syzkaller login: [ 30.595732] BUG: Bad rss-counter state mm:00000000c4e8470a type:MM_FILEPAGES val:33 [ 30.596967] BUG: Bad rss-counter state mm:00000000c4e8470a type:MM_ANONPAGES val:22 [ 30.636039] ================================================================== [ 30.636996] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.637926] Read of size 8 at addr ffff888010260c20 by task sshd/220 [ 30.638686] [ 30.638999] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.639958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.640983] Call Trace: [ 30.641309] <TASK> [ 30.641590] dump_stack_lvl+0x91/0xf0 [ 30.642110] print_report+0xcc/0x620 [ 30.642595] ? __virt_addr_valid+0x102/0x340 [ 30.643157] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643818] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644491] kasan_report+0xbe/0xf0 [ 30.645020] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.645688] vma_interval_tree_remove+0xc75/0xec0 [ 30.646330] vma_prepare+0xc54/0x11a0 [ 30.646839] __split_vma+0x5af/0x950 [ 30.647351] ? __pfx___split_vma+0x10/0x10 [ 30.647899] ? find_held_lock+0x2c/0x110 [ 30.648439] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.649067] ? lock_is_held_type+0x9f/0x120 [ 30.649621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.650242] ? mtree_range_walk+0x632/0x900 [ 30.650809] ? mas_walk+0x5c7/0x7c0 [ 30.651283] do_vmi_munmap+0x1f1/0x2b0 [ 30.651779] mmap_region+0x1f9/0x2660 [ 30.652262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.652777] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.653503] ? __pfx_lock_acquire+0x10/0x10 [ 30.654030] ? __pfx_mmap_region+0x10/0x10 [ 30.654565] ? security_mmap_addr+0x7d/0xa0 [ 30.655098] ? get_unmapped_area+0x1f5/0x3f0 [ 30.655649] do_mmap+0x854/0xf00 [ 30.656089] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.656589] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.657170] ksys_mmap_pgoff+0x3af/0x500 [ 30.657709] do_syscall_64+0x3f/0x90 [ 30.658214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658885] RIP: 0033:0x7fd0f87fbd82 [ 30.659365] 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 [ 30.661509] RSP: 002b:00007ffcd0c47258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.662406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0f87fbd82 [ 30.663247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0f7c35000 [ 30.664093] RBP: 00007fd0f7c35000 R08: 0000000000000009 R09: 0000000000001000 [ 30.664949] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619cd78bec0 [ 30.665784] R13: 00007ffcd0c47270 R14: 00007ffcd0c472a0 R15: 00007ffcd0c47600 [ 30.666640] </TASK> [ 30.666931] [ 30.667146] Allocated by task 213: [ 30.667579] kasan_save_stack+0x22/0x50 [ 30.668079] kasan_set_track+0x25/0x30 [ 30.668569] __kasan_slab_alloc+0x59/0x70 [ 30.669112] kmem_cache_alloc+0x16b/0x370 [ 30.669672] vm_area_dup+0x20/0x160 [ 30.670130] __split_vma+0x170/0x950 [ 30.670602] split_vma+0xc6/0x110 [ 30.671052] mprotect_fixup+0x8d2/0xb30 [ 30.671567] do_mprotect_pkey+0x87e/0xd40 [ 30.672090] __x64_sys_mprotect+0x78/0xc0 [ 30.672608] do_syscall_64+0x3f/0x90 [ 30.673094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673728] [ 30.673939] Freed by task 213: [ 30.674327] kasan_save_stack+0x22/0x50 [ 30.674821] kasan_set_track+0x25/0x30 [ 30.675340] kasan_save_free_info+0x2b/0x50 [ 30.675892] __kasan_slab_free+0x10a/0x190 [ 30.676443] kmem_cache_free+0x10d/0x4d0 [ 30.676987] rcu_core+0x8c8/0x2860 [ 30.677441] __do_softirq+0x1b7/0x7d4 [ 30.677922] [ 30.678140] Last potentially related work creation: [ 30.678771] kasan_save_stack+0x22/0x50 [ 30.679293] __kasan_record_aux_stack+0x8e/0xa0 [ 30.679894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.680553] remove_vma+0x139/0x170 [ 30.681027] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.681585] do_vmi_munmap+0x1f1/0x2b0 [ 30.682080] __vm_munmap+0x138/0x3a0 [ 30.682552] __x64_sys_munmap+0x59/0x80 [ 30.683051] do_syscall_64+0x3f/0x90 [ 30.683529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.684187] [ 30.684405] The buggy address belongs to the object at ffff888010260bc8 [ 30.684405] which belongs to the cache vm_area_struct of size 168 [ 30.685886] The buggy address is located 88 bytes inside of [ 30.685886] freed 168-byte region [ffff888010260bc8, ffff888010260c70) [ 30.687322] [ 30.687540] The buggy address belongs to the physical page: [ 30.688203] page:00000000080bc82f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10260 [ 30.689315] memcg:ffff88800cf3e501 [ 30.689759] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.690405] page_type: 0xffffffff() [ 30.690853] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.691784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf3e501 [ 30.692688] page dumped because: kasan: bad access detected [ 30.693370] [ 30.693590] Memory state around the buggy address: [ 30.694190] ffff888010260b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.695051] ffff888010260b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.695920] >ffff888010260c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.696793] ^ [ 30.697393] ffff888010260c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.698329] ffff888010260d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.699249] ================================================================== [ 30.700710] Disabling lock debugging due to kernel taint [ 32.590373] BUG: Bad rss-counter state mm:00000000dedb6101 type:MM_FILEPAGES val:33 [ 32.591129] BUG: Bad rss-counter state mm:00000000dedb6101 type:MM_ANONPAGES val:22 [ 33.054839] BUG: Bad rss-counter state mm:00000000cce19515 type:MM_FILEPAGES val:33 [ 33.055880] BUG: Bad rss-counter state mm:00000000cce19515 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7787' (ECDSA) to the list of known hosts. 2023/06/21 00:26:40 fuzzer started 2023/06/21 00:26:40 dialing manager at localhost:36067 2023/06/21 00:26:40 checking machine... 2023/06/21 00:26:40 checking revisions... [ 33.760392] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:26:40 testing simple program... [ 33.801835] cgroup: Unknown subsys name 'net' [ 33.850604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:40 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=0000000037f2f797 RCX=ffff88806c57bcb8 RDX=000000000000000e RSI=0000000000000001 RDI=00000000dceea248 RBP=ffff88800e7f6e50 RSP=ffff888014607580 R8 =00000000415bc8a6 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff8880146075e8 R15=000000000000000e RIP=ffffffff822704ed 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 00007fbaf6410900 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=00007fbaf588c2c0 CR3=000000000d808000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=56a46f9a2a4f241c00000000000ae988 XMM05=035157ca6223ec9f0000000000132c10 XMM06=19e9129bd510f2350000000000131aa8 XMM07=fb795ef6d65770560000000000121a18 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a70 RCX=0000000000000001 RDX=1ffff1100d9e134f RSI=ffff888015a5fb18 RDI=ffff88806cf09a78 RBP=ffff888015a5fb18 RSP=ffff88806cf099c8 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020c57 R12=0000000000000008 R13=ffff88806cf09ab8 R14=ffff888015a5fb18 R15=ffff88806cf09a70 RIP=ffffffff81130445 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 00007f511a02c900 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=00007ffca1ae0000 CR3=000000000caa6000 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=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