syzkaller login: [ 38.318335] BUG: Bad rss-counter state mm:00000000291e1c16 type:MM_FILEPAGES val:33 [ 38.319717] BUG: Bad rss-counter state mm:00000000291e1c16 type:MM_ANONPAGES val:22 [ 38.467537] ================================================================== [ 38.468438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.469401] Read of size 8 at addr ffff88800e402058 by task sshd/220 [ 38.470161] [ 38.470386] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.471375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.472336] Call Trace: [ 38.472650] [ 38.472933] dump_stack_lvl+0x91/0xf0 [ 38.473508] print_report+0xcc/0x620 [ 38.474096] ? __virt_addr_valid+0x102/0x340 [ 38.474739] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.475463] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.476187] kasan_report+0xbe/0xf0 [ 38.476766] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.477524] vma_interval_tree_remove+0xc75/0xec0 [ 38.478261] vma_prepare+0xc54/0x11a0 [ 38.478839] __split_vma+0x5af/0x950 [ 38.479415] ? __pfx___split_vma+0x10/0x10 [ 38.480057] ? find_held_lock+0x2c/0x110 [ 38.480686] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.481376] ? lock_is_held_type+0x9f/0x120 [ 38.482043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.482691] ? mtree_range_walk+0x632/0x900 [ 38.483237] ? mas_walk+0x5c7/0x7c0 [ 38.483702] do_vmi_munmap+0x1f1/0x2b0 [ 38.484184] mmap_region+0x1f9/0x2660 [ 38.484660] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.485161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.485859] ? __pfx_lock_acquire+0x10/0x10 [ 38.486399] ? __pfx_mmap_region+0x10/0x10 [ 38.486924] ? security_mmap_addr+0x7d/0xa0 [ 38.487446] ? get_unmapped_area+0x1f5/0x3f0 [ 38.487984] do_mmap+0x854/0xf00 [ 38.488418] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.488901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.489454] ksys_mmap_pgoff+0x3af/0x500 [ 38.489972] do_syscall_64+0x3f/0x90 [ 38.490443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.491075] RIP: 0033:0x7f56dc92cd82 [ 38.491529] 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 [ 38.493629] RSP: 002b:00007ffdf4ddd418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.494530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56dc92cd82 [ 38.495369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56dbd66000 [ 38.496205] RBP: 00007f56dbd66000 R08: 0000000000000009 R09: 0000000000001000 [ 38.497038] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636dc6c7d90 [ 38.497866] R13: 00007ffdf4ddd430 R14: 00007ffdf4ddd460 R15: 00007ffdf4ddd7c0 [ 38.498721] [ 38.499012] [ 38.499224] Allocated by task 213: [ 38.499651] kasan_save_stack+0x22/0x50 [ 38.500153] kasan_set_track+0x25/0x30 [ 38.500645] __kasan_slab_alloc+0x59/0x70 [ 38.501158] kmem_cache_alloc+0x16b/0x370 [ 38.501663] vm_area_dup+0x20/0x160 [ 38.502127] __split_vma+0x170/0x950 [ 38.502593] split_vma+0xc6/0x110 [ 38.503039] mprotect_fixup+0x8d2/0xb30 [ 38.503535] do_mprotect_pkey+0x87e/0xd40 [ 38.504046] __x64_sys_mprotect+0x78/0xc0 [ 38.504563] do_syscall_64+0x3f/0x90 [ 38.505025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.505657] [ 38.505867] Freed by task 213: [ 38.506266] kasan_save_stack+0x22/0x50 [ 38.506761] kasan_set_track+0x25/0x30 [ 38.507244] kasan_save_free_info+0x2b/0x50 [ 38.507766] __kasan_slab_free+0x10a/0x190 [ 38.508288] kmem_cache_free+0x10d/0x4d0 [ 38.508794] rcu_core+0x8c8/0x2860 [ 38.509230] __do_softirq+0x1b7/0x7d4 [ 38.509701] [ 38.509919] Last potentially related work creation: [ 38.510521] kasan_save_stack+0x22/0x50 [ 38.511026] __kasan_record_aux_stack+0x8e/0xa0 [ 38.511593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.512284] remove_vma+0x139/0x170 [ 38.512749] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.513304] do_vmi_munmap+0x1f1/0x2b0 [ 38.513788] __vm_munmap+0x138/0x3a0 [ 38.514264] __x64_sys_munmap+0x59/0x80 [ 38.514756] do_syscall_64+0x3f/0x90 [ 38.515231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.515882] [ 38.516095] The buggy address belongs to the object at ffff88800e402000 [ 38.516095] which belongs to the cache vm_area_struct of size 168 [ 38.517557] The buggy address is located 88 bytes inside of [ 38.517557] freed 168-byte region [ffff88800e402000, ffff88800e4020a8) [ 38.518964] [ 38.519179] The buggy address belongs to the physical page: [ 38.519837] page:0000000023b4c876 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe402 [ 38.520906] memcg:ffff88800cfddc01 [ 38.521325] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.521976] page_type: 0xffffffff() [ 38.522418] raw: 0100000000000200 ffff88800879fc80 ffffea000038a600 dead000000000002 [ 38.523320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfddc01 [ 38.524259] page dumped because: kasan: bad access detected [ 38.524929] [ 38.525146] Memory state around the buggy address: [ 38.525760] ffff88800e401f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.526637] ffff88800e401f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.527529] >ffff88800e402000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.528423] ^ [ 38.529182] ffff88800e402080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.530091] ffff88800e402100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.530974] ================================================================== [ 38.532011] Disabling lock debugging due to kernel taint [ 40.789929] BUG: Bad rss-counter state mm:00000000aa45a0ac type:MM_FILEPAGES val:33 [ 40.791073] BUG: Bad rss-counter state mm:00000000aa45a0ac type:MM_ANONPAGES val:22 [ 41.365903] BUG: Bad rss-counter state mm:00000000db460762 type:MM_FILEPAGES val:33 [ 41.367457] BUG: Bad rss-counter state mm:00000000db460762 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9025' (ECDSA) to the list of known hosts. 2023/06/19 23:55:41 fuzzer started 2023/06/19 23:55:42 dialing manager at localhost:44161 2023/06/19 23:55:42 checking machine... 2023/06/19 23:55:42 checking revisions... [ 42.035181] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:55:42 testing simple program... [ 42.092282] cgroup: Unknown subsys name 'net' [ 42.156341] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:55:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f7b99875477 RCX=0000000000000000 RDX=ffff88801688b680 RSI=ffffffff81007b50 RDI=00007f7b99875477 RBP=00007f7b99875477 RSP=ffff888014597a30 R8 =ffffffff864b9d5a R9 =ffff888014597af0 R10=0000000000038001 R11=00000000000b6996 R12=ffff888014597b78 R13=0000000000000000 R14=ffff88801688b680 R15=ffff88800edd3be0 RIP=ffffffff814c081b 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 00007f7b99382900 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=00007ffc06e34000 CR3=000000000ddc6000 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=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 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=0000000000000001 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=00007fd1e4b88710 CR3=0000000013aae000 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=85651638364622be2c4d98ec3cbca787 XMM02=000000000011d648eff9b2d0a8fce9cb XMM03=000000000011d7182c67c8bc2e329bc3 XMM04=85774ebd16d0210000000000000ae988 XMM05=19e9129bd510f2350000000000133930 XMM06=a9fe572ccb5cdb910000000000132b08 XMM07=e042d86d42eb936e00000000001242d8 XMM08=2fa2ddd7295d9dd8000000000011d718 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000