syzkaller login: [ 61.933876] BUG: Bad rss-counter state mm:00000000488fb323 type:MM_FILEPAGES val:33 [ 61.935076] BUG: Bad rss-counter state mm:00000000488fb323 type:MM_ANONPAGES val:22 [ 62.082029] ================================================================== [ 62.083129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.084280] Read of size 8 at addr ffff88800e025968 by task sshd/222 [ 62.085235] [ 62.085458] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 62.086477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.087477] Call Trace: [ 62.087805] [ 62.088103] dump_stack_lvl+0x91/0xf0 [ 62.088589] print_report+0xcc/0x620 [ 62.089090] ? __virt_addr_valid+0x102/0x340 [ 62.089641] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.090271] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.090895] kasan_report+0xbe/0xf0 [ 62.091352] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.092015] vma_interval_tree_remove+0xc75/0xec0 [ 62.092603] vma_prepare+0xc54/0x11a0 [ 62.093089] __split_vma+0x5af/0x950 [ 62.093583] ? __pfx___split_vma+0x10/0x10 [ 62.094133] ? find_held_lock+0x2c/0x110 [ 62.094663] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.095248] ? lock_is_held_type+0x9f/0x120 [ 62.095807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.096578] ? mtree_range_walk+0x632/0x900 [ 62.097282] ? mas_walk+0x5c7/0x7c0 [ 62.097896] do_vmi_munmap+0x1f1/0x2b0 [ 62.098482] mmap_region+0x1f9/0x2660 [ 62.099069] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.099673] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.100538] ? __pfx_lock_acquire+0x10/0x10 [ 62.101176] ? __pfx_mmap_region+0x10/0x10 [ 62.101813] ? security_mmap_addr+0x7d/0xa0 [ 62.102505] ? get_unmapped_area+0x1f5/0x3f0 [ 62.103154] do_mmap+0x854/0xf00 [ 62.103607] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.104153] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.104706] ksys_mmap_pgoff+0x3af/0x500 [ 62.105337] do_syscall_64+0x3f/0x90 [ 62.105842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.106500] RIP: 0033:0x7fbb7c428d82 [ 62.106980] 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 [ 62.109141] RSP: 002b:00007ffcb06888e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.110081] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb7c428d82 [ 62.110925] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb7b862000 [ 62.111769] RBP: 00007fbb7b862000 R08: 0000000000000009 R09: 0000000000001000 [ 62.112614] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637007acf70 [ 62.113498] R13: 00007ffcb0688900 R14: 00007ffcb0688930 R15: 00007ffcb0688c90 [ 62.114358] [ 62.114642] [ 62.114868] Allocated by task 214: [ 62.115315] kasan_save_stack+0x22/0x50 [ 62.115871] kasan_set_track+0x25/0x30 [ 62.116369] __kasan_slab_alloc+0x59/0x70 [ 62.116900] kmem_cache_alloc+0x16b/0x370 [ 62.117409] vm_area_dup+0x20/0x160 [ 62.117890] __split_vma+0x170/0x950 [ 62.118383] split_vma+0xc6/0x110 [ 62.118861] mprotect_fixup+0x8d2/0xb30 [ 62.119366] do_mprotect_pkey+0x87e/0xd40 [ 62.119903] __x64_sys_mprotect+0x78/0xc0 [ 62.120429] do_syscall_64+0x3f/0x90 [ 62.120909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.121550] [ 62.121778] Freed by task 214: [ 62.122173] kasan_save_stack+0x22/0x50 [ 62.122678] kasan_set_track+0x25/0x30 [ 62.123201] kasan_save_free_info+0x2b/0x50 [ 62.123756] __kasan_slab_free+0x10a/0x190 [ 62.124341] kmem_cache_free+0x10d/0x4d0 [ 62.124880] rcu_core+0x8c8/0x2860 [ 62.125344] __do_softirq+0x1b7/0x7d4 [ 62.125827] [ 62.126043] Last potentially related work creation: [ 62.126680] kasan_save_stack+0x22/0x50 [ 62.127195] __kasan_record_aux_stack+0x8e/0xa0 [ 62.127778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.128468] remove_vma+0x139/0x170 [ 62.128950] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.129524] do_vmi_munmap+0x1f1/0x2b0 [ 62.130044] __vm_munmap+0x138/0x3a0 [ 62.130528] __x64_sys_munmap+0x59/0x80 [ 62.131064] do_syscall_64+0x3f/0x90 [ 62.131560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.132274] [ 62.132500] Second to last potentially related work creation: [ 62.133215] kasan_save_stack+0x22/0x50 [ 62.133749] __kasan_record_aux_stack+0x8e/0xa0 [ 62.134326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.134987] remove_vma+0x139/0x170 [ 62.135459] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.136079] do_vmi_munmap+0x1f1/0x2b0 [ 62.136585] mmap_region+0x1f9/0x2660 [ 62.137086] do_mmap+0x854/0xf00 [ 62.137539] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.138056] ksys_mmap_pgoff+0x3af/0x500 [ 62.138573] do_syscall_64+0x3f/0x90 [ 62.139078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.139752] [ 62.139998] The buggy address belongs to the object at ffff88800e025910 [ 62.139998] which belongs to the cache vm_area_struct of size 168 [ 62.141549] The buggy address is located 88 bytes inside of [ 62.141549] freed 168-byte region [ffff88800e025910, ffff88800e0259b8) [ 62.142996] [ 62.143208] The buggy address belongs to the physical page: [ 62.143895] page:00000000540cdcc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe025 [ 62.144997] memcg:ffff88800df0dc01 [ 62.145437] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.146126] page_type: 0xffffffff() [ 62.146597] raw: 0100000000000200 ffff88800879fc80 ffffea00002543c0 dead000000000004 [ 62.147563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df0dc01 [ 62.148557] page dumped because: kasan: bad access detected [ 62.149259] [ 62.149483] Memory state around the buggy address: [ 62.150093] ffff88800e025800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 62.150983] ffff88800e025880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 62.151869] >ffff88800e025900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.152755] ^ [ 62.153573] ffff88800e025980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 62.154453] ffff88800e025a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.155333] ================================================================== [ 62.156322] Disabling lock debugging due to kernel taint [ 64.619791] BUG: Bad rss-counter state mm:00000000cd8a8ebc type:MM_FILEPAGES val:33 [ 64.620815] BUG: Bad rss-counter state mm:00000000cd8a8ebc type:MM_ANONPAGES val:22 [ 65.191351] BUG: Bad rss-counter state mm:0000000079472b04 type:MM_FILEPAGES val:33 [ 65.192534] BUG: Bad rss-counter state mm:0000000079472b04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34807' (ECDSA) to the list of known hosts. 2023/06/19 13:34:29 fuzzer started 2023/06/19 13:34:29 dialing manager at localhost:44161 2023/06/19 13:34:29 checking machine... 2023/06/19 13:34:29 checking revisions... [ 65.829423] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:34:29 testing simple program... [ 65.874616] cgroup: Unknown subsys name 'net' [ 65.915093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f0e1b40 RSI=ffffffff8386cf77 RDI=0000000000000007 RBP=ffff88800f63a180 RSP=ffff88801658f700 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88801b82b6b8 R11=00000000000b6996 R12=ffff888008f20000 R13=ffff88800f63a100 R14=dffffc0000000000 R15=ffff88801b82b6b8 RIP=ffffffff814c081b 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 00007f8bebfc5900 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=00007f8bec57c618 CR3=000000000ef1a000 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=00007fb691c358a0 CR3=000000000c4c2000 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=171d0fa2b72797b4cb4e108eb718ac57 XMM02=2c67c8bc2e329bc30000000000121fb0 XMM03=fb795ef6d65770560000000000128d90 XMM04=a50c62af21e8427800000000000ae988 XMM05=59d5b690e0af863b000000000013a2c8 XMM06=6ec64034f73b3f550000000000139130 XMM07=e042d86d42eb936e0000000000129010 XMM08=0bf26225894676af0000000000122010 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000