syzkaller login: [ 38.671178] BUG: Bad rss-counter state mm:00000000bf774184 type:MM_FILEPAGES val:33 [ 38.673117] BUG: Bad rss-counter state mm:00000000bf774184 type:MM_ANONPAGES val:22 [ 38.830957] ================================================================== [ 38.832100] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.833410] Read of size 8 at addr ffff888015a94228 by task sshd/220 [ 38.834364] [ 38.834645] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.835723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.837001] Call Trace: [ 38.837368] [ 38.837669] dump_stack_lvl+0x91/0xf0 [ 38.838187] print_report+0xcc/0x620 [ 38.838696] ? __virt_addr_valid+0x102/0x340 [ 38.839280] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.839930] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.840604] kasan_report+0xbe/0xf0 [ 38.841111] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.841774] vma_interval_tree_remove+0xc75/0xec0 [ 38.842408] vma_prepare+0xc54/0x11a0 [ 38.842916] __split_vma+0x5af/0x950 [ 38.843418] ? __pfx___split_vma+0x10/0x10 [ 38.843980] ? find_held_lock+0x2c/0x110 [ 38.844549] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.845160] ? lock_is_held_type+0x9f/0x120 [ 38.845744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.846398] ? mtree_range_walk+0x632/0x900 [ 38.846986] ? mas_walk+0x5c7/0x7c0 [ 38.847485] do_vmi_munmap+0x1f1/0x2b0 [ 38.848022] mmap_region+0x1f9/0x2660 [ 38.848559] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.849111] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.849878] ? __pfx_lock_acquire+0x10/0x10 [ 38.850442] ? __pfx_mmap_region+0x10/0x10 [ 38.851001] ? security_mmap_addr+0x7d/0xa0 [ 38.851562] ? get_unmapped_area+0x1f5/0x3f0 [ 38.852154] do_mmap+0x854/0xf00 [ 38.852643] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.853168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.853766] ksys_mmap_pgoff+0x3af/0x500 [ 38.854306] do_syscall_64+0x3f/0x90 [ 38.854822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.855510] RIP: 0033:0x7f474d16bd82 [ 38.855987] 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 [ 38.858254] RSP: 002b:00007ffde6a5fec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.859220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f474d16bd82 [ 38.860117] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f474c5a5000 [ 38.861051] RBP: 00007f474c5a5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.861945] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578e4ac7ec0 [ 38.862850] R13: 00007ffde6a5fee0 R14: 00007ffde6a5ff10 R15: 00007ffde6a60270 [ 38.863751] [ 38.864062] [ 38.864293] Allocated by task 213: [ 38.864750] kasan_save_stack+0x22/0x50 [ 38.865279] kasan_set_track+0x25/0x30 [ 38.865809] __kasan_slab_alloc+0x59/0x70 [ 38.866371] kmem_cache_alloc+0x16b/0x370 [ 38.866921] vm_area_dup+0x20/0x160 [ 38.867405] __split_vma+0x170/0x950 [ 38.867897] split_vma+0xc6/0x110 [ 38.868380] mprotect_fixup+0x8d2/0xb30 [ 38.868911] do_mprotect_pkey+0x87e/0xd40 [ 38.869471] __x64_sys_mprotect+0x78/0xc0 [ 38.870019] do_syscall_64+0x3f/0x90 [ 38.870530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871213] [ 38.871439] Freed by task 213: [ 38.871849] kasan_save_stack+0x22/0x50 [ 38.872399] kasan_set_track+0x25/0x30 [ 38.872929] kasan_save_free_info+0x2b/0x50 [ 38.873495] __kasan_slab_free+0x10a/0x190 [ 38.874065] kmem_cache_free+0x10d/0x4d0 [ 38.874615] rcu_core+0x8c8/0x2860 [ 38.875094] __do_softirq+0x1b7/0x7d4 [ 38.875619] [ 38.875850] Last potentially related work creation: [ 38.876493] kasan_save_stack+0x22/0x50 [ 38.877030] __kasan_record_aux_stack+0x8e/0xa0 [ 38.877638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.878320] remove_vma+0x139/0x170 [ 38.878805] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.879395] do_vmi_munmap+0x1f1/0x2b0 [ 38.879906] __vm_munmap+0x138/0x3a0 [ 38.880443] __x64_sys_munmap+0x59/0x80 [ 38.880985] do_syscall_64+0x3f/0x90 [ 38.881502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.882179] [ 38.882407] The buggy address belongs to the object at ffff888015a941d0 [ 38.882407] which belongs to the cache vm_area_struct of size 168 [ 38.883982] The buggy address is located 88 bytes inside of [ 38.883982] freed 168-byte region [ffff888015a941d0, ffff888015a94278) [ 38.885516] [ 38.885749] The buggy address belongs to the physical page: [ 38.886445] page:000000008b490740 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a94 [ 38.887592] memcg:ffff88800e218101 [ 38.888040] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.888812] page_type: 0xffffffff() [ 38.889292] raw: 0100000000000200 ffff8880087a0c80 ffffea0000687340 dead000000000003 [ 38.890263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e218101 [ 38.891219] page dumped because: kasan: bad access detected [ 38.891902] [ 38.892133] Memory state around the buggy address: [ 38.892766] ffff888015a94100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.893684] ffff888015a94180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.894593] >ffff888015a94200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.895521] ^ [ 38.896104] ffff888015a94280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.897048] ffff888015a94300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.897953] ================================================================== [ 38.899154] Disabling lock debugging due to kernel taint [ 40.925420] BUG: Bad rss-counter state mm:000000007f3c40b2 type:MM_FILEPAGES val:33 [ 40.926411] BUG: Bad rss-counter state mm:000000007f3c40b2 type:MM_ANONPAGES val:22 [ 41.395816] BUG: Bad rss-counter state mm:0000000024696b14 type:MM_FILEPAGES val:33 [ 41.397403] BUG: Bad rss-counter state mm:0000000024696b14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34134' (ECDSA) to the list of known hosts. 2023/06/21 01:55:45 fuzzer started 2023/06/21 01:55:45 dialing manager at localhost:36067 2023/06/21 01:55:45 checking machine... 2023/06/21 01:55:45 checking revisions... [ 42.140456] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:55:45 testing simple program... [ 42.192107] cgroup: Unknown subsys name 'net' [ 42.266659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:55:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180803a RDX=0000000000000002 RSI=ffffffff861386ee RDI=ffffffff85dfdb08 RBP=ffffffff85dfdb08 RSP=ffff88800f5ef160 R8 =ffffffff861386ee R9 =ffff88800f5ef258 R10=0000000000038001 R11=0000000000020c51 R12=ffffffff85dfdb10 R13=ffffffff85dfdb08 R14=ffffffff85dfdb08 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000212 [----A--] 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 00007f110b347900 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=00007f110a7409c0 CR3=000000000edda000 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=cf0ff20b34d980cd00000000000ae988 XMM05=ac19176095c923a70000000000132940 XMM06=4fda316b135da52b00000000001313c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000000081a4 RCX=0000000000000000 RDX=1ffff1100326f901 RSI=ffffffff81993f9d RDI=ffff88800dd24410 RBP=ffff88800ca46580 RSP=ffff88800fe5fe98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800dd24280 R13=ffff88801937c808 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81993fee 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 00007f755c403900 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=000056436b200954 CR3=000000001a276000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000