syzkaller login: [ 38.681322] BUG: Bad rss-counter state mm:000000009026426f type:MM_FILEPAGES val:33 [ 38.682767] BUG: Bad rss-counter state mm:000000009026426f type:MM_ANONPAGES val:22 [ 38.844647] ================================================================== [ 38.845757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.846910] Read of size 8 at addr ffff888015a293f8 by task sshd/220 [ 38.847984] [ 38.848251] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.849318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.850553] Call Trace: [ 38.850953] [ 38.851306] dump_stack_lvl+0x91/0xf0 [ 38.851909] print_report+0xcc/0x620 [ 38.852503] ? __virt_addr_valid+0x102/0x340 [ 38.853181] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.853940] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.854704] kasan_report+0xbe/0xf0 [ 38.855303] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.856066] vma_interval_tree_remove+0xc75/0xec0 [ 38.856800] vma_prepare+0xc54/0x11a0 [ 38.857395] __split_vma+0x5af/0x950 [ 38.857975] ? __pfx___split_vma+0x10/0x10 [ 38.858621] ? find_held_lock+0x2c/0x110 [ 38.859261] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.859954] ? lock_is_held_type+0x9f/0x120 [ 38.860628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.861375] ? mtree_range_walk+0x632/0x900 [ 38.862058] ? mas_walk+0x5c7/0x7c0 [ 38.862646] do_vmi_munmap+0x1f1/0x2b0 [ 38.863278] mmap_region+0x1f9/0x2660 [ 38.863862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.864488] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.865373] ? __pfx_lock_acquire+0x10/0x10 [ 38.866025] ? __pfx_mmap_region+0x10/0x10 [ 38.866672] ? security_mmap_addr+0x7d/0xa0 [ 38.867342] ? get_unmapped_area+0x1f5/0x3f0 [ 38.868026] do_mmap+0x854/0xf00 [ 38.868570] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.869879] ksys_mmap_pgoff+0x3af/0x500 [ 38.870507] do_syscall_64+0x3f/0x90 [ 38.871116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871909] RIP: 0033:0x7f22ac627d82 [ 38.872469] 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 [ 38.875145] RSP: 002b:00007ffc9c1a44e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.876261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22ac627d82 [ 38.877318] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22aba61000 [ 38.878358] RBP: 00007f22aba61000 R08: 0000000000000009 R09: 0000000000001000 [ 38.879406] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559553207f70 [ 38.880458] R13: 00007ffc9c1a4500 R14: 00007ffc9c1a4530 R15: 00007ffc9c1a4890 [ 38.881535] [ 38.881892] [ 38.882150] Allocated by task 213: [ 38.882678] kasan_save_stack+0x22/0x50 [ 38.883257] kasan_set_track+0x25/0x30 [ 38.883799] __kasan_slab_alloc+0x59/0x70 [ 38.884375] kmem_cache_alloc+0x16b/0x370 [ 38.884945] vm_area_dup+0x20/0x160 [ 38.885450] __split_vma+0x170/0x950 [ 38.885989] split_vma+0xc6/0x110 [ 38.886455] mprotect_fixup+0x8d2/0xb30 [ 38.887018] do_mprotect_pkey+0x87e/0xd40 [ 38.887588] __x64_sys_mprotect+0x78/0xc0 [ 38.888150] do_syscall_64+0x3f/0x90 [ 38.888675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889397] [ 38.889636] Freed by task 213: [ 38.890076] kasan_save_stack+0x22/0x50 [ 38.890638] kasan_set_track+0x25/0x30 [ 38.891192] kasan_save_free_info+0x2b/0x50 [ 38.891793] __kasan_slab_free+0x10a/0x190 [ 38.892431] kmem_cache_free+0x10d/0x4d0 [ 38.893060] rcu_core+0x8c8/0x2860 [ 38.893608] __do_softirq+0x1b7/0x7d4 [ 38.894202] [ 38.894458] Last potentially related work creation: [ 38.895176] kasan_save_stack+0x22/0x50 [ 38.895672] __kasan_record_aux_stack+0x8e/0xa0 [ 38.896221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.896835] remove_vma+0x139/0x170 [ 38.897270] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.897803] do_vmi_munmap+0x1f1/0x2b0 [ 38.898264] __vm_munmap+0x138/0x3a0 [ 38.898710] __x64_sys_munmap+0x59/0x80 [ 38.899203] do_syscall_64+0x3f/0x90 [ 38.899656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.900404] [ 38.900658] The buggy address belongs to the object at ffff888015a293a0 [ 38.900658] which belongs to the cache vm_area_struct of size 168 [ 38.902404] The buggy address is located 88 bytes inside of [ 38.902404] freed 168-byte region [ffff888015a293a0, ffff888015a29448) [ 38.904070] [ 38.904323] The buggy address belongs to the physical page: [ 38.905100] page:00000000708bb6fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a29 [ 38.906391] memcg:ffff88801697a401 [ 38.906899] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.907727] page_type: 0xffffffff() [ 38.908262] raw: 0100000000000200 ffff8880087a0c80 ffffea0000401fc0 dead000000000003 [ 38.909347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801697a401 [ 38.910442] page dumped because: kasan: bad access detected [ 38.911241] [ 38.911492] Memory state around the buggy address: [ 38.912179] ffff888015a29280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.913192] ffff888015a29300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.914210] >ffff888015a29380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.915226] ^ [ 38.916226] ffff888015a29400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.917240] ffff888015a29480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.918251] ================================================================== [ 38.919401] Disabling lock debugging due to kernel taint [ 40.886168] BUG: Bad rss-counter state mm:00000000032cd45a type:MM_FILEPAGES val:33 [ 40.887297] BUG: Bad rss-counter state mm:00000000032cd45a type:MM_ANONPAGES val:22 [ 41.506517] BUG: Bad rss-counter state mm:00000000d0df7d9f type:MM_FILEPAGES val:33 [ 41.507715] BUG: Bad rss-counter state mm:00000000d0df7d9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38423' (ECDSA) to the list of known hosts. 2023/06/20 12:37:31 fuzzer started 2023/06/20 12:37:31 dialing manager at localhost:36067 2023/06/20 12:37:32 checking machine... 2023/06/20 12:37:32 checking revisions... [ 42.165781] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:37:32 testing simple program... [ 42.215681] cgroup: Unknown subsys name 'net' [ 42.253855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:37:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016beb700 RCX=ffffffff81294506 RDX=0000000000000000 RSI=1ffff11002001a4e RDI=ffff88801000d584 RBP=0000000000000009 RSP=ffff888016d97aa0 R8 =0000000000000000 R9 =ffff88806ce395d0 R10=0000000000000001 R11=0000000000000001 R12=ffff88806ce395c0 R13=dffffc0000000000 R14=ffff88801000d2c0 R15=ffff88801000d240 RIP=ffffffff8125b93b RFL=00000002 [-------] 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 00007f4d1d2bd700 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=00007f155e546000 CR3=00000000141ba000 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=37333a3231203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30333332342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303333 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=0000000000000000 RBX=00000000000000a4 RCX=ffffffff8184d0d7 RDX=ffff888016860000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800db5c0a4 RSP=ffff888014177870 R8 =0000000000000006 R9 =ffff88800db5c0a4 R10=ffffffff81000000 R11=0000000000000000 R12=ffff88800db5c000 R13=0000000000000001 R14=0000000000000001 R15=ffffea000036d600 RIP=ffffffff814c0860 RFL=00000283 [--S---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 00007f699c61b900 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=00007fff35122000 CR3=000000000da18000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000