syzkaller login: [ 57.145258] BUG: Bad rss-counter state mm:00000000737c92db type:MM_FILEPAGES val:33 [ 57.146375] BUG: Bad rss-counter state mm:00000000737c92db type:MM_ANONPAGES val:22 [ 57.311926] ================================================================== [ 57.312880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.313827] Read of size 8 at addr ffff88800ea2d968 by task sshd/220 [ 57.314603] [ 57.314822] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.315799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.316804] Call Trace: [ 57.317213] [ 57.317562] dump_stack_lvl+0x91/0xf0 [ 57.318141] print_report+0xcc/0x620 [ 57.318708] ? __virt_addr_valid+0x102/0x340 [ 57.319363] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.320090] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.320845] kasan_report+0xbe/0xf0 [ 57.321428] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.322196] vma_interval_tree_remove+0xc75/0xec0 [ 57.322924] vma_prepare+0xc54/0x11a0 [ 57.323503] __split_vma+0x5af/0x950 [ 57.324079] ? __pfx___split_vma+0x10/0x10 [ 57.324739] ? find_held_lock+0x2c/0x110 [ 57.325381] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.326067] ? lock_is_held_type+0x9f/0x120 [ 57.326726] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.327470] ? mtree_range_walk+0x632/0x900 [ 57.328146] ? mas_walk+0x5c7/0x7c0 [ 57.328765] do_vmi_munmap+0x1f1/0x2b0 [ 57.329344] mmap_region+0x1f9/0x2660 [ 57.329832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.330337] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.331046] ? __pfx_lock_acquire+0x10/0x10 [ 57.331572] ? __pfx_mmap_region+0x10/0x10 [ 57.332100] ? security_mmap_addr+0x7d/0xa0 [ 57.332642] ? get_unmapped_area+0x1f5/0x3f0 [ 57.333191] do_mmap+0x854/0xf00 [ 57.333634] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.334129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.334694] ksys_mmap_pgoff+0x3af/0x500 [ 57.335201] do_syscall_64+0x3f/0x90 [ 57.335682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.336330] RIP: 0033:0x7f76e65b7d82 [ 57.336785] 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 [ 57.338893] RSP: 002b:00007ffc0706c588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.339789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76e65b7d82 [ 57.340650] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76e59f1000 [ 57.341491] RBP: 00007f76e59f1000 R08: 0000000000000009 R09: 0000000000001000 [ 57.342333] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e067d9d90 [ 57.343181] R13: 00007ffc0706c5a0 R14: 00007ffc0706c5d0 R15: 00007ffc0706c930 [ 57.344029] [ 57.344328] [ 57.344544] Allocated by task 213: [ 57.344974] kasan_save_stack+0x22/0x50 [ 57.345477] kasan_set_track+0x25/0x30 [ 57.345967] __kasan_slab_alloc+0x59/0x70 [ 57.346495] kmem_cache_alloc+0x16b/0x370 [ 57.347008] vm_area_dup+0x20/0x160 [ 57.347460] __split_vma+0x170/0x950 [ 57.347928] split_vma+0xc6/0x110 [ 57.348374] mprotect_fixup+0x8d2/0xb30 [ 57.348877] do_mprotect_pkey+0x87e/0xd40 [ 57.349406] __x64_sys_mprotect+0x78/0xc0 [ 57.349929] do_syscall_64+0x3f/0x90 [ 57.350402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.351040] [ 57.351254] Freed by task 213: [ 57.351643] kasan_save_stack+0x22/0x50 [ 57.352148] kasan_set_track+0x25/0x30 [ 57.352665] kasan_save_free_info+0x2b/0x50 [ 57.353197] __kasan_slab_free+0x10a/0x190 [ 57.353727] kmem_cache_free+0x10d/0x4d0 [ 57.354231] rcu_core+0x8c8/0x2860 [ 57.354683] __do_softirq+0x1b7/0x7d4 [ 57.355162] [ 57.355382] Last potentially related work creation: [ 57.355983] kasan_save_stack+0x22/0x50 [ 57.356498] __kasan_record_aux_stack+0x8e/0xa0 [ 57.357091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.357754] remove_vma+0x139/0x170 [ 57.358219] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.358781] do_vmi_munmap+0x1f1/0x2b0 [ 57.359287] __vm_munmap+0x138/0x3a0 [ 57.359764] __x64_sys_munmap+0x59/0x80 [ 57.360277] do_syscall_64+0x3f/0x90 [ 57.360775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.361432] [ 57.361658] The buggy address belongs to the object at ffff88800ea2d910 [ 57.361658] which belongs to the cache vm_area_struct of size 168 [ 57.363150] The buggy address is located 88 bytes inside of [ 57.363150] freed 168-byte region [ffff88800ea2d910, ffff88800ea2d9b8) [ 57.364652] [ 57.364876] The buggy address belongs to the physical page: [ 57.365574] page:00000000530aba72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea2d [ 57.366714] memcg:ffff88800f31f401 [ 57.367162] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.367844] page_type: 0xffffffff() [ 57.368335] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 57.369300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f31f401 [ 57.370257] page dumped because: kasan: bad access detected [ 57.370964] [ 57.371194] Memory state around the buggy address: [ 57.371808] ffff88800ea2d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 57.372737] ffff88800ea2d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 57.373644] >ffff88800ea2d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.374541] ^ [ 57.375367] ffff88800ea2d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 57.376282] ffff88800ea2da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.377176] ================================================================== [ 57.378192] Disabling lock debugging due to kernel taint [ 60.350977] BUG: Bad rss-counter state mm:00000000ab8ade1b type:MM_FILEPAGES val:33 [ 60.352333] BUG: Bad rss-counter state mm:00000000ab8ade1b type:MM_ANONPAGES val:22 [ 60.873530] BUG: Bad rss-counter state mm:0000000092487c24 type:MM_FILEPAGES val:33 [ 60.874520] BUG: Bad rss-counter state mm:0000000092487c24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46366' (ECDSA) to the list of known hosts. 2023/06/19 20:15:07 fuzzer started 2023/06/19 20:15:07 dialing manager at localhost:44161 2023/06/19 20:15:07 checking machine... 2023/06/19 20:15:07 checking revisions... [ 61.559475] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:15:07 testing simple program... [ 61.605538] cgroup: Unknown subsys name 'net' [ 61.658305] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:14:41 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=00007ffd705be8d8 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=00007efdb60c45100000561e05106790 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=ffffffff83640764 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001b6cede RSI=ffffffff83640764 RDI=ffff88800db67760 RBP=ffff88800db67730 RSP=ffff88800db67690 R8 =0000000000000001 R9 =ffff88800db676d8 R10=0000000000038001 R11=000000000008a899 R12=ffff88800db67760 R13=0000000000000000 R14=ffff8880132cb680 R15=0000000000092cc0 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007f4f8af80900 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=00007f4f8b537618 CR3=0000000006978000 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