syzkaller login: [ 28.736230] BUG: Bad rss-counter state mm:000000003e80416a type:MM_FILEPAGES val:33 [ 28.737676] BUG: Bad rss-counter state mm:000000003e80416a type:MM_ANONPAGES val:22 [ 28.901588] ================================================================== [ 28.902635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.903732] Read of size 8 at addr ffff88800ec186b0 by task sshd/220 [ 28.904764] [ 28.905019] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.906014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.907147] Call Trace: [ 28.907544] [ 28.907874] dump_stack_lvl+0x91/0xf0 [ 28.908370] print_report+0xcc/0x620 [ 28.908839] ? __virt_addr_valid+0x102/0x340 [ 28.909375] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909978] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.910579] kasan_report+0xbe/0xf0 [ 28.911044] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.911772] vma_interval_tree_remove+0xc75/0xec0 [ 28.912382] vma_prepare+0xc54/0x11a0 [ 28.912858] __split_vma+0x5af/0x950 [ 28.913333] ? __pfx___split_vma+0x10/0x10 [ 28.913862] ? find_held_lock+0x2c/0x110 [ 28.914384] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.914953] ? lock_is_held_type+0x9f/0x120 [ 28.915502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.916114] ? mtree_range_walk+0x632/0x900 [ 28.916670] ? mas_walk+0x5c7/0x7c0 [ 28.917155] do_vmi_munmap+0x1f1/0x2b0 [ 28.917651] mmap_region+0x1f9/0x2660 [ 28.918145] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.918665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.919404] ? __pfx_lock_acquire+0x10/0x10 [ 28.919949] ? __pfx_mmap_region+0x10/0x10 [ 28.920480] ? security_mmap_addr+0x7d/0xa0 [ 28.921027] ? get_unmapped_area+0x1f5/0x3f0 [ 28.921580] do_mmap+0x854/0xf00 [ 28.922017] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.922516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.923081] ksys_mmap_pgoff+0x3af/0x500 [ 28.923601] do_syscall_64+0x3f/0x90 [ 28.924080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.924729] RIP: 0033:0x7ffa713f3d82 [ 28.925195] 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 [ 28.927341] RSP: 002b:00007ffdef0a31f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.928258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa713f3d82 [ 28.929108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa7082d000 [ 28.929967] RBP: 00007ffa7082d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.930821] R10: 0000000000000812 R11: 0000000000000206 R12: 000055668ef34f70 [ 28.931689] R13: 00007ffdef0a3210 R14: 00007ffdef0a3240 R15: 00007ffdef0a35a0 [ 28.932552] [ 28.932846] [ 28.933065] Allocated by task 213: [ 28.933497] kasan_save_stack+0x22/0x50 [ 28.934012] kasan_set_track+0x25/0x30 [ 28.934512] __kasan_slab_alloc+0x59/0x70 [ 28.935045] kmem_cache_alloc+0x16b/0x370 [ 28.935570] vm_area_dup+0x20/0x160 [ 28.936034] __split_vma+0x170/0x950 [ 28.936511] split_vma+0xc6/0x110 [ 28.936955] mprotect_fixup+0x8d2/0xb30 [ 28.937476] do_mprotect_pkey+0x87e/0xd40 [ 28.938003] __x64_sys_mprotect+0x78/0xc0 [ 28.938527] do_syscall_64+0x3f/0x90 [ 28.939020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.939691] [ 28.939910] Freed by task 213: [ 28.940314] kasan_save_stack+0x22/0x50 [ 28.940821] kasan_set_track+0x25/0x30 [ 28.941322] kasan_save_free_info+0x2b/0x50 [ 28.941854] __kasan_slab_free+0x10a/0x190 [ 28.942392] kmem_cache_free+0x10d/0x4d0 [ 28.942911] rcu_core+0x8c8/0x2860 [ 28.943373] __do_softirq+0x1b7/0x7d4 [ 28.943852] [ 28.944075] Last potentially related work creation: [ 28.944670] kasan_save_stack+0x22/0x50 [ 28.945180] __kasan_record_aux_stack+0x8e/0xa0 [ 28.945906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.946552] remove_vma+0x139/0x170 [ 28.947015] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.947597] do_vmi_munmap+0x1f1/0x2b0 [ 28.948091] __vm_munmap+0x138/0x3a0 [ 28.948560] __x64_sys_munmap+0x59/0x80 [ 28.949066] do_syscall_64+0x3f/0x90 [ 28.949544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.950193] [ 28.950412] The buggy address belongs to the object at ffff88800ec18658 [ 28.950412] which belongs to the cache vm_area_struct of size 168 [ 28.951898] The buggy address is located 88 bytes inside of [ 28.951898] freed 168-byte region [ffff88800ec18658, ffff88800ec18700) [ 28.953336] [ 28.953556] The buggy address belongs to the physical page: [ 28.954218] page:00000000373e0ec6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec18 [ 28.955360] memcg:ffff88800e4a8f01 [ 28.955801] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.956572] page_type: 0xffffffff() [ 28.957013] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.957909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4a8f01 [ 28.958795] page dumped because: kasan: bad access detected [ 28.959449] [ 28.959658] Memory state around the buggy address: [ 28.960227] ffff88800ec18580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.961069] ffff88800ec18600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.961913] >ffff88800ec18680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.962747] ^ [ 28.963338] ffff88800ec18700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.964186] ffff88800ec18780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.965023] ================================================================== [ 28.965928] Disabling lock debugging due to kernel taint [ 31.168091] BUG: Bad rss-counter state mm:000000003b8197bf type:MM_FILEPAGES val:33 [ 31.168977] BUG: Bad rss-counter state mm:000000003b8197bf type:MM_ANONPAGES val:22 [ 31.699226] BUG: Bad rss-counter state mm:00000000aedbb0fe type:MM_FILEPAGES val:33 [ 31.700476] BUG: Bad rss-counter state mm:00000000aedbb0fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31299' (ECDSA) to the list of known hosts. 2023/06/21 03:21:03 fuzzer started 2023/06/21 03:21:04 dialing manager at localhost:36067 2023/06/21 03:21:04 checking machine... 2023/06/21 03:21:04 checking revisions... [ 32.330540] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:21:04 testing simple program... [ 32.381252] cgroup: Unknown subsys name 'net' [ 32.418883] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:21:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea00006ae900 RCX=ffffffff81711f94 RDX=ffff888016800000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff8880181d7d90 RSP=ffff8880181d7c00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff8880197f12b8 R14=ffffea0000628988 R15=0000000000000000 RIP=ffffffff81711f97 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe5639e5900 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=00007fe563f9c618 CR3=000000001ca9a000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f188f54bf00 CR3=000000000eaa8000 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=4ee9793f2fb9ce85ec4db49a56e129ae XMM02=000000000011a048eff9b2d0a8fce9cb XMM03=000000000011a1182c67c8bc2e329bc3 XMM04=8bcf9ca9b973ba8300000000000ae988 XMM05=19e9129bd510f2350000000000131800 XMM06=5514798393dd07410000000000130668 XMM07=e042d86d42eb936e0000000000121c50 XMM08=979b3ef7445c7842000000000011a118 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000