syzkaller login: [ 61.550975] BUG: Bad rss-counter state mm:0000000007f3957a type:MM_FILEPAGES val:33 [ 61.552414] BUG: Bad rss-counter state mm:0000000007f3957a type:MM_ANONPAGES val:22 [ 61.698389] ================================================================== [ 61.699199] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.700039] Read of size 8 at addr ffff88800df67880 by task sshd/221 [ 61.700717] [ 61.700917] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.701696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.702757] Call Trace: [ 61.703044] [ 61.703306] dump_stack_lvl+0x91/0xf0 [ 61.703749] print_report+0xcc/0x620 [ 61.704162] ? __virt_addr_valid+0x102/0x340 [ 61.704635] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.705179] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.705673] kasan_report+0xbe/0xf0 [ 61.706012] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.706453] vma_interval_tree_remove+0xc75/0xec0 [ 61.706902] vma_prepare+0xc54/0x11a0 [ 61.707242] __split_vma+0x5af/0x950 [ 61.707576] ? __pfx___split_vma+0x10/0x10 [ 61.707948] ? find_held_lock+0x2c/0x110 [ 61.708322] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.708721] ? lock_is_held_type+0x9f/0x120 [ 61.709100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.709558] ? mtree_range_walk+0x632/0x900 [ 61.709976] ? mas_walk+0x5c7/0x7c0 [ 61.710313] do_vmi_munmap+0x1f1/0x2b0 [ 61.710673] mmap_region+0x1f9/0x2660 [ 61.711016] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.711379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.711883] ? __pfx_lock_acquire+0x10/0x10 [ 61.712260] ? __pfx_mmap_region+0x10/0x10 [ 61.712639] ? security_mmap_addr+0x7d/0xa0 [ 61.713012] ? get_unmapped_area+0x1f5/0x3f0 [ 61.713426] do_mmap+0x854/0xf00 [ 61.713740] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.714097] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.714514] ksys_mmap_pgoff+0x3af/0x500 [ 61.714959] do_syscall_64+0x3f/0x90 [ 61.715328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.715790] RIP: 0033:0x7f81143fdd82 [ 61.716115] 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 [ 61.717687] RSP: 002b:00007ffd961b4d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.718507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81143fdd82 [ 61.719164] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8113837000 [ 61.719766] RBP: 00007f8113837000 R08: 0000000000000009 R09: 0000000000001000 [ 61.720359] R10: 0000000000000812 R11: 0000000000000206 R12: 000056515c0e6ec0 [ 61.720953] R13: 00007ffd961b4d60 R14: 00007ffd961b4d90 R15: 00007ffd961b50f0 [ 61.721554] [ 61.721763] [ 61.721918] Allocated by task 214: [ 61.722221] kasan_save_stack+0x22/0x50 [ 61.722579] kasan_set_track+0x25/0x30 [ 61.722940] __kasan_slab_alloc+0x59/0x70 [ 61.723309] kmem_cache_alloc+0x16b/0x370 [ 61.723674] vm_area_dup+0x20/0x160 [ 61.723997] __split_vma+0x170/0x950 [ 61.724328] split_vma+0xc6/0x110 [ 61.724645] mprotect_fixup+0x8d2/0xb30 [ 61.725002] do_mprotect_pkey+0x87e/0xd40 [ 61.725370] __x64_sys_mprotect+0x78/0xc0 [ 61.725740] do_syscall_64+0x3f/0x90 [ 61.726080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.726536] [ 61.726695] Freed by task 214: [ 61.726973] kasan_save_stack+0x22/0x50 [ 61.727329] kasan_set_track+0x25/0x30 [ 61.727681] kasan_save_free_info+0x2b/0x50 [ 61.728057] __kasan_slab_free+0x10a/0x190 [ 61.728433] kmem_cache_free+0x10d/0x4d0 [ 61.728795] rcu_core+0x8c8/0x2860 [ 61.729113] __do_softirq+0x1b7/0x7d4 [ 61.729451] [ 61.729606] Last potentially related work creation: [ 61.730022] kasan_save_stack+0x22/0x50 [ 61.730381] __kasan_record_aux_stack+0x8e/0xa0 [ 61.730813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.731269] remove_vma+0x139/0x170 [ 61.731591] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.731990] do_vmi_munmap+0x1f1/0x2b0 [ 61.732334] __vm_munmap+0x138/0x3a0 [ 61.732667] __x64_sys_munmap+0x59/0x80 [ 61.733024] do_syscall_64+0x3f/0x90 [ 61.733360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.733814] [ 61.733969] The buggy address belongs to the object at ffff88800df67828 [ 61.733969] which belongs to the cache vm_area_struct of size 168 [ 61.735015] The buggy address is located 88 bytes inside of [ 61.735015] freed 168-byte region [ffff88800df67828, ffff88800df678d0) [ 61.736001] [ 61.736154] The buggy address belongs to the physical page: [ 61.736624] page:00000000fa338d1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf67 [ 61.737390] memcg:ffff888017e60e01 [ 61.737689] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.738143] page_type: 0xffffffff() [ 61.738466] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.739132] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e60e01 [ 61.739773] page dumped because: kasan: bad access detected [ 61.740240] [ 61.740395] Memory state around the buggy address: [ 61.740803] ffff88800df67780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.741408] ffff88800df67800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.742022] >ffff88800df67880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.742634] ^ [ 61.742930] ffff88800df67900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.743535] ffff88800df67980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.744138] ================================================================== [ 61.744979] Disabling lock debugging due to kernel taint [ 64.200299] BUG: Bad rss-counter state mm:00000000249408d3 type:MM_FILEPAGES val:33 [ 64.201502] BUG: Bad rss-counter state mm:00000000249408d3 type:MM_ANONPAGES val:22 [ 64.650412] BUG: Bad rss-counter state mm:000000009d11e33a type:MM_FILEPAGES val:33 [ 64.651605] BUG: Bad rss-counter state mm:000000009d11e33a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9492' (ECDSA) to the list of known hosts. 2023/06/19 18:30:28 fuzzer started 2023/06/19 18:30:28 dialing manager at localhost:44161 2023/06/19 18:30:28 checking machine... 2023/06/19 18:30:28 checking revisions... [ 65.354777] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:30:28 testing simple program... [ 65.408391] cgroup: Unknown subsys name 'net' [ 65.494197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:30:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff84531e74 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8540a108 RSP=ffff888008d7fe50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff8135b930 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 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=00007f334afb50b0 CR3=0000000015a9c000 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=30333a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343633 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=ffffffff85d3bed0 RBX=0000000000000001 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff88800f42f8d8 R8 =0000000000000000 R9 =ffffed1001975c3a R10=ffff88800cbae1d3 R11=0000000000000000 R12=ffff88800cbae1b8 R13=ffff88800f42fa48 R14=ffff88801a1d9c80 R15=0000000000000293 RIP=ffffffff8180eeb6 RFL=00000002 [-------] 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 00007f334a9fd900 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=00007fff623ca000 CR3=000000000de22000 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