syzkaller login: [ 30.942313] BUG: Bad rss-counter state mm:000000009ffb02ea type:MM_FILEPAGES val:33 [ 30.944319] BUG: Bad rss-counter state mm:000000009ffb02ea type:MM_ANONPAGES val:22 [ 31.095726] ================================================================== [ 31.096317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.097010] Read of size 8 at addr ffff888016726968 by task sshd/219 [ 31.097567] [ 31.097726] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.098447] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.099113] Call Trace: [ 31.099334] [ 31.099522] dump_stack_lvl+0x91/0xf0 [ 31.099855] print_report+0xcc/0x620 [ 31.100197] ? __virt_addr_valid+0x102/0x340 [ 31.100596] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.101033] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.101462] kasan_report+0xbe/0xf0 [ 31.101790] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.102259] vma_interval_tree_remove+0xc75/0xec0 [ 31.102680] vma_prepare+0xc54/0x11a0 [ 31.103000] __split_vma+0x5af/0x950 [ 31.103314] ? __pfx___split_vma+0x10/0x10 [ 31.103682] ? find_held_lock+0x2c/0x110 [ 31.104056] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.104443] ? lock_is_held_type+0x9f/0x120 [ 31.104834] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.105266] ? mtree_range_walk+0x632/0x900 [ 31.106128] ? mas_walk+0x5c7/0x7c0 [ 31.106485] do_vmi_munmap+0x1f1/0x2b0 [ 31.106906] mmap_region+0x1f9/0x2660 [ 31.107257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.107678] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.108184] ? __pfx_lock_acquire+0x10/0x10 [ 31.108628] ? __pfx_mmap_region+0x10/0x10 [ 31.109006] ? security_mmap_addr+0x7d/0xa0 [ 31.109388] ? get_unmapped_area+0x1f5/0x3f0 [ 31.109831] do_mmap+0x854/0xf00 [ 31.110148] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.110578] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.110988] ksys_mmap_pgoff+0x3af/0x500 [ 31.111357] do_syscall_64+0x3f/0x90 [ 31.111755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.112217] RIP: 0033:0x7f1f52998d82 [ 31.112603] 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 [ 31.114203] RSP: 002b:00007ffcdd07e548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.114866] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f52998d82 [ 31.115458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f51dd2000 [ 31.116052] RBP: 00007f1f51dd2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.116648] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563cdc0a7f70 [ 31.117178] R13: 00007ffcdd07e560 R14: 00007ffcdd07e590 R15: 00007ffcdd07e8f0 [ 31.117808] [ 31.118027] [ 31.118188] Allocated by task 212: [ 31.118551] kasan_save_stack+0x22/0x50 [ 31.118912] kasan_set_track+0x25/0x30 [ 31.119260] __kasan_slab_alloc+0x59/0x70 [ 31.119685] kmem_cache_alloc+0x16b/0x370 [ 31.120065] vm_area_dup+0x20/0x160 [ 31.120393] __split_vma+0x170/0x950 [ 31.120828] split_vma+0xc6/0x110 [ 31.121150] mprotect_fixup+0x8d2/0xb30 [ 31.121574] do_mprotect_pkey+0x87e/0xd40 [ 31.121911] __x64_sys_mprotect+0x78/0xc0 [ 31.122256] do_syscall_64+0x3f/0x90 [ 31.122622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123035] [ 31.123174] Freed by task 13: [ 31.123423] kasan_save_stack+0x22/0x50 [ 31.123794] kasan_set_track+0x25/0x30 [ 31.124110] kasan_save_free_info+0x2b/0x50 [ 31.124452] __kasan_slab_free+0x10a/0x190 [ 31.124854] kmem_cache_free+0x10d/0x4d0 [ 31.125184] rcu_core+0x8c8/0x2860 [ 31.125470] __do_softirq+0x1b7/0x7d4 [ 31.125833] [ 31.125973] Last potentially related work creation: [ 31.126374] kasan_save_stack+0x22/0x50 [ 31.126795] __kasan_record_aux_stack+0x8e/0xa0 [ 31.127200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.127727] remove_vma+0x139/0x170 [ 31.128054] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.128447] do_vmi_munmap+0x1f1/0x2b0 [ 31.128863] __vm_munmap+0x138/0x3a0 [ 31.129203] __x64_sys_munmap+0x59/0x80 [ 31.129635] do_syscall_64+0x3f/0x90 [ 31.129970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.130470] [ 31.130681] The buggy address belongs to the object at ffff888016726910 [ 31.130681] which belongs to the cache vm_area_struct of size 168 [ 31.131786] The buggy address is located 88 bytes inside of [ 31.131786] freed 168-byte region [ffff888016726910, ffff8880167269b8) [ 31.132847] [ 31.132997] The buggy address belongs to the physical page: [ 31.133681] page:000000006501fe27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16726 [ 31.134538] memcg:ffff88800ee2cf01 [ 31.134872] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.135395] page_type: 0xffffffff() [ 31.135806] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.136553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee2cf01 [ 31.137255] page dumped because: kasan: bad access detected [ 31.137818] [ 31.137981] Memory state around the buggy address: [ 31.138423] ffff888016726800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.139101] ffff888016726880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.139755] >ffff888016726900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.140345] ^ [ 31.140947] ffff888016726980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.141614] ffff888016726a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.142149] ================================================================== [ 31.151528] Disabling lock debugging due to kernel taint [ 34.390600] BUG: Bad rss-counter state mm:000000008bc06712 type:MM_FILEPAGES val:33 [ 34.391255] BUG: Bad rss-counter state mm:000000008bc06712 type:MM_ANONPAGES val:22 [ 36.117006] BUG: Bad rss-counter state mm:00000000a4a759c4 type:MM_FILEPAGES val:33 [ 36.117660] BUG: Bad rss-counter state mm:00000000a4a759c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36219' (ECDSA) to the list of known hosts. 2023/06/21 10:07:42 fuzzer started 2023/06/21 10:07:42 dialing manager at localhost:36067 2023/06/21 10:07:42 checking machine... 2023/06/21 10:07:42 checking revisions... [ 37.147495] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:07:42 testing simple program... [ 37.192102] cgroup: Unknown subsys name 'net' [ 37.248197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:42 Registers: info registers vcpu 0 RAX=ffffffff8111a670 RBX=ffffffff852c7cc0 RCX=ffffffff81128d81 RDX=1ffffffff0a58f99 RSI=0000000000000000 RDI=00000000000000b0 RBP=ffffffff85407d68 RSP=ffff88806ce09fe0 R8 =0000000000000001 R9 =ffffed100d9c5059 R10=ffff88806ce282cf R11=ffff88806ce09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8111a67c RFL=00000046 [---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 0000000000000000 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=0000560e2f353380 CR3=000000001a21a000 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=2031343a37303a3031203132206e754a XMM01=5d3036363731312e36332020205b203a XMM02=415f4d4d3a6570797420346339353761 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a37303a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a1f7620 RCX=0000000000000001 RDX=1ffff1100343eec5 RSI=ffffffff846000aa RDI=ffff88801a1f7628 RBP=000000000000000e RSP=ffff88801a1f7538 R8 =0000000000000001 R9 =ffff88801a1f7598 R10=0000000000038001 R11=00000000000b5080 R12=ffff88801a1f7620 R13=0000000000000000 R14=ffff888016763680 R15=ffff88800c5dc180 RIP=ffffffff813ad4d5 RFL=00000283 [--S---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 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=00007f725afff790 CR3=0000000016f04000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000