syzkaller login: [ 31.425569] BUG: Bad rss-counter state mm:0000000056a4965a type:MM_FILEPAGES val:33 [ 31.426770] BUG: Bad rss-counter state mm:0000000056a4965a type:MM_ANONPAGES val:22 [ 31.461169] ================================================================== [ 31.462157] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.463175] Read of size 8 at addr ffff8880181dca50 by task sshd/220 [ 31.463924] [ 31.464132] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.464958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.465872] Call Trace: [ 31.466174] [ 31.466442] dump_stack_lvl+0x91/0xf0 [ 31.466912] print_report+0xcc/0x620 [ 31.467370] ? __virt_addr_valid+0x102/0x340 [ 31.467893] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.468477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.469070] kasan_report+0xbe/0xf0 [ 31.469524] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.470122] vma_interval_tree_remove+0xc75/0xec0 [ 31.470713] vma_prepare+0xc54/0x11a0 [ 31.471181] __split_vma+0x5af/0x950 [ 31.471648] ? __pfx___split_vma+0x10/0x10 [ 31.472170] ? find_held_lock+0x2c/0x110 [ 31.472687] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.473442] ? lock_is_held_type+0x9f/0x120 [ 31.473950] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.474519] ? mtree_range_walk+0x632/0x900 [ 31.475036] ? mas_walk+0x5c7/0x7c0 [ 31.475485] do_vmi_munmap+0x1f1/0x2b0 [ 31.475948] mmap_region+0x1f9/0x2660 [ 31.476401] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.476948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.477664] ? __pfx_lock_acquire+0x10/0x10 [ 31.478185] ? __pfx_mmap_region+0x10/0x10 [ 31.478714] ? security_mmap_addr+0x7d/0xa0 [ 31.479220] ? get_unmapped_area+0x1f5/0x3f0 [ 31.479763] do_mmap+0x854/0xf00 [ 31.480182] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.480661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.481245] ksys_mmap_pgoff+0x3af/0x500 [ 31.481753] do_syscall_64+0x3f/0x90 [ 31.482221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.482860] RIP: 0033:0x7f97a019cd82 [ 31.483308] 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 [ 31.485442] RSP: 002b:00007fff8d84a1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.486346] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97a019cd82 [ 31.487192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f979f5d6000 [ 31.488025] RBP: 00007f979f5d6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.488873] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3a1b33ec0 [ 31.489717] R13: 00007fff8d84a1e0 R14: 00007fff8d84a210 R15: 00007fff8d84a570 [ 31.490555] [ 31.490846] [ 31.491060] Allocated by task 213: [ 31.491491] kasan_save_stack+0x22/0x50 [ 31.491991] kasan_set_track+0x25/0x30 [ 31.492472] __kasan_slab_alloc+0x59/0x70 [ 31.493019] kmem_cache_alloc+0x16b/0x370 [ 31.493520] vm_area_dup+0x20/0x160 [ 31.493969] __split_vma+0x170/0x950 [ 31.494421] split_vma+0xc6/0x110 [ 31.494855] mprotect_fixup+0x8d2/0xb30 [ 31.495338] do_mprotect_pkey+0x87e/0xd40 [ 31.495841] __x64_sys_mprotect+0x78/0xc0 [ 31.496336] do_syscall_64+0x3f/0x90 [ 31.496805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.497431] [ 31.497636] Freed by task 213: [ 31.498017] kasan_save_stack+0x22/0x50 [ 31.498512] kasan_set_track+0x25/0x30 [ 31.498997] kasan_save_free_info+0x2b/0x50 [ 31.499516] __kasan_slab_free+0x10a/0x190 [ 31.500029] kmem_cache_free+0x10d/0x4d0 [ 31.500527] rcu_core+0x8c8/0x2860 [ 31.500966] __do_softirq+0x1b7/0x7d4 [ 31.501436] [ 31.501649] Last potentially related work creation: [ 31.502213] kasan_save_stack+0x22/0x50 [ 31.502713] __kasan_record_aux_stack+0x8e/0xa0 [ 31.503267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.503890] remove_vma+0x139/0x170 [ 31.504340] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.504904] do_vmi_munmap+0x1f1/0x2b0 [ 31.505387] __vm_munmap+0x138/0x3a0 [ 31.505846] __x64_sys_munmap+0x59/0x80 [ 31.506333] do_syscall_64+0x3f/0x90 [ 31.506803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.507426] [ 31.507640] The buggy address belongs to the object at ffff8880181dc9f8 [ 31.507640] which belongs to the cache vm_area_struct of size 168 [ 31.509111] The buggy address is located 88 bytes inside of [ 31.509111] freed 168-byte region [ffff8880181dc9f8, ffff8880181dcaa0) [ 31.510503] [ 31.510717] The buggy address belongs to the physical page: [ 31.511370] page:00000000cd507386 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181dc [ 31.512446] memcg:ffff888019ecaa01 [ 31.512883] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.513523] page_type: 0xffffffff() [ 31.513967] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.514873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ecaa01 [ 31.515756] page dumped because: kasan: bad access detected [ 31.516412] [ 31.516626] Memory state around the buggy address: [ 31.517200] ffff8880181dc900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.518054] ffff8880181dc980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.518894] >ffff8880181dca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.519744] ^ [ 31.520440] ffff8880181dca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.521297] ffff8880181dcb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.522139] ================================================================== [ 31.523449] Disabling lock debugging due to kernel taint [ 34.112888] BUG: Bad rss-counter state mm:000000009b19f551 type:MM_FILEPAGES val:33 [ 34.113970] BUG: Bad rss-counter state mm:000000009b19f551 type:MM_ANONPAGES val:22 [ 34.528313] BUG: Bad rss-counter state mm:00000000f233bc6a type:MM_FILEPAGES val:33 [ 34.529104] BUG: Bad rss-counter state mm:00000000f233bc6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48637' (ECDSA) to the list of known hosts. 2023/06/20 13:39:12 fuzzer started 2023/06/20 13:39:13 dialing manager at localhost:36067 2023/06/20 13:39:13 checking machine... 2023/06/20 13:39:13 checking revisions... [ 35.270452] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:39:13 testing simple program... [ 35.335994] cgroup: Unknown subsys name 'net' [ 35.396299] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:39:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b10 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806ce09a78 RBP=ffff888015d53680 RSP=ffff88806ce09a20 R8 =0000000000000540 R9 =0000000000000000 R10=ffff88806ce09a78 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88806ce09aa0 R14=ffff888015d53680 R15=ffff88806ce09a78 RIP=ffffffff8451340a RFL=00000247 [---Z-PC] 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 00007f433b650700 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=00007fa094f8f0b0 CR3=000000000f5cc000 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=2032313a39333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a39333a3331203032 XMM08=00000000000000000000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff8880180e77f8 RDX=1ffff1100301ceeb RSI=ffffffff813ad720 RDI=ffff8880180e7758 RBP=ffff8880180e77f0 RSP=ffff8880180e76e8 R8 =0000000000000001 R9 =ffff8880180e7798 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880180e7820 R13=0000000000000000 R14=ffff888019f00000 R15=ffff8880180e7758 RIP=ffffffff8113060b 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 00007fa0949d7900 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=00007ffedf14d000 CR3=000000001a69c000 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