syzkaller login: [ 30.661248] BUG: Bad rss-counter state mm:000000008fae06ed type:MM_FILEPAGES val:33 [ 30.662219] BUG: Bad rss-counter state mm:000000008fae06ed type:MM_ANONPAGES val:22 [ 30.702914] ================================================================== [ 30.703973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.705077] Read of size 8 at addr ffff88800d151310 by task sshd/221 [ 30.706118] [ 30.706373] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.707375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.708545] Call Trace: [ 30.708918] [ 30.709250] dump_stack_lvl+0x91/0xf0 [ 30.709825] print_report+0xcc/0x620 [ 30.710395] ? __virt_addr_valid+0x102/0x340 [ 30.711034] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.711755] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712519] kasan_report+0xbe/0xf0 [ 30.713098] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.713844] vma_interval_tree_remove+0xc75/0xec0 [ 30.714558] vma_prepare+0xc54/0x11a0 [ 30.715137] __split_vma+0x5af/0x950 [ 30.715713] ? __pfx___split_vma+0x10/0x10 [ 30.716390] ? find_held_lock+0x2c/0x110 [ 30.717021] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.717697] ? lock_is_held_type+0x9f/0x120 [ 30.718344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.719070] ? mtree_range_walk+0x632/0x900 [ 30.719733] ? mas_walk+0x5c7/0x7c0 [ 30.720327] do_vmi_munmap+0x1f1/0x2b0 [ 30.720923] mmap_region+0x1f9/0x2660 [ 30.721505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.722113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.722977] ? __pfx_lock_acquire+0x10/0x10 [ 30.723621] ? __pfx_mmap_region+0x10/0x10 [ 30.724274] ? security_mmap_addr+0x7d/0xa0 [ 30.724913] ? get_unmapped_area+0x1f5/0x3f0 [ 30.725581] do_mmap+0x854/0xf00 [ 30.726116] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.726713] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.727393] ksys_mmap_pgoff+0x3af/0x500 [ 30.728006] do_syscall_64+0x3f/0x90 [ 30.728614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729391] RIP: 0033:0x7f58bc464d82 [ 30.729940] 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 [ 30.732516] RSP: 002b:00007ffc8a5c8238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.733606] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58bc464d82 [ 30.734626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58bb89e000 [ 30.735646] RBP: 00007f58bb89e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.736680] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582b9255b20 [ 30.737695] R13: 00007ffc8a5c8250 R14: 00007ffc8a5c8280 R15: 00007ffc8a5c85e0 [ 30.738729] [ 30.739084] [ 30.739338] Allocated by task 214: [ 30.739850] kasan_save_stack+0x22/0x50 [ 30.740463] kasan_set_track+0x25/0x30 [ 30.741058] __kasan_slab_alloc+0x59/0x70 [ 30.741691] kmem_cache_alloc+0x16b/0x370 [ 30.742307] vm_area_dup+0x20/0x160 [ 30.742854] __split_vma+0x170/0x950 [ 30.743414] split_vma+0xc6/0x110 [ 30.743943] mprotect_fixup+0x8d2/0xb30 [ 30.744570] do_mprotect_pkey+0x87e/0xd40 [ 30.745192] __x64_sys_mprotect+0x78/0xc0 [ 30.745816] do_syscall_64+0x3f/0x90 [ 30.746389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747163] [ 30.747420] Freed by task 214: [ 30.747888] kasan_save_stack+0x22/0x50 [ 30.748500] kasan_set_track+0x25/0x30 [ 30.749094] kasan_save_free_info+0x2b/0x50 [ 30.749732] __kasan_slab_free+0x10a/0x190 [ 30.750369] kmem_cache_free+0x10d/0x4d0 [ 30.750977] rcu_core+0x8c8/0x2860 [ 30.751506] __do_softirq+0x1b7/0x7d4 [ 30.752071] [ 30.752340] Last potentially related work creation: [ 30.753051] kasan_save_stack+0x22/0x50 [ 30.753647] __kasan_record_aux_stack+0x8e/0xa0 [ 30.754326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.755097] remove_vma+0x139/0x170 [ 30.755639] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.756325] do_vmi_munmap+0x1f1/0x2b0 [ 30.756919] __vm_munmap+0x138/0x3a0 [ 30.757483] __x64_sys_munmap+0x59/0x80 [ 30.758070] do_syscall_64+0x3f/0x90 [ 30.758633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.759398] [ 30.759654] The buggy address belongs to the object at ffff88800d1512b8 [ 30.759654] which belongs to the cache vm_area_struct of size 168 [ 30.761427] The buggy address is located 88 bytes inside of [ 30.761427] freed 168-byte region [ffff88800d1512b8, ffff88800d151360) [ 30.763101] [ 30.763353] The buggy address belongs to the physical page: [ 30.764158] page:0000000024ff0452 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd151 [ 30.765450] memcg:ffff888016809501 [ 30.765958] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.766737] page_type: 0xffffffff() [ 30.767271] raw: 0100000000000200 ffff8880087a0c80 ffffea0000516b80 000000000000000a [ 30.768383] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016809501 [ 30.769478] page dumped because: kasan: bad access detected [ 30.770275] [ 30.770530] Memory state around the buggy address: [ 30.771235] ffff88800d151200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.772296] ffff88800d151280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.773322] >ffff88800d151300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.774335] ^ [ 30.774889] ffff88800d151380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.775913] ffff88800d151400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.776939] ================================================================== [ 30.778367] Disabling lock debugging due to kernel taint [ 32.919395] BUG: Bad rss-counter state mm:000000008ee86c7c type:MM_FILEPAGES val:33 [ 32.920422] BUG: Bad rss-counter state mm:000000008ee86c7c type:MM_ANONPAGES val:22 [ 33.435551] BUG: Bad rss-counter state mm:00000000d79de909 type:MM_FILEPAGES val:33 [ 33.436750] BUG: Bad rss-counter state mm:00000000d79de909 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34247' (ECDSA) to the list of known hosts. 2023/06/20 16:22:15 fuzzer started 2023/06/20 16:22:15 dialing manager at localhost:36067 2023/06/20 16:22:15 checking machine... 2023/06/20 16:22:15 checking revisions... [ 34.044270] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:22:15 testing simple program... [ 34.087942] cgroup: Unknown subsys name 'net' [ 34.168612] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8118ddc3 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888010249b40 R15=ffff88801a641c38 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007fadf07de900 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=00007fadefc53d90 CR3=000000000f60e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dbebc746a352a0cc00000000000ae988 XMM05=3366f3ca697636740000000000131fe0 XMM06=e4cb8bb95a7664b60000000000131128 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffbabc969 RBX=ffffffff85e0aa6c RCX=ffffffff818c73ed RDX=0000000000000000 RSI=ffffffff8614bdec RDI=ffffffff85e0aa5c RBP=ffffffff85e0aa5c RSP=ffff888015def878 R8 =ffffffff8614bdec R9 =ffff888015def970 R10=0000000000038001 R11=0000000000024026 R12=ffffffff85e0aa7c R13=ffffffff85e0aa5c R14=ffffffff85e0aa5c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007fe5c3502900 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=00007fffd1712000 CR3=000000000d0ae000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000