syzkaller login: [ 31.084054] BUG: Bad rss-counter state mm:000000004da515f9 type:MM_FILEPAGES val:33 [ 31.085022] BUG: Bad rss-counter state mm:000000004da515f9 type:MM_ANONPAGES val:22 [ 31.199116] ================================================================== [ 31.199837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.200523] Read of size 8 at addr ffff888010182df0 by task sshd/219 [ 31.201063] [ 31.201215] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.201858] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.202530] Call Trace: [ 31.202747] [ 31.202952] dump_stack_lvl+0x91/0xf0 [ 31.203586] print_report+0xcc/0x620 [ 31.203932] ? __virt_addr_valid+0x102/0x340 [ 31.204337] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205206] kasan_report+0xbe/0xf0 [ 31.205587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206012] vma_interval_tree_remove+0xc75/0xec0 [ 31.206421] vma_prepare+0xc54/0x11a0 [ 31.206747] __split_vma+0x5af/0x950 [ 31.207085] ? __pfx___split_vma+0x10/0x10 [ 31.207459] ? find_held_lock+0x2c/0x110 [ 31.207821] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.208204] ? lock_is_held_type+0x9f/0x120 [ 31.208608] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.209024] ? mtree_range_walk+0x632/0x900 [ 31.209399] ? mas_walk+0x5c7/0x7c0 [ 31.209720] do_vmi_munmap+0x1f1/0x2b0 [ 31.210052] mmap_region+0x1f9/0x2660 [ 31.210365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.210699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.211166] ? __pfx_lock_acquire+0x10/0x10 [ 31.211504] ? __pfx_mmap_region+0x10/0x10 [ 31.211862] ? security_mmap_addr+0x7d/0xa0 [ 31.212229] ? get_unmapped_area+0x1f5/0x3f0 [ 31.212667] do_mmap+0x854/0xf00 [ 31.212985] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.213338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.213738] ksys_mmap_pgoff+0x3af/0x500 [ 31.214094] do_syscall_64+0x3f/0x90 [ 31.214432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214917] RIP: 0033:0x7f0820a63d82 [ 31.215240] 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 [ 31.216772] RSP: 002b:00007ffcbb216a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.217432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0820a63d82 [ 31.218030] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f081fe9d000 [ 31.218625] RBP: 00007f081fe9d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.219223] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff4d44aec0 [ 31.219836] R13: 00007ffcbb216a40 R14: 00007ffcbb216a70 R15: 00007ffcbb216dd0 [ 31.220478] [ 31.220696] [ 31.220878] Allocated by task 212: [ 31.221183] kasan_save_stack+0x22/0x50 [ 31.221548] kasan_set_track+0x25/0x30 [ 31.221933] __kasan_slab_alloc+0x59/0x70 [ 31.222311] kmem_cache_alloc+0x16b/0x370 [ 31.222681] vm_area_dup+0x20/0x160 [ 31.223053] __split_vma+0x170/0x950 [ 31.223373] split_vma+0xc6/0x110 [ 31.223687] mprotect_fixup+0x8d2/0xb30 [ 31.224049] do_mprotect_pkey+0x87e/0xd40 [ 31.224457] __x64_sys_mprotect+0x78/0xc0 [ 31.224819] do_syscall_64+0x3f/0x90 [ 31.225159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225608] [ 31.225775] Freed by task 202: [ 31.226048] kasan_save_stack+0x22/0x50 [ 31.226398] kasan_set_track+0x25/0x30 [ 31.226742] kasan_save_free_info+0x2b/0x50 [ 31.227123] __kasan_slab_free+0x10a/0x190 [ 31.227486] kmem_cache_free+0x10d/0x4d0 [ 31.227832] rcu_core+0x8c8/0x2860 [ 31.228129] __do_softirq+0x1b7/0x7d4 [ 31.228508] [ 31.228650] Last potentially related work creation: [ 31.229059] kasan_save_stack+0x22/0x50 [ 31.229398] __kasan_record_aux_stack+0x8e/0xa0 [ 31.229772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230178] remove_vma+0x139/0x170 [ 31.230470] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230858] do_vmi_munmap+0x1f1/0x2b0 [ 31.231187] __vm_munmap+0x138/0x3a0 [ 31.231516] __x64_sys_munmap+0x59/0x80 [ 31.231854] do_syscall_64+0x3f/0x90 [ 31.232179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232668] [ 31.232821] The buggy address belongs to the object at ffff888010182d98 [ 31.232821] which belongs to the cache vm_area_struct of size 168 [ 31.233860] The buggy address is located 88 bytes inside of [ 31.233860] freed 168-byte region [ffff888010182d98, ffff888010182e40) [ 31.234804] [ 31.234967] The buggy address belongs to the physical page: [ 31.235425] page:0000000007294311 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10182 [ 31.236177] memcg:ffff888015935101 [ 31.236517] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.236973] page_type: 0xffffffff() [ 31.237294] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.237944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015935101 [ 31.238558] page dumped because: kasan: bad access detected [ 31.239009] [ 31.239154] Memory state around the buggy address: [ 31.239557] ffff888010182c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.240156] ffff888010182d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.240801] >ffff888010182d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.241411] ^ [ 31.241955] ffff888010182e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.242516] ffff888010182e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.243108] ================================================================== [ 31.244181] Disabling lock debugging due to kernel taint [ 32.703091] BUG: Bad rss-counter state mm:000000009685218b type:MM_FILEPAGES val:33 [ 32.703746] BUG: Bad rss-counter state mm:000000009685218b type:MM_ANONPAGES val:22 [ 33.078284] BUG: Bad rss-counter state mm:000000005c86bc13 type:MM_FILEPAGES val:33 [ 33.079026] BUG: Bad rss-counter state mm:000000005c86bc13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63204' (ECDSA) to the list of known hosts. 2023/06/21 09:03:10 fuzzer started 2023/06/21 09:03:10 dialing manager at localhost:36067 2023/06/21 09:03:10 checking machine... 2023/06/21 09:03:10 checking revisions... [ 33.638708] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:03:10 testing simple program... [ 33.681189] cgroup: Unknown subsys name 'net' [ 33.735507] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:03:09 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffffffff866212df RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=ffffffff866212df RBP=ffffffff866212df RSP=ffff88806ce09a20 R8 =0000000000000007 R9 =ffffffffff600000 R10=ffffffff86621000 R11=00000000000b54e7 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ce2ca00 RIP=ffffffff814c086b RFL=00000202 [-------] 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 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=00007fb5dc6fccf0 CR3=000000000d726000 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=2039303a33303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a33303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864ab9ad RBX=0000000000000001 RCX=ffffffff864ab9a8 RDX=0000000000000000 RSI=ffffffff864ab9ad RDI=ffffffff8604a784 RBP=ffff8880169af1b0 RSP=ffff8880169af0e8 R8 =ffffffff864ab9a8 R9 =ffff8880169af198 R10=0000000000038001 R11=00000000000b3f70 R12=ffff8880169af1b8 R13=ffff8880169af1a0 R14=ffff8880169af199 R15=ffff8880169af158 RIP=ffffffff81130a5e RFL=00000217 [----APC] 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 00007f9f093af900 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=00007f9f0938e020 CR3=0000000018e6c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000