syzkaller login: [ 31.954375] BUG: Bad rss-counter state mm:0000000040e04915 type:MM_FILEPAGES val:33 [ 31.955584] BUG: Bad rss-counter state mm:0000000040e04915 type:MM_ANONPAGES val:22 [ 32.125292] ================================================================== [ 32.126359] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.127485] Read of size 8 at addr ffff88801923ca50 by task sshd/220 [ 32.128583] [ 32.128841] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.129886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.131177] Call Trace: [ 32.131587] [ 32.131950] dump_stack_lvl+0x91/0xf0 [ 32.132476] print_report+0xcc/0x620 [ 32.132955] ? __virt_addr_valid+0x102/0x340 [ 32.133514] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.134121] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.134749] kasan_report+0xbe/0xf0 [ 32.135219] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.135863] vma_interval_tree_remove+0xc75/0xec0 [ 32.136497] vma_prepare+0xc54/0x11a0 [ 32.136964] __split_vma+0x5af/0x950 [ 32.137459] ? __pfx___split_vma+0x10/0x10 [ 32.137987] ? find_held_lock+0x2c/0x110 [ 32.138541] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.139133] ? lock_is_held_type+0x9f/0x120 [ 32.139695] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.140292] ? mtree_range_walk+0x632/0x900 [ 32.140873] ? mas_walk+0x5c7/0x7c0 [ 32.141351] do_vmi_munmap+0x1f1/0x2b0 [ 32.141853] mmap_region+0x1f9/0x2660 [ 32.142337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.142902] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.143655] ? __pfx_lock_acquire+0x10/0x10 [ 32.144190] ? __pfx_mmap_region+0x10/0x10 [ 32.144743] ? security_mmap_addr+0x7d/0xa0 [ 32.145271] ? get_unmapped_area+0x1f5/0x3f0 [ 32.145850] do_mmap+0x854/0xf00 [ 32.146293] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.146838] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.147440] ksys_mmap_pgoff+0x3af/0x500 [ 32.147962] do_syscall_64+0x3f/0x90 [ 32.148448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.149101] RIP: 0033:0x7f15f081cd82 [ 32.149581] 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 [ 32.151828] RSP: 002b:00007ffe4744a1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.152805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15f081cd82 [ 32.153699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15efc56000 [ 32.154580] RBP: 00007f15efc56000 R08: 0000000000000009 R09: 0000000000001000 [ 32.155503] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aecabfcec0 [ 32.156385] R13: 00007ffe4744a1f0 R14: 00007ffe4744a220 R15: 00007ffe4744a580 [ 32.157281] [ 32.157603] [ 32.157830] Allocated by task 213: [ 32.158270] kasan_save_stack+0x22/0x50 [ 32.158806] kasan_set_track+0x25/0x30 [ 32.159331] __kasan_slab_alloc+0x59/0x70 [ 32.159897] kmem_cache_alloc+0x16b/0x370 [ 32.160441] vm_area_dup+0x20/0x160 [ 32.160912] __split_vma+0x170/0x950 [ 32.161397] split_vma+0xc6/0x110 [ 32.161869] mprotect_fixup+0x8d2/0xb30 [ 32.162393] do_mprotect_pkey+0x87e/0xd40 [ 32.162932] __x64_sys_mprotect+0x78/0xc0 [ 32.163450] do_syscall_64+0x3f/0x90 [ 32.163929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.164609] [ 32.164823] Freed by task 213: [ 32.165233] kasan_save_stack+0x22/0x50 [ 32.165758] kasan_set_track+0x25/0x30 [ 32.166230] kasan_save_free_info+0x2b/0x50 [ 32.166760] __kasan_slab_free+0x10a/0x190 [ 32.167295] kmem_cache_free+0x10d/0x4d0 [ 32.167800] rcu_core+0x8c8/0x2860 [ 32.168223] __do_softirq+0x1b7/0x7d4 [ 32.168699] [ 32.168987] Last potentially related work creation: [ 32.169577] kasan_save_stack+0x22/0x50 [ 32.170099] __kasan_record_aux_stack+0x8e/0xa0 [ 32.170708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.171412] remove_vma+0x139/0x170 [ 32.171884] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.172496] do_vmi_munmap+0x1f1/0x2b0 [ 32.172997] __vm_munmap+0x138/0x3a0 [ 32.173497] __x64_sys_munmap+0x59/0x80 [ 32.174020] do_syscall_64+0x3f/0x90 [ 32.174535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.175210] [ 32.175444] The buggy address belongs to the object at ffff88801923c9f8 [ 32.175444] which belongs to the cache vm_area_struct of size 168 [ 32.176919] The buggy address is located 88 bytes inside of [ 32.176919] freed 168-byte region [ffff88801923c9f8, ffff88801923caa0) [ 32.178354] [ 32.178590] The buggy address belongs to the physical page: [ 32.179279] page:00000000905881f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1923c [ 32.180391] memcg:ffff888015c89401 [ 32.180825] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.181511] page_type: 0xffffffff() [ 32.181975] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.182923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c89401 [ 32.183843] page dumped because: kasan: bad access detected [ 32.184520] [ 32.184734] Memory state around the buggy address: [ 32.185308] ffff88801923c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.186198] ffff88801923c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.187093] >ffff88801923ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.187968] ^ [ 32.188688] ffff88801923ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.189573] ffff88801923cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.190440] ================================================================== [ 32.191630] Disabling lock debugging due to kernel taint [ 34.377164] BUG: Bad rss-counter state mm:000000004dd618db type:MM_FILEPAGES val:33 [ 34.378140] BUG: Bad rss-counter state mm:000000004dd618db type:MM_ANONPAGES val:22 [ 34.956512] BUG: Bad rss-counter state mm:000000007dc25062 type:MM_FILEPAGES val:33 [ 34.957711] BUG: Bad rss-counter state mm:000000007dc25062 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52359' (ECDSA) to the list of known hosts. 2023/06/21 00:39:41 fuzzer started 2023/06/21 00:39:42 dialing manager at localhost:36067 2023/06/21 00:39:42 checking machine... 2023/06/21 00:39:42 checking revisions... [ 35.510037] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:39:42 testing simple program... [ 35.555058] cgroup: Unknown subsys name 'net' [ 35.609781] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:39:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d990000 RCX=0000000000000000 RDX=ffff88800d990000 RSI=ffffffff818e96a6 RDI=0000000000000000 RBP=1ffff11001b55fba RSP=ffff88800daafd58 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800fbd2200 R11=0000000000000000 R12=ffff88800daafea8 R13=ffff88800fbd2200 R14=0000000000000000 R15=0000000000080000 RIP=ffffffff818e96a6 RFL=00000293 [--S-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 00007fb565993900 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=00007fb564dbf8c0 CR3=000000000c522000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=08e07b9912525c0c00000000000ae988 XMM05=2d83ab7c8907c81c0000000000134190 XMM06=4fda316b135da52b0000000000133230 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000017d65ab1fc RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=0000000000053d80 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f0010 R11=0000000000000001 R12=0000000000053d80 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000017 [----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 00007fa4acd01900 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=00007fa4ad2b8618 CR3=000000000cba8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000