syzkaller login: [ 37.244059] BUG: Bad rss-counter state mm:000000001d7edee5 type:MM_FILEPAGES val:33 [ 37.245734] BUG: Bad rss-counter state mm:000000001d7edee5 type:MM_ANONPAGES val:22 [ 37.403542] ================================================================== [ 37.404539] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.405607] Read of size 8 at addr ffff88800fd59140 by task sshd/219 [ 37.406381] [ 37.406599] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.407471] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.408446] Call Trace: [ 37.408766] [ 37.409052] dump_stack_lvl+0x91/0xf0 [ 37.409540] print_report+0xcc/0x620 [ 37.410021] ? __virt_addr_valid+0x102/0x340 [ 37.410572] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.411203] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.411830] kasan_report+0xbe/0xf0 [ 37.412305] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.412927] vma_interval_tree_remove+0xc75/0xec0 [ 37.413534] vma_prepare+0xc54/0x11a0 [ 37.414017] __split_vma+0x5af/0x950 [ 37.414490] ? __pfx___split_vma+0x10/0x10 [ 37.415017] ? find_held_lock+0x2c/0x110 [ 37.415555] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.416115] ? lock_is_held_type+0x9f/0x120 [ 37.416652] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.417254] ? mtree_range_walk+0x632/0x900 [ 37.417819] ? mas_walk+0x5c7/0x7c0 [ 37.418299] do_vmi_munmap+0x1f1/0x2b0 [ 37.418805] mmap_region+0x1f9/0x2660 [ 37.419300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.419822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.420553] ? __pfx_lock_acquire+0x10/0x10 [ 37.421092] ? __pfx_mmap_region+0x10/0x10 [ 37.421632] ? security_mmap_addr+0x7d/0xa0 [ 37.422165] ? get_unmapped_area+0x1f5/0x3f0 [ 37.422713] do_mmap+0x854/0xf00 [ 37.423153] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.423659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.424228] ksys_mmap_pgoff+0x3af/0x500 [ 37.424736] do_syscall_64+0x3f/0x90 [ 37.425220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.425864] RIP: 0033:0x7fb9301d6d82 [ 37.426325] 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 [ 37.428474] RSP: 002b:00007ffce5ecdcf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.429408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9301d6d82 [ 37.430288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb92f610000 [ 37.431178] RBP: 00007fb92f610000 R08: 0000000000000009 R09: 0000000000001000 [ 37.432076] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629280d7ec0 [ 37.432962] R13: 00007ffce5ecdd10 R14: 00007ffce5ecdd40 R15: 00007ffce5ece0a0 [ 37.433852] [ 37.434156] [ 37.434385] Allocated by task 212: [ 37.434829] kasan_save_stack+0x22/0x50 [ 37.435370] kasan_set_track+0x25/0x30 [ 37.435886] __kasan_slab_alloc+0x59/0x70 [ 37.436434] kmem_cache_alloc+0x16b/0x370 [ 37.436972] vm_area_dup+0x20/0x160 [ 37.437443] __split_vma+0x170/0x950 [ 37.437928] split_vma+0xc6/0x110 [ 37.438383] mprotect_fixup+0x8d2/0xb30 [ 37.438903] do_mprotect_pkey+0x87e/0xd40 [ 37.439462] __x64_sys_mprotect+0x78/0xc0 [ 37.440007] do_syscall_64+0x3f/0x90 [ 37.440502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.441171] [ 37.441398] Freed by task 212: [ 37.441808] kasan_save_stack+0x22/0x50 [ 37.442328] kasan_set_track+0x25/0x30 [ 37.442838] kasan_save_free_info+0x2b/0x50 [ 37.443407] __kasan_slab_free+0x10a/0x190 [ 37.443971] kmem_cache_free+0x10d/0x4d0 [ 37.444496] rcu_core+0x8c8/0x2860 [ 37.444957] __do_softirq+0x1b7/0x7d4 [ 37.445447] [ 37.445673] Last potentially related work creation: [ 37.446291] kasan_save_stack+0x22/0x50 [ 37.446816] __kasan_record_aux_stack+0x8e/0xa0 [ 37.447423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.448094] remove_vma+0x139/0x170 [ 37.448560] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.449140] do_vmi_munmap+0x1f1/0x2b0 [ 37.449644] __vm_munmap+0x138/0x3a0 [ 37.450134] __x64_sys_munmap+0x59/0x80 [ 37.450646] do_syscall_64+0x3f/0x90 [ 37.451137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.451821] [ 37.452046] The buggy address belongs to the object at ffff88800fd590e8 [ 37.452046] which belongs to the cache vm_area_struct of size 168 [ 37.453580] The buggy address is located 88 bytes inside of [ 37.453580] freed 168-byte region [ffff88800fd590e8, ffff88800fd59190) [ 37.455039] [ 37.455272] The buggy address belongs to the physical page: [ 37.455964] page:0000000037b2d6a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd59 [ 37.457117] memcg:ffff88800fd58101 [ 37.457557] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.458236] page_type: 0xffffffff() [ 37.458699] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 37.459661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd58101 [ 37.460602] page dumped because: kasan: bad access detected [ 37.461286] [ 37.461510] Memory state around the buggy address: [ 37.462111] ffff88800fd59000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.462996] ffff88800fd59080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 37.463903] >ffff88800fd59100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.464786] ^ [ 37.465444] ffff88800fd59180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.466333] ffff88800fd59200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.467215] ================================================================== [ 37.468239] Disabling lock debugging due to kernel taint [ 39.558428] BUG: Bad rss-counter state mm:000000004e08bddc type:MM_FILEPAGES val:33 [ 39.559615] BUG: Bad rss-counter state mm:000000004e08bddc type:MM_ANONPAGES val:22 [ 39.908629] BUG: Bad rss-counter state mm:0000000020a025de type:MM_FILEPAGES val:33 [ 39.909672] BUG: Bad rss-counter state mm:0000000020a025de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10106' (ECDSA) to the list of known hosts. 2023/06/20 01:49:26 fuzzer started 2023/06/20 01:49:26 dialing manager at localhost:44161 2023/06/20 01:49:26 checking machine... 2023/06/20 01:49:26 checking revisions... [ 40.621719] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:49:26 testing simple program... [ 40.662350] cgroup: Unknown subsys name 'net' [ 40.726077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:49:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000008 RCX=ffffffff8186b960 RDX=ffffed1001974f81 RSI=0000000000000004 RDI=ffff88800cba7c00 RBP=ffff8880093be280 RSP=ffff88806ce09e48 R8 =0000000000000001 R9 =ffffed1001974f80 R10=ffff88800cba7c03 R11=00000000000b6996 R12=ffff88800cba7c00 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff8880093be280 RIP=ffffffff8186b965 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 00007f0ccd6b4700 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=00007f3a0f03f028 CR3=000000000f6a8000 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=2036323a39343a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a39343a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81809f54 RDX=dffffc0000000000 RSI=ffffffff81809f55 RDI=ffff88800ecb7698 RBP=ffff88800ecb76f0 RSP=ffff88800ecb7628 R8 =0000000000000001 R9 =ffff88800ecb76d8 R10=0000000000038001 R11=0000000000020dae R12=ffff88800ecb76f8 R13=ffff88800ecb76e0 R14=ffff88800ecb76d9 R15=ffff88800ecb7698 RIP=ffffffff81130719 RFL=00000282 [--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 00007f32ce0e8900 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=00007f32ce08d008 CR3=000000000eb36000 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