syzkaller login: [ 67.474870] BUG: Bad rss-counter state mm:00000000a1859bfe type:MM_FILEPAGES val:33 [ 67.476274] BUG: Bad rss-counter state mm:00000000a1859bfe type:MM_ANONPAGES val:22 [ 67.624644] ================================================================== [ 67.625513] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.626387] Read of size 8 at addr ffff88800d4923f8 by task sshd/220 [ 67.627111] [ 67.627323] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.628271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.629182] Call Trace: [ 67.629505] [ 67.629793] dump_stack_lvl+0x91/0xf0 [ 67.630261] print_report+0xcc/0x620 [ 67.630717] ? __virt_addr_valid+0x102/0x340 [ 67.631241] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.631824] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.632401] kasan_report+0xbe/0xf0 [ 67.632850] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.633453] vma_interval_tree_remove+0xc75/0xec0 [ 67.634029] vma_prepare+0xc54/0x11a0 [ 67.634482] __split_vma+0x5af/0x950 [ 67.634929] ? __pfx___split_vma+0x10/0x10 [ 67.635427] ? find_held_lock+0x2c/0x110 [ 67.635919] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.636480] ? lock_is_held_type+0x9f/0x120 [ 67.637011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.637651] ? mtree_range_walk+0x632/0x900 [ 67.638192] ? mas_walk+0x5c7/0x7c0 [ 67.638661] do_vmi_munmap+0x1f1/0x2b0 [ 67.639152] mmap_region+0x1f9/0x2660 [ 67.639627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.640128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.640841] ? __pfx_lock_acquire+0x10/0x10 [ 67.641367] ? __pfx_mmap_region+0x10/0x10 [ 67.641893] ? security_mmap_addr+0x7d/0xa0 [ 67.642419] ? get_unmapped_area+0x1f5/0x3f0 [ 67.642987] do_mmap+0x854/0xf00 [ 67.643434] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.643929] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.644498] ksys_mmap_pgoff+0x3af/0x500 [ 67.644998] do_syscall_64+0x3f/0x90 [ 67.645486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.646137] RIP: 0033:0x7f9fd08e3d82 [ 67.646593] 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 [ 67.648756] RSP: 002b:00007fff22223ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.649703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fd08e3d82 [ 67.650561] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fcfd1d000 [ 67.651430] RBP: 00007f9fcfd1d000 R08: 0000000000000009 R09: 0000000000001000 [ 67.652293] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556dc7d85d90 [ 67.653162] R13: 00007fff22223bc0 R14: 00007fff22223bf0 R15: 00007fff22223f50 [ 67.654039] [ 67.654334] [ 67.654555] Allocated by task 213: [ 67.654990] kasan_save_stack+0x22/0x50 [ 67.655505] kasan_set_track+0x25/0x30 [ 67.656005] __kasan_slab_alloc+0x59/0x70 [ 67.656536] kmem_cache_alloc+0x16b/0x370 [ 67.657057] vm_area_dup+0x20/0x160 [ 67.657532] __split_vma+0x170/0x950 [ 67.658008] split_vma+0xc6/0x110 [ 67.658447] mprotect_fixup+0x8d2/0xb30 [ 67.658948] do_mprotect_pkey+0x87e/0xd40 [ 67.659479] __x64_sys_mprotect+0x78/0xc0 [ 67.660008] do_syscall_64+0x3f/0x90 [ 67.660486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.661135] [ 67.661356] Freed by task 213: [ 67.661752] kasan_save_stack+0x22/0x50 [ 67.662258] kasan_set_track+0x25/0x30 [ 67.662761] kasan_save_free_info+0x2b/0x50 [ 67.663302] __kasan_slab_free+0x10a/0x190 [ 67.663842] kmem_cache_free+0x10d/0x4d0 [ 67.664356] rcu_core+0x8c8/0x2860 [ 67.664814] __do_softirq+0x1b7/0x7d4 [ 67.665293] [ 67.665536] Last potentially related work creation: [ 67.666130] kasan_save_stack+0x22/0x50 [ 67.666643] __kasan_record_aux_stack+0x8e/0xa0 [ 67.667226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.667876] remove_vma+0x139/0x170 [ 67.668339] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.668901] do_vmi_munmap+0x1f1/0x2b0 [ 67.669396] __vm_munmap+0x138/0x3a0 [ 67.669869] __x64_sys_munmap+0x59/0x80 [ 67.670367] do_syscall_64+0x3f/0x90 [ 67.670856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.671515] [ 67.671734] The buggy address belongs to the object at ffff88800d4923a0 [ 67.671734] which belongs to the cache vm_area_struct of size 168 [ 67.673245] The buggy address is located 88 bytes inside of [ 67.673245] freed 168-byte region [ffff88800d4923a0, ffff88800d492448) [ 67.674699] [ 67.674916] The buggy address belongs to the physical page: [ 67.675610] page:0000000036eb5b70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd492 [ 67.676722] memcg:ffff88800de39d01 [ 67.677156] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.677838] page_type: 0xffffffff() [ 67.678299] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.679242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de39d01 [ 67.680157] page dumped because: kasan: bad access detected [ 67.680822] [ 67.681041] Memory state around the buggy address: [ 67.681634] ffff88800d492280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 67.682504] ffff88800d492300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 67.683373] >ffff88800d492380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 67.684236] ^ [ 67.685089] ffff88800d492400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 67.685979] ffff88800d492480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.686849] ================================================================== [ 67.687910] Disabling lock debugging due to kernel taint [ 69.494113] BUG: Bad rss-counter state mm:000000001f7fb589 type:MM_FILEPAGES val:33 [ 69.495142] BUG: Bad rss-counter state mm:000000001f7fb589 type:MM_ANONPAGES val:22 [ 69.942427] BUG: Bad rss-counter state mm:00000000d8bce7c0 type:MM_FILEPAGES val:33 [ 69.943298] BUG: Bad rss-counter state mm:00000000d8bce7c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25064' (ECDSA) to the list of known hosts. 2023/06/19 16:54:49 fuzzer started 2023/06/19 16:54:49 dialing manager at localhost:44161 2023/06/19 16:54:49 checking machine... 2023/06/19 16:54:49 checking revisions... [ 70.724751] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:54:50 testing simple program... [ 70.775845] cgroup: Unknown subsys name 'net' [ 70.835623] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:54:42 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88809023a000 RCX=ffffffff8114313a RDX=ffff888015c88000 RSI=0000000000000000 RDI=0000000000000006 RBP=000000001023a000 RSP=ffff88800ea87840 R8 =0000000000000006 R9 =ffff88809023a000 R10=000000001023a000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000000000 R15=ffff8880096473c0 RIP=ffffffff814c07eb RFL=00000286 [--S--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 00007f70a04ca900 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=00007fffa109a000 CR3=000000000e2d6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f41185a1300 CR3=000000000d5ac000 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=6968577fe66ac0b5ec4a171ed2daa4bc XMM02=000000000011cb38ec2efd57dc4c00df XMM03=00000000001244c02e100ac2b0decaa9 XMM04=a2b43bf7910f1cd400000000000ae988 XMM05=19e9129bd510f23500000000001340d8 XMM06=4fda316b135da52b0000000000133f60 XMM07=e042d86d42eb936e0000000000124740 XMM08=2e100ac2b0decaa9000000000011cb98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000