syzkaller login: [ 30.651064] BUG: Bad rss-counter state mm:00000000735d6d06 type:MM_FILEPAGES val:33 [ 30.652195] BUG: Bad rss-counter state mm:00000000735d6d06 type:MM_ANONPAGES val:22 [ 30.810232] ================================================================== [ 30.811298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.812419] Read of size 8 at addr ffff88800fbf1d08 by task sshd/220 [ 30.813364] [ 30.813592] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.814447] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.815434] Call Trace: [ 30.815761] <TASK> [ 30.816049] dump_stack_lvl+0x91/0xf0 [ 30.816542] print_report+0xcc/0x620 [ 30.817034] ? __virt_addr_valid+0x102/0x340 [ 30.817595] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818216] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.818836] kasan_report+0xbe/0xf0 [ 30.819309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819926] vma_interval_tree_remove+0xc75/0xec0 [ 30.820521] vma_prepare+0xc54/0x11a0 [ 30.821014] __split_vma+0x5af/0x950 [ 30.821481] ? __pfx___split_vma+0x10/0x10 [ 30.822008] ? find_held_lock+0x2c/0x110 [ 30.822523] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.823093] ? lock_is_held_type+0x9f/0x120 [ 30.823630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.824231] ? mtree_range_walk+0x632/0x900 [ 30.824779] ? mas_walk+0x5c7/0x7c0 [ 30.825258] do_vmi_munmap+0x1f1/0x2b0 [ 30.825751] mmap_region+0x1f9/0x2660 [ 30.826236] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.826741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.827449] ? __pfx_lock_acquire+0x10/0x10 [ 30.827976] ? __pfx_mmap_region+0x10/0x10 [ 30.828500] ? security_mmap_addr+0x7d/0xa0 [ 30.829054] ? get_unmapped_area+0x1f5/0x3f0 [ 30.829597] do_mmap+0x854/0xf00 [ 30.830033] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.830526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.831084] ksys_mmap_pgoff+0x3af/0x500 [ 30.831585] do_syscall_64+0x3f/0x90 [ 30.832059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.832699] RIP: 0033:0x7f0d7123dd82 [ 30.833163] 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 [ 30.835268] RSP: 002b:00007fff99b61278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.836166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d7123dd82 [ 30.837016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d70677000 [ 30.837857] RBP: 00007f0d70677000 R08: 0000000000000009 R09: 0000000000001000 [ 30.838697] R10: 0000000000000812 R11: 0000000000000206 R12: 000055596d33cf60 [ 30.839538] R13: 00007fff99b61290 R14: 00007fff99b612c0 R15: 00007fff99b61620 [ 30.840388] </TASK> [ 30.840680] [ 30.840911] Allocated by task 213: [ 30.841339] kasan_save_stack+0x22/0x50 [ 30.841840] kasan_set_track+0x25/0x30 [ 30.842333] __kasan_slab_alloc+0x59/0x70 [ 30.842850] kmem_cache_alloc+0x16b/0x370 [ 30.843359] vm_area_dup+0x20/0x160 [ 30.843810] __split_vma+0x170/0x950 [ 30.844278] split_vma+0xc6/0x110 [ 30.844711] mprotect_fixup+0x8d2/0xb30 [ 30.845222] do_mprotect_pkey+0x87e/0xd40 [ 30.845739] __x64_sys_mprotect+0x78/0xc0 [ 30.846258] do_syscall_64+0x3f/0x90 [ 30.846729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847365] [ 30.847582] Freed by task 213: [ 30.847974] kasan_save_stack+0x22/0x50 [ 30.848471] kasan_set_track+0x25/0x30 [ 30.848966] kasan_save_free_info+0x2b/0x50 [ 30.849493] __kasan_slab_free+0x10a/0x190 [ 30.850019] kmem_cache_free+0x10d/0x4d0 [ 30.850521] rcu_core+0x8c8/0x2860 [ 30.850967] __do_softirq+0x1b7/0x7d4 [ 30.851437] [ 30.851652] Last potentially related work creation: [ 30.852231] kasan_save_stack+0x22/0x50 [ 30.852734] __kasan_record_aux_stack+0x8e/0xa0 [ 30.853321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.854006] remove_vma+0x139/0x170 [ 30.854457] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.855013] do_vmi_munmap+0x1f1/0x2b0 [ 30.855495] __vm_munmap+0x138/0x3a0 [ 30.855959] __x64_sys_munmap+0x59/0x80 [ 30.856450] do_syscall_64+0x3f/0x90 [ 30.856930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857565] [ 30.857782] The buggy address belongs to the object at ffff88800fbf1cb0 [ 30.857782] which belongs to the cache vm_area_struct of size 168 [ 30.859242] The buggy address is located 88 bytes inside of [ 30.859242] freed 168-byte region [ffff88800fbf1cb0, ffff88800fbf1d58) [ 30.860634] [ 30.860848] The buggy address belongs to the physical page: [ 30.861527] page:000000002c8eed62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbf1 [ 30.862601] memcg:ffff888015a26301 [ 30.863025] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.863666] page_type: 0xffffffff() [ 30.864113] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.865035] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a26301 [ 30.865934] page dumped because: kasan: bad access detected [ 30.866590] [ 30.866806] Memory state around the buggy address: [ 30.867384] ffff88800fbf1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.868230] ffff88800fbf1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.869092] >ffff88800fbf1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.869935] ^ [ 30.870373] ffff88800fbf1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.871218] ffff88800fbf1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.872061] ================================================================== [ 30.872998] Disabling lock debugging due to kernel taint [ 33.248695] BUG: Bad rss-counter state mm:000000000c93f971 type:MM_FILEPAGES val:33 [ 33.249805] BUG: Bad rss-counter state mm:000000000c93f971 type:MM_ANONPAGES val:22 [ 33.754037] BUG: Bad rss-counter state mm:0000000032310bf4 type:MM_FILEPAGES val:33 [ 33.755214] BUG: Bad rss-counter state mm:0000000032310bf4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61501' (ECDSA) to the list of known hosts. 2023/06/19 18:23:29 fuzzer started 2023/06/19 18:23:29 dialing manager at localhost:44161 2023/06/19 18:23:29 checking machine... 2023/06/19 18:23:29 checking revisions... [ 34.488284] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:23:30 testing simple program... [ 34.539303] cgroup: Unknown subsys name 'net' [ 34.599996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:29 Registers: info registers vcpu 0 RAX=1ffffffff0bbf8d5 RBX=ffffffff85dfc6ac RCX=ffffffff81809910 RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a4 RSP=ffff88806ce09998 R8 =ffffffff86137004 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6b4 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 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=00007ffd4417f5f8 CR3=000000000e662000 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=2039323a33323a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a33323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff815a5cb9 RDI=ffffc90000659181 RBP=ffff888015857d28 RSP=ffff888015857c60 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000110 R11=0000000000000000 R12=000000007fff0000 R13=ffff888015857d60 R14=00000000000000b4 R15=ffffc90000659180 RIP=ffffffff815a5d07 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 00007f43f220e900 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=00007f5db8cc8650 CR3=000000000ca52000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ce1304c3ed00e2ff00000000000ae988 XMM05=4d964a9f22c4e9890000000000136b68 XMM06=19e9129bd510f2350000000000135a20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000