[ 25.961316] BUG: Bad rss-counter state mm:000000006c9e829f type:MM_FILEPAGES val:33 [ 25.962784] BUG: Bad rss-counter state mm:000000006c9e829f type:MM_ANONPAGES val:22 [ 26.106367] ================================================================== [ 26.107342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.108283] Read of size 8 at addr ffff88800ebe4140 by task sshd/220 [ 26.109065] [ 26.109286] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.110265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.111270] Call Trace: [ 26.111590] [ 26.111880] dump_stack_lvl+0x91/0xf0 [ 26.112405] print_report+0xcc/0x620 [ 26.112897] ? __virt_addr_valid+0x102/0x340 [ 26.113455] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.114093] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.114719] kasan_report+0xbe/0xf0 [ 26.115224] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.115859] vma_interval_tree_remove+0xc75/0xec0 [ 26.116471] vma_prepare+0xc54/0x11a0 [ 26.116957] __split_vma+0x5af/0x950 [ 26.117436] ? __pfx___split_vma+0x10/0x10 [ 26.117976] ? find_held_lock+0x2c/0x110 [ 26.118502] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.119091] ? lock_is_held_type+0x9f/0x120 [ 26.119642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.120259] ? mtree_range_walk+0x632/0x900 [ 26.120820] ? mas_walk+0x5c7/0x7c0 [ 26.121299] do_vmi_munmap+0x1f1/0x2b0 [ 26.121803] mmap_region+0x1f9/0x2660 [ 26.122294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.122815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.123543] ? __pfx_lock_acquire+0x10/0x10 [ 26.124087] ? __pfx_mmap_region+0x10/0x10 [ 26.124628] ? security_mmap_addr+0x7d/0xa0 [ 26.125165] ? get_unmapped_area+0x1f5/0x3f0 [ 26.125719] do_mmap+0x854/0xf00 [ 26.126166] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.126667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.127260] ksys_mmap_pgoff+0x3af/0x500 [ 26.127779] do_syscall_64+0x3f/0x90 [ 26.128266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.128921] RIP: 0033:0x7f6892effd82 [ 26.129383] 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 [ 26.131549] RSP: 002b:00007fffddcf6608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.132466] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6892effd82 [ 26.133338] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6892339000 [ 26.134199] RBP: 00007f6892339000 R08: 0000000000000009 R09: 0000000000001000 [ 26.135068] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4fe305ec0 [ 26.135937] R13: 00007fffddcf6620 R14: 00007fffddcf6650 R15: 00007fffddcf69b0 [ 26.136796] [ 26.137096] [ 26.137319] Allocated by task 209: [ 26.137760] kasan_save_stack+0x22/0x50 [ 26.138277] kasan_set_track+0x25/0x30 [ 26.138779] __kasan_slab_alloc+0x59/0x70 [ 26.139337] kmem_cache_alloc+0x16b/0x370 [ 26.139865] vm_area_dup+0x20/0x160 [ 26.140322] __split_vma+0x170/0x950 [ 26.140802] split_vma+0xc6/0x110 [ 26.141243] mprotect_fixup+0x8d2/0xb30 [ 26.141754] do_mprotect_pkey+0x87e/0xd40 [ 26.142281] __x64_sys_mprotect+0x78/0xc0 [ 26.142809] do_syscall_64+0x3f/0x90 [ 26.143294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.143948] [ 26.144164] Freed by task 205: [ 26.144563] kasan_save_stack+0x22/0x50 [ 26.145081] kasan_set_track+0x25/0x30 [ 26.145584] kasan_save_free_info+0x2b/0x50 [ 26.146118] __kasan_slab_free+0x10a/0x190 [ 26.146653] kmem_cache_free+0x10d/0x4d0 [ 26.147192] rcu_core+0x8c8/0x2860 [ 26.147649] __do_softirq+0x1b7/0x7d4 [ 26.148127] [ 26.148347] Last potentially related work creation: [ 26.148955] kasan_save_stack+0x22/0x50 [ 26.149475] __kasan_record_aux_stack+0x8e/0xa0 [ 26.150061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.150718] remove_vma+0x139/0x170 [ 26.151192] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.151751] do_vmi_munmap+0x1f1/0x2b0 [ 26.152240] __vm_munmap+0x138/0x3a0 [ 26.152724] __x64_sys_munmap+0x59/0x80 [ 26.153229] do_syscall_64+0x3f/0x90 [ 26.153715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.154376] [ 26.154591] Second to last potentially related work creation: [ 26.155290] kasan_save_stack+0x22/0x50 [ 26.155795] __kasan_record_aux_stack+0x8e/0xa0 [ 26.156383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.157036] remove_vma+0x139/0x170 [ 26.157506] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.158078] do_vmi_munmap+0x1f1/0x2b0 [ 26.158567] mmap_region+0x1f9/0x2660 [ 26.159085] do_mmap+0x854/0xf00 [ 26.159530] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.160027] ksys_mmap_pgoff+0x7d/0x500 [ 26.160522] do_syscall_64+0x3f/0x90 [ 26.161006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.161663] [ 26.161884] The buggy address belongs to the object at ffff88800ebe40e8 [ 26.161884] which belongs to the cache vm_area_struct of size 168 [ 26.163385] The buggy address is located 88 bytes inside of [ 26.163385] freed 168-byte region [ffff88800ebe40e8, ffff88800ebe4190) [ 26.164800] [ 26.165019] The buggy address belongs to the physical page: [ 26.165687] page:00000000b5a38886 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebe4 [ 26.166796] memcg:ffff88800cb0ad01 [ 26.167249] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.167896] page_type: 0xffffffff() [ 26.168355] raw: 0100000000000200 ffff88800879fc80 ffffea00003a96c0 dead000000000004 [ 26.169282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb0ad01 [ 26.170196] page dumped because: kasan: bad access detected [ 26.170858] [ 26.171085] Memory state around the buggy address: [ 26.171670] ffff88800ebe4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.172545] ffff88800ebe4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 26.173416] >ffff88800ebe4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.174280] ^ [ 26.174931] ffff88800ebe4180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 26.175801] ffff88800ebe4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 26.176662] ================================================================== [ 26.177641] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.081687] BUG: Bad rss-counter state mm:00000000d7fcfbfd type:MM_FILEPAGES val:33 [ 28.082882] BUG: Bad rss-counter state mm:00000000d7fcfbfd type:MM_ANONPAGES val:22 [ 28.505784] BUG: Bad rss-counter state mm:0000000001e5f137 type:MM_FILEPAGES val:33 [ 28.506945] BUG: Bad rss-counter state mm:0000000001e5f137 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47683' (ECDSA) to the list of known hosts. 2023/06/19 18:36:26 fuzzer started 2023/06/19 18:36:26 dialing manager at localhost:44161 2023/06/19 18:36:26 checking machine... 2023/06/19 18:36:26 checking revisions... [ 29.181756] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:36:27 testing simple program... [ 29.232128] cgroup: Unknown subsys name 'net' [ 29.269694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:36:24 Registers: info registers vcpu 0 RAX=ffffed10028f6ead RBX=ffff88806ce361a0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8182754a RDI=ffffffff8560b640 RBP=1ffff110028f6ead RSP=ffff8880147b7558 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff8182754a R14=ffff88800f069080 R15=0000000000000001 RIP=ffffffff812d8659 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 00007f1ac6c55900 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=00007f645b3ad650 CR3=000000000c618000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=6449b04c2ca7366500000000000ae988 XMM05=e6e55fa353afce0d0000000000136400 XMM06=4fc425976fe66e150000000000134e30 XMM07=fb795ef6d65770560000000000123598 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fffa39328c8 CR3=000000000e8c4000 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=2036323a36333a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000