syzkaller login: [ 48.322968] BUG: Bad rss-counter state mm:000000002fa7f269 type:MM_FILEPAGES val:33 [ 48.324173] BUG: Bad rss-counter state mm:000000002fa7f269 type:MM_ANONPAGES val:22 [ 48.364866] ================================================================== [ 48.366018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.367077] Read of size 8 at addr ffff88800dd69140 by task sshd/220 [ 48.367879] [ 48.368213] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.369196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.370195] Call Trace: [ 48.370520] [ 48.370845] dump_stack_lvl+0x91/0xf0 [ 48.371448] print_report+0xcc/0x620 [ 48.371953] ? __virt_addr_valid+0x102/0x340 [ 48.372622] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.373363] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.374063] kasan_report+0xbe/0xf0 [ 48.374550] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.375183] vma_interval_tree_remove+0xc75/0xec0 [ 48.375920] vma_prepare+0xc54/0x11a0 [ 48.376501] __split_vma+0x5af/0x950 [ 48.377028] ? __pfx___split_vma+0x10/0x10 [ 48.377581] ? find_held_lock+0x2c/0x110 [ 48.378122] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.378686] ? lock_is_held_type+0x9f/0x120 [ 48.379226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.379836] ? mtree_range_walk+0x632/0x900 [ 48.380395] ? mas_walk+0x5c7/0x7c0 [ 48.380874] do_vmi_munmap+0x1f1/0x2b0 [ 48.381382] mmap_region+0x1f9/0x2660 [ 48.381865] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.382384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.383106] ? __pfx_lock_acquire+0x10/0x10 [ 48.383643] ? __pfx_mmap_region+0x10/0x10 [ 48.384175] ? security_mmap_addr+0x7d/0xa0 [ 48.384709] ? get_unmapped_area+0x1f5/0x3f0 [ 48.385282] do_mmap+0x854/0xf00 [ 48.385732] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.386237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.386811] ksys_mmap_pgoff+0x3af/0x500 [ 48.387326] do_syscall_64+0x3f/0x90 [ 48.387803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.388452] RIP: 0033:0x7fa44f3c5d82 [ 48.388916] 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 [ 48.391088] RSP: 002b:00007fff929b98f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.392006] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa44f3c5d82 [ 48.392861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa44e7ff000 [ 48.393721] RBP: 00007fa44e7ff000 R08: 0000000000000009 R09: 0000000000001000 [ 48.394571] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf572ceec0 [ 48.395436] R13: 00007fff929b9910 R14: 00007fff929b9940 R15: 00007fff929b9ca0 [ 48.396288] [ 48.396582] [ 48.396803] Allocated by task 213: [ 48.397254] kasan_save_stack+0x22/0x50 [ 48.397771] kasan_set_track+0x25/0x30 [ 48.398262] __kasan_slab_alloc+0x59/0x70 [ 48.398792] kmem_cache_alloc+0x16b/0x370 [ 48.399311] vm_area_dup+0x20/0x160 [ 48.399776] __split_vma+0x170/0x950 [ 48.400240] split_vma+0xc6/0x110 [ 48.400684] mprotect_fixup+0x8d2/0xb30 [ 48.401208] do_mprotect_pkey+0x87e/0xd40 [ 48.401770] __x64_sys_mprotect+0x78/0xc0 [ 48.402291] do_syscall_64+0x3f/0x90 [ 48.402769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.403417] [ 48.403634] Freed by task 213: [ 48.404030] kasan_save_stack+0x22/0x50 [ 48.404534] kasan_set_track+0x25/0x30 [ 48.405032] kasan_save_free_info+0x2b/0x50 [ 48.405566] __kasan_slab_free+0x10a/0x190 [ 48.406099] kmem_cache_free+0x10d/0x4d0 [ 48.406609] rcu_core+0x8c8/0x2860 [ 48.407053] __do_softirq+0x1b7/0x7d4 [ 48.407526] [ 48.407746] Last potentially related work creation: [ 48.408339] kasan_save_stack+0x22/0x50 [ 48.408844] __kasan_record_aux_stack+0x8e/0xa0 [ 48.409480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.410253] remove_vma+0x139/0x170 [ 48.410706] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.411267] do_vmi_munmap+0x1f1/0x2b0 [ 48.411752] __vm_munmap+0x138/0x3a0 [ 48.412220] __x64_sys_munmap+0x59/0x80 [ 48.412722] do_syscall_64+0x3f/0x90 [ 48.413212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.413859] [ 48.414074] The buggy address belongs to the object at ffff88800dd690e8 [ 48.414074] which belongs to the cache vm_area_struct of size 168 [ 48.415549] The buggy address is located 88 bytes inside of [ 48.415549] freed 168-byte region [ffff88800dd690e8, ffff88800dd69190) [ 48.416952] [ 48.417189] The buggy address belongs to the physical page: [ 48.417850] page:000000005f3b6b80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd69 [ 48.418928] memcg:ffff88801821a301 [ 48.419354] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.419999] page_type: 0xffffffff() [ 48.420454] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.421383] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801821a301 [ 48.422288] page dumped because: kasan: bad access detected [ 48.422946] [ 48.423164] Memory state around the buggy address: [ 48.423747] ffff88800dd69000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.424600] ffff88800dd69080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 48.425466] >ffff88800dd69100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.426346] ^ [ 48.426988] ffff88800dd69180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 48.427851] ffff88800dd69200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 48.428705] ================================================================== [ 48.429673] Disabling lock debugging due to kernel taint [ 50.526487] BUG: Bad rss-counter state mm:00000000b4a10178 type:MM_FILEPAGES val:33 [ 50.527757] BUG: Bad rss-counter state mm:00000000b4a10178 type:MM_ANONPAGES val:22 [ 51.041524] BUG: Bad rss-counter state mm:000000000083f0a3 type:MM_FILEPAGES val:33 [ 51.042705] BUG: Bad rss-counter state mm:000000000083f0a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3487' (ECDSA) to the list of known hosts. 2023/06/19 21:07:12 fuzzer started 2023/06/19 21:07:12 dialing manager at localhost:44161 2023/06/19 21:07:12 checking machine... 2023/06/19 21:07:12 checking revisions... [ 51.723106] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:07:12 testing simple program... [ 51.782925] cgroup: Unknown subsys name 'net' [ 51.846677] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:06:54 Registers: info registers vcpu 0 RAX=00000000000000ec RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407e01 RSI=ffffffff85407ea0 RDI=ffffffff85407ea0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407ea0 R15=ffff88806ce09a98 RIP=ffffffff81131236 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=00007ffcf13e7638 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f35cbdbf510000055743585d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000008054c72a RBX=00000000b9a6a56a RCX=ffff88801460f80c RDX=000000000000000d RSI=0000000000000005 RDI=000000002ad694c4 RBP=0000000000000000 RSP=ffff88801460f750 R8 =000000008054c72a R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801460f7b8 R15=000000000000000d RIP=ffffffff82270ee0 RFL=00000a97 [-OS-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 00007f3b433d7900 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=00007ffee3345000 CR3=000000000cc22000 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