syzkaller login: [ 53.682945] BUG: Bad rss-counter state mm:000000008b93a2a2 type:MM_FILEPAGES val:33 [ 53.684135] BUG: Bad rss-counter state mm:000000008b93a2a2 type:MM_ANONPAGES val:22 [ 53.785757] ================================================================== [ 53.786701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.787684] Read of size 8 at addr ffff88801a3e8798 by task sshd/220 [ 53.788474] [ 53.788735] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 53.789729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.790738] Call Trace: [ 53.791074] [ 53.791374] dump_stack_lvl+0x91/0xf0 [ 53.791911] print_report+0xcc/0x620 [ 53.792416] ? __virt_addr_valid+0x102/0x340 [ 53.793001] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.793647] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.794289] kasan_report+0xbe/0xf0 [ 53.794784] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.795432] vma_interval_tree_remove+0xc75/0xec0 [ 53.796060] vma_prepare+0xc54/0x11a0 [ 53.796560] __split_vma+0x5af/0x950 [ 53.797077] ? __pfx___split_vma+0x10/0x10 [ 53.797629] ? find_held_lock+0x2c/0x110 [ 53.798174] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.798768] ? lock_is_held_type+0x9f/0x120 [ 53.799336] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.799968] ? mtree_range_walk+0x632/0x900 [ 53.800548] ? mas_walk+0x5c7/0x7c0 [ 53.801061] do_vmi_munmap+0x1f1/0x2b0 [ 53.801580] mmap_region+0x1f9/0x2660 [ 53.802082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.802619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.803374] ? __pfx_lock_acquire+0x10/0x10 [ 53.803936] ? __pfx_mmap_region+0x10/0x10 [ 53.804488] ? security_mmap_addr+0x7d/0xa0 [ 53.805070] ? get_unmapped_area+0x1f5/0x3f0 [ 53.805637] do_mmap+0x854/0xf00 [ 53.806106] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.806626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.807207] ksys_mmap_pgoff+0x3af/0x500 [ 53.807736] do_syscall_64+0x3f/0x90 [ 53.808239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.808930] RIP: 0033:0x7f01b2a9dd82 [ 53.809411] 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 [ 53.811637] RSP: 002b:00007ffe041ebc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.812591] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01b2a9dd82 [ 53.813478] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01b1ed7000 [ 53.814371] RBP: 00007f01b1ed7000 R08: 0000000000000009 R09: 0000000000001000 [ 53.815257] R10: 0000000000000812 R11: 0000000000000206 R12: 000055736ba6eec0 [ 53.816163] R13: 00007ffe041ebc20 R14: 00007ffe041ebc50 R15: 00007ffe041ebfb0 [ 53.817085] [ 53.817392] [ 53.817613] Allocated by task 213: [ 53.818066] kasan_save_stack+0x22/0x50 [ 53.818594] kasan_set_track+0x25/0x30 [ 53.819113] __kasan_slab_alloc+0x59/0x70 [ 53.819667] kmem_cache_alloc+0x16b/0x370 [ 53.820206] vm_area_dup+0x20/0x160 [ 53.820686] __split_vma+0x170/0x950 [ 53.821176] split_vma+0xc6/0x110 [ 53.821634] mprotect_fixup+0x8d2/0xb30 [ 53.822168] do_mprotect_pkey+0x87e/0xd40 [ 53.822710] __x64_sys_mprotect+0x78/0xc0 [ 53.823259] do_syscall_64+0x3f/0x90 [ 53.823747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.824416] [ 53.824649] Freed by task 203: [ 53.825063] kasan_save_stack+0x22/0x50 [ 53.825595] kasan_set_track+0x25/0x30 [ 53.826111] kasan_save_free_info+0x2b/0x50 [ 53.826670] __kasan_slab_free+0x10a/0x190 [ 53.827228] kmem_cache_free+0x10d/0x4d0 [ 53.827760] rcu_core+0x8c8/0x2860 [ 53.828227] __do_softirq+0x1b7/0x7d4 [ 53.828747] [ 53.828970] Last potentially related work creation: [ 53.829578] kasan_save_stack+0x22/0x50 [ 53.830108] __kasan_record_aux_stack+0x8e/0xa0 [ 53.830704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.831372] remove_vma+0x139/0x170 [ 53.831846] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.832419] do_vmi_munmap+0x1f1/0x2b0 [ 53.832918] __vm_munmap+0x138/0x3a0 [ 53.833386] __x64_sys_munmap+0x59/0x80 [ 53.833887] do_syscall_64+0x3f/0x90 [ 53.834367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.835012] [ 53.835229] The buggy address belongs to the object at ffff88801a3e8740 [ 53.835229] which belongs to the cache vm_area_struct of size 168 [ 53.836724] The buggy address is located 88 bytes inside of [ 53.836724] freed 168-byte region [ffff88801a3e8740, ffff88801a3e87e8) [ 53.838135] [ 53.838355] The buggy address belongs to the physical page: [ 53.839017] page:00000000333e2ec1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3e8 [ 53.840102] memcg:ffff888018569b01 [ 53.840530] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.841191] page_type: 0xffffffff() [ 53.841645] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 53.842565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018569b01 [ 53.843463] page dumped because: kasan: bad access detected [ 53.844123] [ 53.844339] Memory state around the buggy address: [ 53.844932] ffff88801a3e8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.845778] ffff88801a3e8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 53.846619] >ffff88801a3e8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 53.847467] ^ [ 53.847959] ffff88801a3e8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 53.848829] ffff88801a3e8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 53.849677] ================================================================== [ 53.850717] Disabling lock debugging due to kernel taint [ 56.083998] BUG: Bad rss-counter state mm:00000000a9ba0819 type:MM_FILEPAGES val:33 [ 56.085197] BUG: Bad rss-counter state mm:00000000a9ba0819 type:MM_ANONPAGES val:22 [ 56.621075] BUG: Bad rss-counter state mm:0000000042a912e0 type:MM_FILEPAGES val:33 [ 56.622235] BUG: Bad rss-counter state mm:0000000042a912e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64880' (ECDSA) to the list of known hosts. 2023/06/20 11:53:00 fuzzer started 2023/06/20 11:53:01 dialing manager at localhost:36067 2023/06/20 11:53:01 checking machine... 2023/06/20 11:53:01 checking revisions... [ 57.333446] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:53:01 testing simple program... [ 57.391427] cgroup: Unknown subsys name 'net' [ 57.434696] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:53:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018757750 RSP=ffff888018757688 R8 =ffffffff864b2030 R9 =ffff888018757738 R10=0000000000038001 R11=00000000000b5080 R12=ffff888018757758 R13=ffff888018757740 R14=ffff888018757f58 R15=ffff8880187576f8 RIP=ffffffff81131153 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 00007ffb5ccc3900 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=00007fff91d3b000 CR3=000000001008c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000025ef501ea0 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000025 RSI=ffff88806cf28140 RDI=000000000005425b RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f0df8 R11=00000025ef13c40c R12=000000000005425b R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000013 [----A-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=00007fe2c11d9870 CR3=000000000c522000 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=b0f998422d212db7de4a236a2d1c3b2d XMM02=000000000011b390eff9b2d0a8fce9cb XMM03=000000000011b4602c67c8bc2e329bc3 XMM04=06fac01ccd2eb75f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132668 XMM06=c291bd5c70af25b900000000001324f0 XMM07=e042d86d42eb936e0000000000122158 XMM08=144b0c66010003df000000000011b460 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000