syzkaller login: [ 46.619888] BUG: Bad rss-counter state mm:000000004f5423fa type:MM_FILEPAGES val:33 [ 46.621343] BUG: Bad rss-counter state mm:000000004f5423fa type:MM_ANONPAGES val:22 [ 46.792012] ================================================================== [ 46.793442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.794368] Read of size 8 at addr ffff8880181f5798 by task sshd/220 [ 46.795113] [ 46.795326] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.796174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.797118] Call Trace: [ 46.797433] [ 46.797706] dump_stack_lvl+0x91/0xf0 [ 46.798180] print_report+0xcc/0x620 [ 46.798654] ? __virt_addr_valid+0x102/0x340 [ 46.799197] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.799796] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.800397] kasan_report+0xbe/0xf0 [ 46.800863] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.801482] vma_interval_tree_remove+0xc75/0xec0 [ 46.802067] vma_prepare+0xc54/0x11a0 [ 46.802530] __split_vma+0x5af/0x950 [ 46.802994] ? __pfx___split_vma+0x10/0x10 [ 46.803506] ? find_held_lock+0x2c/0x110 [ 46.804013] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.804568] ? lock_is_held_type+0x9f/0x120 [ 46.805094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.805698] ? mtree_range_walk+0x632/0x900 [ 46.806235] ? mas_walk+0x5c7/0x7c0 [ 46.806694] do_vmi_munmap+0x1f1/0x2b0 [ 46.807174] mmap_region+0x1f9/0x2660 [ 46.807651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.808155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.808847] ? __pfx_lock_acquire+0x10/0x10 [ 46.809370] ? __pfx_mmap_region+0x10/0x10 [ 46.809884] ? security_mmap_addr+0x7d/0xa0 [ 46.810405] ? get_unmapped_area+0x1f5/0x3f0 [ 46.810947] do_mmap+0x854/0xf00 [ 46.811373] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.811852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.812397] ksys_mmap_pgoff+0x3af/0x500 [ 46.812895] do_syscall_64+0x3f/0x90 [ 46.813380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.814005] RIP: 0033:0x7fa1bea6ad82 [ 46.814448] 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 [ 46.816757] RSP: 002b:00007ffeff179748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.817872] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1bea6ad82 [ 46.818897] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1bdea4000 [ 46.819920] RBP: 00007fa1bdea4000 R08: 0000000000000009 R09: 0000000000001000 [ 46.820941] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623ae851d90 [ 46.821961] R13: 00007ffeff179760 R14: 00007ffeff179790 R15: 00007ffeff179af0 [ 46.823004] [ 46.823354] [ 46.823613] Allocated by task 213: [ 46.824127] kasan_save_stack+0x22/0x50 [ 46.824731] kasan_set_track+0x25/0x30 [ 46.825347] __kasan_slab_alloc+0x59/0x70 [ 46.825973] kmem_cache_alloc+0x16b/0x370 [ 46.826592] vm_area_dup+0x20/0x160 [ 46.827129] __split_vma+0x170/0x950 [ 46.827682] split_vma+0xc6/0x110 [ 46.828207] mprotect_fixup+0x8d2/0xb30 [ 46.828803] do_mprotect_pkey+0x87e/0xd40 [ 46.829432] __x64_sys_mprotect+0x78/0xc0 [ 46.830050] do_syscall_64+0x3f/0x90 [ 46.830617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.831390] [ 46.831643] Freed by task 213: [ 46.832114] kasan_save_stack+0x22/0x50 [ 46.832712] kasan_set_track+0x25/0x30 [ 46.833318] kasan_save_free_info+0x2b/0x50 [ 46.833954] __kasan_slab_free+0x10a/0x190 [ 46.834640] kmem_cache_free+0x10d/0x4d0 [ 46.835251] rcu_core+0x8c8/0x2860 [ 46.835784] __do_softirq+0x1b7/0x7d4 [ 46.836355] [ 46.836608] Last potentially related work creation: [ 46.837324] kasan_save_stack+0x22/0x50 [ 46.837922] __kasan_record_aux_stack+0x8e/0xa0 [ 46.838606] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.839368] remove_vma+0x139/0x170 [ 46.839913] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.840577] do_vmi_munmap+0x1f1/0x2b0 [ 46.841160] __vm_munmap+0x138/0x3a0 [ 46.841741] __x64_sys_munmap+0x59/0x80 [ 46.842337] do_syscall_64+0x3f/0x90 [ 46.842900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.843652] [ 46.843908] The buggy address belongs to the object at ffff8880181f5740 [ 46.843908] which belongs to the cache vm_area_struct of size 168 [ 46.845672] The buggy address is located 88 bytes inside of [ 46.845672] freed 168-byte region [ffff8880181f5740, ffff8880181f57e8) [ 46.847364] [ 46.847620] The buggy address belongs to the physical page: [ 46.848405] page:0000000075657bd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181f5 [ 46.849723] memcg:ffff88801999d101 [ 46.850229] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.851010] page_type: 0xffffffff() [ 46.851550] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.852650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801999d101 [ 46.853753] page dumped because: kasan: bad access detected [ 46.854540] [ 46.854794] Memory state around the buggy address: [ 46.855487] ffff8880181f5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.856493] ffff8880181f5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 46.857504] >ffff8880181f5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.858519] ^ [ 46.859098] ffff8880181f5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.860102] ffff8880181f5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.861104] ================================================================== [ 46.862245] Disabling lock debugging due to kernel taint [ 48.618143] BUG: Bad rss-counter state mm:000000000038ee69 type:MM_FILEPAGES val:33 [ 48.619397] BUG: Bad rss-counter state mm:000000000038ee69 type:MM_ANONPAGES val:22 [ 48.937022] BUG: Bad rss-counter state mm:00000000edc37b4a type:MM_FILEPAGES val:33 [ 48.938115] BUG: Bad rss-counter state mm:00000000edc37b4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50749' (ECDSA) to the list of known hosts. 2023/06/20 10:40:38 fuzzer started 2023/06/20 10:40:38 dialing manager at localhost:44161 2023/06/20 10:40:38 checking machine... 2023/06/20 10:40:38 checking revisions... [ 49.603504] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:40:38 testing simple program... [ 49.653027] cgroup: Unknown subsys name 'net' [ 49.709028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:40:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff68974b98 CR3=0000000005482000 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=00007f47343725100000561b432ea790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffba0fb34 RBX=ffffffff85dfca1c RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff888016b478c0 R8 =ffffffff86137508 R9 =ffff888016b479b8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f2bfd17d900 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=00007f2bfd734618 CR3=000000000ebce000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000