syzkaller login: [ 31.196309] BUG: Bad rss-counter state mm:00000000e91816c1 type:MM_FILEPAGES val:33 [ 31.197463] BUG: Bad rss-counter state mm:00000000e91816c1 type:MM_ANONPAGES val:22 [ 31.358256] ================================================================== [ 31.359153] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.360087] Read of size 8 at addr ffff88800dd7e228 by task sshd/219 [ 31.360867] [ 31.361145] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.362036] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.363042] Call Trace: [ 31.363363] [ 31.363647] dump_stack_lvl+0x91/0xf0 [ 31.364130] print_report+0xcc/0x620 [ 31.364621] ? __virt_addr_valid+0x102/0x340 [ 31.365191] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365838] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.366489] kasan_report+0xbe/0xf0 [ 31.366971] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367592] vma_interval_tree_remove+0xc75/0xec0 [ 31.368193] vma_prepare+0xc54/0x11a0 [ 31.368668] __split_vma+0x5af/0x950 [ 31.369139] ? __pfx___split_vma+0x10/0x10 [ 31.369685] ? find_held_lock+0x2c/0x110 [ 31.370207] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.370791] ? lock_is_held_type+0x9f/0x120 [ 31.371338] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.371964] ? mtree_range_walk+0x632/0x900 [ 31.372534] ? mas_walk+0x5c7/0x7c0 [ 31.373008] do_vmi_munmap+0x1f1/0x2b0 [ 31.373519] mmap_region+0x1f9/0x2660 [ 31.374018] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.374545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.375281] ? __pfx_lock_acquire+0x10/0x10 [ 31.375834] ? __pfx_mmap_region+0x10/0x10 [ 31.376383] ? security_mmap_addr+0x7d/0xa0 [ 31.376924] ? get_unmapped_area+0x1f5/0x3f0 [ 31.377500] do_mmap+0x854/0xf00 [ 31.377964] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.378461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.379032] ksys_mmap_pgoff+0x3af/0x500 [ 31.379541] do_syscall_64+0x3f/0x90 [ 31.380026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380672] RIP: 0033:0x7f3b1d390d82 [ 31.381139] 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 [ 31.383266] RSP: 002b:00007ffcc67d4858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.384175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b1d390d82 [ 31.385023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b1c7ca000 [ 31.385875] RBP: 00007f3b1c7ca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.386723] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562562e7aec0 [ 31.387576] R13: 00007ffcc67d4870 R14: 00007ffcc67d48a0 R15: 00007ffcc67d4c00 [ 31.388448] [ 31.388748] [ 31.388964] Allocated by task 212: [ 31.389395] kasan_save_stack+0x22/0x50 [ 31.389933] kasan_set_track+0x25/0x30 [ 31.390430] __kasan_slab_alloc+0x59/0x70 [ 31.390961] kmem_cache_alloc+0x16b/0x370 [ 31.391485] vm_area_dup+0x20/0x160 [ 31.391960] __split_vma+0x170/0x950 [ 31.392437] split_vma+0xc6/0x110 [ 31.392887] mprotect_fixup+0x8d2/0xb30 [ 31.393391] do_mprotect_pkey+0x87e/0xd40 [ 31.393929] __x64_sys_mprotect+0x78/0xc0 [ 31.394481] do_syscall_64+0x3f/0x90 [ 31.394974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395630] [ 31.395850] Freed by task 212: [ 31.396261] kasan_save_stack+0x22/0x50 [ 31.396801] kasan_set_track+0x25/0x30 [ 31.397325] kasan_save_free_info+0x2b/0x50 [ 31.397895] __kasan_slab_free+0x10a/0x190 [ 31.398459] kmem_cache_free+0x10d/0x4d0 [ 31.399001] rcu_core+0x8c8/0x2860 [ 31.399471] __do_softirq+0x1b7/0x7d4 [ 31.399980] [ 31.400203] Last potentially related work creation: [ 31.400824] kasan_save_stack+0x22/0x50 [ 31.401351] __kasan_record_aux_stack+0x8e/0xa0 [ 31.401990] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.402664] remove_vma+0x139/0x170 [ 31.403142] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.403725] do_vmi_munmap+0x1f1/0x2b0 [ 31.404235] __vm_munmap+0x138/0x3a0 [ 31.404732] __x64_sys_munmap+0x59/0x80 [ 31.405253] do_syscall_64+0x3f/0x90 [ 31.405773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.406457] [ 31.406686] The buggy address belongs to the object at ffff88800dd7e1d0 [ 31.406686] which belongs to the cache vm_area_struct of size 168 [ 31.408270] The buggy address is located 88 bytes inside of [ 31.408270] freed 168-byte region [ffff88800dd7e1d0, ffff88800dd7e278) [ 31.409788] [ 31.410016] The buggy address belongs to the physical page: [ 31.410726] page:000000008942553e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd7e [ 31.411892] memcg:ffff888009512a01 [ 31.412348] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.413039] page_type: 0xffffffff() [ 31.413518] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.414507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009512a01 [ 31.415480] page dumped because: kasan: bad access detected [ 31.416194] [ 31.416421] Memory state around the buggy address: [ 31.417046] ffff88800dd7e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.417967] ffff88800dd7e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.418898] >ffff88800dd7e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.419821] ^ [ 31.420411] ffff88800dd7e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.421343] ffff88800dd7e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.422259] ================================================================== [ 31.423280] Disabling lock debugging due to kernel taint [ 33.182213] BUG: Bad rss-counter state mm:0000000093ef73a8 type:MM_FILEPAGES val:33 [ 33.182968] BUG: Bad rss-counter state mm:0000000093ef73a8 type:MM_ANONPAGES val:22 [ 33.617414] BUG: Bad rss-counter state mm:00000000f22ad580 type:MM_FILEPAGES val:33 [ 33.618351] BUG: Bad rss-counter state mm:00000000f22ad580 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45804' (ECDSA) to the list of known hosts. 2023/06/20 02:49:53 fuzzer started 2023/06/20 02:49:53 dialing manager at localhost:44161 2023/06/20 02:49:53 checking machine... 2023/06/20 02:49:53 checking revisions... [ 34.316639] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:49:54 testing simple program... [ 34.365723] cgroup: Unknown subsys name 'net' [ 34.435424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f7ca7c09a30 CR3=000000000c6ee000 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=00000000000000000000000000000000 XMM01=3d4b360210013d9343412bbb07db03f8 XMM02=eff9b2d0a8fce9cb000000000011c250 XMM03=2c67c8bc2e329bc3000000000011c378 XMM04=eb4c9999ab3199eb00000000000ae988 XMM05=e50baed58e9d9a290000000000134548 XMM06=f28be461456ff79400000000001332e8 XMM07=fb795ef6d65770560000000000123818 XMM08=2c67c8bc2e329bc3000000000011c378 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf3de20 RCX=0000000000000000 RDX=00000000800d000d RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff88801cdcf9b0 RSP=ffff88801cdcf8f0 R8 =00000000000d000d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=ffffea000025b580 R15=ffff88806cf3de00 RIP=ffffffff81806d2e 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 00007fa266f6f900 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=00007fff4d6c6000 CR3=000000000d802000 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