syzkaller login: [ 32.323136] BUG: Bad rss-counter state mm:00000000fcc98918 type:MM_FILEPAGES val:33 [ 32.324558] BUG: Bad rss-counter state mm:00000000fcc98918 type:MM_ANONPAGES val:22 [ 32.473463] ================================================================== [ 32.474563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.475790] Read of size 8 at addr ffff88800ef10a50 by task sshd/219 [ 32.476591] [ 32.476808] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.477669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.478680] Call Trace: [ 32.478997] [ 32.479283] dump_stack_lvl+0x91/0xf0 [ 32.479789] print_report+0xcc/0x620 [ 32.480272] ? __virt_addr_valid+0x102/0x340 [ 32.480821] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.481433] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.482053] kasan_report+0xbe/0xf0 [ 32.482532] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.483151] vma_interval_tree_remove+0xc75/0xec0 [ 32.483774] vma_prepare+0xc54/0x11a0 [ 32.484249] __split_vma+0x5af/0x950 [ 32.484723] ? __pfx___split_vma+0x10/0x10 [ 32.485256] ? find_held_lock+0x2c/0x110 [ 32.485773] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.486343] ? lock_is_held_type+0x9f/0x120 [ 32.486873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.487490] ? mtree_range_walk+0x632/0x900 [ 32.488040] ? mas_walk+0x5c7/0x7c0 [ 32.488516] do_vmi_munmap+0x1f1/0x2b0 [ 32.489013] mmap_region+0x1f9/0x2660 [ 32.489501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.490013] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.490726] ? __pfx_lock_acquire+0x10/0x10 [ 32.491256] ? __pfx_mmap_region+0x10/0x10 [ 32.491795] ? security_mmap_addr+0x7d/0xa0 [ 32.492323] ? get_unmapped_area+0x1f5/0x3f0 [ 32.492867] do_mmap+0x854/0xf00 [ 32.493307] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.493801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.494364] ksys_mmap_pgoff+0x3af/0x500 [ 32.494875] do_syscall_64+0x3f/0x90 [ 32.495349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.496005] RIP: 0033:0x7f0c9122ad82 [ 32.496459] 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 [ 32.498582] RSP: 002b:00007ffd14d97708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.499489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c9122ad82 [ 32.500334] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c90664000 [ 32.501187] RBP: 00007f0c90664000 R08: 0000000000000009 R09: 0000000000001000 [ 32.502028] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d28c8dec0 [ 32.502870] R13: 00007ffd14d97720 R14: 00007ffd14d97750 R15: 00007ffd14d97ab0 [ 32.503725] [ 32.504019] [ 32.504233] Allocated by task 212: [ 32.504663] kasan_save_stack+0x22/0x50 [ 32.505164] kasan_set_track+0x25/0x30 [ 32.505659] __kasan_slab_alloc+0x59/0x70 [ 32.506192] kmem_cache_alloc+0x16b/0x370 [ 32.506709] vm_area_dup+0x20/0x160 [ 32.507160] __split_vma+0x170/0x950 [ 32.507637] split_vma+0xc6/0x110 [ 32.508082] mprotect_fixup+0x8d2/0xb30 [ 32.508589] do_mprotect_pkey+0x87e/0xd40 [ 32.509108] __x64_sys_mprotect+0x78/0xc0 [ 32.509623] do_syscall_64+0x3f/0x90 [ 32.510103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.510739] [ 32.510952] Freed by task 212: [ 32.511345] kasan_save_stack+0x22/0x50 [ 32.511854] kasan_set_track+0x25/0x30 [ 32.512352] kasan_save_free_info+0x2b/0x50 [ 32.512878] __kasan_slab_free+0x10a/0x190 [ 32.513415] kmem_cache_free+0x10d/0x4d0 [ 32.513927] rcu_core+0x8c8/0x2860 [ 32.514376] __do_softirq+0x1b7/0x7d4 [ 32.514854] [ 32.515068] Last potentially related work creation: [ 32.515681] kasan_save_stack+0x22/0x50 [ 32.516189] __kasan_record_aux_stack+0x8e/0xa0 [ 32.516762] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.517412] remove_vma+0x139/0x170 [ 32.517866] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.518426] do_vmi_munmap+0x1f1/0x2b0 [ 32.518913] __vm_munmap+0x138/0x3a0 [ 32.519385] __x64_sys_munmap+0x59/0x80 [ 32.519885] do_syscall_64+0x3f/0x90 [ 32.520360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.521018] [ 32.521238] The buggy address belongs to the object at ffff88800ef109f8 [ 32.521238] which belongs to the cache vm_area_struct of size 168 [ 32.522710] The buggy address is located 88 bytes inside of [ 32.522710] freed 168-byte region [ffff88800ef109f8, ffff88800ef10aa0) [ 32.524133] [ 32.524348] The buggy address belongs to the physical page: [ 32.525009] page:000000007b4efc4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef10 [ 32.526095] memcg:ffff88800f8a5701 [ 32.526525] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.527181] page_type: 0xffffffff() [ 32.527652] raw: 0100000000000200 ffff88800879fc80 ffffea0000397dc0 dead000000000002 [ 32.528577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f8a5701 [ 32.529484] page dumped because: kasan: bad access detected [ 32.530150] [ 32.530368] Memory state around the buggy address: [ 32.530943] ffff88800ef10900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.531807] ffff88800ef10980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.532668] >ffff88800ef10a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.533516] ^ [ 32.534210] ffff88800ef10a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.535070] ffff88800ef10b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.535922] ================================================================== [ 32.537051] Disabling lock debugging due to kernel taint [ 35.021542] BUG: Bad rss-counter state mm:0000000095c2d69e type:MM_FILEPAGES val:33 [ 35.022949] BUG: Bad rss-counter state mm:0000000095c2d69e type:MM_ANONPAGES val:22 [ 35.556250] BUG: Bad rss-counter state mm:00000000b84ecd11 type:MM_FILEPAGES val:33 [ 35.557228] BUG: Bad rss-counter state mm:00000000b84ecd11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29247' (ECDSA) to the list of known hosts. 2023/06/19 11:43:50 fuzzer started 2023/06/19 11:43:50 dialing manager at localhost:44161 2023/06/19 11:43:50 checking machine... 2023/06/19 11:43:50 checking revisions... [ 36.243581] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:43:50 testing simple program... [ 36.281659] cgroup: Unknown subsys name 'net' [ 36.338237] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:48 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=00007fffff76ca88 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=00007f0a26fc75100000556745c66790 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=ffff888018f20000 RBX=ffffffff813ad420 RCX=ffff88806cf09b08 RDX=0000000000000000 RSI=ffff888018f20000 RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6996 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888018f20000 R15=ffff88801a23fc38 RIP=ffffffff81132a70 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 00007f04fed87900 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=00007f04fed3b01c CR3=0000000008ed4000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000