syzkaller login: [ 31.060799] BUG: Bad rss-counter state mm:000000007e18de3a type:MM_FILEPAGES val:33 [ 31.062022] BUG: Bad rss-counter state mm:000000007e18de3a type:MM_ANONPAGES val:22 [ 31.099452] ================================================================== [ 31.100405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.101533] Read of size 8 at addr ffff88801479a798 by task sshd/220 [ 31.102371] [ 31.102600] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.103522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.104557] Call Trace: [ 31.104898] [ 31.105206] dump_stack_lvl+0x91/0xf0 [ 31.105730] print_report+0xcc/0x620 [ 31.106273] ? __virt_addr_valid+0x102/0x340 [ 31.106880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.107532] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108143] kasan_report+0xbe/0xf0 [ 31.108624] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109256] vma_interval_tree_remove+0xc75/0xec0 [ 31.109870] vma_prepare+0xc54/0x11a0 [ 31.110353] __split_vma+0x5af/0x950 [ 31.110832] ? __pfx___split_vma+0x10/0x10 [ 31.111378] ? find_held_lock+0x2c/0x110 [ 31.111962] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.112596] ? lock_is_held_type+0x9f/0x120 [ 31.113200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.113911] ? mtree_range_walk+0x632/0x900 [ 31.114534] ? mas_walk+0x5c7/0x7c0 [ 31.115065] do_vmi_munmap+0x1f1/0x2b0 [ 31.115619] mmap_region+0x1f9/0x2660 [ 31.116162] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.116747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.117558] ? __pfx_lock_acquire+0x10/0x10 [ 31.118174] ? __pfx_mmap_region+0x10/0x10 [ 31.118778] ? security_mmap_addr+0x7d/0xa0 [ 31.119372] ? get_unmapped_area+0x1f5/0x3f0 [ 31.119992] do_mmap+0x854/0xf00 [ 31.120500] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.121043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.121664] ksys_mmap_pgoff+0x3af/0x500 [ 31.122238] do_syscall_64+0x3f/0x90 [ 31.122752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123433] RIP: 0033:0x7ff5c77dad82 [ 31.123935] 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 [ 31.126234] RSP: 002b:00007fffd3fd7398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.127203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5c77dad82 [ 31.128112] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5c6c14000 [ 31.129056] RBP: 00007ff5c6c14000 R08: 0000000000000009 R09: 0000000000001000 [ 31.129975] R10: 0000000000000812 R11: 0000000000000206 R12: 000056429425eec0 [ 31.130882] R13: 00007fffd3fd73b0 R14: 00007fffd3fd73e0 R15: 00007fffd3fd7740 [ 31.131826] [ 31.132138] [ 31.132360] Allocated by task 213: [ 31.132797] kasan_save_stack+0x22/0x50 [ 31.133300] kasan_set_track+0x25/0x30 [ 31.133882] __kasan_slab_alloc+0x59/0x70 [ 31.134526] kmem_cache_alloc+0x16b/0x370 [ 31.135232] vm_area_dup+0x20/0x160 [ 31.135816] __split_vma+0x170/0x950 [ 31.136372] split_vma+0xc6/0x110 [ 31.136924] mprotect_fixup+0x8d2/0xb30 [ 31.137532] do_mprotect_pkey+0x87e/0xd40 [ 31.138220] __x64_sys_mprotect+0x78/0xc0 [ 31.138840] do_syscall_64+0x3f/0x90 [ 31.139323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.139986] [ 31.140207] Freed by task 19: [ 31.140612] kasan_save_stack+0x22/0x50 [ 31.141128] kasan_set_track+0x25/0x30 [ 31.141646] kasan_save_free_info+0x2b/0x50 [ 31.142203] __kasan_slab_free+0x10a/0x190 [ 31.142749] kmem_cache_free+0x10d/0x4d0 [ 31.143261] rcu_core+0x8c8/0x2860 [ 31.143745] __do_softirq+0x1b7/0x7d4 [ 31.144230] [ 31.144452] Last potentially related work creation: [ 31.145061] kasan_save_stack+0x22/0x50 [ 31.145575] __kasan_record_aux_stack+0x8e/0xa0 [ 31.146162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.146853] remove_vma+0x139/0x170 [ 31.147315] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.147894] do_vmi_munmap+0x1f1/0x2b0 [ 31.148393] __vm_munmap+0x138/0x3a0 [ 31.148893] __x64_sys_munmap+0x59/0x80 [ 31.149366] do_syscall_64+0x3f/0x90 [ 31.149837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.150482] [ 31.150703] The buggy address belongs to the object at ffff88801479a740 [ 31.150703] which belongs to the cache vm_area_struct of size 168 [ 31.152104] The buggy address is located 88 bytes inside of [ 31.152104] freed 168-byte region [ffff88801479a740, ffff88801479a7e8) [ 31.153444] [ 31.153690] The buggy address belongs to the physical page: [ 31.154330] page:000000006d653073 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1479a [ 31.155477] memcg:ffff88800e83a101 [ 31.155935] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.156627] page_type: 0xffffffff() [ 31.157104] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.158075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e83a101 [ 31.159101] page dumped because: kasan: bad access detected [ 31.159827] [ 31.160063] Memory state around the buggy address: [ 31.160707] ffff88801479a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.161650] ffff88801479a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.162582] >ffff88801479a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.163436] ^ [ 31.163983] ffff88801479a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.164877] ffff88801479a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.165763] ================================================================== [ 31.166939] Disabling lock debugging due to kernel taint [ 33.062339] BUG: Bad rss-counter state mm:00000000a75e83ba type:MM_FILEPAGES val:33 [ 33.063331] BUG: Bad rss-counter state mm:00000000a75e83ba type:MM_ANONPAGES val:22 [ 33.519809] BUG: Bad rss-counter state mm:00000000a7cac613 type:MM_FILEPAGES val:33 [ 33.520864] BUG: Bad rss-counter state mm:00000000a7cac613 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63719' (ECDSA) to the list of known hosts. 2023/06/20 13:16:22 fuzzer started 2023/06/20 13:16:22 dialing manager at localhost:36067 2023/06/20 13:16:22 checking machine... 2023/06/20 13:16:22 checking revisions... [ 34.255230] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:16:23 testing simple program... [ 34.306055] cgroup: Unknown subsys name 'net' [ 34.343450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:16:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000039500 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88806ce39518 RBP=ffff88806ce09dc8 RSP=ffff88806ce09d88 R8 =0000000000000001 R9 =ffffed100d9c13a3 R10=0000000000000003 R11=00000016ea1ecaac R12=ffff88806ce39500 R13=ffff88806ce39518 R14=0000000000000000 R15=ffff888010133680 RIP=ffffffff8124f669 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 00007f5a7a5ca900 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=00007f5a7ab81618 CR3=000000000e978000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09e10 RDI=ffffffff81809add RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff888009616080 RIP=ffffffff811303b2 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 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=00007f4e2ffd0450 CR3=000000000f3b6000 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=00000000000000000000000000000000 XMM01=def7927cbc90488ddb4c9b5733ae810a XMM02=000000000011bce8eff9b2d0a8fce9cb XMM03=000000000011bdb82c67c8bc2e329bc3 XMM04=b5c8f36e942b5a9100000000000ae988 XMM05=2ee775b504d1164800000000001326e8 XMM06=4fda316b135da52b0000000000132370 XMM07=e042d86d42eb936e00000000001228a0 XMM08=2bee7fa6e22a30fe000000000011bdb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000