syzkaller login: [ 38.648804] BUG: Bad rss-counter state mm:0000000006a9b573 type:MM_FILEPAGES val:33 [ 38.649983] BUG: Bad rss-counter state mm:0000000006a9b573 type:MM_ANONPAGES val:22 [ 38.772383] ================================================================== [ 38.773294] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.774021] Read of size 8 at addr ffff88800dbe6c20 by task sshd/220 [ 38.774750] [ 38.774937] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.775615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.776388] Call Trace: [ 38.776631] [ 38.776849] dump_stack_lvl+0x91/0xf0 [ 38.777253] print_report+0xcc/0x620 [ 38.777629] ? __virt_addr_valid+0x102/0x340 [ 38.778057] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.778538] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.779016] kasan_report+0xbe/0xf0 [ 38.779384] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.779867] vma_interval_tree_remove+0xc75/0xec0 [ 38.780343] vma_prepare+0xc54/0x11a0 [ 38.780721] __split_vma+0x5af/0x950 [ 38.781091] ? __pfx___split_vma+0x10/0x10 [ 38.781501] ? find_held_lock+0x2c/0x110 [ 38.781905] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.782334] ? lock_is_held_type+0x9f/0x120 [ 38.782751] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.783224] ? mtree_range_walk+0x632/0x900 [ 38.783653] ? mas_walk+0x5c7/0x7c0 [ 38.784024] do_vmi_munmap+0x1f1/0x2b0 [ 38.784435] mmap_region+0x1f9/0x2660 [ 38.784808] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.785180] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.785664] ? __pfx_lock_acquire+0x10/0x10 [ 38.786026] ? __pfx_mmap_region+0x10/0x10 [ 38.786392] ? security_mmap_addr+0x7d/0xa0 [ 38.786757] ? get_unmapped_area+0x1f5/0x3f0 [ 38.787129] do_mmap+0x854/0xf00 [ 38.787429] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.787764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.788141] ksys_mmap_pgoff+0x3af/0x500 [ 38.788490] do_syscall_64+0x3f/0x90 [ 38.788815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.789257] RIP: 0033:0x7fb2dd14dd82 [ 38.789572] 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 [ 38.791024] RSP: 002b:00007ffeab2b0588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.791644] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2dd14dd82 [ 38.792239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2dc587000 [ 38.792816] RBP: 00007fb2dc587000 R08: 0000000000000009 R09: 0000000000001000 [ 38.793388] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e834855ec0 [ 38.793964] R13: 00007ffeab2b05a0 R14: 00007ffeab2b05d0 R15: 00007ffeab2b0930 [ 38.794546] [ 38.794746] [ 38.794892] Allocated by task 213: [ 38.795187] kasan_save_stack+0x22/0x50 [ 38.795528] kasan_set_track+0x25/0x30 [ 38.795859] __kasan_slab_alloc+0x59/0x70 [ 38.796216] kmem_cache_alloc+0x16b/0x370 [ 38.796578] vm_area_dup+0x20/0x160 [ 38.796884] __split_vma+0x170/0x950 [ 38.797199] split_vma+0xc6/0x110 [ 38.797495] mprotect_fixup+0x8d2/0xb30 [ 38.797836] do_mprotect_pkey+0x87e/0xd40 [ 38.798187] __x64_sys_mprotect+0x78/0xc0 [ 38.798539] do_syscall_64+0x3f/0x90 [ 38.798859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.799290] [ 38.799433] Freed by task 213: [ 38.799697] kasan_save_stack+0x22/0x50 [ 38.800034] kasan_set_track+0x25/0x30 [ 38.800374] kasan_save_free_info+0x2b/0x50 [ 38.800738] __kasan_slab_free+0x10a/0x190 [ 38.801094] kmem_cache_free+0x10d/0x4d0 [ 38.801439] rcu_core+0x8c8/0x2860 [ 38.801743] __do_softirq+0x1b7/0x7d4 [ 38.802071] [ 38.802218] Last potentially related work creation: [ 38.802629] kasan_save_stack+0x22/0x50 [ 38.802974] __kasan_record_aux_stack+0x8e/0xa0 [ 38.803388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.803834] remove_vma+0x139/0x170 [ 38.804153] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.804550] do_vmi_munmap+0x1f1/0x2b0 [ 38.804901] __vm_munmap+0x138/0x3a0 [ 38.805230] __x64_sys_munmap+0x59/0x80 [ 38.805557] do_syscall_64+0x3f/0x90 [ 38.805868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.806288] [ 38.806432] Second to last potentially related work creation: [ 38.806884] kasan_save_stack+0x22/0x50 [ 38.807214] __kasan_record_aux_stack+0x8e/0xa0 [ 38.807589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.808005] remove_vma+0x139/0x170 [ 38.808311] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.808681] do_vmi_munmap+0x1f1/0x2b0 [ 38.809005] mmap_region+0x1f9/0x2660 [ 38.809327] do_mmap+0x854/0xf00 [ 38.809609] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.809927] ksys_mmap_pgoff+0x3af/0x500 [ 38.810253] do_syscall_64+0x3f/0x90 [ 38.810566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.810990] [ 38.811130] The buggy address belongs to the object at ffff88800dbe6bc8 [ 38.811130] which belongs to the cache vm_area_struct of size 168 [ 38.812105] The buggy address is located 88 bytes inside of [ 38.812105] freed 168-byte region [ffff88800dbe6bc8, ffff88800dbe6c70) [ 38.813043] [ 38.813198] The buggy address belongs to the physical page: [ 38.813678] page:00000000985a8afd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbe6 [ 38.814405] memcg:ffff88800daf9101 [ 38.814689] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.815161] page_type: 0xffffffff() [ 38.815489] raw: 0100000000000200 ffff8880087a0c80 ffffea000032bcc0 dead000000000003 [ 38.816210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daf9101 [ 38.816853] page dumped because: kasan: bad access detected [ 38.817304] [ 38.817448] Memory state around the buggy address: [ 38.817846] ffff88800dbe6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.818424] ffff88800dbe6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.819022] >ffff88800dbe6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.819642] ^ [ 38.820027] ffff88800dbe6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.820628] ffff88800dbe6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.821224] ================================================================== [ 38.821928] Disabling lock debugging due to kernel taint [ 40.812468] BUG: Bad rss-counter state mm:000000001d30cdea type:MM_FILEPAGES val:33 [ 40.813692] BUG: Bad rss-counter state mm:000000001d30cdea type:MM_ANONPAGES val:22 [ 41.281347] BUG: Bad rss-counter state mm:00000000186b85aa type:MM_FILEPAGES val:33 [ 41.282345] BUG: Bad rss-counter state mm:00000000186b85aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39538' (ECDSA) to the list of known hosts. 2023/06/20 17:56:34 fuzzer started 2023/06/20 17:56:35 dialing manager at localhost:36067 2023/06/20 17:56:35 checking machine... 2023/06/20 17:56:35 checking revisions... [ 41.992927] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:56:35 testing simple program... [ 42.039593] cgroup: Unknown subsys name 'net' [ 42.096932] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39500 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806ce395c0 RBP=ffffffff852bfeb0 RSP=ffff8880143479b0 R8 =0000000000000001 R9 =ffffed1002868f08 R10=0000000000000003 R11=0000000000000001 R12=ffff88806ce395c0 R13=ffff8880142f3680 R14=dffffc0000000000 R15=ffff888014347aa8 RIP=ffffffff81251850 RFL=00000046 [---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 00007f487d183900 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=00007f487c608d70 CR3=000000000e4f8000 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=1e8a3f6ee737088bbb4717e1ddb54aae XMM02=000000000011b370eff9b2d0a8fce9cb XMM03=000000000011b4402c67c8bc2e329bc3 XMM04=a0b17fb6802ce90a00000000000ae988 XMM05=19e9129bd510f2350000000000132c70 XMM06=dc6ec0adaf2fa1a50000000000131e48 XMM07=e042d86d42eb936e0000000000122058 XMM08=aa6db82e61466ad8000000000011b440 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f6b9e9cf0b0 CR3=0000000016e94000 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=36353a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323430 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000