syzkaller login: [ 35.655306] BUG: Bad rss-counter state mm:00000000dd842769 type:MM_FILEPAGES val:33 [ 35.656760] BUG: Bad rss-counter state mm:00000000dd842769 type:MM_ANONPAGES val:22 [ 35.826006] ================================================================== [ 35.827193] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.828337] Read of size 8 at addr ffff88800e91d6b0 by task sshd/219 [ 35.829261] [ 35.829488] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.830345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.831304] Call Trace: [ 35.831619] [ 35.831906] dump_stack_lvl+0x91/0xf0 [ 35.832390] print_report+0xcc/0x620 [ 35.832865] ? __virt_addr_valid+0x102/0x340 [ 35.833419] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.834031] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.834646] kasan_report+0xbe/0xf0 [ 35.835114] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.835727] vma_interval_tree_remove+0xc75/0xec0 [ 35.836327] vma_prepare+0xc54/0x11a0 [ 35.836797] __split_vma+0x5af/0x950 [ 35.837262] ? __pfx___split_vma+0x10/0x10 [ 35.837810] ? find_held_lock+0x2c/0x110 [ 35.838328] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.838890] ? lock_is_held_type+0x9f/0x120 [ 35.839419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.840019] ? mtree_range_walk+0x632/0x900 [ 35.840562] ? mas_walk+0x5c7/0x7c0 [ 35.841033] do_vmi_munmap+0x1f1/0x2b0 [ 35.841529] mmap_region+0x1f9/0x2660 [ 35.842008] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.842513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.843228] ? __pfx_lock_acquire+0x10/0x10 [ 35.843763] ? __pfx_mmap_region+0x10/0x10 [ 35.844296] ? security_mmap_addr+0x7d/0xa0 [ 35.844826] ? get_unmapped_area+0x1f5/0x3f0 [ 35.845376] do_mmap+0x854/0xf00 [ 35.845816] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.846310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.846875] ksys_mmap_pgoff+0x3af/0x500 [ 35.847378] do_syscall_64+0x3f/0x90 [ 35.847856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.848502] RIP: 0033:0x7f0f0674bd82 [ 35.848955] 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 [ 35.851085] RSP: 002b:00007ffde9ed8bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.851987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f0674bd82 [ 35.852839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f05b85000 [ 35.853684] RBP: 00007f0f05b85000 R08: 0000000000000009 R09: 0000000000001000 [ 35.854528] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588ae4f8ec0 [ 35.855363] R13: 00007ffde9ed8c10 R14: 00007ffde9ed8c40 R15: 00007ffde9ed8fa0 [ 35.856222] [ 35.856513] [ 35.856724] Allocated by task 212: [ 35.857151] kasan_save_stack+0x22/0x50 [ 35.857660] kasan_set_track+0x25/0x30 [ 35.858151] __kasan_slab_alloc+0x59/0x70 [ 35.858667] kmem_cache_alloc+0x16b/0x370 [ 35.859194] vm_area_dup+0x20/0x160 [ 35.859647] __split_vma+0x170/0x950 [ 35.860104] split_vma+0xc6/0x110 [ 35.860538] mprotect_fixup+0x8d2/0xb30 [ 35.861040] do_mprotect_pkey+0x87e/0xd40 [ 35.861577] __x64_sys_mprotect+0x78/0xc0 [ 35.862096] do_syscall_64+0x3f/0x90 [ 35.862575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.863225] [ 35.863437] Freed by task 212: [ 35.863827] kasan_save_stack+0x22/0x50 [ 35.864331] kasan_set_track+0x25/0x30 [ 35.864819] kasan_save_free_info+0x2b/0x50 [ 35.865352] __kasan_slab_free+0x10a/0x190 [ 35.865880] kmem_cache_free+0x10d/0x4d0 [ 35.866385] rcu_core+0x8c8/0x2860 [ 35.866825] __do_softirq+0x1b7/0x7d4 [ 35.867296] [ 35.867510] Last potentially related work creation: [ 35.868088] kasan_save_stack+0x22/0x50 [ 35.868590] __kasan_record_aux_stack+0x8e/0xa0 [ 35.869162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.869820] remove_vma+0x139/0x170 [ 35.870267] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.870822] do_vmi_munmap+0x1f1/0x2b0 [ 35.871299] __vm_munmap+0x138/0x3a0 [ 35.871764] __x64_sys_munmap+0x59/0x80 [ 35.872262] do_syscall_64+0x3f/0x90 [ 35.872735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.873377] [ 35.873591] Second to last potentially related work creation: [ 35.874270] kasan_save_stack+0x22/0x50 [ 35.874768] __kasan_record_aux_stack+0x8e/0xa0 [ 35.875336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.875975] remove_vma+0x139/0x170 [ 35.876421] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.876973] do_vmi_munmap+0x1f1/0x2b0 [ 35.877476] mmap_region+0x1f9/0x2660 [ 35.877952] do_mmap+0x854/0xf00 [ 35.878376] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.878863] ksys_mmap_pgoff+0x3af/0x500 [ 35.879374] do_syscall_64+0x3f/0x90 [ 35.879847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.880483] [ 35.880695] The buggy address belongs to the object at ffff88800e91d658 [ 35.880695] which belongs to the cache vm_area_struct of size 168 [ 35.882175] The buggy address is located 88 bytes inside of [ 35.882175] freed 168-byte region [ffff88800e91d658, ffff88800e91d700) [ 35.883576] [ 35.883793] The buggy address belongs to the physical page: [ 35.884460] page:000000008f0ef419 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe91d [ 35.885536] memcg:ffff88800d0c6f01 [ 35.885960] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.886599] page_type: 0xffffffff() [ 35.887046] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.887952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0c6f01 [ 35.888854] page dumped because: kasan: bad access detected [ 35.889523] [ 35.889735] Memory state around the buggy address: [ 35.890312] ffff88800e91d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.891159] ffff88800e91d600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.892000] >ffff88800e91d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.892845] ^ [ 35.893441] ffff88800e91d700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 35.894298] ffff88800e91d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.895140] ================================================================== [ 35.896211] Disabling lock debugging due to kernel taint [ 38.664969] BUG: Bad rss-counter state mm:00000000ff8a36cf type:MM_FILEPAGES val:33 [ 38.665984] BUG: Bad rss-counter state mm:00000000ff8a36cf type:MM_ANONPAGES val:22 [ 39.159251] BUG: Bad rss-counter state mm:00000000b04cbeba type:MM_FILEPAGES val:33 [ 39.160445] BUG: Bad rss-counter state mm:00000000b04cbeba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13971' (ECDSA) to the list of known hosts. 2023/06/20 06:15:09 fuzzer started 2023/06/20 06:15:09 dialing manager at localhost:44161 2023/06/20 06:15:09 checking machine... 2023/06/20 06:15:09 checking revisions... [ 39.847297] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:15:09 testing simple program... [ 39.898603] cgroup: Unknown subsys name 'net' [ 39.944567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:15:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880165ef9a0 RCX=0000000000000001 RDX=1ffff11002cbdf34 RSI=ffff8880165efc78 RDI=ffff8880165ef9a0 RBP=ffff8880165efa38 RSP=ffff8880165ef988 R8 =0000000000000001 R9 =ffff8880165ef9e0 R10=0000000000038001 R11=0000000000020cf8 R12=ffff8880165efa68 R13=0000000000000000 R14=ffff88800e490000 R15=ffff88800f6e7130 RIP=ffffffff8113035a RFL=00000212 [----A--] 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 00007efc39db4900 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=00007efc3a36b618 CR3=000000000f1ae000 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88806cf09c90 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff1100d9e1393 RIP=ffffffff845308c8 RFL=00000002 [-------] 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=00007f4e10d8ceb0 CR3=0000000013b72000 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=2039303a35313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a35313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000