syzkaller login: [ 33.060767] BUG: Bad rss-counter state mm:00000000bd028f3a type:MM_FILEPAGES val:33 [ 33.062029] BUG: Bad rss-counter state mm:00000000bd028f3a type:MM_ANONPAGES val:22 [ 33.214550] ================================================================== [ 33.215579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.216692] Read of size 8 at addr ffff88801683a058 by task sshd/220 [ 33.217518] [ 33.217755] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.218711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.219740] Call Trace: [ 33.220092] [ 33.220410] dump_stack_lvl+0x91/0xf0 [ 33.220934] print_report+0xcc/0x620 [ 33.221451] ? __virt_addr_valid+0x102/0x340 [ 33.222041] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.222721] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.223383] kasan_report+0xbe/0xf0 [ 33.223895] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.224563] vma_interval_tree_remove+0xc75/0xec0 [ 33.225192] vma_prepare+0xc54/0x11a0 [ 33.225686] __split_vma+0x5af/0x950 [ 33.226205] ? __pfx___split_vma+0x10/0x10 [ 33.226810] ? find_held_lock+0x2c/0x110 [ 33.227362] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.227956] ? lock_is_held_type+0x9f/0x120 [ 33.228545] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.229204] ? mtree_range_walk+0x632/0x900 [ 33.229793] ? mas_walk+0x5c7/0x7c0 [ 33.230304] do_vmi_munmap+0x1f1/0x2b0 [ 33.230858] mmap_region+0x1f9/0x2660 [ 33.231364] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.231924] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.232672] ? __pfx_lock_acquire+0x10/0x10 [ 33.233240] ? __pfx_mmap_region+0x10/0x10 [ 33.233818] ? security_mmap_addr+0x7d/0xa0 [ 33.234391] ? get_unmapped_area+0x1f5/0x3f0 [ 33.234996] do_mmap+0x854/0xf00 [ 33.235472] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.236014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.236623] ksys_mmap_pgoff+0x3af/0x500 [ 33.237167] do_syscall_64+0x3f/0x90 [ 33.237702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.238408] RIP: 0033:0x7fadeee9dd82 [ 33.238900] 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 [ 33.241174] RSP: 002b:00007fff31ba3cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.242139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadeee9dd82 [ 33.243064] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadee2d7000 [ 33.243988] RBP: 00007fadee2d7000 R08: 0000000000000009 R09: 0000000000001000 [ 33.244880] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d922fbec0 [ 33.245806] R13: 00007fff31ba3ce0 R14: 00007fff31ba3d10 R15: 00007fff31ba4070 [ 33.246744] [ 33.247061] [ 33.247294] Allocated by task 213: [ 33.247756] kasan_save_stack+0x22/0x50 [ 33.248295] kasan_set_track+0x25/0x30 [ 33.248824] __kasan_slab_alloc+0x59/0x70 [ 33.249406] kmem_cache_alloc+0x16b/0x370 [ 33.249987] vm_area_dup+0x20/0x160 [ 33.250497] __split_vma+0x170/0x950 [ 33.251009] split_vma+0xc6/0x110 [ 33.251459] mprotect_fixup+0x8d2/0xb30 [ 33.252005] do_mprotect_pkey+0x87e/0xd40 [ 33.252571] __x64_sys_mprotect+0x78/0xc0 [ 33.253100] do_syscall_64+0x3f/0x90 [ 33.253620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.254319] [ 33.254556] Freed by task 203: [ 33.254985] kasan_save_stack+0x22/0x50 [ 33.255518] kasan_set_track+0x25/0x30 [ 33.256067] kasan_save_free_info+0x2b/0x50 [ 33.256659] __kasan_slab_free+0x10a/0x190 [ 33.257237] kmem_cache_free+0x10d/0x4d0 [ 33.257794] rcu_core+0x8c8/0x2860 [ 33.258287] __do_softirq+0x1b7/0x7d4 [ 33.258795] [ 33.259045] Last potentially related work creation: [ 33.259671] kasan_save_stack+0x22/0x50 [ 33.260210] __kasan_record_aux_stack+0x8e/0xa0 [ 33.260832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.261527] remove_vma+0x139/0x170 [ 33.262016] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.262638] do_vmi_munmap+0x1f1/0x2b0 [ 33.263187] __vm_munmap+0x138/0x3a0 [ 33.263691] __x64_sys_munmap+0x59/0x80 [ 33.264227] do_syscall_64+0x3f/0x90 [ 33.264753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.265441] [ 33.265675] The buggy address belongs to the object at ffff88801683a000 [ 33.265675] which belongs to the cache vm_area_struct of size 168 [ 33.267253] The buggy address is located 88 bytes inside of [ 33.267253] freed 168-byte region [ffff88801683a000, ffff88801683a0a8) [ 33.268778] [ 33.269003] The buggy address belongs to the physical page: [ 33.269734] page:00000000f2b00c31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1683a [ 33.270919] memcg:ffff8880099b8001 [ 33.271393] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.272087] page_type: 0xffffffff() [ 33.272579] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.273554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099b8001 [ 33.274532] page dumped because: kasan: bad access detected [ 33.275267] [ 33.275518] Memory state around the buggy address: [ 33.276150] ffff888016839f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.277085] ffff888016839f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.278009] >ffff88801683a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.278928] ^ [ 33.279738] ffff88801683a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.280664] ffff88801683a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.281591] ================================================================== [ 33.282791] Disabling lock debugging due to kernel taint [ 35.229813] BUG: Bad rss-counter state mm:0000000005825941 type:MM_FILEPAGES val:33 [ 35.230801] BUG: Bad rss-counter state mm:0000000005825941 type:MM_ANONPAGES val:22 [ 35.763569] BUG: Bad rss-counter state mm:0000000075f14431 type:MM_FILEPAGES val:33 [ 35.764754] BUG: Bad rss-counter state mm:0000000075f14431 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19526' (ECDSA) to the list of known hosts. 2023/06/19 11:57:59 fuzzer started 2023/06/19 11:57:59 dialing manager at localhost:44161 2023/06/19 11:57:59 checking machine... 2023/06/19 11:57:59 checking revisions... [ 36.411447] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:58:00 testing simple program... [ 36.450248] cgroup: Unknown subsys name 'net' [ 36.519424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:57:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff813ad420 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888015877788 RSP=ffff888015877720 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff8880158777f8 R13=0000000000000000 R14=ffff888019d60000 R15=0000000000000000 RIP=ffffffff8113036f RFL=00000246 [---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 00007f50f1887900 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=00007fffaa694000 CR3=000000000d5d6000 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=fbfbfbfbfbfbfbfb RBX=0000000000000000 RCX=0000000000000002 RDX=000000000000003a RSI=00000000000000fb RDI=ffffed1001c5d2a0 RBP=ffffffff8186b9c5 RSP=ffff88806cf09de0 R8 =0000000000000280 R9 =0000000000000000 R10=ffffed1001c5d280 R11=0000000000000000 R12=ffff88800e2e9400 R13=ffff8880087b6780 R14=ffffffff8186b9c5 R15=ffff88801593a500 RIP=ffffffff8450d445 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 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=00007f100209f910 CR3=000000000d630000 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=7e69952d40c0079479411c7128496278 XMM02=000000000011c0e0ec2efd57dc4c00df XMM03=0000000000123950d5e433abd6a10d77 XMM04=e87e00391a4ef6d600000000000ae988 XMM05=e4cb8bb95a7664b60000000000133558 XMM06=c291bd5c70af25b900000000001333e0 XMM07=e042d86d42eb936e0000000000123bd0 XMM08=d5e433abd6a10d77000000000011c140 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000