syzkaller login: [ 29.999835] BUG: Bad rss-counter state mm:00000000321a2bed type:MM_FILEPAGES val:33 [ 30.001127] BUG: Bad rss-counter state mm:00000000321a2bed type:MM_ANONPAGES val:22 [ 30.187116] ================================================================== [ 30.188071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.189040] Read of size 8 at addr ffff8880185a2228 by task sshd/221 [ 30.189961] [ 30.190185] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.191079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.192090] Call Trace: [ 30.192422] [ 30.192721] dump_stack_lvl+0x91/0xf0 [ 30.193226] print_report+0xcc/0x620 [ 30.193731] ? __virt_addr_valid+0x102/0x340 [ 30.194315] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.194953] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.195587] kasan_report+0xbe/0xf0 [ 30.196077] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.196720] vma_interval_tree_remove+0xc75/0xec0 [ 30.197332] vma_prepare+0xc54/0x11a0 [ 30.197846] __split_vma+0x5af/0x950 [ 30.198337] ? __pfx___split_vma+0x10/0x10 [ 30.198901] ? find_held_lock+0x2c/0x110 [ 30.199445] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.200041] ? lock_is_held_type+0x9f/0x120 [ 30.200599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.201235] ? mtree_range_walk+0x632/0x900 [ 30.201813] ? mas_walk+0x5c7/0x7c0 [ 30.202307] do_vmi_munmap+0x1f1/0x2b0 [ 30.202821] mmap_region+0x1f9/0x2660 [ 30.203321] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.203857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.204592] ? __pfx_lock_acquire+0x10/0x10 [ 30.205136] ? __pfx_mmap_region+0x10/0x10 [ 30.205687] ? security_mmap_addr+0x7d/0xa0 [ 30.206255] ? get_unmapped_area+0x1f5/0x3f0 [ 30.206836] do_mmap+0x854/0xf00 [ 30.207289] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.207808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.208389] ksys_mmap_pgoff+0x3af/0x500 [ 30.208920] do_syscall_64+0x3f/0x90 [ 30.209419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.210126] RIP: 0033:0x7f2e91110d82 [ 30.210609] 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 [ 30.212827] RSP: 002b:00007fff0728e138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.213749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e91110d82 [ 30.214646] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e9054a000 [ 30.215531] RBP: 00007f2e9054a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.216399] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2e8740ec0 [ 30.217279] R13: 00007fff0728e150 R14: 00007fff0728e180 R15: 00007fff0728e4e0 [ 30.218186] [ 30.218492] [ 30.218719] Allocated by task 212: [ 30.219166] kasan_save_stack+0x22/0x50 [ 30.219684] kasan_set_track+0x25/0x30 [ 30.220194] __kasan_slab_alloc+0x59/0x70 [ 30.220742] kmem_cache_alloc+0x16b/0x370 [ 30.221274] vm_area_dup+0x20/0x160 [ 30.221744] __split_vma+0x170/0x950 [ 30.222251] split_vma+0xc6/0x110 [ 30.222705] mprotect_fixup+0x8d2/0xb30 [ 30.223226] do_mprotect_pkey+0x87e/0xd40 [ 30.223767] __x64_sys_mprotect+0x78/0xc0 [ 30.224307] do_syscall_64+0x3f/0x90 [ 30.224804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.225465] [ 30.225691] Freed by task 19: [ 30.226095] kasan_save_stack+0x22/0x50 [ 30.226613] kasan_set_track+0x25/0x30 [ 30.227122] kasan_save_free_info+0x2b/0x50 [ 30.227679] __kasan_slab_free+0x10a/0x190 [ 30.228232] kmem_cache_free+0x10d/0x4d0 [ 30.228763] rcu_core+0x8c8/0x2860 [ 30.229219] __do_softirq+0x1b7/0x7d4 [ 30.229714] [ 30.229952] Last potentially related work creation: [ 30.230560] kasan_save_stack+0x22/0x50 [ 30.231082] __kasan_record_aux_stack+0x8e/0xa0 [ 30.231681] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.232348] remove_vma+0x139/0x170 [ 30.232810] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.233387] do_vmi_munmap+0x1f1/0x2b0 [ 30.233916] __vm_munmap+0x138/0x3a0 [ 30.234417] __x64_sys_munmap+0x59/0x80 [ 30.234953] do_syscall_64+0x3f/0x90 [ 30.235461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.236158] [ 30.236385] The buggy address belongs to the object at ffff8880185a21d0 [ 30.236385] which belongs to the cache vm_area_struct of size 168 [ 30.237987] The buggy address is located 88 bytes inside of [ 30.237987] freed 168-byte region [ffff8880185a21d0, ffff8880185a2278) [ 30.239505] [ 30.239737] The buggy address belongs to the physical page: [ 30.240456] page:000000001b5fb5c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880185a2cb0 pfn:0x185a2 [ 30.241806] memcg:ffff8880186d5b01 [ 30.242265] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.242958] page_type: 0xffffffff() [ 30.243443] raw: 0100000000000200 ffff8880087a0c80 ffffea000061d6c0 dead000000000004 [ 30.244435] raw: ffff8880185a2cb0 000000008011000e 00000001ffffffff ffff8880186d5b01 [ 30.245417] page dumped because: kasan: bad access detected [ 30.246143] [ 30.246372] Memory state around the buggy address: [ 30.247003] ffff8880185a2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.247928] ffff8880185a2180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.248859] >ffff8880185a2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.249798] ^ [ 30.250397] ffff8880185a2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.251325] ffff8880185a2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.252249] ================================================================== [ 30.253416] Disabling lock debugging due to kernel taint [ 32.188315] BUG: Bad rss-counter state mm:000000007f278dc2 type:MM_FILEPAGES val:33 [ 32.189577] BUG: Bad rss-counter state mm:000000007f278dc2 type:MM_ANONPAGES val:22 [ 32.643623] BUG: Bad rss-counter state mm:000000000b4ff3d9 type:MM_FILEPAGES val:33 [ 32.644779] BUG: Bad rss-counter state mm:000000000b4ff3d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2530' (ECDSA) to the list of known hosts. 2023/06/20 17:41:26 fuzzer started 2023/06/20 17:41:27 dialing manager at localhost:36067 2023/06/20 17:41:27 checking machine... 2023/06/20 17:41:27 checking revisions... [ 33.257869] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:41:27 testing simple program... [ 33.308973] cgroup: Unknown subsys name 'net' [ 33.353339] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:41:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff866212df R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888015d8a2e0 RIP=ffffffff8135bdae 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 =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=00007f980c99bfe0 CR3=0000000019d2e000 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=2036323a31343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff8166ef50 RDX=1ffff11002cf6f7f RSI=0000000000000008 RDI=ffff8880167b7bf8 RBP=ffff8880167b7ba8 RSP=ffff88801617fc50 R8 =0000000000000001 R9 =ffffed1002cf6fac R10=ffff8880167b7d67 R11=00000000000b6a61 R12=ffff8880167b7a58 R13=ffff8880167b79a8 R14=ffffffff84d2ed20 R15=ffff8880167b7a58 RIP=ffffffff8166ef78 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 00007faaa8a6a900 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=00007ffcb6668000 CR3=000000000e5c8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000