syzkaller login: [ 34.809528] BUG: Bad rss-counter state mm:00000000572e9b94 type:MM_FILEPAGES val:33 [ 34.811553] BUG: Bad rss-counter state mm:00000000572e9b94 type:MM_ANONPAGES val:22 [ 34.953677] ================================================================== [ 34.954741] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.955842] Read of size 8 at addr ffff888014607880 by task sshd/220 [ 34.956967] [ 34.957232] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.958255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.959430] Call Trace: [ 34.959806] [ 34.960108] dump_stack_lvl+0x91/0xf0 [ 34.960602] print_report+0xcc/0x620 [ 34.961106] ? __virt_addr_valid+0x102/0x340 [ 34.961659] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.962278] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.962894] kasan_report+0xbe/0xf0 [ 34.963365] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.963983] vma_interval_tree_remove+0xc75/0xec0 [ 34.964579] vma_prepare+0xc54/0x11a0 [ 34.965067] __split_vma+0x5af/0x950 [ 34.965537] ? __pfx___split_vma+0x10/0x10 [ 34.966060] ? find_held_lock+0x2c/0x110 [ 34.966581] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.967139] ? lock_is_held_type+0x9f/0x120 [ 34.967667] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.968271] ? mtree_range_walk+0x632/0x900 [ 34.968840] ? mas_walk+0x5c7/0x7c0 [ 34.969315] do_vmi_munmap+0x1f1/0x2b0 [ 34.969800] mmap_region+0x1f9/0x2660 [ 34.970283] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.970793] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.971505] ? __pfx_lock_acquire+0x10/0x10 [ 34.972037] ? __pfx_mmap_region+0x10/0x10 [ 34.972561] ? security_mmap_addr+0x7d/0xa0 [ 34.973093] ? get_unmapped_area+0x1f5/0x3f0 [ 34.973644] do_mmap+0x854/0xf00 [ 34.974078] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.974574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.975160] ksys_mmap_pgoff+0x3af/0x500 [ 34.975688] do_syscall_64+0x3f/0x90 [ 34.976163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.976825] RIP: 0033:0x7f5b40d3fd82 [ 34.977303] 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 [ 34.979472] RSP: 002b:00007ffcef15d9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.980385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b40d3fd82 [ 34.981246] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b40179000 [ 34.982103] RBP: 00007f5b40179000 R08: 0000000000000009 R09: 0000000000001000 [ 34.982949] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564971f29d90 [ 34.983808] R13: 00007ffcef15d9c0 R14: 00007ffcef15d9f0 R15: 00007ffcef15dd50 [ 34.984678] [ 34.984993] [ 34.985211] Allocated by task 212: [ 34.985641] kasan_save_stack+0x22/0x50 [ 34.986144] kasan_set_track+0x25/0x30 [ 34.986639] __kasan_slab_alloc+0x59/0x70 [ 34.987174] kmem_cache_alloc+0x16b/0x370 [ 34.987696] vm_area_dup+0x20/0x160 [ 34.988158] __split_vma+0x170/0x950 [ 34.988632] split_vma+0xc6/0x110 [ 34.989072] mprotect_fixup+0x8d2/0xb30 [ 34.989583] do_mprotect_pkey+0x87e/0xd40 [ 34.990112] __x64_sys_mprotect+0x78/0xc0 [ 34.990638] do_syscall_64+0x3f/0x90 [ 34.991112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.991757] [ 34.991975] Freed by task 212: [ 34.992371] kasan_save_stack+0x22/0x50 [ 34.992883] kasan_set_track+0x25/0x30 [ 34.993382] kasan_save_free_info+0x2b/0x50 [ 34.993920] __kasan_slab_free+0x10a/0x190 [ 34.994462] kmem_cache_free+0x10d/0x4d0 [ 34.994969] rcu_core+0x8c8/0x2860 [ 34.995420] __do_softirq+0x1b7/0x7d4 [ 34.995896] [ 34.996114] Last potentially related work creation: [ 34.996709] kasan_save_stack+0x22/0x50 [ 34.997227] __kasan_record_aux_stack+0x8e/0xa0 [ 34.997854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.998504] remove_vma+0x139/0x170 [ 34.998956] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.999513] do_vmi_munmap+0x1f1/0x2b0 [ 34.999998] __vm_munmap+0x138/0x3a0 [ 35.000468] __x64_sys_munmap+0x59/0x80 [ 35.000975] do_syscall_64+0x3f/0x90 [ 35.001451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.002095] [ 35.002314] The buggy address belongs to the object at ffff888014607828 [ 35.002314] which belongs to the cache vm_area_struct of size 168 [ 35.003799] The buggy address is located 88 bytes inside of [ 35.003799] freed 168-byte region [ffff888014607828, ffff8880146078d0) [ 35.005228] [ 35.005447] The buggy address belongs to the physical page: [ 35.006114] page:000000007dda8358 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14607 [ 35.007220] memcg:ffff8880199d7301 [ 35.007648] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.008302] page_type: 0xffffffff() [ 35.008755] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.009705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199d7301 [ 35.010620] page dumped because: kasan: bad access detected [ 35.011287] [ 35.011503] Memory state around the buggy address: [ 35.012088] ffff888014607780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.012957] ffff888014607800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.013818] >ffff888014607880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.014674] ^ [ 35.015092] ffff888014607900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.015959] ffff888014607980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.016829] ================================================================== [ 35.017843] Disabling lock debugging due to kernel taint [ 37.388180] BUG: Bad rss-counter state mm:0000000075fa9050 type:MM_FILEPAGES val:33 [ 37.389432] BUG: Bad rss-counter state mm:0000000075fa9050 type:MM_ANONPAGES val:22 [ 37.870569] BUG: Bad rss-counter state mm:000000009c590c77 type:MM_FILEPAGES val:33 [ 37.871945] BUG: Bad rss-counter state mm:000000009c590c77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38555' (ECDSA) to the list of known hosts. 2023/06/19 14:40:29 fuzzer started 2023/06/19 14:40:29 dialing manager at localhost:44161 2023/06/19 14:40:29 checking machine... 2023/06/19 14:40:29 checking revisions... [ 38.601502] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:40:29 testing simple program... [ 38.641728] cgroup: Unknown subsys name 'net' [ 38.707403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:40:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001a9004b RSI=ffffffff81f175b3 RDI=ffff88800d48025a RBP=ffff88800c230c98 RSP=ffff8880103a7458 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00676f6c7379732f R12=ffff88800d480238 R13=0000000000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff81f175cd 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 00007f8632c61900 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=00007f86320c4880 CR3=000000000c448000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d152c5f9dc4f7e8200000000000ae988 XMM05=4ed4771a5b2f05890000000000134948 XMM06=19e9129bd510f23500000000001337e0 XMM07=fb795ef6d65770560000000000123990 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b7f4d1 RBX=ffff88800dbfa658 RCX=1ffff11001c3d0f8 RDX=dffffc0000000000 RSI=ffff88800cc61300 RDI=ffff88800dbfa688 RBP=ffff88800e1e8790 RSP=ffff888016e37398 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800cc61200 R13=0000000000000000 R14=ffff888016b1a768 R15=ffff888016b1a720 RIP=ffffffff818474fe RFL=00000046 [---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 00007f58b6ddb900 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=00007f58b6dba020 CR3=000000000ea9a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000