syzkaller login: [ 29.907384] BUG: Bad rss-counter state mm:000000004f8260f5 type:MM_FILEPAGES val:33 [ 29.908980] BUG: Bad rss-counter state mm:000000004f8260f5 type:MM_ANONPAGES val:22 [ 30.073249] ================================================================== [ 30.074145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.075074] Read of size 8 at addr ffff8880168e9b38 by task sshd/219 [ 30.075978] [ 30.076203] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.077051] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.078013] Call Trace: [ 30.078328] [ 30.078608] dump_stack_lvl+0x91/0xf0 [ 30.079092] print_report+0xcc/0x620 [ 30.079577] ? __virt_addr_valid+0x102/0x340 [ 30.080127] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.080753] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.081373] kasan_report+0xbe/0xf0 [ 30.081845] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.082463] vma_interval_tree_remove+0xc75/0xec0 [ 30.083054] vma_prepare+0xc54/0x11a0 [ 30.083531] __split_vma+0x5af/0x950 [ 30.084003] ? __pfx___split_vma+0x10/0x10 [ 30.084553] ? find_held_lock+0x2c/0x110 [ 30.085069] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.085626] ? lock_is_held_type+0x9f/0x120 [ 30.086162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.086768] ? mtree_range_walk+0x632/0x900 [ 30.087314] ? mas_walk+0x5c7/0x7c0 [ 30.087784] do_vmi_munmap+0x1f1/0x2b0 [ 30.088305] mmap_region+0x1f9/0x2660 [ 30.088795] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.089301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.090010] ? __pfx_lock_acquire+0x10/0x10 [ 30.090542] ? __pfx_mmap_region+0x10/0x10 [ 30.091065] ? security_mmap_addr+0x7d/0xa0 [ 30.091592] ? get_unmapped_area+0x1f5/0x3f0 [ 30.092143] do_mmap+0x854/0xf00 [ 30.092602] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.093093] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.093648] ksys_mmap_pgoff+0x3af/0x500 [ 30.094151] do_syscall_64+0x3f/0x90 [ 30.094628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.095275] RIP: 0033:0x7f3ade3eed82 [ 30.095730] 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 [ 30.097843] RSP: 002b:00007ffdf28ed0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.098735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ade3eed82 [ 30.099579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3add828000 [ 30.100429] RBP: 00007f3add828000 R08: 0000000000000009 R09: 0000000000001000 [ 30.101268] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563dbf793f70 [ 30.102107] R13: 00007ffdf28ed0d0 R14: 00007ffdf28ed100 R15: 00007ffdf28ed460 [ 30.102956] [ 30.103246] [ 30.103469] Allocated by task 212: [ 30.103896] kasan_save_stack+0x22/0x50 [ 30.104414] kasan_set_track+0x25/0x30 [ 30.104904] __kasan_slab_alloc+0x59/0x70 [ 30.105429] kmem_cache_alloc+0x16b/0x370 [ 30.105940] vm_area_dup+0x20/0x160 [ 30.106395] __split_vma+0x170/0x950 [ 30.106864] split_vma+0xc6/0x110 [ 30.107294] mprotect_fixup+0x8d2/0xb30 [ 30.107794] do_mprotect_pkey+0x87e/0xd40 [ 30.108316] __x64_sys_mprotect+0x78/0xc0 [ 30.108832] do_syscall_64+0x3f/0x90 [ 30.109310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.109951] [ 30.110162] Freed by task 13: [ 30.110543] kasan_save_stack+0x22/0x50 [ 30.111044] kasan_set_track+0x25/0x30 [ 30.111537] kasan_save_free_info+0x2b/0x50 [ 30.112072] __kasan_slab_free+0x10a/0x190 [ 30.112618] kmem_cache_free+0x10d/0x4d0 [ 30.113120] rcu_core+0x8c8/0x2860 [ 30.113569] __do_softirq+0x1b7/0x7d4 [ 30.114049] [ 30.114266] Last potentially related work creation: [ 30.114856] kasan_save_stack+0x22/0x50 [ 30.115366] __kasan_record_aux_stack+0x8e/0xa0 [ 30.115964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.116678] remove_vma+0x139/0x170 [ 30.117168] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.117772] do_vmi_munmap+0x1f1/0x2b0 [ 30.118296] __vm_munmap+0x138/0x3a0 [ 30.118799] __x64_sys_munmap+0x59/0x80 [ 30.119332] do_syscall_64+0x3f/0x90 [ 30.119849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.120564] [ 30.120803] The buggy address belongs to the object at ffff8880168e9ae0 [ 30.120803] which belongs to the cache vm_area_struct of size 168 [ 30.122467] The buggy address is located 88 bytes inside of [ 30.122467] freed 168-byte region [ffff8880168e9ae0, ffff8880168e9b88) [ 30.124055] [ 30.124300] The buggy address belongs to the physical page: [ 30.125045] page:000000003fcc1cb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168e9 [ 30.126251] memcg:ffff888009780801 [ 30.126715] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.127427] page_type: 0xffffffff() [ 30.127914] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.128943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009780801 [ 30.129936] page dumped because: kasan: bad access detected [ 30.130657] [ 30.130888] Memory state around the buggy address: [ 30.131523] ffff8880168e9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.132454] ffff8880168e9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.133379] >ffff8880168e9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.134296] ^ [ 30.134962] ffff8880168e9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.135878] ffff8880168e9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.136804] ================================================================== [ 30.137865] Disabling lock debugging due to kernel taint [ 31.988182] BUG: Bad rss-counter state mm:00000000a84ce308 type:MM_FILEPAGES val:33 [ 31.989233] BUG: Bad rss-counter state mm:00000000a84ce308 type:MM_ANONPAGES val:22 [ 32.558570] BUG: Bad rss-counter state mm:000000002c80f1c9 type:MM_FILEPAGES val:33 [ 32.559772] BUG: Bad rss-counter state mm:000000002c80f1c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46710' (ECDSA) to the list of known hosts. 2023/06/20 14:22:31 fuzzer started 2023/06/20 14:22:31 dialing manager at localhost:36067 2023/06/20 14:22:31 checking machine... 2023/06/20 14:22:31 checking revisions... [ 33.191247] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:22:31 testing simple program... [ 33.235732] cgroup: Unknown subsys name 'net' [ 33.275054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:22:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81809add RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e10 RDI=ffffffff81809add RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015d51b40 R15=ffff88800cf59a00 RIP=ffffffff811fc7a0 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 00007f124b402700 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=00007fe42a663c10 CR3=000000000dc58000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343030 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c60da90 RBX=ffff888018a5e780 RCX=000000000000000a RDX=0000000000002880 RSI=ffff88800c60da00 RDI=ffff888008fae500 RBP=ffff888008e37d20 RSP=ffff888008e37cf0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff888008fae500 R13=ffffea0000629600 R14=ffffffff818d9c06 R15=ffff88800d906500 RIP=ffffffff81809df3 RFL=00000216 [----AP-] 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=00007fff65f91000 CR3=000000000c506000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000