syzkaller login: [ 35.635262] BUG: Bad rss-counter state mm:000000008af33ff0 type:MM_FILEPAGES val:33 [ 35.636307] BUG: Bad rss-counter state mm:000000008af33ff0 type:MM_ANONPAGES val:22 [ 35.813717] ================================================================== [ 35.814707] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.815695] Read of size 8 at addr ffff88801a631880 by task sshd/220 [ 35.816483] [ 35.816723] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.817934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.819211] Call Trace: [ 35.819636] [ 35.820013] dump_stack_lvl+0x91/0xf0 [ 35.820655] print_report+0xcc/0x620 [ 35.821292] ? __virt_addr_valid+0x102/0x340 [ 35.822013] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.822827] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.823641] kasan_report+0xbe/0xf0 [ 35.824296] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.825112] vma_interval_tree_remove+0xc75/0xec0 [ 35.825915] vma_prepare+0xc54/0x11a0 [ 35.826577] __split_vma+0x5af/0x950 [ 35.827183] ? __pfx___split_vma+0x10/0x10 [ 35.827830] ? find_held_lock+0x2c/0x110 [ 35.828485] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.829248] ? lock_is_held_type+0x9f/0x120 [ 35.829987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.830812] ? mtree_range_walk+0x632/0x900 [ 35.831556] ? mas_walk+0x5c7/0x7c0 [ 35.832187] do_vmi_munmap+0x1f1/0x2b0 [ 35.832846] mmap_region+0x1f9/0x2660 [ 35.833492] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.834181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.835123] ? __pfx_lock_acquire+0x10/0x10 [ 35.835834] ? __pfx_mmap_region+0x10/0x10 [ 35.836533] ? security_mmap_addr+0x7d/0xa0 [ 35.837215] ? get_unmapped_area+0x1f5/0x3f0 [ 35.837918] do_mmap+0x854/0xf00 [ 35.838470] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.839081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.839833] ksys_mmap_pgoff+0x3af/0x500 [ 35.840522] do_syscall_64+0x3f/0x90 [ 35.841152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.842019] RIP: 0033:0x7f8c6bdb5d82 [ 35.842658] 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 [ 35.845471] RSP: 002b:00007ffd9faa3808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.846680] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c6bdb5d82 [ 35.847821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c6b1ef000 [ 35.848944] RBP: 00007f8c6b1ef000 R08: 0000000000000009 R09: 0000000000001000 [ 35.850040] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561800909ec0 [ 35.851177] R13: 00007ffd9faa3820 R14: 00007ffd9faa3850 R15: 00007ffd9faa3bb0 [ 35.852318] [ 35.852709] [ 35.852994] Allocated by task 213: [ 35.853567] kasan_save_stack+0x22/0x50 [ 35.854228] kasan_set_track+0x25/0x30 [ 35.854888] __kasan_slab_alloc+0x59/0x70 [ 35.855585] kmem_cache_alloc+0x16b/0x370 [ 35.856286] vm_area_dup+0x20/0x160 [ 35.856907] __split_vma+0x170/0x950 [ 35.857527] split_vma+0xc6/0x110 [ 35.858120] mprotect_fixup+0x8d2/0xb30 [ 35.858822] do_mprotect_pkey+0x87e/0xd40 [ 35.859524] __x64_sys_mprotect+0x78/0xc0 [ 35.860220] do_syscall_64+0x3f/0x90 [ 35.860850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.861690] [ 35.861984] Freed by task 213: [ 35.862525] kasan_save_stack+0x22/0x50 [ 35.863189] kasan_set_track+0x25/0x30 [ 35.863853] kasan_save_free_info+0x2b/0x50 [ 35.864565] __kasan_slab_free+0x10a/0x190 [ 35.865283] kmem_cache_free+0x10d/0x4d0 [ 35.865970] rcu_core+0x8c8/0x2860 [ 35.866589] __do_softirq+0x1b7/0x7d4 [ 35.867221] [ 35.867510] Last potentially related work creation: [ 35.868289] kasan_save_stack+0x22/0x50 [ 35.868957] __kasan_record_aux_stack+0x8e/0xa0 [ 35.869702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.870542] remove_vma+0x139/0x170 [ 35.871123] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.871844] do_vmi_munmap+0x1f1/0x2b0 [ 35.872483] __vm_munmap+0x138/0x3a0 [ 35.873090] __x64_sys_munmap+0x59/0x80 [ 35.873751] do_syscall_64+0x3f/0x90 [ 35.874374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.875265] [ 35.875538] The buggy address belongs to the object at ffff88801a631828 [ 35.875538] which belongs to the cache vm_area_struct of size 168 [ 35.877458] The buggy address is located 88 bytes inside of [ 35.877458] freed 168-byte region [ffff88801a631828, ffff88801a6318d0) [ 35.879366] [ 35.879660] The buggy address belongs to the physical page: [ 35.880431] page:00000000fe9c5a4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a631 [ 35.881652] memcg:ffff88801a412c01 [ 35.882131] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.882867] page_type: 0xffffffff() [ 35.883364] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.884363] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a412c01 [ 35.885362] page dumped because: kasan: bad access detected [ 35.886082] [ 35.886322] Memory state around the buggy address: [ 35.886983] ffff88801a631780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.887913] ffff88801a631800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.888858] >ffff88801a631880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.889768] ^ [ 35.890225] ffff88801a631900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.891213] ffff88801a631980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.892157] ================================================================== [ 35.893237] Disabling lock debugging due to kernel taint [ 37.922651] BUG: Bad rss-counter state mm:00000000d44b520d type:MM_FILEPAGES val:32 [ 37.923436] BUG: Bad rss-counter state mm:00000000d44b520d type:MM_ANONPAGES val:22 [ 38.350162] BUG: Bad rss-counter state mm:00000000b275f1fd type:MM_FILEPAGES val:33 [ 38.351354] BUG: Bad rss-counter state mm:00000000b275f1fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12166' (ECDSA) to the list of known hosts. 2023/06/20 04:46:20 fuzzer started 2023/06/20 04:46:21 dialing manager at localhost:44161 2023/06/20 04:46:21 checking machine... 2023/06/20 04:46:21 checking revisions... [ 39.078746] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:46:21 testing simple program... [ 39.127923] cgroup: Unknown subsys name 'net' [ 39.182705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:46:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a50 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff888016877dc8 RDI=ffffffff8186c1c5 RBP=ffff88806ce09aa8 RSP=ffff88806ce09a30 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000038dbb R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888014620000 R15=ffff888015843c00 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007f05efaff900 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=00007f05f00b70b0 CR3=000000000c572000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffcf4047000 CR3=00000000165ae000 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=2030323a36343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a36343a3430203032 XMM08=00000000000000000000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000