syzkaller login: [ 31.160191] BUG: Bad rss-counter state mm:00000000de6a58b0 type:MM_FILEPAGES val:33 [ 31.161428] BUG: Bad rss-counter state mm:00000000de6a58b0 type:MM_ANONPAGES val:22 [ 31.195859] ================================================================== [ 31.196911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.198056] Read of size 8 at addr ffff888019969228 by task sshd/219 [ 31.198997] [ 31.199221] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.200257] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.201319] Call Trace: [ 31.201707] [ 31.202010] dump_stack_lvl+0x91/0xf0 [ 31.202540] print_report+0xcc/0x620 [ 31.203090] ? __virt_addr_valid+0x102/0x340 [ 31.203638] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.204391] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205013] kasan_report+0xbe/0xf0 [ 31.205486] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206115] vma_interval_tree_remove+0xc75/0xec0 [ 31.206717] vma_prepare+0xc54/0x11a0 [ 31.207304] __split_vma+0x5af/0x950 [ 31.207817] ? __pfx___split_vma+0x10/0x10 [ 31.208358] ? find_held_lock+0x2c/0x110 [ 31.209009] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.209715] ? lock_is_held_type+0x9f/0x120 [ 31.210258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.210906] ? mtree_range_walk+0x632/0x900 [ 31.211500] ? mas_walk+0x5c7/0x7c0 [ 31.211981] do_vmi_munmap+0x1f1/0x2b0 [ 31.212609] mmap_region+0x1f9/0x2660 [ 31.213172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.213769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.214488] ? __pfx_lock_acquire+0x10/0x10 [ 31.215018] ? __pfx_mmap_region+0x10/0x10 [ 31.215558] ? security_mmap_addr+0x7d/0xa0 [ 31.216102] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216660] do_mmap+0x854/0xf00 [ 31.217100] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217597] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218158] ksys_mmap_pgoff+0x3af/0x500 [ 31.218671] do_syscall_64+0x3f/0x90 [ 31.219152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219802] RIP: 0033:0x7f3b4a0b4d82 [ 31.220267] 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 [ 31.222411] RSP: 002b:00007ffeb7c9d348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223322] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b4a0b4d82 [ 31.224355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b494ee000 [ 31.225205] RBP: 00007f3b494ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.226084] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ae8e8df70 [ 31.226930] R13: 00007ffeb7c9d360 R14: 00007ffeb7c9d390 R15: 00007ffeb7c9d6f0 [ 31.227792] [ 31.228096] [ 31.228314] Allocated by task 212: [ 31.228744] kasan_save_stack+0x22/0x50 [ 31.229250] kasan_set_track+0x25/0x30 [ 31.229744] __kasan_slab_alloc+0x59/0x70 [ 31.230270] kmem_cache_alloc+0x16b/0x370 [ 31.230783] vm_area_dup+0x20/0x160 [ 31.231248] __split_vma+0x170/0x950 [ 31.231712] split_vma+0xc6/0x110 [ 31.232152] mprotect_fixup+0x8d2/0xb30 [ 31.232659] do_mprotect_pkey+0x87e/0xd40 [ 31.233181] __x64_sys_mprotect+0x78/0xc0 [ 31.233703] do_syscall_64+0x3f/0x90 [ 31.234183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234834] [ 31.235048] Freed by task 202: [ 31.235442] kasan_save_stack+0x22/0x50 [ 31.235944] kasan_set_track+0x25/0x30 [ 31.236460] kasan_save_free_info+0x2b/0x50 [ 31.236993] __kasan_slab_free+0x10a/0x190 [ 31.237533] kmem_cache_free+0x10d/0x4d0 [ 31.238036] rcu_core+0x8c8/0x2860 [ 31.238480] __do_softirq+0x1b7/0x7d4 [ 31.238961] [ 31.239176] Last potentially related work creation: [ 31.239763] kasan_save_stack+0x22/0x50 [ 31.240295] __kasan_record_aux_stack+0x8e/0xa0 [ 31.240876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241529] remove_vma+0x139/0x170 [ 31.241980] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242540] do_vmi_munmap+0x1f1/0x2b0 [ 31.243026] __vm_munmap+0x138/0x3a0 [ 31.243499] __x64_sys_munmap+0x59/0x80 [ 31.244015] do_syscall_64+0x3f/0x90 [ 31.244493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245140] [ 31.245353] The buggy address belongs to the object at ffff8880199691d0 [ 31.245353] which belongs to the cache vm_area_struct of size 168 [ 31.246844] The buggy address is located 88 bytes inside of [ 31.246844] freed 168-byte region [ffff8880199691d0, ffff888019969278) [ 31.248267] [ 31.248485] The buggy address belongs to the physical page: [ 31.249148] page:000000008d58c1a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19969 [ 31.250246] memcg:ffff88800ec0fb01 [ 31.250684] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.251343] page_type: 0xffffffff() [ 31.251797] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.252724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec0fb01 [ 31.253644] page dumped because: kasan: bad access detected [ 31.254312] [ 31.254527] Memory state around the buggy address: [ 31.255117] ffff888019969100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.255984] ffff888019969180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.256892] >ffff888019969200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.257753] ^ [ 31.258323] ffff888019969280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.259189] ffff888019969300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.260051] ================================================================== [ 31.260985] Disabling lock debugging due to kernel taint [ 33.214240] BUG: Bad rss-counter state mm:00000000ebee97ec type:MM_FILEPAGES val:33 [ 33.215802] BUG: Bad rss-counter state mm:00000000ebee97ec type:MM_ANONPAGES val:22 [ 33.780267] BUG: Bad rss-counter state mm:00000000fef911bd type:MM_FILEPAGES val:33 [ 33.781423] BUG: Bad rss-counter state mm:00000000fef911bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53336' (ECDSA) to the list of known hosts. 2023/06/20 21:46:49 fuzzer started 2023/06/20 21:46:50 dialing manager at localhost:36067 2023/06/20 21:46:50 checking machine... 2023/06/20 21:46:50 checking revisions... [ 34.419904] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:46:50 testing simple program... [ 34.471911] cgroup: Unknown subsys name 'net' [ 34.524932] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:46:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff864b6d1e RDX=ffff88806ce09ae0 RSI=1ffff1100d9c135e RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b6d22 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff811310a7 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 00007f6a83297700 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=00007f8bd81946d0 CR3=000000000f722000 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=2039343a36343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a36343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000005 RBX=0000000000000001 RCX=ffffffff817f6a4a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000003 RBP=ffffffff87b7de20 RSP=ffff88801035f138 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000092800 R13=0000000000000000 R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff814c03d8 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 00007f190ce9a900 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=00007f190ce64008 CR3=000000001679e000 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