syzkaller login: [ 60.576243] BUG: Bad rss-counter state mm:000000000007b528 type:MM_FILEPAGES val:33 [ 60.577392] BUG: Bad rss-counter state mm:000000000007b528 type:MM_ANONPAGES val:22 [ 60.752425] ================================================================== [ 60.753468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.754565] Read of size 8 at addr ffff88800d48c798 by task sshd/229 [ 60.755538] [ 60.755787] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.756771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.757896] Call Trace: [ 60.758277] [ 60.758603] dump_stack_lvl+0x91/0xf0 [ 60.759171] print_report+0xcc/0x620 [ 60.759729] ? __virt_addr_valid+0x102/0x340 [ 60.760361] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.761066] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.761777] kasan_report+0xbe/0xf0 [ 60.762335] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.763040] vma_interval_tree_remove+0xc75/0xec0 [ 60.763724] vma_prepare+0xc54/0x11a0 [ 60.764274] __split_vma+0x5af/0x950 [ 60.764818] ? __pfx___split_vma+0x10/0x10 [ 60.765425] ? find_held_lock+0x2c/0x110 [ 60.766048] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.766699] ? lock_is_held_type+0x9f/0x120 [ 60.767329] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.768031] ? mtree_range_walk+0x632/0x900 [ 60.768675] ? mas_walk+0x5c7/0x7c0 [ 60.769221] do_vmi_munmap+0x1f1/0x2b0 [ 60.769788] mmap_region+0x1f9/0x2660 [ 60.770354] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.770946] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.771767] ? __pfx_lock_acquire+0x10/0x10 [ 60.772491] ? __pfx_mmap_region+0x10/0x10 [ 60.773173] ? security_mmap_addr+0x7d/0xa0 [ 60.773878] ? get_unmapped_area+0x1f5/0x3f0 [ 60.774549] do_mmap+0x854/0xf00 [ 60.775063] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.775639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.776294] ksys_mmap_pgoff+0x3af/0x500 [ 60.776869] do_syscall_64+0x3f/0x90 [ 60.777447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.778339] RIP: 0033:0x7f372a448d82 [ 60.778953] 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 [ 60.781620] RSP: 002b:00007fff186c8f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.782720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f372a448d82 [ 60.783698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3729882000 [ 60.784657] RBP: 00007f3729882000 R08: 0000000000000009 R09: 0000000000001000 [ 60.785613] R10: 0000000000000812 R11: 0000000000000206 R12: 000055786ff94ec0 [ 60.786591] R13: 00007fff186c8fa0 R14: 00007fff186c8fd0 R15: 00007fff186c9330 [ 60.787674] [ 60.787997] [ 60.788234] Allocated by task 222: [ 60.788697] kasan_save_stack+0x22/0x50 [ 60.789248] kasan_set_track+0x25/0x30 [ 60.789784] __kasan_slab_alloc+0x59/0x70 [ 60.790400] kmem_cache_alloc+0x16b/0x370 [ 60.791053] vm_area_dup+0x20/0x160 [ 60.791569] __split_vma+0x170/0x950 [ 60.792098] split_vma+0xc6/0x110 [ 60.792599] mprotect_fixup+0x8d2/0xb30 [ 60.793262] do_mprotect_pkey+0x87e/0xd40 [ 60.794028] __x64_sys_mprotect+0x78/0xc0 [ 60.794756] do_syscall_64+0x3f/0x90 [ 60.795401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.796295] [ 60.796581] Freed by task 222: [ 60.797097] kasan_save_stack+0x22/0x50 [ 60.797738] kasan_set_track+0x25/0x30 [ 60.798308] kasan_save_free_info+0x2b/0x50 [ 60.798962] __kasan_slab_free+0x10a/0x190 [ 60.799694] kmem_cache_free+0x10d/0x4d0 [ 60.800381] rcu_core+0x8c8/0x2860 [ 60.800984] __do_softirq+0x1b7/0x7d4 [ 60.801547] [ 60.801789] Last potentially related work creation: [ 60.802436] kasan_save_stack+0x22/0x50 [ 60.802985] __kasan_record_aux_stack+0x8e/0xa0 [ 60.803594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.804402] remove_vma+0x139/0x170 [ 60.804910] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.805509] do_vmi_munmap+0x1f1/0x2b0 [ 60.806134] __vm_munmap+0x138/0x3a0 [ 60.806684] __x64_sys_munmap+0x59/0x80 [ 60.807219] do_syscall_64+0x3f/0x90 [ 60.807735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.808517] [ 60.808808] The buggy address belongs to the object at ffff88800d48c740 [ 60.808808] which belongs to the cache vm_area_struct of size 168 [ 60.810598] The buggy address is located 88 bytes inside of [ 60.810598] freed 168-byte region [ffff88800d48c740, ffff88800d48c7e8) [ 60.812166] [ 60.812402] The buggy address belongs to the physical page: [ 60.813134] page:000000005bb17a03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd48c [ 60.814452] memcg:ffff88800eae4401 [ 60.814955] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.815684] page_type: 0xffffffff() [ 60.816179] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.817245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eae4401 [ 60.818316] page dumped because: kasan: bad access detected [ 60.819086] [ 60.819336] Memory state around the buggy address: [ 60.820009] ffff88800d48c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.821004] ffff88800d48c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.822026] >ffff88800d48c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.823430] ^ [ 60.824192] ffff88800d48c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.825522] ffff88800d48c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.826837] ================================================================== [ 60.828047] Disabling lock debugging due to kernel taint [ 63.211684] BUG: Bad rss-counter state mm:000000000c462063 type:MM_FILEPAGES val:33 [ 63.212651] BUG: Bad rss-counter state mm:000000000c462063 type:MM_ANONPAGES val:22 [ 63.701387] BUG: Bad rss-counter state mm:000000009c73ec1f type:MM_FILEPAGES val:33 [ 63.702422] BUG: Bad rss-counter state mm:000000009c73ec1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21872' (ECDSA) to the list of known hosts. 2023/06/21 05:01:46 fuzzer started 2023/06/21 05:01:47 dialing manager at localhost:36067 2023/06/21 05:01:47 checking machine... 2023/06/21 05:01:47 checking revisions... [ 64.443236] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:01:47 testing simple program... [ 64.484253] cgroup: Unknown subsys name 'net' [ 64.516719] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:01:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019a7f848 RCX=ffffffff863b4b9e RDX=1ffff1100334ff09 RSI=ffff888019a7fd48 RDI=ffff888019a7f848 RBP=ffff888019a7fd48 RSP=ffff888019a7f7a0 R8 =ffffffff863b4ba2 R9 =ffff888019a7f888 R10=0000000000038001 R11=000000000008ad19 R12=0000000000000008 R13=ffff888019a7f890 R14=ffff888019a7fd50 R15=ffff888019a7f848 RIP=ffffffff8113041a RFL=00000286 [--S--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 00007fd5f9278900 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=00007fd5f982f618 CR3=0000000009678000 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=00000000063d011d RBX=ffff88800e700480 RCX=ffff88800e700000 RDX=0000000000000080 RSI=ffff88800e700390 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88806cf09dc0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=ffff88800844f780 R13=ffffea0000591600 R14=ffffffff813782f8 R15=ffff88800e469580 RIP=ffffffff8180eff0 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 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=00007fd5f98300b0 CR3=00000000162e2000 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=2036343a31303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31303a3530203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000