syzkaller login: [ 32.055156] BUG: Bad rss-counter state mm:00000000d5030cce type:MM_FILEPAGES val:33 [ 32.056001] BUG: Bad rss-counter state mm:00000000d5030cce type:MM_ANONPAGES val:22 [ 32.085174] ================================================================== [ 32.085997] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.086612] Read of size 8 at addr ffff88800c5f3c20 by task sshd/220 [ 32.087115] [ 32.087254] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.087867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.088514] Call Trace: [ 32.088736] [ 32.088934] dump_stack_lvl+0x91/0xf0 [ 32.089271] print_report+0xcc/0x620 [ 32.089606] ? __virt_addr_valid+0x102/0x340 [ 32.089993] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.090415] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.090837] kasan_report+0xbe/0xf0 [ 32.091169] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.091587] vma_interval_tree_remove+0xc75/0xec0 [ 32.092034] vma_prepare+0xc54/0x11a0 [ 32.092362] __split_vma+0x5af/0x950 [ 32.092674] ? __pfx___split_vma+0x10/0x10 [ 32.093031] ? find_held_lock+0x2c/0x110 [ 32.093385] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.093760] ? lock_is_held_type+0x9f/0x120 [ 32.094131] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.094532] ? mtree_range_walk+0x632/0x900 [ 32.094888] ? mas_walk+0x5c7/0x7c0 [ 32.095194] do_vmi_munmap+0x1f1/0x2b0 [ 32.095547] mmap_region+0x1f9/0x2660 [ 32.095932] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.096297] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.096799] ? __pfx_lock_acquire+0x10/0x10 [ 32.097182] ? __pfx_mmap_region+0x10/0x10 [ 32.097555] ? security_mmap_addr+0x7d/0xa0 [ 32.098204] ? get_unmapped_area+0x1f5/0x3f0 [ 32.098570] do_mmap+0x854/0xf00 [ 32.098889] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.099259] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.099662] ksys_mmap_pgoff+0x3af/0x500 [ 32.100102] do_syscall_64+0x3f/0x90 [ 32.100415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.100841] RIP: 0033:0x7fdfbd8b8d82 [ 32.101168] 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 [ 32.102553] RSP: 002b:00007ffdccccb6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.103184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfbd8b8d82 [ 32.103787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfbccf2000 [ 32.104364] RBP: 00007fdfbccf2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.104966] R10: 0000000000000812 R11: 0000000000000206 R12: 000056373607dec0 [ 32.105548] R13: 00007ffdccccb6d0 R14: 00007ffdccccb700 R15: 00007ffdccccba60 [ 32.106140] [ 32.106339] [ 32.106489] Allocated by task 213: [ 32.106785] kasan_save_stack+0x22/0x50 [ 32.107151] kasan_set_track+0x25/0x30 [ 32.107488] __kasan_slab_alloc+0x59/0x70 [ 32.107902] kmem_cache_alloc+0x16b/0x370 [ 32.108256] vm_area_dup+0x20/0x160 [ 32.108560] __split_vma+0x170/0x950 [ 32.108879] split_vma+0xc6/0x110 [ 32.109192] mprotect_fixup+0x8d2/0xb30 [ 32.109529] do_mprotect_pkey+0x87e/0xd40 [ 32.109867] __x64_sys_mprotect+0x78/0xc0 [ 32.110197] do_syscall_64+0x3f/0x90 [ 32.110528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.111000] [ 32.111155] Freed by task 213: [ 32.111435] kasan_save_stack+0x22/0x50 [ 32.111844] kasan_set_track+0x25/0x30 [ 32.112191] kasan_save_free_info+0x2b/0x50 [ 32.112563] __kasan_slab_free+0x10a/0x190 [ 32.112950] kmem_cache_free+0x10d/0x4d0 [ 32.113298] rcu_core+0x8c8/0x2860 [ 32.113609] __do_softirq+0x1b7/0x7d4 [ 32.113957] [ 32.114102] Last potentially related work creation: [ 32.114484] kasan_save_stack+0x22/0x50 [ 32.114794] __kasan_record_aux_stack+0x8e/0xa0 [ 32.115197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.115595] remove_vma+0x139/0x170 [ 32.115965] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.116318] do_vmi_munmap+0x1f1/0x2b0 [ 32.116628] __vm_munmap+0x138/0x3a0 [ 32.116944] __x64_sys_munmap+0x59/0x80 [ 32.117283] do_syscall_64+0x3f/0x90 [ 32.117582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.118017] [ 32.118164] The buggy address belongs to the object at ffff88800c5f3bc8 [ 32.118164] which belongs to the cache vm_area_struct of size 168 [ 32.119138] The buggy address is located 88 bytes inside of [ 32.119138] freed 168-byte region [ffff88800c5f3bc8, ffff88800c5f3c70) [ 32.120128] [ 32.120267] The buggy address belongs to the physical page: [ 32.120701] page:00000000b888e8ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5f3 [ 32.121421] memcg:ffff88800f1e8401 [ 32.121703] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.122134] page_type: 0xffffffff() [ 32.122422] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.123025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1e8401 [ 32.123626] page dumped because: kasan: bad access detected [ 32.124092] [ 32.124231] Memory state around the buggy address: [ 32.124614] ffff88800c5f3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.125179] ffff88800c5f3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.125753] >ffff88800c5f3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.126323] ^ [ 32.126678] ffff88800c5f3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.127274] ffff88800c5f3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.127890] ================================================================== [ 32.128598] Disabling lock debugging due to kernel taint [ 33.811754] BUG: Bad rss-counter state mm:000000008f093ad6 type:MM_FILEPAGES val:33 [ 33.812447] BUG: Bad rss-counter state mm:000000008f093ad6 type:MM_ANONPAGES val:22 [ 34.175909] BUG: Bad rss-counter state mm:0000000054b9eafe type:MM_FILEPAGES val:33 [ 34.176606] BUG: Bad rss-counter state mm:0000000054b9eafe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5421' (ECDSA) to the list of known hosts. 2023/06/20 09:48:38 fuzzer started 2023/06/20 09:48:39 dialing manager at localhost:44161 2023/06/20 09:48:39 checking machine... 2023/06/20 09:48:39 checking revisions... [ 34.728168] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:48:39 testing simple program... [ 34.762818] cgroup: Unknown subsys name 'net' [ 34.794315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:48:38 Registers: info registers vcpu 0 RAX=ffffffff8180c8da RBX=ffffffff813ad420 RCX=ffffffff86137d01 RDX=1ffff110011aff3a RSI=ffffffff8180c8da RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =ffffffff86137dd6 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020f00 R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff888019e41080 RIP=ffffffff84532440 RFL=00000282 [--S----] 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=00007fd1cb613618 CR3=000000000f754000 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=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 info registers vcpu 1 RAX=ffff88800b624e60 RBX=ffff888008e57dc8 RCX=1ffff110016c49cc RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff888008e57dd8 RBP=0000000000000006 RSP=ffff888008e57d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008e57dc8 R14=ffff88806cf35000 R15=ffff88801ba01c70 RIP=ffffffff8137fc84 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 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=00007fcafad79be0 CR3=000000000d848000 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=3147aa8211e48aa2ff4da0dad49a9b03 XMM02=000000000011e770ec2efd57dc4c00df XMM03=0000000000125570fbb1cc7ca27d83ca XMM04=5e63fede06fe201700000000000ae988 XMM05=19e9129bd510f2350000000000135048 XMM06=37d4d5f1ee5b446d0000000000133e78 XMM07=e042d86d42eb936e00000000001257f0 XMM08=fbb1cc7ca27d83ca000000000011e7d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000