syzkaller login: [ 31.022319] BUG: Bad rss-counter state mm:000000002002befd type:MM_FILEPAGES val:33 [ 31.023521] BUG: Bad rss-counter state mm:000000002002befd type:MM_ANONPAGES val:22 [ 31.185100] ================================================================== [ 31.186158] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.187308] Read of size 8 at addr ffff88801b85a798 by task sshd/221 [ 31.188210] [ 31.188432] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.189330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.190320] Call Trace: [ 31.190681] [ 31.190978] dump_stack_lvl+0x91/0xf0 [ 31.191477] print_report+0xcc/0x620 [ 31.191966] ? __virt_addr_valid+0x102/0x340 [ 31.192525] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193147] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193772] kasan_report+0xbe/0xf0 [ 31.194251] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194919] vma_interval_tree_remove+0xc75/0xec0 [ 31.195521] vma_prepare+0xc54/0x11a0 [ 31.196004] __split_vma+0x5af/0x950 [ 31.196479] ? __pfx___split_vma+0x10/0x10 [ 31.197014] ? find_held_lock+0x2c/0x110 [ 31.197536] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.198115] ? lock_is_held_type+0x9f/0x120 [ 31.198692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.199300] ? mtree_range_walk+0x632/0x900 [ 31.199860] ? mas_walk+0x5c7/0x7c0 [ 31.200343] do_vmi_munmap+0x1f1/0x2b0 [ 31.200840] mmap_region+0x1f9/0x2660 [ 31.201327] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.201837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.202550] ? __pfx_lock_acquire+0x10/0x10 [ 31.203113] ? __pfx_mmap_region+0x10/0x10 [ 31.203656] ? security_mmap_addr+0x7d/0xa0 [ 31.204184] ? get_unmapped_area+0x1f5/0x3f0 [ 31.204743] do_mmap+0x854/0xf00 [ 31.205181] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205673] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.206243] ksys_mmap_pgoff+0x3af/0x500 [ 31.206785] do_syscall_64+0x3f/0x90 [ 31.207270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207920] RIP: 0033:0x7ff2fbd57d82 [ 31.208382] 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 [ 31.210505] RSP: 002b:00007ffc280a7938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.211444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2fbd57d82 [ 31.212298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2fb191000 [ 31.213140] RBP: 00007ff2fb191000 R08: 0000000000000009 R09: 0000000000001000 [ 31.213990] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559dc5d8eec0 [ 31.214872] R13: 00007ffc280a7950 R14: 00007ffc280a7980 R15: 00007ffc280a7ce0 [ 31.215731] [ 31.216024] [ 31.216238] Allocated by task 214: [ 31.216665] kasan_save_stack+0x22/0x50 [ 31.217167] kasan_set_track+0x25/0x30 [ 31.217658] __kasan_slab_alloc+0x59/0x70 [ 31.218186] kmem_cache_alloc+0x16b/0x370 [ 31.218731] vm_area_dup+0x20/0x160 [ 31.219189] __split_vma+0x170/0x950 [ 31.219653] split_vma+0xc6/0x110 [ 31.220094] mprotect_fixup+0x8d2/0xb30 [ 31.220599] do_mprotect_pkey+0x87e/0xd40 [ 31.221118] __x64_sys_mprotect+0x78/0xc0 [ 31.221642] do_syscall_64+0x3f/0x90 [ 31.222121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222816] [ 31.223031] Freed by task 0: [ 31.223411] kasan_save_stack+0x22/0x50 [ 31.223913] kasan_set_track+0x25/0x30 [ 31.224420] kasan_save_free_info+0x2b/0x50 [ 31.224953] __kasan_slab_free+0x10a/0x190 [ 31.225490] kmem_cache_free+0x10d/0x4d0 [ 31.225996] rcu_core+0x8c8/0x2860 [ 31.226446] __do_softirq+0x1b7/0x7d4 [ 31.226961] [ 31.227176] Last potentially related work creation: [ 31.227754] kasan_save_stack+0x22/0x50 [ 31.228256] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.229470] remove_vma+0x139/0x170 [ 31.229920] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230484] do_vmi_munmap+0x1f1/0x2b0 [ 31.231014] __vm_munmap+0x138/0x3a0 [ 31.231486] __x64_sys_munmap+0x59/0x80 [ 31.231984] do_syscall_64+0x3f/0x90 [ 31.232467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233107] [ 31.233321] The buggy address belongs to the object at ffff88801b85a740 [ 31.233321] which belongs to the cache vm_area_struct of size 168 [ 31.234814] The buggy address is located 88 bytes inside of [ 31.234814] freed 168-byte region [ffff88801b85a740, ffff88801b85a7e8) [ 31.236225] [ 31.236442] The buggy address belongs to the physical page: [ 31.237102] page:00000000d80a09c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b85a [ 31.238191] memcg:ffff88800e614401 [ 31.238657] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239299] page_type: 0xffffffff() [ 31.239750] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.240671] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e614401 [ 31.241578] page dumped because: kasan: bad access detected [ 31.242250] [ 31.242467] Memory state around the buggy address: [ 31.243080] ffff88801b85a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.243950] ffff88801b85a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.244805] >ffff88801b85a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.245653] ^ [ 31.246147] ffff88801b85a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.247044] ffff88801b85a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.247902] ================================================================== [ 31.248860] Disabling lock debugging due to kernel taint [ 33.107664] BUG: Bad rss-counter state mm:00000000247675eb type:MM_FILEPAGES val:33 [ 33.108935] BUG: Bad rss-counter state mm:00000000247675eb type:MM_ANONPAGES val:22 [ 33.586930] BUG: Bad rss-counter state mm:000000009369ee0b type:MM_FILEPAGES val:33 [ 33.588087] BUG: Bad rss-counter state mm:000000009369ee0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59867' (ECDSA) to the list of known hosts. 2023/06/21 00:27:15 fuzzer started 2023/06/21 00:27:15 dialing manager at localhost:36067 2023/06/21 00:27:15 checking machine... 2023/06/21 00:27:15 checking revisions... [ 34.280163] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:27:15 testing simple program... [ 34.324801] cgroup: Unknown subsys name 'net' [ 34.372839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:27:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffff88806ce09ab8 RDX=ffff88806ce09a98 RSI=ffff888014729b40 RDI=ffff8880146ef6e0 RBP=ffff8880146ef6e0 RSP=ffff88806ce099d8 R8 =ffffffff864b2f42 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09a98 R13=ffff88806ce02000 R14=ffff8880146ef6e8 R15=ffff88806ce09a98 RIP=ffffffff8108df6a 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 00007f0188dc9900 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=00007f0188259f80 CR3=000000000c7ec000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=75dad564f83bbedd00000000000ae988 XMM05=c37bcf7eb4a2ba400000000000132bc0 XMM06=e4cb8bb95a7664b60000000000131a58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00005563a5bd9f70 RCX=0000000000000014 RDX=0000000000000039 RSI=00005563a5be8dec RDI=00005563a5bda050 RBP=00007ffe18aecf40 RSP=00007ffe18aecee0 R8 =00005563a5be8dec R9 =00007fe49a5c8be0 R10=0000000000000100 R11=0000000000000246 R12=0000000000000039 R13=00005563a5be8e24 R14=0000000000000039 R15=0000000000000000 RIP=00007fe49a47f86f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe49a016900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe18ae7000 CR3=000000001c962000 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=6562206f742072657375206568742023 XMM01=66206568742073612064657373617028 XMM02=00000000000000000000000000000000 XMM03=73657909454d4f485f544c5541464544 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=6f6d657220646c756f68732074492023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000