syzkaller login: [ 31.780874] BUG: Bad rss-counter state mm:00000000d998a594 type:MM_FILEPAGES val:33 [ 31.782127] BUG: Bad rss-counter state mm:00000000d998a594 type:MM_ANONPAGES val:22 [ 31.817644] ================================================================== [ 31.818607] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.819699] Read of size 8 at addr ffff8880097b9c20 by task sshd/221 [ 31.820660] [ 31.820888] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.821808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.822810] Call Trace: [ 31.823138] [ 31.823428] dump_stack_lvl+0x91/0xf0 [ 31.823922] print_report+0xcc/0x620 [ 31.824411] ? __virt_addr_valid+0x102/0x340 [ 31.824959] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.825591] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.826218] kasan_report+0xbe/0xf0 [ 31.826703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.827334] vma_interval_tree_remove+0xc75/0xec0 [ 31.827939] vma_prepare+0xc54/0x11a0 [ 31.828434] __split_vma+0x5af/0x950 [ 31.828911] ? __pfx___split_vma+0x10/0x10 [ 31.829640] ? find_held_lock+0x2c/0x110 [ 31.830175] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.830747] ? lock_is_held_type+0x9f/0x120 [ 31.831293] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.831913] ? mtree_range_walk+0x632/0x900 [ 31.832468] ? mas_walk+0x5c7/0x7c0 [ 31.832945] do_vmi_munmap+0x1f1/0x2b0 [ 31.833464] mmap_region+0x1f9/0x2660 [ 31.833949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.834467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.835175] ? __pfx_lock_acquire+0x10/0x10 [ 31.835713] ? __pfx_mmap_region+0x10/0x10 [ 31.836246] ? security_mmap_addr+0x7d/0xa0 [ 31.836779] ? get_unmapped_area+0x1f5/0x3f0 [ 31.837330] do_mmap+0x854/0xf00 [ 31.837784] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.838282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.838845] ksys_mmap_pgoff+0x3af/0x500 [ 31.839356] do_syscall_64+0x3f/0x90 [ 31.839832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.840480] RIP: 0033:0x7f63e36aad82 [ 31.840939] 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 [ 31.843062] RSP: 002b:00007ffc120ef098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.843972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63e36aad82 [ 31.844810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63e2ae4000 [ 31.845681] RBP: 00007f63e2ae4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.846527] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbd1e21ec0 [ 31.847372] R13: 00007ffc120ef0b0 R14: 00007ffc120ef0e0 R15: 00007ffc120ef440 [ 31.848223] [ 31.848513] [ 31.848731] Allocated by task 214: [ 31.849160] kasan_save_stack+0x22/0x50 [ 31.849744] kasan_set_track+0x25/0x30 [ 31.850252] __kasan_slab_alloc+0x59/0x70 [ 31.850784] kmem_cache_alloc+0x16b/0x370 [ 31.851308] vm_area_dup+0x20/0x160 [ 31.851762] __split_vma+0x170/0x950 [ 31.852233] split_vma+0xc6/0x110 [ 31.852676] mprotect_fixup+0x8d2/0xb30 [ 31.853180] do_mprotect_pkey+0x87e/0xd40 [ 31.853711] __x64_sys_mprotect+0x78/0xc0 [ 31.854236] do_syscall_64+0x3f/0x90 [ 31.854709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.855345] [ 31.855566] Freed by task 19: [ 31.855946] kasan_save_stack+0x22/0x50 [ 31.856447] kasan_set_track+0x25/0x30 [ 31.856938] kasan_save_free_info+0x2b/0x50 [ 31.857492] __kasan_slab_free+0x10a/0x190 [ 31.858021] kmem_cache_free+0x10d/0x4d0 [ 31.858529] rcu_core+0x8c8/0x2860 [ 31.858970] __do_softirq+0x1b7/0x7d4 [ 31.859447] [ 31.859662] Last potentially related work creation: [ 31.860246] kasan_save_stack+0x22/0x50 [ 31.860744] __kasan_record_aux_stack+0x8e/0xa0 [ 31.861313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.861963] remove_vma+0x139/0x170 [ 31.862412] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.862970] do_vmi_munmap+0x1f1/0x2b0 [ 31.863453] __vm_munmap+0x138/0x3a0 [ 31.863916] __x64_sys_munmap+0x59/0x80 [ 31.864409] do_syscall_64+0x3f/0x90 [ 31.864878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.865522] [ 31.865740] Second to last potentially related work creation: [ 31.866451] kasan_save_stack+0x22/0x50 [ 31.866955] __kasan_record_aux_stack+0x8e/0xa0 [ 31.867526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.868164] remove_vma+0x139/0x170 [ 31.868612] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.869165] do_vmi_munmap+0x1f1/0x2b0 [ 31.869671] mmap_region+0x1f9/0x2660 [ 31.870155] do_mmap+0x854/0xf00 [ 31.870585] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.871070] ksys_mmap_pgoff+0x3af/0x500 [ 31.871572] do_syscall_64+0x3f/0x90 [ 31.872047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.872684] [ 31.872896] The buggy address belongs to the object at ffff8880097b9bc8 [ 31.872896] which belongs to the cache vm_area_struct of size 168 [ 31.874401] The buggy address is located 88 bytes inside of [ 31.874401] freed 168-byte region [ffff8880097b9bc8, ffff8880097b9c70) [ 31.875813] [ 31.876040] The buggy address belongs to the physical page: [ 31.876718] page:000000000d87b3c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97b9 [ 31.877815] memcg:ffff8880144d0001 [ 31.878249] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.878952] page_type: 0xffffffff() [ 31.879396] raw: 0100000000000200 ffff88800879fc80 ffffea000025fc40 dead000000000008 [ 31.880303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144d0001 [ 31.881200] page dumped because: kasan: bad access detected [ 31.881881] [ 31.882096] Memory state around the buggy address: [ 31.882670] ffff8880097b9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.883521] ffff8880097b9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.884377] >ffff8880097b9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.885243] ^ [ 31.885797] ffff8880097b9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.886658] ffff8880097b9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.887515] ================================================================== [ 31.888721] Disabling lock debugging due to kernel taint [ 34.627025] BUG: Bad rss-counter state mm:0000000041d58bfc type:MM_FILEPAGES val:33 [ 34.628276] BUG: Bad rss-counter state mm:0000000041d58bfc type:MM_ANONPAGES val:22 [ 35.052909] BUG: Bad rss-counter state mm:000000001bc84161 type:MM_FILEPAGES val:33 [ 35.053758] BUG: Bad rss-counter state mm:000000001bc84161 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54992' (ECDSA) to the list of known hosts. 2023/06/19 20:54:40 fuzzer started 2023/06/19 20:54:40 dialing manager at localhost:44161 2023/06/19 20:54:40 checking machine... 2023/06/19 20:54:40 checking revisions... [ 35.709511] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:54:40 testing simple program... [ 35.752208] cgroup: Unknown subsys name 'net' [ 35.825240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:54:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652988 RCX=0000000000000000 RDX=ffff8880103451c0 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800ef5f390 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=000000000000001e RIP=ffffffff8450bdc0 RFL=00000293 [--S-A-C] 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 00007f91b4aaa700 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=000055593e28aed8 CR3=000000000e33e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732030343a3435 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363038 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c27343 RBX=ffff88800e1399e8 RCX=1ffff11001aef6d2 RDX=dffffc0000000000 RSI=ffff88800cf010d0 RDI=ffff88800e139a18 RBP=ffff88800d77b660 RSP=ffff888015dffc08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800cf010c0 R13=0000000000000000 R14=ffff888009e15638 R15=ffff888009e155f0 RIP=ffffffff818474fe RFL=00000046 [---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 00007f0d6e5df900 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=00007ffdb8f3b000 CR3=00000000183ea000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000