syzkaller login: [ 32.719804] BUG: Bad rss-counter state mm:0000000008f2c784 type:MM_FILEPAGES val:33 [ 32.721545] BUG: Bad rss-counter state mm:0000000008f2c784 type:MM_ANONPAGES val:22 [ 32.890691] ================================================================== [ 32.891557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.892435] Read of size 8 at addr ffff888015f34310 by task sshd/220 [ 32.893164] [ 32.893373] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.894305] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.895227] Call Trace: [ 32.895529] [ 32.895802] dump_stack_lvl+0x91/0xf0 [ 32.896270] print_report+0xcc/0x620 [ 32.896755] ? __virt_addr_valid+0x102/0x340 [ 32.897278] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.897857] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.898444] kasan_report+0xbe/0xf0 [ 32.898897] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.899486] vma_interval_tree_remove+0xc75/0xec0 [ 32.900052] vma_prepare+0xc54/0x11a0 [ 32.900509] __split_vma+0x5af/0x950 [ 32.900973] ? __pfx___split_vma+0x10/0x10 [ 32.901475] ? find_held_lock+0x2c/0x110 [ 32.901968] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.902527] ? lock_is_held_type+0x9f/0x120 [ 32.903071] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.903682] ? mtree_range_walk+0x632/0x900 [ 32.904240] ? mas_walk+0x5c7/0x7c0 [ 32.904729] do_vmi_munmap+0x1f1/0x2b0 [ 32.905221] mmap_region+0x1f9/0x2660 [ 32.905704] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.906217] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.906931] ? __pfx_lock_acquire+0x10/0x10 [ 32.907463] ? __pfx_mmap_region+0x10/0x10 [ 32.908002] ? security_mmap_addr+0x7d/0xa0 [ 32.908532] ? get_unmapped_area+0x1f5/0x3f0 [ 32.909093] do_mmap+0x854/0xf00 [ 32.909526] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.910023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.910588] ksys_mmap_pgoff+0x3af/0x500 [ 32.911094] do_syscall_64+0x3f/0x90 [ 32.911567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.912218] RIP: 0033:0x7fc3f67a9d82 [ 32.912697] 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 [ 32.914826] RSP: 002b:00007fffd2a1e818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.915735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3f67a9d82 [ 32.916598] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3f5be3000 [ 32.917453] RBP: 00007fc3f5be3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.918295] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de1c846ec0 [ 32.919141] R13: 00007fffd2a1e830 R14: 00007fffd2a1e860 R15: 00007fffd2a1ebc0 [ 32.920007] [ 32.920298] [ 32.920512] Allocated by task 213: [ 32.920954] kasan_save_stack+0x22/0x50 [ 32.921461] kasan_set_track+0x25/0x30 [ 32.921954] __kasan_slab_alloc+0x59/0x70 [ 32.922481] kmem_cache_alloc+0x16b/0x370 [ 32.923005] vm_area_dup+0x20/0x160 [ 32.923457] __split_vma+0x170/0x950 [ 32.923922] split_vma+0xc6/0x110 [ 32.924363] mprotect_fixup+0x8d2/0xb30 [ 32.924870] do_mprotect_pkey+0x87e/0xd40 [ 32.925393] __x64_sys_mprotect+0x78/0xc0 [ 32.925924] do_syscall_64+0x3f/0x90 [ 32.926395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.927035] [ 32.927251] Freed by task 213: [ 32.927650] kasan_save_stack+0x22/0x50 [ 32.928161] kasan_set_track+0x25/0x30 [ 32.928665] kasan_save_free_info+0x2b/0x50 [ 32.929194] __kasan_slab_free+0x10a/0x190 [ 32.929727] kmem_cache_free+0x10d/0x4d0 [ 32.930234] rcu_core+0x8c8/0x2860 [ 32.930678] __do_softirq+0x1b7/0x7d4 [ 32.931158] [ 32.931375] Last potentially related work creation: [ 32.931965] kasan_save_stack+0x22/0x50 [ 32.932467] __kasan_record_aux_stack+0x8e/0xa0 [ 32.933069] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.933716] remove_vma+0x139/0x170 [ 32.934172] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.934728] do_vmi_munmap+0x1f1/0x2b0 [ 32.935218] __vm_munmap+0x138/0x3a0 [ 32.935682] __x64_sys_munmap+0x59/0x80 [ 32.936186] do_syscall_64+0x3f/0x90 [ 32.936660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.937307] [ 32.937521] Second to last potentially related work creation: [ 32.938204] kasan_save_stack+0x22/0x50 [ 32.938708] __kasan_record_aux_stack+0x8e/0xa0 [ 32.939280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.939922] remove_vma+0x139/0x170 [ 32.940377] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.940963] do_vmi_munmap+0x1f1/0x2b0 [ 32.941449] mmap_region+0x1f9/0x2660 [ 32.941924] do_mmap+0x854/0xf00 [ 32.942350] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.942839] ksys_mmap_pgoff+0x3af/0x500 [ 32.943346] do_syscall_64+0x3f/0x90 [ 32.943812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.944450] [ 32.944675] The buggy address belongs to the object at ffff888015f342b8 [ 32.944675] which belongs to the cache vm_area_struct of size 168 [ 32.946158] The buggy address is located 88 bytes inside of [ 32.946158] freed 168-byte region [ffff888015f342b8, ffff888015f34360) [ 32.947565] [ 32.947780] The buggy address belongs to the physical page: [ 32.948437] page:00000000f6146714 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f34 [ 32.949560] memcg:ffff88800f14cc01 [ 32.949983] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.950695] page_type: 0xffffffff() [ 32.951147] raw: 0100000000000200 ffff88800879fc80 ffffea00003c7440 0000000000000007 [ 32.952059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f14cc01 [ 32.952980] page dumped because: kasan: bad access detected [ 32.953649] [ 32.953863] Memory state around the buggy address: [ 32.954450] ffff888015f34200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.955309] ffff888015f34280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.956176] >ffff888015f34300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.957048] ^ [ 32.957513] ffff888015f34380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.958382] ffff888015f34400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.959233] ================================================================== [ 32.960565] Disabling lock debugging due to kernel taint [ 34.743204] BUG: Bad rss-counter state mm:000000001d08d7ba type:MM_FILEPAGES val:33 [ 34.743943] BUG: Bad rss-counter state mm:000000001d08d7ba type:MM_ANONPAGES val:22 [ 35.161039] BUG: Bad rss-counter state mm:00000000c9085905 type:MM_FILEPAGES val:33 [ 35.162861] BUG: Bad rss-counter state mm:00000000c9085905 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38385' (ECDSA) to the list of known hosts. 2023/06/19 11:05:15 fuzzer started 2023/06/19 11:05:15 dialing manager at localhost:44161 2023/06/19 11:05:15 checking machine... 2023/06/19 11:05:15 checking revisions... [ 35.900108] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:05:15 testing simple program... [ 35.953359] cgroup: Unknown subsys name 'net' [ 36.014357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:05:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed10033dae85 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888019ed7418 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000009ec000009ec R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8fe1 RFL=00000282 [--S----] 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 00007fd70e2f1900 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=00007fd70e8a8618 CR3=00000000168a4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007f08e5d191c0 CR3=0000000008eea000 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=a84e2d35d05581a06849ea62b6022e41 XMM02=2c67c8bc2e329bc3000000000011d448 XMM03=fb795ef6d657705600000000001248e8 XMM04=ae65949229bc9cd600000000000ae988 XMM05=19e9129bd510f2350000000000135728 XMM06=b2709c4c044166d80000000000134590 XMM07=e042d86d42eb936e0000000000124b68 XMM08=acde4aefa9f6a6ff000000000011d4a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000