syzkaller login: [ 38.791634] BUG: Bad rss-counter state mm:00000000bd958bbc type:MM_FILEPAGES val:33 [ 38.792398] BUG: Bad rss-counter state mm:00000000bd958bbc type:MM_ANONPAGES val:22 [ 38.920339] ================================================================== [ 38.921026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.921715] Read of size 8 at addr ffff88800ca52140 by task sshd/219 [ 38.922278] [ 38.922430] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.923031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.923728] Call Trace: [ 38.923956] [ 38.924180] dump_stack_lvl+0x91/0xf0 [ 38.924791] print_report+0xcc/0x620 [ 38.925147] ? __virt_addr_valid+0x102/0x340 [ 38.925544] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.925985] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.926472] kasan_report+0xbe/0xf0 [ 38.926808] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.927260] vma_interval_tree_remove+0xc75/0xec0 [ 38.927682] vma_prepare+0xc54/0x11a0 [ 38.928023] __split_vma+0x5af/0x950 [ 38.928357] ? __pfx___split_vma+0x10/0x10 [ 38.928721] ? find_held_lock+0x2c/0x110 [ 38.929081] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.929470] ? lock_is_held_type+0x9f/0x120 [ 38.929853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.930312] ? mtree_range_walk+0x632/0x900 [ 38.930707] ? mas_walk+0x5c7/0x7c0 [ 38.931044] do_vmi_munmap+0x1f1/0x2b0 [ 38.931384] mmap_region+0x1f9/0x2660 [ 38.931722] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.932068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.932566] ? __pfx_lock_acquire+0x10/0x10 [ 38.932938] ? __pfx_mmap_region+0x10/0x10 [ 38.933309] ? security_mmap_addr+0x7d/0xa0 [ 38.933688] ? get_unmapped_area+0x1f5/0x3f0 [ 38.934075] do_mmap+0x854/0xf00 [ 38.934420] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.934771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.935167] ksys_mmap_pgoff+0x3af/0x500 [ 38.935528] do_syscall_64+0x3f/0x90 [ 38.935863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936305] RIP: 0033:0x7f0aa4f58d82 [ 38.936627] 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 [ 38.938071] RSP: 002b:00007ffe20820308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.938718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0aa4f58d82 [ 38.939282] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0aa4392000 [ 38.939872] RBP: 00007f0aa4392000 R08: 0000000000000009 R09: 0000000000001000 [ 38.940445] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573a1db4d90 [ 38.941029] R13: 00007ffe20820320 R14: 00007ffe20820350 R15: 00007ffe208206b0 [ 38.941623] [ 38.941827] [ 38.941981] Allocated by task 212: [ 38.942297] kasan_save_stack+0x22/0x50 [ 38.942647] kasan_set_track+0x25/0x30 [ 38.942991] __kasan_slab_alloc+0x59/0x70 [ 38.943366] kmem_cache_alloc+0x16b/0x370 [ 38.943715] vm_area_dup+0x20/0x160 [ 38.944039] __split_vma+0x170/0x950 [ 38.944358] split_vma+0xc6/0x110 [ 38.944666] mprotect_fixup+0x8d2/0xb30 [ 38.945007] do_mprotect_pkey+0x87e/0xd40 [ 38.945380] __x64_sys_mprotect+0x78/0xc0 [ 38.945737] do_syscall_64+0x3f/0x90 [ 38.946068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946540] [ 38.946692] Freed by task 0: [ 38.946963] kasan_save_stack+0x22/0x50 [ 38.947294] kasan_set_track+0x25/0x30 [ 38.947629] kasan_save_free_info+0x2b/0x50 [ 38.948003] __kasan_slab_free+0x10a/0x190 [ 38.948371] kmem_cache_free+0x10d/0x4d0 [ 38.948720] rcu_core+0x8c8/0x2860 [ 38.949033] __do_softirq+0x1b7/0x7d4 [ 38.949365] [ 38.949509] Last potentially related work creation: [ 38.949912] kasan_save_stack+0x22/0x50 [ 38.950273] __kasan_record_aux_stack+0x8e/0xa0 [ 38.950666] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.951111] remove_vma+0x139/0x170 [ 38.951425] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.951808] do_vmi_munmap+0x1f1/0x2b0 [ 38.952141] __vm_munmap+0x138/0x3a0 [ 38.952463] __x64_sys_munmap+0x59/0x80 [ 38.952822] do_syscall_64+0x3f/0x90 [ 38.953147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953596] [ 38.953742] Second to last potentially related work creation: [ 38.954252] kasan_save_stack+0x22/0x50 [ 38.954590] __kasan_record_aux_stack+0x8e/0xa0 [ 38.954985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.955411] remove_vma+0x139/0x170 [ 38.955725] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.956087] do_vmi_munmap+0x1f1/0x2b0 [ 38.956413] mmap_region+0x1f9/0x2660 [ 38.956736] do_mmap+0x854/0xf00 [ 38.957028] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.957369] ksys_mmap_pgoff+0x3af/0x500 [ 38.957726] do_syscall_64+0x3f/0x90 [ 38.958071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958540] [ 38.958693] The buggy address belongs to the object at ffff88800ca520e8 [ 38.958693] which belongs to the cache vm_area_struct of size 168 [ 38.959694] The buggy address is located 88 bytes inside of [ 38.959694] freed 168-byte region [ffff88800ca520e8, ffff88800ca52190) [ 38.960709] [ 38.960865] The buggy address belongs to the physical page: [ 38.961342] page:00000000f7444e10 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca52 [ 38.962129] memcg:ffff88800e936b01 [ 38.962483] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.963000] page_type: 0xffffffff() [ 38.963319] raw: 0100000000000200 ffff8880087a0c80 ffffea000025cf40 dead000000000005 [ 38.963995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e936b01 [ 38.964643] page dumped because: kasan: bad access detected [ 38.965127] [ 38.965281] Memory state around the buggy address: [ 38.965697] ffff88800ca52000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.966323] ffff88800ca52080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.966936] >ffff88800ca52100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.967547] ^ [ 38.968009] ffff88800ca52180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.968624] ffff88800ca52200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.969249] ================================================================== [ 38.970252] Disabling lock debugging due to kernel taint [ 40.988729] BUG: Bad rss-counter state mm:00000000d15ef1c5 type:MM_FILEPAGES val:33 [ 40.989459] BUG: Bad rss-counter state mm:00000000d15ef1c5 type:MM_ANONPAGES val:22 [ 41.357923] BUG: Bad rss-counter state mm:00000000686681de type:MM_FILEPAGES val:33 [ 41.358734] BUG: Bad rss-counter state mm:00000000686681de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24050' (ECDSA) to the list of known hosts. 2023/06/21 09:18:59 fuzzer started 2023/06/21 09:18:59 dialing manager at localhost:36067 2023/06/21 09:18:59 checking machine... 2023/06/21 09:18:59 checking revisions... [ 41.950746] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:18:59 testing simple program... [ 41.984595] cgroup: Unknown subsys name 'net' [ 42.019151] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:59 Registers: info registers vcpu 0 RAX=fffffffffba0be33 RBX=ffffffff85dfdcbc RCX=ffffffff81809adc RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff88806ce099e0 R8 =ffffffff86138976 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc93 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=00007ffc6d35e8a8 CR3=000000000f27c000 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=2038353a38313a3930203132206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a303939343320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f6c31c740f0 CR3=000000000ca8a000 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=5ce25ac9463b55943249f75247cec3e4 XMM02=000000000011ba88eff9b2d0a8fce9cb XMM03=000000000011bb582c67c8bc2e329bc3 XMM04=61d47ade63bff68900000000000ae988 XMM05=5e66afbb7b40da720000000000134760 XMM06=806171799158d96700000000001331e0 XMM07=fb795ef6d65770560000000000122498 XMM08=2c67c8bc2e329bc3000000000011baf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000