syzkaller login: [ 40.398522] BUG: Bad rss-counter state mm:00000000152efdcf type:MM_FILEPAGES val:33 [ 40.399517] BUG: Bad rss-counter state mm:00000000152efdcf type:MM_ANONPAGES val:22 [ 40.579049] ================================================================== [ 40.579960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.581025] Read of size 8 at addr ffff888018e28880 by task sshd/221 [ 40.581801] [ 40.582028] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.582933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.583923] Call Trace: [ 40.584265] [ 40.584553] dump_stack_lvl+0x91/0xf0 [ 40.585051] print_report+0xcc/0x620 [ 40.585542] ? __virt_addr_valid+0x102/0x340 [ 40.586113] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.586745] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.587371] kasan_report+0xbe/0xf0 [ 40.587842] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.588474] vma_interval_tree_remove+0xc75/0xec0 [ 40.589082] vma_prepare+0xc54/0x11a0 [ 40.589564] __split_vma+0x5af/0x950 [ 40.590036] ? __pfx___split_vma+0x10/0x10 [ 40.590582] ? find_held_lock+0x2c/0x110 [ 40.591134] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.591704] ? lock_is_held_type+0x9f/0x120 [ 40.592251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.592861] ? mtree_range_walk+0x632/0x900 [ 40.593421] ? mas_walk+0x5c7/0x7c0 [ 40.593895] do_vmi_munmap+0x1f1/0x2b0 [ 40.594426] mmap_region+0x1f9/0x2660 [ 40.594906] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.595437] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.596167] ? __pfx_lock_acquire+0x10/0x10 [ 40.596694] ? __pfx_mmap_region+0x10/0x10 [ 40.597236] ? security_mmap_addr+0x7d/0xa0 [ 40.597757] ? get_unmapped_area+0x1f5/0x3f0 [ 40.598332] do_mmap+0x854/0xf00 [ 40.598773] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.599280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.599838] ksys_mmap_pgoff+0x3af/0x500 [ 40.600357] do_syscall_64+0x3f/0x90 [ 40.600832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.601502] RIP: 0033:0x7ff8f057fd82 [ 40.601960] 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 [ 40.604124] RSP: 002b:00007fffaa7c9978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.605025] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8f057fd82 [ 40.605877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8ef9b9000 [ 40.606756] RBP: 00007ff8ef9b9000 R08: 0000000000000009 R09: 0000000000001000 [ 40.607621] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561901510d90 [ 40.608475] R13: 00007fffaa7c9990 R14: 00007fffaa7c99c0 R15: 00007fffaa7c9d20 [ 40.609338] [ 40.609630] [ 40.609844] Allocated by task 214: [ 40.610326] kasan_save_stack+0x22/0x50 [ 40.610829] kasan_set_track+0x25/0x30 [ 40.611336] __kasan_slab_alloc+0x59/0x70 [ 40.611858] kmem_cache_alloc+0x16b/0x370 [ 40.612392] vm_area_dup+0x20/0x160 [ 40.612846] __split_vma+0x170/0x950 [ 40.613326] split_vma+0xc6/0x110 [ 40.613775] mprotect_fixup+0x8d2/0xb30 [ 40.614325] do_mprotect_pkey+0x87e/0xd40 [ 40.614848] __x64_sys_mprotect+0x78/0xc0 [ 40.615380] do_syscall_64+0x3f/0x90 [ 40.615856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.616502] [ 40.616718] Freed by task 211: [ 40.617127] kasan_save_stack+0x22/0x50 [ 40.617632] kasan_set_track+0x25/0x30 [ 40.618131] kasan_save_free_info+0x2b/0x50 [ 40.618673] __kasan_slab_free+0x10a/0x190 [ 40.619234] kmem_cache_free+0x10d/0x4d0 [ 40.619746] rcu_core+0x8c8/0x2860 [ 40.620200] __do_softirq+0x1b7/0x7d4 [ 40.620678] [ 40.620890] Last potentially related work creation: [ 40.621490] kasan_save_stack+0x22/0x50 [ 40.621994] __kasan_record_aux_stack+0x8e/0xa0 [ 40.622600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.623295] remove_vma+0x139/0x170 [ 40.623748] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.624330] do_vmi_munmap+0x1f1/0x2b0 [ 40.624818] __vm_munmap+0x138/0x3a0 [ 40.625323] __x64_sys_munmap+0x59/0x80 [ 40.625817] do_syscall_64+0x3f/0x90 [ 40.626324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.626962] [ 40.627194] The buggy address belongs to the object at ffff888018e28828 [ 40.627194] which belongs to the cache vm_area_struct of size 168 [ 40.628663] The buggy address is located 88 bytes inside of [ 40.628663] freed 168-byte region [ffff888018e28828, ffff888018e288d0) [ 40.630088] [ 40.630330] The buggy address belongs to the physical page: [ 40.630980] page:00000000234b2ce1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e28 [ 40.632101] memcg:ffff888018e21401 [ 40.632534] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.633202] page_type: 0xffffffff() [ 40.633652] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.634591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e21401 [ 40.635520] page dumped because: kasan: bad access detected [ 40.636190] [ 40.636406] Memory state around the buggy address: [ 40.636982] ffff888018e28780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.637839] ffff888018e28800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.638715] >ffff888018e28880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.639582] ^ [ 40.639992] ffff888018e28900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.640855] ffff888018e28980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 40.641732] ================================================================== [ 40.642848] Disabling lock debugging due to kernel taint [ 42.728454] BUG: Bad rss-counter state mm:00000000f2b6830f type:MM_FILEPAGES val:33 [ 42.729619] BUG: Bad rss-counter state mm:00000000f2b6830f type:MM_ANONPAGES val:22 [ 43.090784] BUG: Bad rss-counter state mm:000000003a438044 type:MM_FILEPAGES val:33 [ 43.092168] BUG: Bad rss-counter state mm:000000003a438044 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12555' (ECDSA) to the list of known hosts. 2023/06/20 07:30:34 fuzzer started 2023/06/20 07:30:34 dialing manager at localhost:44161 2023/06/20 07:30:34 checking machine... 2023/06/20 07:30:34 checking revisions... [ 43.807694] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:30:34 testing simple program... [ 43.853744] cgroup: Unknown subsys name 'net' [ 43.905591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:30:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801bdbfe88 RCX=1ffff11001c10f3f RDX=1ffff110037b7fd1 RSI=ffffffff87b86f80 RDI=ffff88800efe4770 RBP=ffff88800eec7000 RSP=ffff88806ce09e08 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=0000000000000287 R13=ffff88800efe4768 R14=ffffffff813782a8 R15=ffff88800cab48a0 RIP=ffffffff84513679 RFL=00000046 [---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 00007f1d61928700 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=00007ffc1db21000 CR3=000000000e24a000 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=30333a3730203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343437 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85d9f1fc RCX=ffffffff811fc523 RDX=0000000000000000 RSI=ffffffff860ab102 RDI=ffffffff85d9f1f8 RBP=ffffffff85d9f1f8 RSP=ffff888018f87908 R8 =ffffffff860ab102 R9 =ffff888018f87a00 R10=0000000000038001 R11=0000000000009789 R12=ffffffff85d9f1f8 R13=ffffffff85d9f1f8 R14=ffffffff85d9f1f8 R15=dffffc0000000000 RIP=ffffffff8112fc6e 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 00007f909f4c9900 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=00007f90a30a6e90 CR3=000000000d7e6000 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