syzkaller login: [ 34.805713] BUG: Bad rss-counter state mm:0000000025d2766a type:MM_FILEPAGES val:33 [ 34.806944] BUG: Bad rss-counter state mm:0000000025d2766a type:MM_ANONPAGES val:22 [ 34.844132] ================================================================== [ 34.845443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.846580] Read of size 8 at addr ffff88800e78d880 by task sshd/220 [ 34.847775] [ 34.848056] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.849390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.850696] Call Trace: [ 34.851094] [ 34.851450] dump_stack_lvl+0x91/0xf0 [ 34.852168] print_report+0xcc/0x620 [ 34.852862] ? __virt_addr_valid+0x102/0x340 [ 34.853563] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.854314] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.855076] kasan_report+0xbe/0xf0 [ 34.855645] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.856415] vma_interval_tree_remove+0xc75/0xec0 [ 34.857150] vma_prepare+0xc54/0x11a0 [ 34.857732] __split_vma+0x5af/0x950 [ 34.858301] ? __pfx___split_vma+0x10/0x10 [ 34.858951] ? find_held_lock+0x2c/0x110 [ 34.859579] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.860274] ? lock_is_held_type+0x9f/0x120 [ 34.860931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.861660] ? mtree_range_walk+0x632/0x900 [ 34.862330] ? mas_walk+0x5c7/0x7c0 [ 34.862910] do_vmi_munmap+0x1f1/0x2b0 [ 34.863509] mmap_region+0x1f9/0x2660 [ 34.864116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.864741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.865611] ? __pfx_lock_acquire+0x10/0x10 [ 34.866274] ? __pfx_mmap_region+0x10/0x10 [ 34.866931] ? security_mmap_addr+0x7d/0xa0 [ 34.867575] ? get_unmapped_area+0x1f5/0x3f0 [ 34.868259] do_mmap+0x854/0xf00 [ 34.868787] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.869385] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.870074] ksys_mmap_pgoff+0x3af/0x500 [ 34.870682] do_syscall_64+0x3f/0x90 [ 34.871255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.872052] RIP: 0033:0x7f7aa283bd82 [ 34.872606] 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 [ 34.875183] RSP: 002b:00007fff52ab1af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.876299] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7aa283bd82 [ 34.877355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7aa1c75000 [ 34.878397] RBP: 00007f7aa1c75000 R08: 0000000000000009 R09: 0000000000001000 [ 34.879451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bca448dec0 [ 34.880352] R13: 00007fff52ab1b10 R14: 00007fff52ab1b40 R15: 00007fff52ab1ea0 [ 34.881166] [ 34.881443] [ 34.881648] Allocated by task 213: [ 34.882048] kasan_save_stack+0x22/0x50 [ 34.882529] kasan_set_track+0x25/0x30 [ 34.882992] __kasan_slab_alloc+0x59/0x70 [ 34.883483] kmem_cache_alloc+0x16b/0x370 [ 34.884000] vm_area_dup+0x20/0x160 [ 34.884433] __split_vma+0x170/0x950 [ 34.884951] split_vma+0xc6/0x110 [ 34.885366] mprotect_fixup+0x8d2/0xb30 [ 34.885839] do_mprotect_pkey+0x87e/0xd40 [ 34.886334] __x64_sys_mprotect+0x78/0xc0 [ 34.886828] do_syscall_64+0x3f/0x90 [ 34.887287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.887933] [ 34.888143] Freed by task 213: [ 34.888525] kasan_save_stack+0x22/0x50 [ 34.889028] kasan_set_track+0x25/0x30 [ 34.889506] kasan_save_free_info+0x2b/0x50 [ 34.890032] __kasan_slab_free+0x10a/0x190 [ 34.890556] kmem_cache_free+0x10d/0x4d0 [ 34.891063] rcu_core+0x8c8/0x2860 [ 34.891509] __do_softirq+0x1b7/0x7d4 [ 34.891992] [ 34.892205] Last potentially related work creation: [ 34.892783] kasan_save_stack+0x22/0x50 [ 34.893279] __kasan_record_aux_stack+0x8e/0xa0 [ 34.893840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.894465] remove_vma+0x139/0x170 [ 34.894911] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.895466] do_vmi_munmap+0x1f1/0x2b0 [ 34.895966] __vm_munmap+0x138/0x3a0 [ 34.896425] __x64_sys_munmap+0x59/0x80 [ 34.896910] do_syscall_64+0x3f/0x90 [ 34.897375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.897998] [ 34.898213] The buggy address belongs to the object at ffff88800e78d828 [ 34.898213] which belongs to the cache vm_area_struct of size 168 [ 34.899651] The buggy address is located 88 bytes inside of [ 34.899651] freed 168-byte region [ffff88800e78d828, ffff88800e78d8d0) [ 34.901057] [ 34.901266] The buggy address belongs to the physical page: [ 34.901913] page:0000000090387536 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe78d [ 34.902965] memcg:ffff88801b822701 [ 34.903384] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.904050] page_type: 0xffffffff() [ 34.904502] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.905412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b822701 [ 34.906307] page dumped because: kasan: bad access detected [ 34.906959] [ 34.907170] Memory state around the buggy address: [ 34.907741] ffff88800e78d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.908586] ffff88800e78d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.909429] >ffff88800e78d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.910269] ^ [ 34.910673] ffff88800e78d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.911520] ffff88800e78d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.912377] ================================================================== [ 34.913286] Disabling lock debugging due to kernel taint [ 36.970536] BUG: Bad rss-counter state mm:00000000b3c4c4d9 type:MM_FILEPAGES val:33 [ 36.971811] BUG: Bad rss-counter state mm:00000000b3c4c4d9 type:MM_ANONPAGES val:22 [ 37.507632] BUG: Bad rss-counter state mm:00000000df8d1c9b type:MM_FILEPAGES val:33 [ 37.508694] BUG: Bad rss-counter state mm:00000000df8d1c9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11659' (ECDSA) to the list of known hosts. 2023/06/19 11:26:22 fuzzer started 2023/06/19 11:26:22 dialing manager at localhost:44161 2023/06/19 11:26:22 checking machine... 2023/06/19 11:26:22 checking revisions... [ 38.234952] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:26:22 testing simple program... [ 38.279727] cgroup: Unknown subsys name 'net' [ 38.332619] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:26:17 Registers: info registers vcpu 0 RAX=1ffff11001343c33 RBX=ffff88801470fa3a RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818c2093 RDI=ffff888009a1e198 RBP=0000000000000019 RSP=ffff88801470f958 R8 =0000000000000007 R9 =0000000000000000 R10=ffff888009a1e000 R11=0000000000000000 R12=ffff888009a1e001 R13=ffff888009a1e000 R14=ffffffff84d2fa00 R15=dffffc0000000000 RIP=ffffffff818c20f2 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 00007f743234e700 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=00007ffca7079388 CR3=000000000dace000 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=2032323a36323a3131203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383936393320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a36323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83640764 RBX=0000000000000001 RCX=ffffffff863b1762 RDX=dffffc0000000000 RSI=ffff88800f6d7d00 RDI=1ffff1100d9e1359 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff863b1766 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008a899 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88800f6d7d08 R15=ffff88806cf09a70 RIP=ffffffff8113106f 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 00007f4efd55c900 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=00007f4efdb11650 CR3=000000000f718000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000