syzkaller login: [ 30.551760] BUG: Bad rss-counter state mm:00000000dfce4b0b type:MM_FILEPAGES val:33 [ 30.552741] BUG: Bad rss-counter state mm:00000000dfce4b0b type:MM_ANONPAGES val:22 [ 30.714456] ================================================================== [ 30.715367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.716301] Read of size 8 at addr ffff888015876798 by task sshd/220 [ 30.717064] [ 30.717279] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.718231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.719205] Call Trace: [ 30.719552] [ 30.719857] dump_stack_lvl+0x91/0xf0 [ 30.720356] print_report+0xcc/0x620 [ 30.720839] ? __virt_addr_valid+0x102/0x340 [ 30.721391] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722018] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722634] kasan_report+0xbe/0xf0 [ 30.723112] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.723747] vma_interval_tree_remove+0xc75/0xec0 [ 30.724357] vma_prepare+0xc54/0x11a0 [ 30.724844] __split_vma+0x5af/0x950 [ 30.725318] ? __pfx___split_vma+0x10/0x10 [ 30.725847] ? find_held_lock+0x2c/0x110 [ 30.726371] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.726931] ? lock_is_held_type+0x9f/0x120 [ 30.727483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.728084] ? mtree_range_walk+0x632/0x900 [ 30.728634] ? mas_walk+0x5c7/0x7c0 [ 30.729105] do_vmi_munmap+0x1f1/0x2b0 [ 30.729597] mmap_region+0x1f9/0x2660 [ 30.730088] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.730594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.731332] ? __pfx_lock_acquire+0x10/0x10 [ 30.731874] ? __pfx_mmap_region+0x10/0x10 [ 30.732404] ? security_mmap_addr+0x7d/0xa0 [ 30.732934] ? get_unmapped_area+0x1f5/0x3f0 [ 30.733480] do_mmap+0x854/0xf00 [ 30.733921] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.734417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.734983] ksys_mmap_pgoff+0x3af/0x500 [ 30.735501] do_syscall_64+0x3f/0x90 [ 30.735989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.736638] RIP: 0033:0x7f3c0dd8ed82 [ 30.737094] 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 [ 30.739231] RSP: 002b:00007ffe352a1828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.740135] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c0dd8ed82 [ 30.740981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c0d1c8000 [ 30.741826] RBP: 00007f3c0d1c8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.742666] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f030f8d90 [ 30.743523] R13: 00007ffe352a1840 R14: 00007ffe352a1870 R15: 00007ffe352a1bd0 [ 30.744380] [ 30.744669] [ 30.744884] Allocated by task 213: [ 30.745314] kasan_save_stack+0x22/0x50 [ 30.745816] kasan_set_track+0x25/0x30 [ 30.746305] __kasan_slab_alloc+0x59/0x70 [ 30.746830] kmem_cache_alloc+0x16b/0x370 [ 30.747356] vm_area_dup+0x20/0x160 [ 30.747814] __split_vma+0x170/0x950 [ 30.748281] split_vma+0xc6/0x110 [ 30.748718] mprotect_fixup+0x8d2/0xb30 [ 30.749230] do_mprotect_pkey+0x87e/0xd40 [ 30.749749] __x64_sys_mprotect+0x78/0xc0 [ 30.750269] do_syscall_64+0x3f/0x90 [ 30.750748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.751406] [ 30.751620] Freed by task 19: [ 30.752004] kasan_save_stack+0x22/0x50 [ 30.752508] kasan_set_track+0x25/0x30 [ 30.753008] kasan_save_free_info+0x2b/0x50 [ 30.753544] __kasan_slab_free+0x10a/0x190 [ 30.754074] kmem_cache_free+0x10d/0x4d0 [ 30.754582] rcu_core+0x8c8/0x2860 [ 30.755025] __do_softirq+0x1b7/0x7d4 [ 30.755506] [ 30.755722] Last potentially related work creation: [ 30.756312] kasan_save_stack+0x22/0x50 [ 30.756813] __kasan_record_aux_stack+0x8e/0xa0 [ 30.757389] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.758042] remove_vma+0x139/0x170 [ 30.758497] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.759068] do_vmi_munmap+0x1f1/0x2b0 [ 30.759570] __vm_munmap+0x138/0x3a0 [ 30.760043] __x64_sys_munmap+0x59/0x80 [ 30.760540] do_syscall_64+0x3f/0x90 [ 30.761025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761683] [ 30.761899] The buggy address belongs to the object at ffff888015876740 [ 30.761899] which belongs to the cache vm_area_struct of size 168 [ 30.763402] The buggy address is located 88 bytes inside of [ 30.763402] freed 168-byte region [ffff888015876740, ffff8880158767e8) [ 30.764823] [ 30.765038] The buggy address belongs to the physical page: [ 30.765698] page:00000000f1cc9bcf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15876 [ 30.766799] memcg:ffff888016787801 [ 30.767240] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.767895] page_type: 0xffffffff() [ 30.768349] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.769267] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016787801 [ 30.770178] page dumped because: kasan: bad access detected [ 30.770834] [ 30.771052] Memory state around the buggy address: [ 30.771644] ffff888015876680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.772508] ffff888015876700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.773375] >ffff888015876780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.774238] ^ [ 30.774738] ffff888015876800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.775601] ffff888015876880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.776463] ================================================================== [ 30.777433] Disabling lock debugging due to kernel taint [ 32.508286] BUG: Bad rss-counter state mm:0000000081484bee type:MM_FILEPAGES val:33 [ 32.508877] BUG: Bad rss-counter state mm:0000000081484bee type:MM_ANONPAGES val:22 [ 32.926840] BUG: Bad rss-counter state mm:000000003f14e63f type:MM_FILEPAGES val:33 [ 32.928494] BUG: Bad rss-counter state mm:000000003f14e63f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12102' (ECDSA) to the list of known hosts. 2023/06/20 17:13:50 fuzzer started 2023/06/20 17:13:50 dialing manager at localhost:36067 2023/06/20 17:13:50 checking machine... 2023/06/20 17:13:50 checking revisions... [ 33.662012] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:13:50 testing simple program... [ 33.702261] cgroup: Unknown subsys name 'net' [ 33.763140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:13:50 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000200 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88801425fc58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea00003a5300 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff815343bd RFL=00000002 [-------] 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 00007fcdceb6c900 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=000055ac4c311768 CR3=000000000b39a000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880087e7400 RCX=00000000fffffbf8 RDX=0000000000000001 RSI=ffff88807ffdc000 RDI=ffff888009892780 RBP=ffff8880181ef910 RSP=ffff8880181ef8e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f140 R13=ffffea000021f900 R14=ffffffff8367562f R15=ffff888009892780 RIP=ffffffff8180b53c RFL=00000256 [---ZAP-] 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 00007f0e9893a700 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=00007ffe084c7588 CR3=0000000019e92000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38333637332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383336 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000