syzkaller login: [ 48.688205] BUG: Bad rss-counter state mm:00000000632f9342 type:MM_FILEPAGES val:33 [ 48.689396] BUG: Bad rss-counter state mm:00000000632f9342 type:MM_ANONPAGES val:22 [ 48.726342] ================================================================== [ 48.727349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.728301] Read of size 8 at addr ffff88800eded140 by task sshd/219 [ 48.729076] [ 48.729407] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.730285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.731283] Call Trace: [ 48.731611] [ 48.731895] dump_stack_lvl+0x91/0xf0 [ 48.732390] print_report+0xcc/0x620 [ 48.732874] ? __virt_addr_valid+0x102/0x340 [ 48.733427] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.734042] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.734688] kasan_report+0xbe/0xf0 [ 48.735176] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.735808] vma_interval_tree_remove+0xc75/0xec0 [ 48.736435] vma_prepare+0xc54/0x11a0 [ 48.736946] __split_vma+0x5af/0x950 [ 48.737458] ? __pfx___split_vma+0x10/0x10 [ 48.738014] ? find_held_lock+0x2c/0x110 [ 48.738569] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.739158] ? lock_is_held_type+0x9f/0x120 [ 48.739738] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.740392] ? mtree_range_walk+0x632/0x900 [ 48.740985] ? mas_walk+0x5c7/0x7c0 [ 48.741490] do_vmi_munmap+0x1f1/0x2b0 [ 48.742011] mmap_region+0x1f9/0x2660 [ 48.742524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.743077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.743852] ? __pfx_lock_acquire+0x10/0x10 [ 48.744411] ? __pfx_mmap_region+0x10/0x10 [ 48.744978] ? security_mmap_addr+0x7d/0xa0 [ 48.745553] ? get_unmapped_area+0x1f5/0x3f0 [ 48.746139] do_mmap+0x854/0xf00 [ 48.746620] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.747148] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.747746] ksys_mmap_pgoff+0x3af/0x500 [ 48.748304] do_syscall_64+0x3f/0x90 [ 48.748811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.749494] RIP: 0033:0x7f8adcd08d82 [ 48.749982] 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 [ 48.752264] RSP: 002b:00007ffde56cc758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.753238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8adcd08d82 [ 48.754142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8adc142000 [ 48.755035] RBP: 00007f8adc142000 R08: 0000000000000009 R09: 0000000000001000 [ 48.755949] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635c6aa0ec0 [ 48.756853] R13: 00007ffde56cc770 R14: 00007ffde56cc7a0 R15: 00007ffde56ccb00 [ 48.757772] [ 48.758091] [ 48.758322] Allocated by task 212: [ 48.758788] kasan_save_stack+0x22/0x50 [ 48.759329] kasan_set_track+0x25/0x30 [ 48.759856] __kasan_slab_alloc+0x59/0x70 [ 48.760403] kmem_cache_alloc+0x16b/0x370 [ 48.760919] vm_area_dup+0x20/0x160 [ 48.761390] __split_vma+0x170/0x950 [ 48.761856] split_vma+0xc6/0x110 [ 48.762299] mprotect_fixup+0x8d2/0xb30 [ 48.762808] do_mprotect_pkey+0x87e/0xd40 [ 48.763336] __x64_sys_mprotect+0x78/0xc0 [ 48.763863] do_syscall_64+0x3f/0x90 [ 48.764337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.764977] [ 48.765195] Freed by task 212: [ 48.765594] kasan_save_stack+0x22/0x50 [ 48.766102] kasan_set_track+0x25/0x30 [ 48.766622] kasan_save_free_info+0x2b/0x50 [ 48.767162] __kasan_slab_free+0x10a/0x190 [ 48.767702] kmem_cache_free+0x10d/0x4d0 [ 48.768210] rcu_core+0x8c8/0x2860 [ 48.768659] __do_softirq+0x1b7/0x7d4 [ 48.769129] [ 48.769345] Last potentially related work creation: [ 48.769947] kasan_save_stack+0x22/0x50 [ 48.770457] __kasan_record_aux_stack+0x8e/0xa0 [ 48.771051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.771688] remove_vma+0x139/0x170 [ 48.772147] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.772718] do_vmi_munmap+0x1f1/0x2b0 [ 48.773209] __vm_munmap+0x138/0x3a0 [ 48.773683] __x64_sys_munmap+0x59/0x80 [ 48.774191] do_syscall_64+0x3f/0x90 [ 48.774679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.775318] [ 48.775532] Second to last potentially related work creation: [ 48.776221] kasan_save_stack+0x22/0x50 [ 48.776727] __kasan_record_aux_stack+0x8e/0xa0 [ 48.777315] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.777962] remove_vma+0x139/0x170 [ 48.778427] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.779003] do_vmi_munmap+0x1f1/0x2b0 [ 48.779495] __vm_munmap+0x138/0x3a0 [ 48.779964] __x64_sys_munmap+0x59/0x80 [ 48.780466] do_syscall_64+0x3f/0x90 [ 48.780939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.781589] [ 48.781809] The buggy address belongs to the object at ffff88800eded0e8 [ 48.781809] which belongs to the cache vm_area_struct of size 168 [ 48.783300] The buggy address is located 88 bytes inside of [ 48.783300] freed 168-byte region [ffff88800eded0e8, ffff88800eded190) [ 48.784808] [ 48.785035] The buggy address belongs to the physical page: [ 48.785739] page:0000000050cc5752 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeded [ 48.786926] memcg:ffff88800e91bc01 [ 48.787384] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.788075] page_type: 0xffffffff() [ 48.788558] raw: 0100000000000200 ffff88800879fc80 ffffea00003bef40 dead000000000004 [ 48.789534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e91bc01 [ 48.790525] page dumped because: kasan: bad access detected [ 48.791228] [ 48.791457] Memory state around the buggy address: [ 48.792083] ffff88800eded000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.792996] ffff88800eded080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 48.793925] >ffff88800eded100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.794859] ^ [ 48.795544] ffff88800eded180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 48.796476] ffff88800eded200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 48.797382] ================================================================== [ 48.798541] Disabling lock debugging due to kernel taint [ 50.827211] BUG: Bad rss-counter state mm:000000004f44e350 type:MM_FILEPAGES val:33 [ 50.828347] BUG: Bad rss-counter state mm:000000004f44e350 type:MM_ANONPAGES val:22 [ 51.291204] BUG: Bad rss-counter state mm:000000000155f075 type:MM_FILEPAGES val:33 [ 51.292231] BUG: Bad rss-counter state mm:000000000155f075 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34165' (ECDSA) to the list of known hosts. 2023/06/19 22:10:34 fuzzer started 2023/06/19 22:10:34 dialing manager at localhost:44161 2023/06/19 22:10:34 checking machine... 2023/06/19 22:10:34 checking revisions... [ 51.918651] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:10:34 testing simple program... [ 51.960661] cgroup: Unknown subsys name 'net' [ 52.006524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:10:24 Registers: info registers vcpu 0 RAX=00000000067d0115 RBX=ffffed1001fb3f29 RCX=1143d50e85cca200 RDX=dffffc0000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=0000000000000280 RSP=ffff88800fd9f948 R8 =00000000d1f07a0d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888018db6100 R13=0000000000000000 R14=ffff88800e4b43d8 R15=ffff88800e4b4390 RIP=ffffffff81846047 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 00007fe47e9c8900 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=00007ffdf0a88000 CR3=000000000da42000 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=ffff888008c58400 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=00007fbdec108f10 CR3=000000000c9e2000 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=4082b0448e830b88cc4cff8252946566 XMM02=000000000011ddd8ec2efd57dc4c00df XMM03=0000000000123fe088e56966037ce528 XMM04=2ede2b321ddff6ba00000000000ae988 XMM05=dfcdbad4f1609c370000000000134880 XMM06=6f48413bfee8413d0000000000133a58 XMM07=e042d86d42eb936e0000000000124260 XMM08=88e56966037ce528000000000011de38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000