syzkaller login: [ 31.991248] BUG: Bad rss-counter state mm:0000000005107ed4 type:MM_FILEPAGES val:33 [ 31.993002] BUG: Bad rss-counter state mm:0000000005107ed4 type:MM_ANONPAGES val:22 [ 32.150810] ================================================================== [ 32.151765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.152735] Read of size 8 at addr ffff8880095f6228 by task sshd/221 [ 32.153524] [ 32.153765] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.154826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.155826] Call Trace: [ 32.156158] [ 32.156452] dump_stack_lvl+0x91/0xf0 [ 32.156959] print_report+0xcc/0x620 [ 32.157475] ? __virt_addr_valid+0x102/0x340 [ 32.158070] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.158707] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.159348] kasan_report+0xbe/0xf0 [ 32.159823] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.160433] vma_interval_tree_remove+0xc75/0xec0 [ 32.161043] vma_prepare+0xc54/0x11a0 [ 32.161519] __split_vma+0x5af/0x950 [ 32.162003] ? __pfx___split_vma+0x10/0x10 [ 32.162536] ? find_held_lock+0x2c/0x110 [ 32.163059] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.163623] ? lock_is_held_type+0x9f/0x120 [ 32.164160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.164773] ? mtree_range_walk+0x632/0x900 [ 32.165327] ? mas_walk+0x5c7/0x7c0 [ 32.165812] do_vmi_munmap+0x1f1/0x2b0 [ 32.166306] mmap_region+0x1f9/0x2660 [ 32.166786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.167291] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.168006] ? __pfx_lock_acquire+0x10/0x10 [ 32.168536] ? __pfx_mmap_region+0x10/0x10 [ 32.169060] ? security_mmap_addr+0x7d/0xa0 [ 32.169599] ? get_unmapped_area+0x1f5/0x3f0 [ 32.170153] do_mmap+0x854/0xf00 [ 32.170589] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.171087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.171643] ksys_mmap_pgoff+0x3af/0x500 [ 32.172154] do_syscall_64+0x3f/0x90 [ 32.172628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.173279] RIP: 0033:0x7f1458253d82 [ 32.173742] 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 [ 32.175861] RSP: 002b:00007fff97ff2918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.176764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1458253d82 [ 32.177629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f145768d000 [ 32.178471] RBP: 00007f145768d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.179313] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574f1314b20 [ 32.180154] R13: 00007fff97ff2930 R14: 00007fff97ff2960 R15: 00007fff97ff2cc0 [ 32.181004] [ 32.181295] [ 32.181510] Allocated by task 214: [ 32.181950] kasan_save_stack+0x22/0x50 [ 32.182451] kasan_set_track+0x25/0x30 [ 32.182952] __kasan_slab_alloc+0x59/0x70 [ 32.183483] kmem_cache_alloc+0x16b/0x370 [ 32.184000] vm_area_dup+0x20/0x160 [ 32.184449] __split_vma+0x170/0x950 [ 32.184924] split_vma+0xc6/0x110 [ 32.185366] mprotect_fixup+0x8d2/0xb30 [ 32.185878] do_mprotect_pkey+0x87e/0xd40 [ 32.186415] __x64_sys_mprotect+0x78/0xc0 [ 32.186930] do_syscall_64+0x3f/0x90 [ 32.187411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.188061] [ 32.188280] Freed by task 211: [ 32.188679] kasan_save_stack+0x22/0x50 [ 32.189183] kasan_set_track+0x25/0x30 [ 32.189697] kasan_save_free_info+0x2b/0x50 [ 32.190226] __kasan_slab_free+0x10a/0x190 [ 32.190756] kmem_cache_free+0x10d/0x4d0 [ 32.191262] rcu_core+0x8c8/0x2860 [ 32.191702] __do_softirq+0x1b7/0x7d4 [ 32.192176] [ 32.192391] Last potentially related work creation: [ 32.192972] kasan_save_stack+0x22/0x50 [ 32.193473] __kasan_record_aux_stack+0x8e/0xa0 [ 32.194063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.194703] remove_vma+0x139/0x170 [ 32.195151] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.195762] do_vmi_munmap+0x1f1/0x2b0 [ 32.196248] __vm_munmap+0x138/0x3a0 [ 32.196710] __x64_sys_munmap+0x59/0x80 [ 32.197205] do_syscall_64+0x3f/0x90 [ 32.197693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.198337] [ 32.198551] The buggy address belongs to the object at ffff8880095f61d0 [ 32.198551] which belongs to the cache vm_area_struct of size 168 [ 32.200018] The buggy address is located 88 bytes inside of [ 32.200018] freed 168-byte region [ffff8880095f61d0, ffff8880095f6278) [ 32.201420] [ 32.201645] The buggy address belongs to the physical page: [ 32.202303] page:0000000084d5f6ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95f6 [ 32.203379] memcg:ffff88800db96701 [ 32.203812] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.204451] page_type: 0xffffffff() [ 32.204894] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.205832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db96701 [ 32.206736] page dumped because: kasan: bad access detected [ 32.207391] [ 32.207604] Memory state around the buggy address: [ 32.208190] ffff8880095f6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.209046] ffff8880095f6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.209898] >ffff8880095f6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.210737] ^ [ 32.211292] ffff8880095f6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.212153] ffff8880095f6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.213002] ================================================================== [ 32.214115] Disabling lock debugging due to kernel taint [ 34.064819] BUG: Bad rss-counter state mm:0000000034af0ff6 type:MM_FILEPAGES val:33 [ 34.065639] BUG: Bad rss-counter state mm:0000000034af0ff6 type:MM_ANONPAGES val:22 [ 34.629848] BUG: Bad rss-counter state mm:00000000fc517d15 type:MM_FILEPAGES val:33 [ 34.630990] BUG: Bad rss-counter state mm:00000000fc517d15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2415' (ECDSA) to the list of known hosts. 2023/06/20 06:07:00 fuzzer started 2023/06/20 06:07:00 dialing manager at localhost:44161 2023/06/20 06:07:00 checking machine... 2023/06/20 06:07:00 checking revisions... [ 35.260852] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:07:01 testing simple program... [ 35.313884] cgroup: Unknown subsys name 'net' [ 35.354037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:06:58 Registers: info registers vcpu 0 RAX=ffff88800d61ac38 RBX=ffff88800d5f0c48 RCX=1ffff11001db67dc RDX=dffffc0000000000 RSI=ffff88800d618950 RDI=ffff88800d5f0c78 RBP=ffff88800edb3eb0 RSP=ffff888015e67a28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800d618780 R13=0000000000000000 R14=ffff88800f9ea898 R15=ffff88800f9ea850 RIP=ffffffff81847508 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 00007f829b3d1900 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=00007ffc4bc84000 CR3=000000000dae4000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f6296389170 CR3=000000000caba000 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=d0b0f47cbc300f801742d64e70a6b267 XMM02=2c67c8bc2e329bc30000000000122200 XMM03=fb795ef6d65770560000000000125290 XMM04=eea27ccbb69677cb00000000000ae988 XMM05=000088961d2375e70000000000135318 XMM06=c291bd5c70af25b90000000000134d10 XMM07=e042d86d42eb936e0000000000125510 XMM08=24b9cff38cb9778a0000000000122260 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000