syzkaller login: [ 55.977327] BUG: Bad rss-counter state mm:00000000cfee77e7 type:MM_FILEPAGES val:33 [ 55.978690] BUG: Bad rss-counter state mm:00000000cfee77e7 type:MM_ANONPAGES val:22 [ 56.125731] ================================================================== [ 56.126627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.127540] Read of size 8 at addr ffff88800de234e0 by task sshd/220 [ 56.128281] [ 56.128497] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.129335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.130442] Call Trace: [ 56.130751] [ 56.131025] dump_stack_lvl+0x91/0xf0 [ 56.131505] print_report+0xcc/0x620 [ 56.131989] ? __virt_addr_valid+0x102/0x340 [ 56.132528] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.133135] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.133741] kasan_report+0xbe/0xf0 [ 56.134220] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.134824] vma_interval_tree_remove+0xc75/0xec0 [ 56.135407] vma_prepare+0xc54/0x11a0 [ 56.135879] __split_vma+0x5af/0x950 [ 56.136338] ? __pfx___split_vma+0x10/0x10 [ 56.136853] ? find_held_lock+0x2c/0x110 [ 56.137357] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.137912] ? lock_is_held_type+0x9f/0x120 [ 56.138432] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.139020] ? mtree_range_walk+0x632/0x900 [ 56.139552] ? mas_walk+0x5c7/0x7c0 [ 56.140011] do_vmi_munmap+0x1f1/0x2b0 [ 56.140492] mmap_region+0x1f9/0x2660 [ 56.140959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.141454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.142156] ? __pfx_lock_acquire+0x10/0x10 [ 56.142675] ? __pfx_mmap_region+0x10/0x10 [ 56.143185] ? security_mmap_addr+0x7d/0xa0 [ 56.143829] ? get_unmapped_area+0x1f5/0x3f0 [ 56.144379] do_mmap+0x854/0xf00 [ 56.144818] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.145309] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.145891] ksys_mmap_pgoff+0x3af/0x500 [ 56.146393] do_syscall_64+0x3f/0x90 [ 56.146863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.147521] RIP: 0033:0x7f9ef713bd82 [ 56.147976] 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 [ 56.150098] RSP: 002b:00007fff6ac0b298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.151001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ef713bd82 [ 56.151832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ef6575000 [ 56.152683] RBP: 00007f9ef6575000 R08: 0000000000000009 R09: 0000000000001000 [ 56.153529] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcb236bec0 [ 56.154385] R13: 00007fff6ac0b2b0 R14: 00007fff6ac0b2e0 R15: 00007fff6ac0b640 [ 56.155240] [ 56.155527] [ 56.155739] Allocated by task 213: [ 56.156164] kasan_save_stack+0x22/0x50 [ 56.156667] kasan_set_track+0x25/0x30 [ 56.157153] __kasan_slab_alloc+0x59/0x70 [ 56.157674] kmem_cache_alloc+0x16b/0x370 [ 56.158188] vm_area_dup+0x20/0x160 [ 56.158639] __split_vma+0x170/0x950 [ 56.159106] split_vma+0xc6/0x110 [ 56.159537] mprotect_fixup+0x8d2/0xb30 [ 56.160032] do_mprotect_pkey+0x87e/0xd40 [ 56.160553] __x64_sys_mprotect+0x78/0xc0 [ 56.161067] do_syscall_64+0x3f/0x90 [ 56.161532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.162187] [ 56.162399] Freed by task 213: [ 56.162787] kasan_save_stack+0x22/0x50 [ 56.163283] kasan_set_track+0x25/0x30 [ 56.163769] kasan_save_free_info+0x2b/0x50 [ 56.164296] __kasan_slab_free+0x10a/0x190 [ 56.164831] kmem_cache_free+0x10d/0x4d0 [ 56.165329] rcu_core+0x8c8/0x2860 [ 56.165771] __do_softirq+0x1b7/0x7d4 [ 56.166266] [ 56.166480] Last potentially related work creation: [ 56.167059] kasan_save_stack+0x22/0x50 [ 56.167558] __kasan_record_aux_stack+0x8e/0xa0 [ 56.168124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.168762] remove_vma+0x139/0x170 [ 56.169207] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.169761] do_vmi_munmap+0x1f1/0x2b0 [ 56.170255] __vm_munmap+0x138/0x3a0 [ 56.170779] __x64_sys_munmap+0x59/0x80 [ 56.171271] do_syscall_64+0x3f/0x90 [ 56.171744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.172378] [ 56.172592] Second to last potentially related work creation: [ 56.173266] kasan_save_stack+0x22/0x50 [ 56.173771] __kasan_record_aux_stack+0x8e/0xa0 [ 56.174356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.174998] remove_vma+0x139/0x170 [ 56.175444] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.176002] do_vmi_munmap+0x1f1/0x2b0 [ 56.176485] mmap_region+0x1f9/0x2660 [ 56.176963] do_mmap+0x854/0xf00 [ 56.177394] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.177883] ksys_mmap_pgoff+0x3af/0x500 [ 56.178383] do_syscall_64+0x3f/0x90 [ 56.178850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.179497] [ 56.179709] The buggy address belongs to the object at ffff88800de23488 [ 56.179709] which belongs to the cache vm_area_struct of size 168 [ 56.181170] The buggy address is located 88 bytes inside of [ 56.181170] freed 168-byte region [ffff88800de23488, ffff88800de23530) [ 56.182566] [ 56.182779] The buggy address belongs to the physical page: [ 56.183439] page:0000000039bf01d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde23 [ 56.184527] memcg:ffff88800f688601 [ 56.184949] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.185586] page_type: 0xffffffff() [ 56.186053] raw: 0100000000000200 ffff88800879fc80 ffffea0000360600 dead000000000002 [ 56.186962] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f688601 [ 56.187871] page dumped because: kasan: bad access detected [ 56.188535] [ 56.188751] Memory state around the buggy address: [ 56.189324] ffff88800de23380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 56.190187] ffff88800de23400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 56.191026] >ffff88800de23480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.191863] ^ [ 56.192606] ffff88800de23500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 56.193444] ffff88800de23580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.194300] ================================================================== [ 56.195300] Disabling lock debugging due to kernel taint [ 58.100571] BUG: Bad rss-counter state mm:00000000cd2dee56 type:MM_FILEPAGES val:33 [ 58.101732] BUG: Bad rss-counter state mm:00000000cd2dee56 type:MM_ANONPAGES val:22 [ 58.484831] BUG: Bad rss-counter state mm:000000009060f881 type:MM_FILEPAGES val:33 [ 58.485586] BUG: Bad rss-counter state mm:000000009060f881 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10730' (ECDSA) to the list of known hosts. 2023/06/20 10:14:16 fuzzer started 2023/06/20 10:14:16 dialing manager at localhost:44161 2023/06/20 10:14:16 checking machine... 2023/06/20 10:14:16 checking revisions... [ 59.163438] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:14:16 testing simple program... [ 59.204362] cgroup: Unknown subsys name 'net' [ 59.300963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:13:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801a856d58 RCX=0000000000000001 RDX=1ffff1100350adad RSI=ffff88801a857e18 RDI=ffff88801a856d68 RBP=ffff88801a857e18 RSP=ffff88801a856cb0 R8 =ffffffff86127dda R9 =ffff88801a856d98 R10=0000000000038001 R11=000000000001e456 R12=0000000000000008 R13=ffff88801a850000 R14=ffff88801a857e20 R15=ffff88801a856d58 RIP=ffffffff81130468 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 00007f6f003d1900 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=00007f6f003b0020 CR3=000000000e7fa000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=1ffff1100d9e1354 RSI=ffff888008e27e70 RDI=ffff88806cf09aa0 RBP=ffff888008e27e70 RSP=ffff88806cf099f0 R8 =ffffffff864b19c0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff888008e27e78 R15=ffff88806cf09a98 RIP=ffffffff81130445 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=00007ff845533880 CR3=000000000ca4a000 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=969c98f33f8824aed4430c79199427c4 XMM02=000000000011e5b0eff9b2d0a8fce9cb XMM03=000000000011e6802c67c8bc2e329bc3 XMM04=59d45c02fd5785f800000000000ae988 XMM05=e8f09645a01e56540000000000135940 XMM06=4fda316b135da52b0000000000135340 XMM07=e042d86d42eb936e0000000000124aa8 XMM08=cbb76c014e66d8a5000000000011e680 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000