syzkaller login: [ 50.143270] BUG: Bad rss-counter state mm:00000000ceb9d380 type:MM_FILEPAGES val:33 [ 50.145022] BUG: Bad rss-counter state mm:00000000ceb9d380 type:MM_ANONPAGES val:22 [ 50.331627] ================================================================== [ 50.332816] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.334116] Read of size 8 at addr ffff88801452b228 by task sshd/218 [ 50.335421] [ 50.335774] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.337217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.338613] Call Trace: [ 50.339072] <TASK> [ 50.339484] dump_stack_lvl+0x91/0xf0 [ 50.340199] print_report+0xcc/0x620 [ 50.340889] ? __virt_addr_valid+0x102/0x340 [ 50.341642] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.342290] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.342916] kasan_report+0xbe/0xf0 [ 50.343427] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.344052] vma_interval_tree_remove+0xc75/0xec0 [ 50.344703] vma_prepare+0xc54/0x11a0 [ 50.345217] __split_vma+0x5af/0x950 [ 50.345700] ? __pfx___split_vma+0x10/0x10 [ 50.346278] ? find_held_lock+0x2c/0x110 [ 50.346810] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.347404] ? lock_is_held_type+0x9f/0x120 [ 50.347951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.348600] ? mtree_range_walk+0x632/0x900 [ 50.349178] ? mas_walk+0x5c7/0x7c0 [ 50.349662] do_vmi_munmap+0x1f1/0x2b0 [ 50.350206] mmap_region+0x1f9/0x2660 [ 50.350703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.351251] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.351979] ? __pfx_lock_acquire+0x10/0x10 [ 50.352574] ? __pfx_mmap_region+0x10/0x10 [ 50.353153] ? security_mmap_addr+0x7d/0xa0 [ 50.353721] ? get_unmapped_area+0x1f5/0x3f0 [ 50.354345] do_mmap+0x854/0xf00 [ 50.354810] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.355370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.355969] ksys_mmap_pgoff+0x3af/0x500 [ 50.356553] do_syscall_64+0x3f/0x90 [ 50.357064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.357766] RIP: 0033:0x7f2451780d82 [ 50.358285] 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 [ 50.360624] RSP: 002b:00007ffda9600bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.361617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2451780d82 [ 50.362540] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2450bba000 [ 50.363469] RBP: 00007f2450bba000 R08: 0000000000000009 R09: 0000000000001000 [ 50.364428] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c22bde2ec0 [ 50.365377] R13: 00007ffda9600c10 R14: 00007ffda9600c40 R15: 00007ffda9600fa0 [ 50.366378] </TASK> [ 50.366804] [ 50.367105] Allocated by task 211: [ 50.367698] kasan_save_stack+0x22/0x50 [ 50.368345] kasan_set_track+0x25/0x30 [ 50.368880] __kasan_slab_alloc+0x59/0x70 [ 50.369459] kmem_cache_alloc+0x16b/0x370 [ 50.370008] vm_area_dup+0x20/0x160 [ 50.370525] __split_vma+0x170/0x950 [ 50.371028] split_vma+0xc6/0x110 [ 50.371523] mprotect_fixup+0x8d2/0xb30 [ 50.372057] do_mprotect_pkey+0x87e/0xd40 [ 50.372643] __x64_sys_mprotect+0x78/0xc0 [ 50.373235] do_syscall_64+0x3f/0x90 [ 50.373751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.374457] [ 50.374685] Freed by task 211: [ 50.375120] kasan_save_stack+0x22/0x50 [ 50.375778] kasan_set_track+0x25/0x30 [ 50.376342] kasan_save_free_info+0x2b/0x50 [ 50.376909] __kasan_slab_free+0x10a/0x190 [ 50.377503] kmem_cache_free+0x10d/0x4d0 [ 50.378052] rcu_core+0x8c8/0x2860 [ 50.378548] __do_softirq+0x1b7/0x7d4 [ 50.379056] [ 50.379302] Last potentially related work creation: [ 50.379929] kasan_save_stack+0x22/0x50 [ 50.380490] __kasan_record_aux_stack+0x8e/0xa0 [ 50.381111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.381805] remove_vma+0x139/0x170 [ 50.382327] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.382921] do_vmi_munmap+0x1f1/0x2b0 [ 50.383463] __vm_munmap+0x138/0x3a0 [ 50.383959] __x64_sys_munmap+0x59/0x80 [ 50.384523] do_syscall_64+0x3f/0x90 [ 50.385032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.385727] [ 50.385955] The buggy address belongs to the object at ffff88801452b1d0 [ 50.385955] which belongs to the cache vm_area_struct of size 168 [ 50.387575] The buggy address is located 88 bytes inside of [ 50.387575] freed 168-byte region [ffff88801452b1d0, ffff88801452b278) [ 50.389110] [ 50.389348] The buggy address belongs to the physical page: [ 50.390052] page:000000008dcba953 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1452b [ 50.391250] memcg:ffff888014527301 [ 50.391705] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.392441] page_type: 0xffffffff() [ 50.392926] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.393929] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014527301 [ 50.394928] page dumped because: kasan: bad access detected [ 50.395653] [ 50.395887] Memory state around the buggy address: [ 50.396554] ffff88801452b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.397507] ffff88801452b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 50.398447] >ffff88801452b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 50.399385] ^ [ 50.399978] ffff88801452b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 50.400930] ffff88801452b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 50.401864] ================================================================== [ 50.402962] Disabling lock debugging due to kernel taint [ 52.417306] BUG: Bad rss-counter state mm:00000000baa179e6 type:MM_FILEPAGES val:33 [ 52.418497] BUG: Bad rss-counter state mm:00000000baa179e6 type:MM_ANONPAGES val:22 [ 52.949141] BUG: Bad rss-counter state mm:0000000028d4cdc0 type:MM_FILEPAGES val:33 [ 52.949799] BUG: Bad rss-counter state mm:0000000028d4cdc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30211' (ECDSA) to the list of known hosts. 2023/06/20 09:32:57 fuzzer started 2023/06/20 09:32:57 dialing manager at localhost:44161 2023/06/20 09:32:57 checking machine... 2023/06/20 09:32:57 checking revisions... [ 53.695615] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:32:58 testing simple program... [ 53.750920] cgroup: Unknown subsys name 'net' [ 53.803763] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:32:38 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff88800c7951c0 RSI=ffffffff83c6316a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801a2176a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000003e R11=000010fd000010fd R12=0000000000000000 R13=000000000000003e R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0800 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 00007f25ee397900 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=00007ffd23890000 CR3=000000000d90a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f1bdc689ee8 CR3=000000000cb70000 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=22fc38811e52748a8b456afbf1e30018 XMM02=2c67c8bc2e329bc300000000001209d0 XMM03=fb795ef6d65770560000000000124948 XMM04=eb12e4bdd511f7e400000000000ae988 XMM05=030fea0ebca1d4b500000000001349d8 XMM06=bdf2e299e47b49d50000000000134060 XMM07=e042d86d42eb936e0000000000124c20 XMM08=30f7e4160f4450480000000000120a30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000