syzkaller login: [ 32.626675] BUG: Bad rss-counter state mm:00000000fa6e04e2 type:MM_FILEPAGES val:33 [ 32.627836] BUG: Bad rss-counter state mm:00000000fa6e04e2 type:MM_ANONPAGES val:22 [ 32.771992] ================================================================== [ 32.772928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.773800] Read of size 8 at addr ffff88801806b3f8 by task sshd/220 [ 32.774519] [ 32.774727] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.775680] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.776638] Call Trace: [ 32.776971] [ 32.777261] dump_stack_lvl+0x91/0xf0 [ 32.777724] print_report+0xcc/0x620 [ 32.778181] ? __virt_addr_valid+0x102/0x340 [ 32.778702] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.779278] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.779860] kasan_report+0xbe/0xf0 [ 32.780324] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.780949] vma_interval_tree_remove+0xc75/0xec0 [ 32.781522] vma_prepare+0xc54/0x11a0 [ 32.782002] __split_vma+0x5af/0x950 [ 32.782472] ? __pfx___split_vma+0x10/0x10 [ 32.782986] ? find_held_lock+0x2c/0x110 [ 32.783503] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.784066] ? lock_is_held_type+0x9f/0x120 [ 32.784642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.785268] ? mtree_range_walk+0x632/0x900 [ 32.785820] ? mas_walk+0x5c7/0x7c0 [ 32.786283] do_vmi_munmap+0x1f1/0x2b0 [ 32.786776] mmap_region+0x1f9/0x2660 [ 32.787238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.787742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.788489] ? __pfx_lock_acquire+0x10/0x10 [ 32.789033] ? __pfx_mmap_region+0x10/0x10 [ 32.789552] ? security_mmap_addr+0x7d/0xa0 [ 32.790076] ? get_unmapped_area+0x1f5/0x3f0 [ 32.790611] do_mmap+0x854/0xf00 [ 32.791040] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.791534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.792079] ksys_mmap_pgoff+0x3af/0x500 [ 32.792625] do_syscall_64+0x3f/0x90 [ 32.793126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.793761] RIP: 0033:0x7ff91475ed82 [ 32.794209] 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 [ 32.796321] RSP: 002b:00007ffe04ddde68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.797272] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff91475ed82 [ 32.798106] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff913b98000 [ 32.798939] RBP: 00007ff913b98000 R08: 0000000000000009 R09: 0000000000001000 [ 32.799774] R10: 0000000000000812 R11: 0000000000000206 R12: 000055713d5b7980 [ 32.800668] R13: 00007ffe04ddde80 R14: 00007ffe04dddeb0 R15: 00007ffe04dde210 [ 32.801520] [ 32.801811] [ 32.802021] Allocated by task 213: [ 32.802453] kasan_save_stack+0x22/0x50 [ 32.802942] kasan_set_track+0x25/0x30 [ 32.803431] __kasan_slab_alloc+0x59/0x70 [ 32.803950] kmem_cache_alloc+0x16b/0x370 [ 32.804499] vm_area_dup+0x20/0x160 [ 32.804983] __split_vma+0x170/0x950 [ 32.805454] split_vma+0xc6/0x110 [ 32.805892] mprotect_fixup+0x8d2/0xb30 [ 32.806392] do_mprotect_pkey+0x87e/0xd40 [ 32.806904] __x64_sys_mprotect+0x78/0xc0 [ 32.807410] do_syscall_64+0x3f/0x90 [ 32.807867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.808538] [ 32.808767] Freed by task 213: [ 32.809156] kasan_save_stack+0x22/0x50 [ 32.809661] kasan_set_track+0x25/0x30 [ 32.810142] kasan_save_free_info+0x2b/0x50 [ 32.810661] __kasan_slab_free+0x10a/0x190 [ 32.811188] kmem_cache_free+0x10d/0x4d0 [ 32.811683] rcu_core+0x8c8/0x2860 [ 32.812117] __do_softirq+0x1b7/0x7d4 [ 32.812631] [ 32.812873] Last potentially related work creation: [ 32.813446] kasan_save_stack+0x22/0x50 [ 32.813944] __kasan_record_aux_stack+0x8e/0xa0 [ 32.814508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.815148] remove_vma+0x139/0x170 [ 32.815596] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.816195] do_vmi_munmap+0x1f1/0x2b0 [ 32.816730] __vm_munmap+0x138/0x3a0 [ 32.817187] __x64_sys_munmap+0x59/0x80 [ 32.817679] do_syscall_64+0x3f/0x90 [ 32.818145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.818781] [ 32.818995] The buggy address belongs to the object at ffff88801806b3a0 [ 32.818995] which belongs to the cache vm_area_struct of size 168 [ 32.820494] The buggy address is located 88 bytes inside of [ 32.820494] freed 168-byte region [ffff88801806b3a0, ffff88801806b448) [ 32.821917] [ 32.822128] The buggy address belongs to the physical page: [ 32.822787] page:00000000d5e3e4de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1806b [ 32.823864] memcg:ffff88801660a501 [ 32.824296] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.825002] page_type: 0xffffffff() [ 32.825453] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.826368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801660a501 [ 32.827268] page dumped because: kasan: bad access detected [ 32.827925] [ 32.828137] Memory state around the buggy address: [ 32.828777] ffff88801806b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.829629] ffff88801806b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.830479] >ffff88801806b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.831305] ^ [ 32.832130] ffff88801806b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.833040] ffff88801806b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.833887] ================================================================== [ 32.834798] Disabling lock debugging due to kernel taint [ 35.008236] BUG: Bad rss-counter state mm:00000000595860c8 type:MM_FILEPAGES val:33 [ 35.009225] BUG: Bad rss-counter state mm:00000000595860c8 type:MM_ANONPAGES val:22 [ 35.479416] BUG: Bad rss-counter state mm:00000000677270c5 type:MM_FILEPAGES val:33 [ 35.480675] BUG: Bad rss-counter state mm:00000000677270c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44330' (ECDSA) to the list of known hosts. 2023/06/20 04:31:59 fuzzer started 2023/06/20 04:31:59 dialing manager at localhost:44161 2023/06/20 04:31:59 checking machine... 2023/06/20 04:31:59 checking revisions... [ 36.223645] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:31:59 testing simple program... [ 36.272563] cgroup: Unknown subsys name 'net' [ 36.325001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:31:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014367c01 RSI=ffff888014367c88 RDI=ffff888014367c88 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f99 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888014367c88 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f7a7f52c900 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=00005633389e9768 CR3=000000000c780000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=54f0c4b11c40c8fa00000000000ae988 XMM05=442f79032a4f50b90000000000134ca8 XMM06=4fda316b135da52b0000000000133d48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c26ea3 RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88801ca0f998 RBP=ffff88801ca0f988 RSP=ffff88801ca0f8c0 R8 =ffffffff8613751e R9 =ffff88801ca0f970 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801ca0f990 R13=ffff88801ca0f978 R14=ffff88801ca0fc80 R15=ffff88801ca0f930 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007f862852d900 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=00007ffca3f51000 CR3=0000000016edc000 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=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