syzkaller login: [ 31.454833] BUG: Bad rss-counter state mm:000000000aa58839 type:MM_FILEPAGES val:33 [ 31.455569] BUG: Bad rss-counter state mm:000000000aa58839 type:MM_ANONPAGES val:22 [ 31.583785] ================================================================== [ 31.584478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.585170] Read of size 8 at addr ffff88800cf82310 by task sshd/221 [ 31.585716] [ 31.585869] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.586470] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.587153] Call Trace: [ 31.587382] [ 31.587584] dump_stack_lvl+0x91/0xf0 [ 31.588296] print_report+0xcc/0x620 [ 31.588637] ? __virt_addr_valid+0x102/0x340 [ 31.589037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589475] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.589911] kasan_report+0xbe/0xf0 [ 31.590255] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.590729] vma_interval_tree_remove+0xc75/0xec0 [ 31.591162] vma_prepare+0xc54/0x11a0 [ 31.591509] __split_vma+0x5af/0x950 [ 31.591866] ? __pfx___split_vma+0x10/0x10 [ 31.592235] ? find_held_lock+0x2c/0x110 [ 31.592638] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.593046] ? lock_is_held_type+0x9f/0x120 [ 31.593422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.593838] ? mtree_range_walk+0x632/0x900 [ 31.594221] ? mas_walk+0x5c7/0x7c0 [ 31.594567] do_vmi_munmap+0x1f1/0x2b0 [ 31.594925] mmap_region+0x1f9/0x2660 [ 31.595268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.595653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.596185] ? __pfx_lock_acquire+0x10/0x10 [ 31.596571] ? __pfx_mmap_region+0x10/0x10 [ 31.596944] ? security_mmap_addr+0x7d/0xa0 [ 31.597321] ? get_unmapped_area+0x1f5/0x3f0 [ 31.597710] do_mmap+0x854/0xf00 [ 31.598017] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.598350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.598752] ksys_mmap_pgoff+0x3af/0x500 [ 31.599142] do_syscall_64+0x3f/0x90 [ 31.599483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.600001] RIP: 0033:0x7f237e343d82 [ 31.600339] 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 [ 31.601811] RSP: 002b:00007fff89480158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.602463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f237e343d82 [ 31.603067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f237d77d000 [ 31.603746] RBP: 00007f237d77d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.604337] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558744ec7ec0 [ 31.604926] R13: 00007fff89480170 R14: 00007fff894801a0 R15: 00007fff89480500 [ 31.605559] [ 31.605767] [ 31.605921] Allocated by task 214: [ 31.606222] kasan_save_stack+0x22/0x50 [ 31.606591] kasan_set_track+0x25/0x30 [ 31.606973] __kasan_slab_alloc+0x59/0x70 [ 31.607341] kmem_cache_alloc+0x16b/0x370 [ 31.607766] vm_area_dup+0x20/0x160 [ 31.608085] __split_vma+0x170/0x950 [ 31.608412] split_vma+0xc6/0x110 [ 31.608724] mprotect_fixup+0x8d2/0xb30 [ 31.609080] do_mprotect_pkey+0x87e/0xd40 [ 31.609456] __x64_sys_mprotect+0x78/0xc0 [ 31.609847] do_syscall_64+0x3f/0x90 [ 31.610181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.610656] [ 31.610803] Freed by task 0: [ 31.611074] kasan_save_stack+0x22/0x50 [ 31.611436] kasan_set_track+0x25/0x30 [ 31.611967] kasan_save_free_info+0x2b/0x50 [ 31.612327] __kasan_slab_free+0x10a/0x190 [ 31.612678] kmem_cache_free+0x10d/0x4d0 [ 31.613024] rcu_core+0x8c8/0x2860 [ 31.613312] __do_softirq+0x1b7/0x7d4 [ 31.613660] [ 31.613801] Last potentially related work creation: [ 31.614183] kasan_save_stack+0x22/0x50 [ 31.614523] __kasan_record_aux_stack+0x8e/0xa0 [ 31.614934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.615356] remove_vma+0x139/0x170 [ 31.615688] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.616053] do_vmi_munmap+0x1f1/0x2b0 [ 31.616369] __vm_munmap+0x138/0x3a0 [ 31.616694] __x64_sys_munmap+0x59/0x80 [ 31.617010] do_syscall_64+0x3f/0x90 [ 31.617335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.617844] [ 31.617986] The buggy address belongs to the object at ffff88800cf822b8 [ 31.617986] which belongs to the cache vm_area_struct of size 168 [ 31.618992] The buggy address is located 88 bytes inside of [ 31.618992] freed 168-byte region [ffff88800cf822b8, ffff88800cf82360) [ 31.620004] [ 31.620156] The buggy address belongs to the physical page: [ 31.620595] page:00000000c73dda85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf82 [ 31.621297] memcg:ffff888016f7e701 [ 31.621600] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.622052] page_type: 0xffffffff() [ 31.622349] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.623032] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f7e701 [ 31.623734] page dumped because: kasan: bad access detected [ 31.624179] [ 31.624326] Memory state around the buggy address: [ 31.624762] ffff88800cf82200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.625348] ffff88800cf82280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.625943] >ffff88800cf82300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.626549] ^ [ 31.626843] ffff88800cf82380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.627389] ffff88800cf82400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.628020] ================================================================== [ 31.628758] Disabling lock debugging due to kernel taint [ 33.261278] BUG: Bad rss-counter state mm:00000000d0966df9 type:MM_FILEPAGES val:33 [ 33.262101] BUG: Bad rss-counter state mm:00000000d0966df9 type:MM_ANONPAGES val:22 [ 33.692252] BUG: Bad rss-counter state mm:00000000ffd18c55 type:MM_FILEPAGES val:33 [ 33.692934] BUG: Bad rss-counter state mm:00000000ffd18c55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2354' (ECDSA) to the list of known hosts. 2023/06/21 08:31:35 fuzzer started 2023/06/21 08:31:35 dialing manager at localhost:36067 2023/06/21 08:31:35 checking machine... 2023/06/21 08:31:35 checking revisions... [ 34.180800] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:31:35 testing simple program... [ 34.214798] cgroup: Unknown subsys name 'net' [ 34.260400] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:31:35 Registers: info registers vcpu 0 RAX=0000000000010b8d RBX=0000000000000002 RCX=ffffffff813ad71f RDX=0000000000010b9e RSI=0000000000003ad7 RDI=ffffffff860d82bc RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d8256 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130861 RFL=00000293 [--S-A-C] 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 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=00007faad1c42590 CR3=000000000c4da000 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=52406f44004562ab604372bd76e0e0ce XMM02=000000000011b2e0eff9b2d0a8fce9cb XMM03=000000000011b3b02c67c8bc2e329bc3 XMM04=8ddb8dc19f55674700000000000ae988 XMM05=1b2a775a4cf8475600000000001327b0 XMM06=c291bd5c70af25b900000000001321a8 XMM07=e042d86d42eb936e00000000001226e0 XMM08=eca1852641f3d772000000000011b3b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810727 RSP=ffff88806cf09de8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000200 R13=ffffea000059c100 R14=ffffffff813782f8 R15=ffff88800dd07100 RIP=ffffffff815343fe RFL=00000047 [---Z-PC] 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 00007fc399653900 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=00007fc399632020 CR3=000000000e73a000 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=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