syzkaller login: [ 110.602602] BUG: Bad rss-counter state mm:000000006b3889af type:MM_FILEPAGES val:33 [ 110.603602] BUG: Bad rss-counter state mm:000000006b3889af type:MM_ANONPAGES val:22 [ 110.776537] ================================================================== [ 110.777520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 110.778457] Read of size 8 at addr ffff88801589a310 by task sshd/220 [ 110.779326] [ 110.779542] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 110.780584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 110.781566] Call Trace: [ 110.781888] [ 110.782171] dump_stack_lvl+0x91/0xf0 [ 110.782661] print_report+0xcc/0x620 [ 110.783141] ? __virt_addr_valid+0x102/0x340 [ 110.783696] ? vma_interval_tree_remove+0xc75/0xec0 [ 110.784331] ? vma_interval_tree_remove+0xc75/0xec0 [ 110.784940] kasan_report+0xbe/0xf0 [ 110.785411] ? vma_interval_tree_remove+0xc75/0xec0 [ 110.786029] vma_interval_tree_remove+0xc75/0xec0 [ 110.786624] vma_prepare+0xc54/0x11a0 [ 110.787097] __split_vma+0x5af/0x950 [ 110.787568] ? __pfx___split_vma+0x10/0x10 [ 110.788095] ? find_held_lock+0x2c/0x110 [ 110.788630] do_vmi_align_munmap+0x2ba/0x11f0 [ 110.789195] ? lock_is_held_type+0x9f/0x120 [ 110.789737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 110.790344] ? mtree_range_walk+0x632/0x900 [ 110.790893] ? mas_walk+0x5c7/0x7c0 [ 110.791365] do_vmi_munmap+0x1f1/0x2b0 [ 110.791858] mmap_region+0x1f9/0x2660 [ 110.792344] ? vm_mmap_pgoff+0x15c/0x3a0 [ 110.792856] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 110.793566] ? __pfx_lock_acquire+0x10/0x10 [ 110.794093] ? __pfx_mmap_region+0x10/0x10 [ 110.794624] ? security_mmap_addr+0x7d/0xa0 [ 110.795156] ? get_unmapped_area+0x1f5/0x3f0 [ 110.795710] do_mmap+0x854/0xf00 [ 110.796167] vm_mmap_pgoff+0x1a6/0x3a0 [ 110.796661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 110.797220] ksys_mmap_pgoff+0x3af/0x500 [ 110.797730] do_syscall_64+0x3f/0x90 [ 110.798206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 110.798855] RIP: 0033:0x7efc3a4b4d82 [ 110.799311] 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 [ 110.801493] RSP: 002b:00007ffc6d4ffd88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 110.802436] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc3a4b4d82 [ 110.803327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc398ee000 [ 110.804225] RBP: 00007efc398ee000 R08: 0000000000000009 R09: 0000000000001000 [ 110.805115] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbf9298ec0 [ 110.806007] R13: 00007ffc6d4ffda0 R14: 00007ffc6d4ffdd0 R15: 00007ffc6d500130 [ 110.806906] [ 110.807211] [ 110.807439] Allocated by task 213: [ 110.807887] kasan_save_stack+0x22/0x50 [ 110.808429] kasan_set_track+0x25/0x30 [ 110.808919] __kasan_slab_alloc+0x59/0x70 [ 110.809446] kmem_cache_alloc+0x16b/0x370 [ 110.809961] vm_area_dup+0x20/0x160 [ 110.810411] __split_vma+0x170/0x950 [ 110.810875] split_vma+0xc6/0x110 [ 110.811316] mprotect_fixup+0x8d2/0xb30 [ 110.811815] do_mprotect_pkey+0x87e/0xd40 [ 110.812346] __x64_sys_mprotect+0x78/0xc0 [ 110.812867] do_syscall_64+0x3f/0x90 [ 110.813336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 110.813974] [ 110.814190] Freed by task 213: [ 110.814581] kasan_save_stack+0x22/0x50 [ 110.815081] kasan_set_track+0x25/0x30 [ 110.815586] kasan_save_free_info+0x2b/0x50 [ 110.816118] __kasan_slab_free+0x10a/0x190 [ 110.816671] kmem_cache_free+0x10d/0x4d0 [ 110.817177] rcu_core+0x8c8/0x2860 [ 110.817624] __do_softirq+0x1b7/0x7d4 [ 110.818099] [ 110.818319] Last potentially related work creation: [ 110.818906] kasan_save_stack+0x22/0x50 [ 110.819409] __kasan_record_aux_stack+0x8e/0xa0 [ 110.819986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 110.820637] remove_vma+0x139/0x170 [ 110.821088] do_vmi_align_munmap+0xd4a/0x11f0 [ 110.821653] do_vmi_munmap+0x1f1/0x2b0 [ 110.822138] __vm_munmap+0x138/0x3a0 [ 110.822602] __x64_sys_munmap+0x59/0x80 [ 110.823099] do_syscall_64+0x3f/0x90 [ 110.823569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 110.824215] [ 110.824431] The buggy address belongs to the object at ffff88801589a2b8 [ 110.824431] which belongs to the cache vm_area_struct of size 168 [ 110.825894] The buggy address is located 88 bytes inside of [ 110.825894] freed 168-byte region [ffff88801589a2b8, ffff88801589a360) [ 110.827291] [ 110.827508] The buggy address belongs to the physical page: [ 110.828183] page:00000000bc996089 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1589a [ 110.829273] memcg:ffff888019b69d01 [ 110.829698] flags: 0x100000000000200(slab|node=0|zone=1) [ 110.830338] page_type: 0xffffffff() [ 110.830786] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 110.831702] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b69d01 [ 110.832619] page dumped because: kasan: bad access detected [ 110.833276] [ 110.833490] Memory state around the buggy address: [ 110.834072] ffff88801589a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 110.834928] ffff88801589a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 110.835777] >ffff88801589a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 110.836642] ^ [ 110.837107] ffff88801589a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 110.837974] ffff88801589a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 110.838818] ================================================================== [ 110.839934] Disabling lock debugging due to kernel taint [ 112.628951] BUG: Bad rss-counter state mm:000000004f57a802 type:MM_FILEPAGES val:33 [ 112.629748] BUG: Bad rss-counter state mm:000000004f57a802 type:MM_ANONPAGES val:22 [ 113.105379] BUG: Bad rss-counter state mm:000000007300248a type:MM_FILEPAGES val:33 [ 113.106532] BUG: Bad rss-counter state mm:000000007300248a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7521' (ECDSA) to the list of known hosts. 2023/06/19 15:42:15 fuzzer started 2023/06/19 15:42:15 dialing manager at localhost:44161 2023/06/19 15:42:15 checking machine... 2023/06/19 15:42:15 checking revisions... [ 113.684065] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:42:15 testing simple program... [ 113.734762] cgroup: Unknown subsys name 'net' [ 113.776093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:40:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff8880199dc2e0 RIP=ffffffff814c0388 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 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=00007f8c43e8ce00 CR3=000000000f2b2000 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=e72074888701b4894042270d9332673f XMM02=0000000000126790eff9b2d0a8fce9cb XMM03=00000000001268602c67c8bc2e329bc3 XMM04=fea45712e44d5d8100000000000ae988 XMM05=6df97f87fbff2a2e000000000013d4d0 XMM06=4fda316b135da52b000000000013cec8 XMM07=e042d86d42eb936e000000000012d868 XMM08=656d50804dc2f8250000000000126860 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffffff0ba7c60 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000010 RSP=ffff888016077e18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000003 R13=0000000000000009 R14=ffff888019389140 R15=0000000000000000 RIP=ffffffff814c0384 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 00007f2eb4551900 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=00007ffe39372000 CR3=000000000e90a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000