syzkaller login: [ 30.669529] BUG: Bad rss-counter state mm:00000000e66b2751 type:MM_FILEPAGES val:33 [ 30.671019] BUG: Bad rss-counter state mm:00000000e66b2751 type:MM_ANONPAGES val:22 [ 30.824757] ================================================================== [ 30.825681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.826631] Read of size 8 at addr ffff888008dc9d08 by task sshd/220 [ 30.827403] [ 30.827626] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.828600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.829586] Call Trace: [ 30.829906] [ 30.830213] dump_stack_lvl+0x91/0xf0 [ 30.830707] print_report+0xcc/0x620 [ 30.831201] ? __virt_addr_valid+0x102/0x340 [ 30.831755] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.832384] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.833002] kasan_report+0xbe/0xf0 [ 30.833493] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834123] vma_interval_tree_remove+0xc75/0xec0 [ 30.834725] vma_prepare+0xc54/0x11a0 [ 30.835206] __split_vma+0x5af/0x950 [ 30.835685] ? __pfx___split_vma+0x10/0x10 [ 30.836235] ? find_held_lock+0x2c/0x110 [ 30.836758] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.837328] ? lock_is_held_type+0x9f/0x120 [ 30.837870] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.838480] ? mtree_range_walk+0x632/0x900 [ 30.839036] ? mas_walk+0x5c7/0x7c0 [ 30.839523] do_vmi_munmap+0x1f1/0x2b0 [ 30.840035] mmap_region+0x1f9/0x2660 [ 30.840520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.841037] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.841758] ? __pfx_lock_acquire+0x10/0x10 [ 30.842295] ? __pfx_mmap_region+0x10/0x10 [ 30.842828] ? security_mmap_addr+0x7d/0xa0 [ 30.843366] ? get_unmapped_area+0x1f5/0x3f0 [ 30.843921] do_mmap+0x854/0xf00 [ 30.844385] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.844886] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.845459] ksys_mmap_pgoff+0x3af/0x500 [ 30.845973] do_syscall_64+0x3f/0x90 [ 30.846464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847115] RIP: 0033:0x7fd50ece7d82 [ 30.847572] 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 [ 30.849732] RSP: 002b:00007ffc691ad3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.850645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd50ece7d82 [ 30.851500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd50e121000 [ 30.852363] RBP: 00007fd50e121000 R08: 0000000000000009 R09: 0000000000001000 [ 30.853212] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f957e06ec0 [ 30.854073] R13: 00007ffc691ad3f0 R14: 00007ffc691ad420 R15: 00007ffc691ad780 [ 30.854935] [ 30.855231] [ 30.855450] Allocated by task 213: [ 30.855883] kasan_save_stack+0x22/0x50 [ 30.856407] kasan_set_track+0x25/0x30 [ 30.856908] __kasan_slab_alloc+0x59/0x70 [ 30.857436] kmem_cache_alloc+0x16b/0x370 [ 30.857958] vm_area_dup+0x20/0x160 [ 30.858419] __split_vma+0x170/0x950 [ 30.858889] split_vma+0xc6/0x110 [ 30.859334] mprotect_fixup+0x8d2/0xb30 [ 30.859845] do_mprotect_pkey+0x87e/0xd40 [ 30.860394] __x64_sys_mprotect+0x78/0xc0 [ 30.860928] do_syscall_64+0x3f/0x90 [ 30.861409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862053] [ 30.862273] Freed by task 19: [ 30.862660] kasan_save_stack+0x22/0x50 [ 30.863169] kasan_set_track+0x25/0x30 [ 30.863673] kasan_save_free_info+0x2b/0x50 [ 30.864218] __kasan_slab_free+0x10a/0x190 [ 30.864757] kmem_cache_free+0x10d/0x4d0 [ 30.865270] rcu_core+0x8c8/0x2860 [ 30.865721] __do_softirq+0x1b7/0x7d4 [ 30.866206] [ 30.866423] Last potentially related work creation: [ 30.867050] kasan_save_stack+0x22/0x50 [ 30.867554] __kasan_record_aux_stack+0x8e/0xa0 [ 30.868134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.868784] remove_vma+0x139/0x170 [ 30.869245] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.869801] do_vmi_munmap+0x1f1/0x2b0 [ 30.870289] __vm_munmap+0x138/0x3a0 [ 30.870763] __x64_sys_munmap+0x59/0x80 [ 30.871267] do_syscall_64+0x3f/0x90 [ 30.871743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872416] [ 30.872632] The buggy address belongs to the object at ffff888008dc9cb0 [ 30.872632] which belongs to the cache vm_area_struct of size 168 [ 30.874113] The buggy address is located 88 bytes inside of [ 30.874113] freed 168-byte region [ffff888008dc9cb0, ffff888008dc9d58) [ 30.875522] [ 30.875741] The buggy address belongs to the physical page: [ 30.876412] page:00000000b6f38542 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8dc9 [ 30.877515] memcg:ffff88800c55df01 [ 30.877949] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.878607] page_type: 0xffffffff() [ 30.879069] raw: 0100000000000200 ffff8880087a0c80 ffffea00003366c0 dead000000000002 [ 30.880017] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c55df01 [ 30.880936] page dumped because: kasan: bad access detected [ 30.881594] [ 30.881814] Memory state around the buggy address: [ 30.882409] ffff888008dc9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.883271] ffff888008dc9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.884151] >ffff888008dc9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.884997] ^ [ 30.885436] ffff888008dc9d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.886291] ffff888008dc9e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.887165] ================================================================== [ 30.888142] Disabling lock debugging due to kernel taint [ 32.951202] BUG: Bad rss-counter state mm:0000000032454272 type:MM_FILEPAGES val:33 [ 32.952439] BUG: Bad rss-counter state mm:0000000032454272 type:MM_ANONPAGES val:22 [ 33.422448] BUG: Bad rss-counter state mm:00000000e256342e type:MM_FILEPAGES val:33 [ 33.423444] BUG: Bad rss-counter state mm:00000000e256342e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20782' (ECDSA) to the list of known hosts. 2023/06/20 11:16:48 fuzzer started 2023/06/20 11:16:48 dialing manager at localhost:36067 2023/06/20 11:16:48 checking machine... 2023/06/20 11:16:48 checking revisions... [ 34.126995] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:16:48 testing simple program... [ 34.178256] cgroup: Unknown subsys name 'net' [ 34.232482] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:16:48 Registers: info registers vcpu 0 RAX=ffffffff86138eb0 RBX=ffffffff85dfe038 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe038 RSP=ffff88806ce099f0 R8 =ffffffff86138eb0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe034 R13=ffffffff85dfe034 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb7 RFL=00000286 [--S--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 00007f80f991f900 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=00007fa56f1d4008 CR3=000000001bc16000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=0000000000000001 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=00007ffccefd0e58 CR3=000000000d5fa000 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=2037343a36313a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000