syzkaller login: [ 38.735127] BUG: Bad rss-counter state mm:000000009b0b9036 type:MM_FILEPAGES val:33 [ 38.736337] BUG: Bad rss-counter state mm:000000009b0b9036 type:MM_ANONPAGES val:22 [ 38.775640] ================================================================== [ 38.776629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.777646] Read of size 8 at addr ffff888016edb140 by task sshd/219 [ 38.778410] [ 38.778631] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.779493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.780468] Call Trace: [ 38.780808] [ 38.781094] dump_stack_lvl+0x91/0xf0 [ 38.781588] print_report+0xcc/0x620 [ 38.782073] ? __virt_addr_valid+0x102/0x340 [ 38.782628] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.783248] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.783873] kasan_report+0xbe/0xf0 [ 38.784359] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.785009] vma_interval_tree_remove+0xc75/0xec0 [ 38.785651] vma_prepare+0xc54/0x11a0 [ 38.786155] __split_vma+0x5af/0x950 [ 38.786665] ? __pfx___split_vma+0x10/0x10 [ 38.787222] ? find_held_lock+0x2c/0x110 [ 38.787779] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.788383] ? lock_is_held_type+0x9f/0x120 [ 38.789008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.789673] ? mtree_range_walk+0x632/0x900 [ 38.790257] ? mas_walk+0x5c7/0x7c0 [ 38.790760] do_vmi_munmap+0x1f1/0x2b0 [ 38.791284] mmap_region+0x1f9/0x2660 [ 38.791807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.792346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.793133] ? __pfx_lock_acquire+0x10/0x10 [ 38.793692] ? __pfx_mmap_region+0x10/0x10 [ 38.794250] ? security_mmap_addr+0x7d/0xa0 [ 38.794826] ? get_unmapped_area+0x1f5/0x3f0 [ 38.795423] do_mmap+0x854/0xf00 [ 38.795887] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.796408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.797038] ksys_mmap_pgoff+0x3af/0x500 [ 38.797584] do_syscall_64+0x3f/0x90 [ 38.798095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.798793] RIP: 0033:0x7f9102fbed82 [ 38.799288] 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 [ 38.801552] RSP: 002b:00007ffc8d4fe048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.802497] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9102fbed82 [ 38.803409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91023f8000 [ 38.804328] RBP: 00007f91023f8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.805245] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628b92c0ec0 [ 38.806164] R13: 00007ffc8d4fe060 R14: 00007ffc8d4fe090 R15: 00007ffc8d4fe3f0 [ 38.807095] [ 38.807412] [ 38.807641] Allocated by task 212: [ 38.808109] kasan_save_stack+0x22/0x50 [ 38.808667] kasan_set_track+0x25/0x30 [ 38.809189] __kasan_slab_alloc+0x59/0x70 [ 38.809763] kmem_cache_alloc+0x16b/0x370 [ 38.810330] vm_area_dup+0x20/0x160 [ 38.810823] __split_vma+0x170/0x950 [ 38.811318] split_vma+0xc6/0x110 [ 38.811776] mprotect_fixup+0x8d2/0xb30 [ 38.812315] do_mprotect_pkey+0x87e/0xd40 [ 38.812874] __x64_sys_mprotect+0x78/0xc0 [ 38.813421] do_syscall_64+0x3f/0x90 [ 38.813935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.814611] [ 38.814843] Freed by task 212: [ 38.815265] kasan_save_stack+0x22/0x50 [ 38.815792] kasan_set_track+0x25/0x30 [ 38.816308] kasan_save_free_info+0x2b/0x50 [ 38.816900] __kasan_slab_free+0x10a/0x190 [ 38.817481] kmem_cache_free+0x10d/0x4d0 [ 38.818029] rcu_core+0x8c8/0x2860 [ 38.818504] __do_softirq+0x1b7/0x7d4 [ 38.819024] [ 38.819258] Last potentially related work creation: [ 38.819887] kasan_save_stack+0x22/0x50 [ 38.820416] __kasan_record_aux_stack+0x8e/0xa0 [ 38.821044] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.821713] remove_vma+0x139/0x170 [ 38.822191] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.822794] do_vmi_munmap+0x1f1/0x2b0 [ 38.823326] __vm_munmap+0x138/0x3a0 [ 38.823829] __x64_sys_munmap+0x59/0x80 [ 38.824366] do_syscall_64+0x3f/0x90 [ 38.824902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.825603] [ 38.825834] The buggy address belongs to the object at ffff888016edb0e8 [ 38.825834] which belongs to the cache vm_area_struct of size 168 [ 38.827436] The buggy address is located 88 bytes inside of [ 38.827436] freed 168-byte region [ffff888016edb0e8, ffff888016edb190) [ 38.828957] [ 38.829189] The buggy address belongs to the physical page: [ 38.829901] page:000000008fb191f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16edb [ 38.831087] memcg:ffff8880144da401 [ 38.831546] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.832243] page_type: 0xffffffff() [ 38.832766] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.833754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144da401 [ 38.834697] page dumped because: kasan: bad access detected [ 38.835413] [ 38.835646] Memory state around the buggy address: [ 38.836270] ffff888016edb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.837210] ffff888016edb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.838131] >ffff888016edb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.839052] ^ [ 38.839748] ffff888016edb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.840672] ffff888016edb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.841589] ================================================================== [ 38.842747] Disabling lock debugging due to kernel taint [ 41.299366] BUG: Bad rss-counter state mm:000000004c17b5da type:MM_FILEPAGES val:33 [ 41.300366] BUG: Bad rss-counter state mm:000000004c17b5da type:MM_ANONPAGES val:22 [ 41.839181] BUG: Bad rss-counter state mm:0000000015954101 type:MM_FILEPAGES val:33 [ 41.840354] BUG: Bad rss-counter state mm:0000000015954101 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40557' (ECDSA) to the list of known hosts. 2023/06/20 19:06:35 fuzzer started 2023/06/20 19:06:35 dialing manager at localhost:36067 2023/06/20 19:06:35 checking machine... 2023/06/20 19:06:35 checking revisions... [ 42.483361] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:06:35 testing simple program... [ 42.524490] cgroup: Unknown subsys name 'net' [ 42.614406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:06:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff11001fe940e RSI=ffffffff81abdf24 RDI=ffff88800ff4a070 RBP=ffff88800ff48000 RSP=ffff888016a8f5e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880095fcac8 R13=0000000000000000 R14=ffff88800ff48600 R15=0000000000000000 RIP=ffffffff84511dc0 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 00007faf697da700 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=00007f91658d9f20 CR3=0000000014708000 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=2035333a36303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a36303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000f RBX=00007ffd7bde1ee0 RCX=00007f1b8477b180 RDX=00007f1b83bdd050 RSI=00007ffd7bde1d90 RDI=0000000000000000 RBP=00007ffd7bde2010 RSP=00007ffd7bde1d90 R8 =0000000000000009 R9 =00007ffd7bde1f10 R10=000000000000002a R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000002a R15=0000000000000000 RIP=00007f1b84763ada RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1b83bd8900 00000000 00000000 GS =0000 0000000000000000 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=00007f1b83ba7008 CR3=000000000ed70000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000