syzkaller login: [ 121.657575] BUG: Bad rss-counter state mm:000000006a625e84 type:MM_FILEPAGES val:33 [ 121.658633] BUG: Bad rss-counter state mm:000000006a625e84 type:MM_ANONPAGES val:22 [ 121.818984] ================================================================== [ 121.820067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 121.821230] Read of size 8 at addr ffff88800c7516b0 by task sshd/219 [ 121.822397] [ 121.822664] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 121.823695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 121.824678] Call Trace: [ 121.824995] [ 121.825278] dump_stack_lvl+0x91/0xf0 [ 121.825763] print_report+0xcc/0x620 [ 121.826279] ? __virt_addr_valid+0x102/0x340 [ 121.826839] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.827451] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.828074] kasan_report+0xbe/0xf0 [ 121.828555] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.829190] vma_interval_tree_remove+0xc75/0xec0 [ 121.829800] vma_prepare+0xc54/0x11a0 [ 121.830322] __split_vma+0x5af/0x950 [ 121.830809] ? __pfx___split_vma+0x10/0x10 [ 121.831338] ? find_held_lock+0x2c/0x110 [ 121.831864] do_vmi_align_munmap+0x2ba/0x11f0 [ 121.832438] ? lock_is_held_type+0x9f/0x120 [ 121.832987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 121.833596] ? mtree_range_walk+0x632/0x900 [ 121.834184] ? mas_walk+0x5c7/0x7c0 [ 121.834673] do_vmi_munmap+0x1f1/0x2b0 [ 121.835180] mmap_region+0x1f9/0x2660 [ 121.835661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 121.836174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 121.836888] ? __pfx_lock_acquire+0x10/0x10 [ 121.837420] ? __pfx_mmap_region+0x10/0x10 [ 121.837970] ? security_mmap_addr+0x7d/0xa0 [ 121.838554] ? get_unmapped_area+0x1f5/0x3f0 [ 121.839136] do_mmap+0x854/0xf00 [ 121.839593] vm_mmap_pgoff+0x1a6/0x3a0 [ 121.840111] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 121.840710] ksys_mmap_pgoff+0x3af/0x500 [ 121.841244] do_syscall_64+0x3f/0x90 [ 121.841752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.842458] RIP: 0033:0x7facbe9b3d82 [ 121.842942] 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 [ 121.845201] RSP: 002b:00007ffe46da5188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 121.846200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facbe9b3d82 [ 121.847093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facbdded000 [ 121.847978] RBP: 00007facbdded000 R08: 0000000000000009 R09: 0000000000001000 [ 121.848883] R10: 0000000000000812 R11: 0000000000000206 R12: 000056196a3a9980 [ 121.849783] R13: 00007ffe46da51a0 R14: 00007ffe46da51d0 R15: 00007ffe46da5530 [ 121.850715] [ 121.851026] [ 121.851245] Allocated by task 212: [ 121.851701] kasan_save_stack+0x22/0x50 [ 121.852233] kasan_set_track+0x25/0x30 [ 121.852763] __kasan_slab_alloc+0x59/0x70 [ 121.853319] kmem_cache_alloc+0x16b/0x370 [ 121.853863] vm_area_dup+0x20/0x160 [ 121.854378] __split_vma+0x170/0x950 [ 121.854876] split_vma+0xc6/0x110 [ 121.855343] mprotect_fixup+0x8d2/0xb30 [ 121.855874] do_mprotect_pkey+0x87e/0xd40 [ 121.856427] __x64_sys_mprotect+0x78/0xc0 [ 121.856985] do_syscall_64+0x3f/0x90 [ 121.857484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.858185] [ 121.858415] Freed by task 212: [ 121.858828] kasan_save_stack+0x22/0x50 [ 121.859357] kasan_set_track+0x25/0x30 [ 121.859879] kasan_save_free_info+0x2b/0x50 [ 121.860429] __kasan_slab_free+0x10a/0x190 [ 121.860993] kmem_cache_free+0x10d/0x4d0 [ 121.861530] rcu_core+0x8c8/0x2860 [ 121.862001] __do_softirq+0x1b7/0x7d4 [ 121.862529] [ 121.862758] Last potentially related work creation: [ 121.863457] kasan_save_stack+0x22/0x50 [ 121.863986] __kasan_record_aux_stack+0x8e/0xa0 [ 121.864582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 121.865256] remove_vma+0x139/0x170 [ 121.865732] do_vmi_align_munmap+0xd4a/0x11f0 [ 121.866355] do_vmi_munmap+0x1f1/0x2b0 [ 121.866867] __vm_munmap+0x138/0x3a0 [ 121.867362] __x64_sys_munmap+0x59/0x80 [ 121.867888] do_syscall_64+0x3f/0x90 [ 121.868382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.869046] [ 121.869272] The buggy address belongs to the object at ffff88800c751658 [ 121.869272] which belongs to the cache vm_area_struct of size 168 [ 121.870854] The buggy address is located 88 bytes inside of [ 121.870854] freed 168-byte region [ffff88800c751658, ffff88800c751700) [ 121.872333] [ 121.872561] The buggy address belongs to the physical page: [ 121.873256] page:000000000685836a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc751 [ 121.874441] memcg:ffff88800e792801 [ 121.874901] flags: 0x100000000000200(slab|node=0|zone=1) [ 121.875585] page_type: 0xffffffff() [ 121.876053] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 121.877027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e792801 [ 121.877979] page dumped because: kasan: bad access detected [ 121.878706] [ 121.878935] Memory state around the buggy address: [ 121.879553] ffff88800c751580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 121.880452] ffff88800c751600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 121.881366] >ffff88800c751680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 121.882280] ^ [ 121.882900] ffff88800c751700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 121.883812] ffff88800c751780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 121.884698] ================================================================== [ 121.885661] Disabling lock debugging due to kernel taint [ 124.465169] BUG: Bad rss-counter state mm:00000000abb80314 type:MM_FILEPAGES val:33 [ 124.466179] BUG: Bad rss-counter state mm:00000000abb80314 type:MM_ANONPAGES val:22 [ 124.933098] BUG: Bad rss-counter state mm:000000000993cdd3 type:MM_FILEPAGES val:33 [ 124.934093] BUG: Bad rss-counter state mm:000000000993cdd3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56956' (ECDSA) to the list of known hosts. 2023/06/19 21:52:07 fuzzer started 2023/06/19 21:52:08 dialing manager at localhost:44161 2023/06/19 21:52:08 checking machine... 2023/06/19 21:52:08 checking revisions... [ 125.609850] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:52:08 testing simple program... [ 125.653118] cgroup: Unknown subsys name 'net' [ 125.704307] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:50:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffd31229af8 CR3=000000000d9a0000 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=2037303a32353a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a32353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000038 RCX=0000000000000000 RDX=ffff88800f6d9b40 RSI=ffffffff81f314f2 RDI=0000000000000004 RBP=ffff888010adfd48 RSP=ffff88800f1e7998 R8 =0000000000000004 R9 =0000000000000480 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=dffffc0000000000 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c07e0 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 00007fe53ebfc900 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=00007fe53f1b40b0 CR3=000000000dd28000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000