syzkaller login: [ 31.210191] BUG: Bad rss-counter state mm:00000000cdb72811 type:MM_FILEPAGES val:33 [ 31.211669] BUG: Bad rss-counter state mm:00000000cdb72811 type:MM_ANONPAGES val:22 [ 31.355976] ================================================================== [ 31.357081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.358330] Read of size 8 at addr ffff888016acd968 by task sshd/220 [ 31.359278] [ 31.359534] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.360616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.361838] Call Trace: [ 31.362231] <TASK> [ 31.362601] dump_stack_lvl+0x91/0xf0 [ 31.363189] print_report+0xcc/0x620 [ 31.363785] ? __virt_addr_valid+0x102/0x340 [ 31.364447] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365188] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365938] kasan_report+0xbe/0xf0 [ 31.366517] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367294] vma_interval_tree_remove+0xc75/0xec0 [ 31.367931] vma_prepare+0xc54/0x11a0 [ 31.368424] __split_vma+0x5af/0x950 [ 31.368897] ? __pfx___split_vma+0x10/0x10 [ 31.369429] ? find_held_lock+0x2c/0x110 [ 31.369962] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.370542] ? lock_is_held_type+0x9f/0x120 [ 31.371085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.371698] ? mtree_range_walk+0x632/0x900 [ 31.372247] ? mas_walk+0x5c7/0x7c0 [ 31.372720] do_vmi_munmap+0x1f1/0x2b0 [ 31.373217] mmap_region+0x1f9/0x2660 [ 31.373703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.374221] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.374957] ? __pfx_lock_acquire+0x10/0x10 [ 31.375483] ? __pfx_mmap_region+0x10/0x10 [ 31.376012] ? security_mmap_addr+0x7d/0xa0 [ 31.376541] ? get_unmapped_area+0x1f5/0x3f0 [ 31.377088] do_mmap+0x854/0xf00 [ 31.377530] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.378027] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.378610] ksys_mmap_pgoff+0x3af/0x500 [ 31.379122] do_syscall_64+0x3f/0x90 [ 31.379612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380258] RIP: 0033:0x7f9a94321d82 [ 31.380717] 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 [ 31.382865] RSP: 002b:00007ffdee9c79e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.383765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a94321d82 [ 31.384605] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a9375b000 [ 31.385440] RBP: 00007f9a9375b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.386287] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b161aa5ec0 [ 31.387134] R13: 00007ffdee9c7a00 R14: 00007ffdee9c7a30 R15: 00007ffdee9c7d90 [ 31.387985] </TASK> [ 31.388275] [ 31.388489] Allocated by task 213: [ 31.388915] kasan_save_stack+0x22/0x50 [ 31.389415] kasan_set_track+0x25/0x30 [ 31.389906] __kasan_slab_alloc+0x59/0x70 [ 31.390434] kmem_cache_alloc+0x16b/0x370 [ 31.390944] vm_area_dup+0x20/0x160 [ 31.391395] __split_vma+0x170/0x950 [ 31.391861] split_vma+0xc6/0x110 [ 31.392297] mprotect_fixup+0x8d2/0xb30 [ 31.392799] do_mprotect_pkey+0x87e/0xd40 [ 31.393314] __x64_sys_mprotect+0x78/0xc0 [ 31.393833] do_syscall_64+0x3f/0x90 [ 31.394326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.394976] [ 31.395191] Freed by task 19: [ 31.395577] kasan_save_stack+0x22/0x50 [ 31.396089] kasan_set_track+0x25/0x30 [ 31.396584] kasan_save_free_info+0x2b/0x50 [ 31.397119] __kasan_slab_free+0x10a/0x190 [ 31.397662] kmem_cache_free+0x10d/0x4d0 [ 31.398171] rcu_core+0x8c8/0x2860 [ 31.398622] __do_softirq+0x1b7/0x7d4 [ 31.399099] [ 31.399315] Last potentially related work creation: [ 31.399896] kasan_save_stack+0x22/0x50 [ 31.400398] __kasan_record_aux_stack+0x8e/0xa0 [ 31.400971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.401606] remove_vma+0x139/0x170 [ 31.402058] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.402632] do_vmi_munmap+0x1f1/0x2b0 [ 31.403117] __vm_munmap+0x138/0x3a0 [ 31.403582] __x64_sys_munmap+0x59/0x80 [ 31.404077] do_syscall_64+0x3f/0x90 [ 31.404552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405192] [ 31.405405] The buggy address belongs to the object at ffff888016acd910 [ 31.405405] which belongs to the cache vm_area_struct of size 168 [ 31.407038] The buggy address is located 88 bytes inside of [ 31.407038] freed 168-byte region [ffff888016acd910, ffff888016acd9b8) [ 31.408505] [ 31.408725] The buggy address belongs to the physical page: [ 31.409381] page:000000000cf0b46b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16acd [ 31.410500] memcg:ffff88800c64d901 [ 31.410937] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.411598] page_type: 0xffffffff() [ 31.412056] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.412981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c64d901 [ 31.413893] page dumped because: kasan: bad access detected [ 31.414574] [ 31.414798] Memory state around the buggy address: [ 31.415422] ffff888016acd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.416339] ffff888016acd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.417250] >ffff888016acd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.418148] ^ [ 31.418981] ffff888016acd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.419912] ffff888016acda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.420825] ================================================================== [ 31.421900] Disabling lock debugging due to kernel taint [ 33.705751] BUG: Bad rss-counter state mm:00000000dfed8528 type:MM_FILEPAGES val:33 [ 33.706900] BUG: Bad rss-counter state mm:00000000dfed8528 type:MM_ANONPAGES val:22 [ 34.172744] BUG: Bad rss-counter state mm:00000000a0dc723d type:MM_FILEPAGES val:33 [ 34.173959] BUG: Bad rss-counter state mm:00000000a0dc723d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61073' (ECDSA) to the list of known hosts. 2023/06/20 15:41:06 fuzzer started 2023/06/20 15:41:07 dialing manager at localhost:36067 2023/06/20 15:41:07 checking machine... 2023/06/20 15:41:07 checking revisions... [ 34.926577] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:41:07 testing simple program... [ 34.975743] cgroup: Unknown subsys name 'net' [ 35.030789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:41:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8363e064 RCX=0000000000000001 RDX=1ffff11001d89e9e RSI=ffff88800ec4fce8 RDI=ffffffff8363e064 RBP=ffff88800ec4f4f0 RSP=ffff88800ec4f468 R8 =0000000000000001 R9 =ffff88800ec4f4d8 R10=0000000000038001 R11=000000000008a88c R12=ffff88800ec4f560 R13=0000000000000000 R14=ffff888016f1d1c0 R15=0000000000000cc0 RIP=ffffffff811fc7a0 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 00007ff0fb703900 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=00007ffc7497d000 CR3=000000000caca000 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=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=00007fd43d115940 CR3=000000000f164000 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=f4635e24015824aeb0464eecbd7529d7 XMM02=000000000011c140eff9b2d0a8fce9cb XMM03=000000000011c2102c67c8bc2e329bc3 XMM04=b6518f662dd8e1a700000000000ae988 XMM05=19e9129bd510f23500000000001330a0 XMM06=909fe01135ddc8660000000000131f08 XMM07=e042d86d42eb936e0000000000123540 XMM08=8337e8ce9c8cfb81000000000011c210 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000