 31.162115] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162735] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.163360] kasan_report+0xbe/0xf0 [ 31.163835] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.164470] vma_interval_tree_remove+0xc75/0xec0 [ 31.165077] vma_prepare+0xc54/0x11a0 [ 31.165556] __split_vma+0x5af/0x950 [ 31.166036] ? __pfx___split_vma+0x10/0x10 [ 31.166565] ? find_held_lock+0x2c/0x110 [ 31.167086] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.167656] ? lock_is_held_type+0x9f/0x120 [ 31.168216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.168826] ? mtree_range_walk+0x632/0x900 [ 31.169385] ? mas_walk+0x5c7/0x7c0 [ 31.169868] do_vmi_munmap+0x1f1/0x2b0 [ 31.170362] mmap_region+0x1f9/0x2660 [ 31.170843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.171351] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.172055] ? __pfx_lock_acquire+0x10/0x10 [ 31.172592] ? __pfx_mmap_region+0x10/0x10 [ 31.173129] ? security_mmap_addr+0x7d/0xa0 [ 31.173661] ? get_unmapped_area+0x1f5/0x3f0 [ 31.174215] do_mmap+0x854/0xf00 [ 31.174651] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.175151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.175711] ksys_mmap_pgoff+0x3af/0x500 [ 31.176233] do_syscall_64+0x3f/0x90 [ 31.176712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.177355] RIP: 0033:0x7f33affa1d82 [ 31.177811] 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 [ 31.179929] RSP: 002b:00007fff36407818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.180833] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33affa1d82 [ 31.181675] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33af3db000 [ 31.182520] RBP: 00007f33af3db000 R08: 0000000000000009 R09: 0000000000001000 [ 31.183365] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d536b4ec0 [ 31.184227] R13: 00007fff36407830 R14: 00007fff36407860 R15: 00007fff36407bc0 [ 31.185074] [ 31.185367] [ 31.185583] Allocated by task 215: [ 31.186008] kasan_save_stack+0x22/0x50 [ 31.186511] kasan_set_track+0x25/0x30 [ 31.187006] __kasan_slab_alloc+0x59/0x70 [ 31.187523] kmem_cache_alloc+0x16b/0x370 [ 31.188036] vm_area_dup+0x20/0x160 [ 31.188512] __split_vma+0x170/0x950 [ 31.188979] split_vma+0xc6/0x110 [ 31.189418] mprotect_fixup+0x8d2/0xb30 [ 31.189918] do_mprotect_pkey+0x87e/0xd40 [ 31.190450] __x64_sys_mprotect+0x78/0xc0 [ 31.190968] do_syscall_64+0x3f/0x90 [ 31.191441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192087] [ 31.192317] Freed by task 215: [ 31.192710] kasan_save_stack+0x22/0x50 [ 31.193219] kasan_set_track+0x25/0x30 [ 31.193711] kasan_save_free_info+0x2b/0x50 [ 31.194240] __kasan_slab_free+0x10a/0x190 [ 31.194774] kmem_cache_free+0x10d/0x4d0 [ 31.195277] rcu_core+0x8c8/0x2860 [ 31.195721] __do_softirq+0x1b7/0x7d4 [ 31.196210] [ 31.196425] Last potentially related work creation: [ 31.197002] kasan_save_stack+0x22/0x50 [ 31.197506] __kasan_record_aux_stack+0x8e/0xa0 [ 31.198079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.198711] remove_vma+0x139/0x170 [ 31.199161] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.199714] do_vmi_munmap+0x1f1/0x2b0 [ 31.200217] __vm_munmap+0x138/0x3a0 [ 31.200683] __x64_sys_munmap+0x59/0x80 [ 31.201175] do_syscall_64+0x3f/0x90 [ 31.201647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202284] [ 31.202501] The buggy address belongs to the object at ffff888019d4c0e8 [ 31.202501] which belongs to the cache vm_area_struct of size 168 [ 31.203950] The buggy address is located 88 bytes inside of [ 31.203950] freed 168-byte region [ffff888019d4c0e8, ffff888019d4c190) [ 31.205369] [ 31.205584] The buggy address belongs to the physical page: [ 31.206239] page:00000000ec75fdaa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d4c [ 31.207322] memcg:ffff888016781301 [ 31.207752] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.208423] page_type: 0xffffffff() [ 31.208875] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.209801] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016781301 [ 31.210705] page dumped because: kasan: bad access detected [ 31.211369] [ 31.211585] Memory state around the buggy address: [ 31.212186] ffff888019d4c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.213044] ffff888019d4c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.213929] >ffff888019d4c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.214820] ^ [ 31.215457] ffff888019d4c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.216322] ffff888019d4c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.217175] ================================================================== [ 31.218222] Disabling lock debugging due to kernel taint [ 33.072462] BUG: Bad rss-counter state mm:00000000b8fc7604 type:MM_FILEPAGES val:33 [ 33.073447] BUG: Bad rss-counter state mm:00000000b8fc7604 type:MM_ANONPAGES val:22 [ 33.507503] BUG: Bad rss-counter state mm:00000000f844c53d type:MM_FILEPAGES val:33 [ 33.508430] BUG: Bad rss-counter state mm:00000000f844c53d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47076' (ECDSA) to the list of known hosts. 2023/06/20 15:06:49 fuzzer started 2023/06/20 15:06:49 dialing manager at localhost:36067 2023/06/20 15:06:49 checking machine... 2023/06/20 15:06:49 checking revisions... [ 34.250698] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:06:49 testing simple program... [ 34.306494] cgroup: Unknown subsys name 'net' [ 34.343007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:06:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000003bd RCX=0000000000000000 RDX=1ffff1100d9c73ee RSI=0000000000039501 RDI=ffff88806ce39f70 RBP=ffff88806ce39500 RSP=ffff88800ef3f458 R8 =dffffc0000000000 R9 =0000000000000002 R10=ffff888008dcc080 R11=ffff888008c04000 R12=0000000000000002 R13=ffff88800ef3f578 R14=0000000000000001 R15=000000000001aade RIP=ffffffff8126b148 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 00007fb6d6184700 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=00007ff73bdae550 CR3=000000000c546000 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=2039343a36303a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6b RBX=0000000000000001 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888015ae7890 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=0000000000000001 R15=0000000000000014 RIP=ffffffff8180f12f 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 00007f25ea4f9900 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=00007f25eaab0618 CR3=000000000e004000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000