syzkaller login: [ 62.792109] BUG: Bad rss-counter state mm:00000000f96eaad7 type:MM_FILEPAGES val:33 [ 62.793532] BUG: Bad rss-counter state mm:00000000f96eaad7 type:MM_ANONPAGES val:22 [ 62.947593] ================================================================== [ 62.948549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.949509] Read of size 8 at addr ffff88800d697c20 by task sshd/219 [ 62.950393] [ 62.950626] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 62.951679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.952698] Call Trace: [ 62.953026] [ 62.953316] dump_stack_lvl+0x91/0xf0 [ 62.953848] print_report+0xcc/0x620 [ 62.954336] ? __virt_addr_valid+0x102/0x340 [ 62.954898] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.955540] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.956174] kasan_report+0xbe/0xf0 [ 62.956664] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.957292] vma_interval_tree_remove+0xc75/0xec0 [ 62.957916] vma_prepare+0xc54/0x11a0 [ 62.958402] __split_vma+0x5af/0x950 [ 62.958884] ? __pfx___split_vma+0x10/0x10 [ 62.959416] ? find_held_lock+0x2c/0x110 [ 62.959948] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.960522] ? lock_is_held_type+0x9f/0x120 [ 62.961072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.961699] ? mtree_range_walk+0x632/0x900 [ 62.962256] ? mas_walk+0x5c7/0x7c0 [ 62.962734] do_vmi_munmap+0x1f1/0x2b0 [ 62.963236] mmap_region+0x1f9/0x2660 [ 62.963729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.964259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.964996] ? __pfx_lock_acquire+0x10/0x10 [ 62.965541] ? __pfx_mmap_region+0x10/0x10 [ 62.966103] ? security_mmap_addr+0x7d/0xa0 [ 62.966646] ? get_unmapped_area+0x1f5/0x3f0 [ 62.967230] do_mmap+0x854/0xf00 [ 62.967677] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.968176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.968753] ksys_mmap_pgoff+0x3af/0x500 [ 62.969298] do_syscall_64+0x3f/0x90 [ 62.969813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.970498] RIP: 0033:0x7fdb00df4d82 [ 62.970986] 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 [ 62.973262] RSP: 002b:00007fff8b741ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.974236] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb00df4d82 [ 62.975142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb0022e000 [ 62.976041] RBP: 00007fdb0022e000 R08: 0000000000000009 R09: 0000000000001000 [ 62.976936] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630c3afb980 [ 62.977852] R13: 00007fff8b741f00 R14: 00007fff8b741f30 R15: 00007fff8b742290 [ 62.978758] [ 62.979069] [ 62.979291] Allocated by task 212: [ 62.979746] kasan_save_stack+0x22/0x50 [ 62.980284] kasan_set_track+0x25/0x30 [ 62.980808] __kasan_slab_alloc+0x59/0x70 [ 62.981361] kmem_cache_alloc+0x16b/0x370 [ 62.981925] vm_area_dup+0x20/0x160 [ 62.982411] __split_vma+0x170/0x950 [ 62.982909] split_vma+0xc6/0x110 [ 62.983374] mprotect_fixup+0x8d2/0xb30 [ 62.983907] do_mprotect_pkey+0x87e/0xd40 [ 62.984464] __x64_sys_mprotect+0x78/0xc0 [ 62.985018] do_syscall_64+0x3f/0x90 [ 62.985524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.986222] [ 62.986448] Freed by task 212: [ 62.986860] kasan_save_stack+0x22/0x50 [ 62.987385] kasan_set_track+0x25/0x30 [ 62.987907] kasan_save_free_info+0x2b/0x50 [ 62.988477] __kasan_slab_free+0x10a/0x190 [ 62.989048] kmem_cache_free+0x10d/0x4d0 [ 62.989586] rcu_core+0x8c8/0x2860 [ 62.990063] __do_softirq+0x1b7/0x7d4 [ 62.990567] [ 62.990791] Last potentially related work creation: [ 62.991416] kasan_save_stack+0x22/0x50 [ 62.991955] __kasan_record_aux_stack+0x8e/0xa0 [ 62.992562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.993245] remove_vma+0x139/0x170 [ 62.993729] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.994323] do_vmi_munmap+0x1f1/0x2b0 [ 62.994837] __vm_munmap+0x138/0x3a0 [ 62.995328] __x64_sys_munmap+0x59/0x80 [ 62.995860] do_syscall_64+0x3f/0x90 [ 62.996368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.997042] [ 62.997270] The buggy address belongs to the object at ffff88800d697bc8 [ 62.997270] which belongs to the cache vm_area_struct of size 168 [ 62.998847] The buggy address is located 88 bytes inside of [ 62.998847] freed 168-byte region [ffff88800d697bc8, ffff88800d697c70) [ 63.000329] [ 63.000556] The buggy address belongs to the physical page: [ 63.001260] page:00000000c4b39764 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd697 [ 63.002437] memcg:ffff88800efaa101 [ 63.002896] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 63.003641] page_type: 0xffffffff() [ 63.004116] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 63.005083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efaa101 [ 63.006069] page dumped because: kasan: bad access detected [ 63.006772] [ 63.006997] Memory state around the buggy address: [ 63.007629] ffff88800d697b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.008535] ffff88800d697b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 63.009441] >ffff88800d697c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 63.010330] ^ [ 63.010866] ffff88800d697c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 63.011734] ffff88800d697d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 63.012600] ================================================================== [ 63.013640] Disabling lock debugging due to kernel taint [ 64.957292] BUG: Bad rss-counter state mm:000000004316d2f5 type:MM_FILEPAGES val:33 [ 64.958339] BUG: Bad rss-counter state mm:000000004316d2f5 type:MM_ANONPAGES val:22 [ 65.445025] BUG: Bad rss-counter state mm:00000000db13683c type:MM_FILEPAGES val:33 [ 65.445969] BUG: Bad rss-counter state mm:00000000db13683c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18067' (ECDSA) to the list of known hosts. 2023/06/19 19:29:05 fuzzer started 2023/06/19 19:29:05 dialing manager at localhost:44161 2023/06/19 19:29:05 checking machine... 2023/06/19 19:29:05 checking revisions... [ 66.166696] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:29:05 testing simple program... [ 66.212433] cgroup: Unknown subsys name 'net' [ 66.269328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:28:33 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09940 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800cd74ec0 RIP=ffffffff8180f004 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=00007fb8918d1420 CR3=000000000f5f2000 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=588aecf86f31f1b26746d85b8ce1ef90 XMM02=0000000000126730ec2efd57dc4c00df XMM03=000000000012dea035d1e0fc6c4c1da1 XMM04=3734c251fba7a69e00000000000ae988 XMM05=27d6f7dba5d5cbd5000000000013e680 XMM06=806171799158d967000000000013d720 XMM07=e042d86d42eb936e000000000012e120 XMM08=35d1e0fc6c4c1da10000000000126790 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc12c5 RBX=ffffffff85e09628 RCX=ffffffff818c86c0 RDX=0000000000000009 RSI=ffffffff8614a732 RDI=ffffffff85e09618 RBP=ffffffff85e09618 RSP=ffff8880180ff7c0 R8 =ffffffff8614a732 R9 =ffff8880180ff8b8 R10=0000000000038001 R11=0000000000024091 R12=ffffffff85e0963c R13=ffffffff85e09618 R14=ffffffff85e09618 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007fae5acda900 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=00007ffc0cbee000 CR3=00000000090c6000 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=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