syzkaller login: [ 66.035385] BUG: Bad rss-counter state mm:0000000034851346 type:MM_FILEPAGES val:33 [ 66.036840] BUG: Bad rss-counter state mm:0000000034851346 type:MM_ANONPAGES val:22 [ 66.196455] ================================================================== [ 66.197516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.198442] Read of size 8 at addr ffff88800eaf26b0 by task sshd/220 [ 66.199301] [ 66.199521] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.200387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.201377] Call Trace: [ 66.201693] [ 66.201986] dump_stack_lvl+0x91/0xf0 [ 66.202482] print_report+0xcc/0x620 [ 66.202957] ? __virt_addr_valid+0x102/0x340 [ 66.203503] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.204137] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.204752] kasan_report+0xbe/0xf0 [ 66.205232] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.205860] vma_interval_tree_remove+0xc75/0xec0 [ 66.206463] vma_prepare+0xc54/0x11a0 [ 66.206941] __split_vma+0x5af/0x950 [ 66.207412] ? __pfx___split_vma+0x10/0x10 [ 66.207938] ? find_held_lock+0x2c/0x110 [ 66.208459] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.209037] ? lock_is_held_type+0x9f/0x120 [ 66.209582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.210187] ? mtree_range_walk+0x632/0x900 [ 66.210742] ? mas_walk+0x5c7/0x7c0 [ 66.211218] do_vmi_munmap+0x1f1/0x2b0 [ 66.211713] mmap_region+0x1f9/0x2660 [ 66.212191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.212707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.213442] ? __pfx_lock_acquire+0x10/0x10 [ 66.213971] ? __pfx_mmap_region+0x10/0x10 [ 66.214499] ? security_mmap_addr+0x7d/0xa0 [ 66.215032] ? get_unmapped_area+0x1f5/0x3f0 [ 66.215588] do_mmap+0x854/0xf00 [ 66.216027] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.216519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.217098] ksys_mmap_pgoff+0x3af/0x500 [ 66.217609] do_syscall_64+0x3f/0x90 [ 66.218089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.218737] RIP: 0033:0x7fe97f3ebd82 [ 66.219198] 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 [ 66.221332] RSP: 002b:00007ffddfe854a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.222233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe97f3ebd82 [ 66.223077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe97e825000 [ 66.223918] RBP: 00007fe97e825000 R08: 0000000000000009 R09: 0000000000001000 [ 66.224759] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dbe5faaec0 [ 66.225620] R13: 00007ffddfe854c0 R14: 00007ffddfe854f0 R15: 00007ffddfe85850 [ 66.226478] [ 66.226773] [ 66.226987] Allocated by task 213: [ 66.227413] kasan_save_stack+0x22/0x50 [ 66.227917] kasan_set_track+0x25/0x30 [ 66.228409] __kasan_slab_alloc+0x59/0x70 [ 66.228940] kmem_cache_alloc+0x16b/0x370 [ 66.229462] vm_area_dup+0x20/0x160 [ 66.229916] __split_vma+0x170/0x950 [ 66.230382] split_vma+0xc6/0x110 [ 66.230820] mprotect_fixup+0x8d2/0xb30 [ 66.231316] do_mprotect_pkey+0x87e/0xd40 [ 66.231846] __x64_sys_mprotect+0x78/0xc0 [ 66.232362] do_syscall_64+0x3f/0x90 [ 66.232834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.233492] [ 66.233705] Freed by task 213: [ 66.234098] kasan_save_stack+0x22/0x50 [ 66.234600] kasan_set_track+0x25/0x30 [ 66.235088] kasan_save_free_info+0x2b/0x50 [ 66.235618] __kasan_slab_free+0x10a/0x190 [ 66.236150] kmem_cache_free+0x10d/0x4d0 [ 66.236655] rcu_core+0x8c8/0x2860 [ 66.237107] __do_softirq+0x1b7/0x7d4 [ 66.237580] [ 66.237795] Last potentially related work creation: [ 66.238382] kasan_save_stack+0x22/0x50 [ 66.238885] __kasan_record_aux_stack+0x8e/0xa0 [ 66.239459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.240102] remove_vma+0x139/0x170 [ 66.240554] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.241117] do_vmi_munmap+0x1f1/0x2b0 [ 66.241605] __vm_munmap+0x138/0x3a0 [ 66.242068] __x64_sys_munmap+0x59/0x80 [ 66.242567] do_syscall_64+0x3f/0x90 [ 66.243044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.243683] [ 66.243897] The buggy address belongs to the object at ffff88800eaf2658 [ 66.243897] which belongs to the cache vm_area_struct of size 168 [ 66.245373] The buggy address is located 88 bytes inside of [ 66.245373] freed 168-byte region [ffff88800eaf2658, ffff88800eaf2700) [ 66.246783] [ 66.246998] The buggy address belongs to the physical page: [ 66.247668] page:00000000ab7a9d67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaf2 [ 66.248753] memcg:ffff8880164eab01 [ 66.249186] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.249834] page_type: 0xffffffff() [ 66.250282] raw: 0100000000000200 ffff88800879fc80 ffffea00003c2300 dead000000000008 [ 66.251199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164eab01 [ 66.252099] page dumped because: kasan: bad access detected [ 66.252754] [ 66.252966] Memory state around the buggy address: [ 66.253566] ffff88800eaf2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.254416] ffff88800eaf2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 66.255280] >ffff88800eaf2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.256124] ^ [ 66.256707] ffff88800eaf2700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 66.257573] ffff88800eaf2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 66.258425] ================================================================== [ 66.259455] Disabling lock debugging due to kernel taint [ 69.063720] BUG: Bad rss-counter state mm:000000003cc890db type:MM_FILEPAGES val:33 [ 69.064686] BUG: Bad rss-counter state mm:000000003cc890db type:MM_ANONPAGES val:22 [ 69.609376] BUG: Bad rss-counter state mm:00000000d4542663 type:MM_FILEPAGES val:33 [ 69.610484] BUG: Bad rss-counter state mm:00000000d4542663 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24599' (ECDSA) to the list of known hosts. 2023/06/19 18:25:37 fuzzer started 2023/06/19 18:25:37 dialing manager at localhost:44161 2023/06/19 18:25:37 checking machine... 2023/06/19 18:25:37 checking revisions... [ 70.230312] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:25:37 testing simple program... [ 70.279036] cgroup: Unknown subsys name 'net' [ 70.347485] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:25:31 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8180c8d9 RDX=0000000000000005 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca8c RSP=ffff88801654f920 R8 =ffffffff861375e0 R9 =ffff88801654fa18 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfcaa0 R13=ffffffff85dfca8c R14=ffffffff85dfca8c R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000213 [----A-C] 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 00007ff50aa82900 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=00007ff50b03a0b0 CR3=000000000e890000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007ffd41c29a68 CR3=0000000006a44000 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=2036333a35323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a35323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000