syzkaller login: [ 34.671912] BUG: Bad rss-counter state mm:00000000520076e6 type:MM_FILEPAGES val:33 [ 34.672993] BUG: Bad rss-counter state mm:00000000520076e6 type:MM_ANONPAGES val:22 [ 34.849969] ================================================================== [ 34.851118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.852417] Read of size 8 at addr ffff88801035db38 by task sshd/220 [ 34.853361] [ 34.853627] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.854699] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.855895] Call Trace: [ 34.856298] [ 34.856647] dump_stack_lvl+0x91/0xf0 [ 34.857245] print_report+0xcc/0x620 [ 34.857843] ? __virt_addr_valid+0x102/0x340 [ 34.858523] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.859278] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.860040] kasan_report+0xbe/0xf0 [ 34.860622] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.861267] vma_interval_tree_remove+0xc75/0xec0 [ 34.861891] vma_prepare+0xc54/0x11a0 [ 34.862387] __split_vma+0x5af/0x950 [ 34.862885] ? __pfx___split_vma+0x10/0x10 [ 34.863437] ? find_held_lock+0x2c/0x110 [ 34.863973] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.864579] ? lock_is_held_type+0x9f/0x120 [ 34.865141] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.865760] ? mtree_range_walk+0x632/0x900 [ 34.866330] ? mas_walk+0x5c7/0x7c0 [ 34.866825] do_vmi_munmap+0x1f1/0x2b0 [ 34.867337] mmap_region+0x1f9/0x2660 [ 34.867847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.868389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.869141] ? __pfx_lock_acquire+0x10/0x10 [ 34.869699] ? __pfx_mmap_region+0x10/0x10 [ 34.870262] ? security_mmap_addr+0x7d/0xa0 [ 34.870822] ? get_unmapped_area+0x1f5/0x3f0 [ 34.871400] do_mmap+0x854/0xf00 [ 34.871857] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.872387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.872970] ksys_mmap_pgoff+0x3af/0x500 [ 34.873492] do_syscall_64+0x3f/0x90 [ 34.873985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.874660] RIP: 0033:0x7fc32385fd82 [ 34.875132] 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 [ 34.877374] RSP: 002b:00007ffe202f3338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.878309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc32385fd82 [ 34.879189] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc322c99000 [ 34.880087] RBP: 00007fc322c99000 R08: 0000000000000009 R09: 0000000000001000 [ 34.880967] R10: 0000000000000812 R11: 0000000000000206 R12: 000056070607cd90 [ 34.881844] R13: 00007ffe202f3350 R14: 00007ffe202f3380 R15: 00007ffe202f36e0 [ 34.882739] [ 34.883040] [ 34.883264] Allocated by task 213: [ 34.883707] kasan_save_stack+0x22/0x50 [ 34.884236] kasan_set_track+0x25/0x30 [ 34.884732] __kasan_slab_alloc+0x59/0x70 [ 34.885259] kmem_cache_alloc+0x16b/0x370 [ 34.885802] vm_area_dup+0x20/0x160 [ 34.886259] __split_vma+0x170/0x950 [ 34.886723] split_vma+0xc6/0x110 [ 34.887164] mprotect_fixup+0x8d2/0xb30 [ 34.887668] do_mprotect_pkey+0x87e/0xd40 [ 34.888202] __x64_sys_mprotect+0x78/0xc0 [ 34.888732] do_syscall_64+0x3f/0x90 [ 34.889201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.889844] [ 34.890060] Freed by task 213: [ 34.890448] kasan_save_stack+0x22/0x50 [ 34.890957] kasan_set_track+0x25/0x30 [ 34.891447] kasan_save_free_info+0x2b/0x50 [ 34.891976] __kasan_slab_free+0x10a/0x190 [ 34.892536] kmem_cache_free+0x10d/0x4d0 [ 34.893043] rcu_core+0x8c8/0x2860 [ 34.893488] __do_softirq+0x1b7/0x7d4 [ 34.893964] [ 34.894182] Last potentially related work creation: [ 34.894768] kasan_save_stack+0x22/0x50 [ 34.895276] __kasan_record_aux_stack+0x8e/0xa0 [ 34.895855] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.896515] remove_vma+0x139/0x170 [ 34.896972] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.897534] do_vmi_munmap+0x1f1/0x2b0 [ 34.898022] __vm_munmap+0x138/0x3a0 [ 34.898501] __x64_sys_munmap+0x59/0x80 [ 34.898997] do_syscall_64+0x3f/0x90 [ 34.899472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.900124] [ 34.900340] The buggy address belongs to the object at ffff88801035dae0 [ 34.900340] which belongs to the cache vm_area_struct of size 168 [ 34.901807] The buggy address is located 88 bytes inside of [ 34.901807] freed 168-byte region [ffff88801035dae0, ffff88801035db88) [ 34.903219] [ 34.903434] The buggy address belongs to the physical page: [ 34.904097] page:00000000465e2461 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1035d [ 34.905184] memcg:ffff888009b5cc01 [ 34.905615] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.906251] page_type: 0xffffffff() [ 34.906706] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.907624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b5cc01 [ 34.908549] page dumped because: kasan: bad access detected [ 34.909215] [ 34.909430] Memory state around the buggy address: [ 34.910026] ffff88801035da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.910883] ffff88801035da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.911731] >ffff88801035db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.912595] ^ [ 34.913209] ffff88801035db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.914067] ffff88801035dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.914919] ================================================================== [ 34.915925] Disabling lock debugging due to kernel taint [ 36.748544] BUG: Bad rss-counter state mm:00000000d0687766 type:MM_FILEPAGES val:33 [ 36.749741] BUG: Bad rss-counter state mm:00000000d0687766 type:MM_ANONPAGES val:22 [ 37.155544] BUG: Bad rss-counter state mm:000000007bf4c314 type:MM_FILEPAGES val:33 [ 37.156750] BUG: Bad rss-counter state mm:000000007bf4c314 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5536' (ECDSA) to the list of known hosts. 2023/06/20 07:14:03 fuzzer started 2023/06/20 07:14:04 dialing manager at localhost:44161 2023/06/20 07:14:04 checking machine... 2023/06/20 07:14:04 checking revisions... [ 37.724972] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:14:04 testing simple program... [ 37.761567] cgroup: Unknown subsys name 'net' [ 37.792273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:14:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fb7a6d1e000 CR3=000000000d824000 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=2033303a34313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a34313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf96e RBX=ffffffff85dfcb74 RCX=ffffffff8180cd08 RDX=0000000000000000 RSI=ffffffff86137736 RDI=ffffffff85dfcb70 RBP=ffffffff85dfcb74 RSP=ffff88806cf099e0 R8 =ffffffff86137736 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020de7 R12=ffffffff85dfcb74 R13=ffffffff85dfcb70 R14=ffffffff85dfcb70 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f4868abb900 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=00007ffec4d11000 CR3=0000000008db0000 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