syzkaller login: [ 31.562084] BUG: Bad rss-counter state mm:00000000f5b10487 type:MM_FILEPAGES val:33 [ 31.563239] BUG: Bad rss-counter state mm:00000000f5b10487 type:MM_ANONPAGES val:22 [ 31.736750] ================================================================== [ 31.737758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.738844] Read of size 8 at addr ffff88800b352058 by task sshd/221 [ 31.739836] [ 31.740103] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.741082] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.742139] Call Trace: [ 31.742473] [ 31.742755] dump_stack_lvl+0x91/0xf0 [ 31.743263] print_report+0xcc/0x620 [ 31.743781] ? __virt_addr_valid+0x102/0x340 [ 31.744356] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.745051] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.745672] kasan_report+0xbe/0xf0 [ 31.746150] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.746787] vma_interval_tree_remove+0xc75/0xec0 [ 31.747449] vma_prepare+0xc54/0x11a0 [ 31.747956] __split_vma+0x5af/0x950 [ 31.748457] ? __pfx___split_vma+0x10/0x10 [ 31.749045] ? find_held_lock+0x2c/0x110 [ 31.749597] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.750195] ? lock_is_held_type+0x9f/0x120 [ 31.750773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.751420] ? mtree_range_walk+0x632/0x900 [ 31.752010] ? mas_walk+0x5c7/0x7c0 [ 31.752515] do_vmi_munmap+0x1f1/0x2b0 [ 31.753061] mmap_region+0x1f9/0x2660 [ 31.753570] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.754115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.754842] ? __pfx_lock_acquire+0x10/0x10 [ 31.755382] ? __pfx_mmap_region+0x10/0x10 [ 31.755915] ? security_mmap_addr+0x7d/0xa0 [ 31.756445] ? get_unmapped_area+0x1f5/0x3f0 [ 31.757011] do_mmap+0x854/0xf00 [ 31.757453] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.757946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.758504] ksys_mmap_pgoff+0x3af/0x500 [ 31.759013] do_syscall_64+0x3f/0x90 [ 31.759491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760138] RIP: 0033:0x7f41e9943d82 [ 31.760599] 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 [ 31.762714] RSP: 002b:00007ffec7cdfe98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.763654] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41e9943d82 [ 31.764531] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41e8d7d000 [ 31.765427] RBP: 00007f41e8d7d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.766304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7f45b1ec0 [ 31.767181] R13: 00007ffec7cdfeb0 R14: 00007ffec7cdfee0 R15: 00007ffec7ce0240 [ 31.768064] [ 31.768365] [ 31.768591] Allocated by task 214: [ 31.769040] kasan_save_stack+0x22/0x50 [ 31.769558] kasan_set_track+0x25/0x30 [ 31.770070] __kasan_slab_alloc+0x59/0x70 [ 31.770610] kmem_cache_alloc+0x16b/0x370 [ 31.771144] vm_area_dup+0x20/0x160 [ 31.771612] __split_vma+0x170/0x950 [ 31.772101] split_vma+0xc6/0x110 [ 31.772560] mprotect_fixup+0x8d2/0xb30 [ 31.773085] do_mprotect_pkey+0x87e/0xd40 [ 31.773623] __x64_sys_mprotect+0x78/0xc0 [ 31.774163] do_syscall_64+0x3f/0x90 [ 31.774658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775330] [ 31.775556] Freed by task 210: [ 31.775960] kasan_save_stack+0x22/0x50 [ 31.776478] kasan_set_track+0x25/0x30 [ 31.777027] kasan_save_free_info+0x2b/0x50 [ 31.777580] __kasan_slab_free+0x10a/0x190 [ 31.778129] kmem_cache_free+0x10d/0x4d0 [ 31.778657] rcu_core+0x8c8/0x2860 [ 31.779114] __do_softirq+0x1b7/0x7d4 [ 31.779610] [ 31.779833] Last potentially related work creation: [ 31.780439] kasan_save_stack+0x22/0x50 [ 31.780973] __kasan_record_aux_stack+0x8e/0xa0 [ 31.781567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.782228] remove_vma+0x139/0x170 [ 31.782692] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.783272] do_vmi_munmap+0x1f1/0x2b0 [ 31.783773] __vm_munmap+0x138/0x3a0 [ 31.784253] __x64_sys_munmap+0x59/0x80 [ 31.784780] do_syscall_64+0x3f/0x90 [ 31.785268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.785932] [ 31.786153] The buggy address belongs to the object at ffff88800b352000 [ 31.786153] which belongs to the cache vm_area_struct of size 168 [ 31.787677] The buggy address is located 88 bytes inside of [ 31.787677] freed 168-byte region [ffff88800b352000, ffff88800b3520a8) [ 31.789146] [ 31.789369] The buggy address belongs to the physical page: [ 31.790055] page:00000000f0a18ba3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb352 [ 31.791188] memcg:ffff88800e713a01 [ 31.791627] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.792295] page_type: 0xffffffff() [ 31.792773] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.793719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e713a01 [ 31.794658] page dumped because: kasan: bad access detected [ 31.795338] [ 31.795561] Memory state around the buggy address: [ 31.796162] ffff88800b351f00: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.797071] ffff88800b351f80: 00 00 00 00 00 00 00 00 00 03 fc fc fc fc fc fc [ 31.797956] >ffff88800b352000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.798839] ^ [ 31.799588] ffff88800b352080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.800470] ffff88800b352100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.801365] ================================================================== [ 31.802361] Disabling lock debugging due to kernel taint [ 33.621369] BUG: Bad rss-counter state mm:00000000177de386 type:MM_FILEPAGES val:33 [ 33.622416] BUG: Bad rss-counter state mm:00000000177de386 type:MM_ANONPAGES val:22 [ 34.090945] BUG: Bad rss-counter state mm:000000003524a0bb type:MM_FILEPAGES val:33 [ 34.092317] BUG: Bad rss-counter state mm:000000003524a0bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18824' (ECDSA) to the list of known hosts. 2023/06/21 03:16:14 fuzzer started 2023/06/21 03:16:15 dialing manager at localhost:36067 2023/06/21 03:16:15 checking machine... 2023/06/21 03:16:15 checking revisions... [ 34.885766] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:16:15 testing simple program... [ 34.936169] cgroup: Unknown subsys name 'net' [ 34.988525] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:16:14 Registers: info registers vcpu 0 RAX=ffffea0000722988 RBX=000000000000022f RCX=ffff88806ce40190 RDX=ffffea000036e088 RSI=1ffffd400006dc11 RDI=ffff88806ce40198 RBP=0000000000000000 RSP=ffff888008d9fbb0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000000000001bfc0 R12=0000000000000001 R13=dffffc0000000000 R14=ffffea0000722980 R15=ffff88806ce40140 RIP=ffffffff8178b8eb 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 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=00007fa30cbc1040 CR3=0000000016c74000 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=36313a3330203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383039 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a50 RCX=0000000000000001 RDX=1ffff1100d9e134c RSI=ffff88801673f8a0 RDI=ffff88806cf09a60 RBP=ffff88801673f8a0 RSP=ffff88806cf099a8 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffff888016738000 R14=ffff88801673f8a0 R15=ffff88806cf09a50 RIP=ffffffff81130468 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 00007fe3f2a35900 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=00007fe3f2a14020 CR3=000000000c69e000 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