syzkaller login: [ 30.026913] BUG: Bad rss-counter state mm:0000000041695179 type:MM_FILEPAGES val:33 [ 30.027695] BUG: Bad rss-counter state mm:0000000041695179 type:MM_ANONPAGES val:22 [ 30.203670] ================================================================== [ 30.204567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.205486] Read of size 8 at addr ffff88800ef6f4e0 by task sshd/222 [ 30.206262] [ 30.206583] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.207433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.208377] Call Trace: [ 30.208729] [ 30.209012] dump_stack_lvl+0x91/0xf0 [ 30.209504] print_report+0xcc/0x620 [ 30.209988] ? __virt_addr_valid+0x102/0x340 [ 30.210534] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211139] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.211741] kasan_report+0xbe/0xf0 [ 30.212215] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.212846] vma_interval_tree_remove+0xc75/0xec0 [ 30.213449] vma_prepare+0xc54/0x11a0 [ 30.213927] __split_vma+0x5af/0x950 [ 30.214398] ? __pfx___split_vma+0x10/0x10 [ 30.214921] ? find_held_lock+0x2c/0x110 [ 30.215435] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.216002] ? lock_is_held_type+0x9f/0x120 [ 30.216529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.217151] ? mtree_range_walk+0x632/0x900 [ 30.217701] ? mas_walk+0x5c7/0x7c0 [ 30.218173] do_vmi_munmap+0x1f1/0x2b0 [ 30.218667] mmap_region+0x1f9/0x2660 [ 30.219148] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.219657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.220357] ? __pfx_lock_acquire+0x10/0x10 [ 30.220894] ? __pfx_mmap_region+0x10/0x10 [ 30.221421] ? security_mmap_addr+0x7d/0xa0 [ 30.221948] ? get_unmapped_area+0x1f5/0x3f0 [ 30.222489] do_mmap+0x854/0xf00 [ 30.222922] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.223416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.223979] ksys_mmap_pgoff+0x3af/0x500 [ 30.224479] do_syscall_64+0x3f/0x90 [ 30.224967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.225605] RIP: 0033:0x7fb68a02ed82 [ 30.226053] 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 [ 30.228128] RSP: 002b:00007ffe3362f108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.229039] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb68a02ed82 [ 30.229864] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb689468000 [ 30.230704] RBP: 00007fb689468000 R08: 0000000000000009 R09: 0000000000001000 [ 30.231531] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559191578ec0 [ 30.232368] R13: 00007ffe3362f120 R14: 00007ffe3362f150 R15: 00007ffe3362f4b0 [ 30.233222] [ 30.233520] [ 30.233740] Allocated by task 213: [ 30.234170] kasan_save_stack+0x22/0x50 [ 30.234678] kasan_set_track+0x25/0x30 [ 30.235167] __kasan_slab_alloc+0x59/0x70 [ 30.235692] kmem_cache_alloc+0x16b/0x370 [ 30.236208] vm_area_dup+0x20/0x160 [ 30.236681] __split_vma+0x170/0x950 [ 30.237149] split_vma+0xc6/0x110 [ 30.237600] mprotect_fixup+0x8d2/0xb30 [ 30.238107] do_mprotect_pkey+0x87e/0xd40 [ 30.238633] __x64_sys_mprotect+0x78/0xc0 [ 30.239161] do_syscall_64+0x3f/0x90 [ 30.239641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.240291] [ 30.240505] Freed by task 0: [ 30.240896] kasan_save_stack+0x22/0x50 [ 30.241402] kasan_set_track+0x25/0x30 [ 30.241895] kasan_save_free_info+0x2b/0x50 [ 30.242424] __kasan_slab_free+0x10a/0x190 [ 30.242980] kmem_cache_free+0x10d/0x4d0 [ 30.243526] rcu_core+0x8c8/0x2860 [ 30.244012] __do_softirq+0x1b7/0x7d4 [ 30.244526] [ 30.244776] Last potentially related work creation: [ 30.245424] kasan_save_stack+0x22/0x50 [ 30.245973] __kasan_record_aux_stack+0x8e/0xa0 [ 30.246600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.247310] remove_vma+0x139/0x170 [ 30.247813] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.248430] do_vmi_munmap+0x1f1/0x2b0 [ 30.248957] __vm_munmap+0x138/0x3a0 [ 30.249467] __x64_sys_munmap+0x59/0x80 [ 30.250005] do_syscall_64+0x3f/0x90 [ 30.250523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.251240] [ 30.251484] The buggy address belongs to the object at ffff88800ef6f488 [ 30.251484] which belongs to the cache vm_area_struct of size 168 [ 30.253115] The buggy address is located 88 bytes inside of [ 30.253115] freed 168-byte region [ffff88800ef6f488, ffff88800ef6f530) [ 30.254665] [ 30.254900] The buggy address belongs to the physical page: [ 30.255640] page:0000000042b8fcbc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef6f [ 30.256857] memcg:ffff88800dc32601 [ 30.257330] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.258039] page_type: 0xffffffff() [ 30.258532] raw: 0100000000000200 ffff8880087a0c80 ffffea00003607c0 dead000000000008 [ 30.259536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc32601 [ 30.260535] page dumped because: kasan: bad access detected [ 30.261275] [ 30.261511] Memory state around the buggy address: [ 30.262156] ffff88800ef6f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.263094] ffff88800ef6f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.264051] >ffff88800ef6f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.265003] ^ [ 30.265834] ffff88800ef6f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.266791] ffff88800ef6f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.267738] ================================================================== [ 30.268978] Disabling lock debugging due to kernel taint [ 32.323370] BUG: Bad rss-counter state mm:0000000091a326d5 type:MM_FILEPAGES val:33 [ 32.324346] BUG: Bad rss-counter state mm:0000000091a326d5 type:MM_ANONPAGES val:22 [ 32.889269] BUG: Bad rss-counter state mm:00000000c56d7418 type:MM_FILEPAGES val:33 [ 32.890644] BUG: Bad rss-counter state mm:00000000c56d7418 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8662' (ECDSA) to the list of known hosts. 2023/06/21 07:33:48 fuzzer started 2023/06/21 07:33:48 dialing manager at localhost:36067 2023/06/21 07:33:48 checking machine... 2023/06/21 07:33:48 checking revisions... [ 33.541869] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:33:48 testing simple program... [ 33.593163] cgroup: Unknown subsys name 'net' [ 33.640680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:33:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff85d3d350 RSP=ffff8880147af5b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea00003b7a40 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff8180f086 RFL=00000012 [----A--] 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 00007f04ef9e7900 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=00007f04eedfb730 CR3=000000000c930000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=bf66c0e43535f12100000000000ae988 XMM05=d0e5f747085c04970000000000133270 XMM06=e4cb8bb95a7664b60000000000132108 XMM07=fb795ef6d65770560000000000122338 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff860a1444 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ff8 R15=ffff88806cf09a78 RIP=ffffffff81131171 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 00007f7b753e6900 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=00007ffc095fa000 CR3=000000001a32e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000