syzkaller login: [ 38.959477] BUG: Bad rss-counter state mm:00000000fe125712 type:MM_FILEPAGES val:33 [ 38.960886] BUG: Bad rss-counter state mm:00000000fe125712 type:MM_ANONPAGES val:22 [ 39.120585] ================================================================== [ 39.121661] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.122751] Read of size 8 at addr ffff88800f1575c8 by task sshd/227 [ 39.123724] [ 39.123958] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.124872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.125910] Call Trace: [ 39.126245] [ 39.126548] dump_stack_lvl+0x91/0xf0 [ 39.127061] print_report+0xcc/0x620 [ 39.127570] ? __virt_addr_valid+0x102/0x340 [ 39.128147] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.128822] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.129470] kasan_report+0xbe/0xf0 [ 39.129975] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.130636] vma_interval_tree_remove+0xc75/0xec0 [ 39.131275] vma_prepare+0xc54/0x11a0 [ 39.131793] __split_vma+0x5af/0x950 [ 39.132323] ? __pfx___split_vma+0x10/0x10 [ 39.132886] ? find_held_lock+0x2c/0x110 [ 39.133447] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.134052] ? lock_is_held_type+0x9f/0x120 [ 39.134632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.135288] ? mtree_range_walk+0x632/0x900 [ 39.135885] ? mas_walk+0x5c7/0x7c0 [ 39.136404] do_vmi_munmap+0x1f1/0x2b0 [ 39.136932] mmap_region+0x1f9/0x2660 [ 39.137451] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.137988] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.138759] ? __pfx_lock_acquire+0x10/0x10 [ 39.139330] ? __pfx_mmap_region+0x10/0x10 [ 39.139897] ? security_mmap_addr+0x7d/0xa0 [ 39.140501] ? get_unmapped_area+0x1f5/0x3f0 [ 39.141102] do_mmap+0x854/0xf00 [ 39.141560] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.142085] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.142684] ksys_mmap_pgoff+0x3af/0x500 [ 39.143221] do_syscall_64+0x3f/0x90 [ 39.143735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.144443] RIP: 0033:0x7f5616537d82 [ 39.144925] 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 [ 39.147219] RSP: 002b:00007ffd41810128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.148187] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5616537d82 [ 39.149078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5615971000 [ 39.149977] RBP: 00007f5615971000 R08: 0000000000000009 R09: 0000000000001000 [ 39.150966] R10: 0000000000000812 R11: 0000000000000206 R12: 000056512ced2ec0 [ 39.151882] R13: 00007ffd41810140 R14: 00007ffd41810170 R15: 00007ffd418104d0 [ 39.152822] [ 39.153139] [ 39.153373] Allocated by task 220: [ 39.153831] kasan_save_stack+0x22/0x50 [ 39.154369] kasan_set_track+0x25/0x30 [ 39.154902] __kasan_slab_alloc+0x59/0x70 [ 39.155469] kmem_cache_alloc+0x16b/0x370 [ 39.156025] vm_area_dup+0x20/0x160 [ 39.156520] __split_vma+0x170/0x950 [ 39.157020] split_vma+0xc6/0x110 [ 39.157491] mprotect_fixup+0x8d2/0xb30 [ 39.158029] do_mprotect_pkey+0x87e/0xd40 [ 39.158589] __x64_sys_mprotect+0x78/0xc0 [ 39.159154] do_syscall_64+0x3f/0x90 [ 39.159665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.160364] [ 39.160598] Freed by task 220: [ 39.161023] kasan_save_stack+0x22/0x50 [ 39.161563] kasan_set_track+0x25/0x30 [ 39.162092] kasan_save_free_info+0x2b/0x50 [ 39.162664] __kasan_slab_free+0x10a/0x190 [ 39.163235] kmem_cache_free+0x10d/0x4d0 [ 39.163793] rcu_core+0x8c8/0x2860 [ 39.164285] __do_softirq+0x1b7/0x7d4 [ 39.164798] [ 39.165028] Last potentially related work creation: [ 39.165660] kasan_save_stack+0x22/0x50 [ 39.166196] __kasan_record_aux_stack+0x8e/0xa0 [ 39.166814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.167509] remove_vma+0x139/0x170 [ 39.167997] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.168604] do_vmi_munmap+0x1f1/0x2b0 [ 39.169137] __vm_munmap+0x138/0x3a0 [ 39.169650] __x64_sys_munmap+0x59/0x80 [ 39.170186] do_syscall_64+0x3f/0x90 [ 39.170694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.171381] [ 39.171611] The buggy address belongs to the object at ffff88800f157570 [ 39.171611] which belongs to the cache vm_area_struct of size 168 [ 39.173206] The buggy address is located 88 bytes inside of [ 39.173206] freed 168-byte region [ffff88800f157570, ffff88800f157618) [ 39.174722] [ 39.174957] The buggy address belongs to the physical page: [ 39.175668] page:00000000753d8a4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf157 [ 39.176833] memcg:ffff88800f711201 [ 39.177298] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.177989] page_type: 0xffffffff() [ 39.178481] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.179461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f711201 [ 39.180450] page dumped because: kasan: bad access detected [ 39.181155] [ 39.181391] Memory state around the buggy address: [ 39.182011] ffff88800f157480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.182924] ffff88800f157500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.183865] >ffff88800f157580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.184782] ^ [ 39.185492] ffff88800f157600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.186407] ffff88800f157680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.187320] ================================================================== [ 39.188469] Disabling lock debugging due to kernel taint [ 41.605121] BUG: Bad rss-counter state mm:000000003cdb3a65 type:MM_FILEPAGES val:33 [ 41.606382] BUG: Bad rss-counter state mm:000000003cdb3a65 type:MM_ANONPAGES val:22 [ 42.107161] BUG: Bad rss-counter state mm:00000000dd8fdae1 type:MM_FILEPAGES val:33 [ 42.108534] BUG: Bad rss-counter state mm:00000000dd8fdae1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28764' (ECDSA) to the list of known hosts. 2023/06/21 03:45:05 fuzzer started 2023/06/21 03:45:05 dialing manager at localhost:36067 2023/06/21 03:45:05 checking machine... 2023/06/21 03:45:05 checking revisions... [ 42.910865] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:45:05 testing simple program... [ 42.964442] cgroup: Unknown subsys name 'net' [ 43.002613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8107f626 RDX=1ffff11001ebb000 RSI=0000000000000008 RDI=ffff88800eff9b40 RBP=ffff88800eff9b40 RSP=ffff888018cdfd60 R8 =0000000000000001 R9 =ffffed1001dff368 R10=ffff88800eff9b47 R11=0000000000000000 R12=ffff88800f5d8000 R13=0000000000000000 R14=ffff88800f5d95c0 R15=ffff88800f5d95e6 RIP=ffffffff8107f67c 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 00007eff00e42900 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=00005633ac9cb768 CR3=000000000e2fa000 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=2034303a35343a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a35343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000283 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff856d84a0 RSP=ffff888008e37cb8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000283 R13=ffff88801c8d2d58 R14=ffffffff813782f8 R15=ffff88800e955400 RIP=ffffffff812d8a60 RFL=00000082 [--S----] 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=00007fd88185cbb0 CR3=0000000009ed0000 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=3e951491fcc45e960e487bb51aeb8afe XMM02=000000000011af98eff9b2d0a8fce9cb XMM03=000000000011b0682c67c8bc2e329bc3 XMM04=7895992b837a235900000000000ae988 XMM05=3da1e81052b5dfa00000000000132940 XMM06=e8008b1642ea3e6000000000001313c0 XMM07=fb795ef6d657705600000000001219c8 XMM08=2c67c8bc2e329bc3000000000011b008 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000