syzkaller login: [ 35.244428] BUG: Bad rss-counter state mm:0000000074ee48a6 type:MM_FILEPAGES val:33 [ 35.246080] BUG: Bad rss-counter state mm:0000000074ee48a6 type:MM_ANONPAGES val:22 [ 35.416792] ================================================================== [ 35.417885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.419075] Read of size 8 at addr ffff88800fb11140 by task sshd/220 [ 35.420180] [ 35.420425] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.421310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.422327] Call Trace: [ 35.422665] [ 35.422959] dump_stack_lvl+0x91/0xf0 [ 35.423474] print_report+0xcc/0x620 [ 35.423976] ? __virt_addr_valid+0x102/0x340 [ 35.424561] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.425193] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.425838] kasan_report+0xbe/0xf0 [ 35.426317] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.426950] vma_interval_tree_remove+0xc75/0xec0 [ 35.427586] vma_prepare+0xc54/0x11a0 [ 35.428090] __split_vma+0x5af/0x950 [ 35.428596] ? __pfx___split_vma+0x10/0x10 [ 35.429128] ? find_held_lock+0x2c/0x110 [ 35.429681] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.430265] ? lock_is_held_type+0x9f/0x120 [ 35.430831] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.431447] ? mtree_range_walk+0x632/0x900 [ 35.432032] ? mas_walk+0x5c7/0x7c0 [ 35.432527] do_vmi_munmap+0x1f1/0x2b0 [ 35.433023] mmap_region+0x1f9/0x2660 [ 35.433522] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.434039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.434767] ? __pfx_lock_acquire+0x10/0x10 [ 35.435307] ? __pfx_mmap_region+0x10/0x10 [ 35.435876] ? security_mmap_addr+0x7d/0xa0 [ 35.436425] ? get_unmapped_area+0x1f5/0x3f0 [ 35.436986] do_mmap+0x854/0xf00 [ 35.437438] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.437938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.438522] ksys_mmap_pgoff+0x3af/0x500 [ 35.439030] do_syscall_64+0x3f/0x90 [ 35.439521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.440186] RIP: 0033:0x7f266569ad82 [ 35.440663] 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 [ 35.442821] RSP: 002b:00007fffec0ad5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.443774] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f266569ad82 [ 35.444640] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2664ad4000 [ 35.445506] RBP: 00007f2664ad4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.446348] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f15185ed90 [ 35.447206] R13: 00007fffec0ad5c0 R14: 00007fffec0ad5f0 R15: 00007fffec0ad950 [ 35.448086] [ 35.448383] [ 35.448608] Allocated by task 213: [ 35.449041] kasan_save_stack+0x22/0x50 [ 35.449563] kasan_set_track+0x25/0x30 [ 35.450057] __kasan_slab_alloc+0x59/0x70 [ 35.450607] kmem_cache_alloc+0x16b/0x370 [ 35.451123] vm_area_dup+0x20/0x160 [ 35.451594] __split_vma+0x170/0x950 [ 35.452077] split_vma+0xc6/0x110 [ 35.452535] mprotect_fixup+0x8d2/0xb30 [ 35.453040] do_mprotect_pkey+0x87e/0xd40 [ 35.453568] __x64_sys_mprotect+0x78/0xc0 [ 35.454087] do_syscall_64+0x3f/0x90 [ 35.454580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.455228] [ 35.455456] Freed by task 204: [ 35.455872] kasan_save_stack+0x22/0x50 [ 35.456376] kasan_set_track+0x25/0x30 [ 35.456878] kasan_save_free_info+0x2b/0x50 [ 35.457419] __kasan_slab_free+0x10a/0x190 [ 35.457957] kmem_cache_free+0x10d/0x4d0 [ 35.458478] rcu_core+0x8c8/0x2860 [ 35.458920] __do_softirq+0x1b7/0x7d4 [ 35.459407] [ 35.459633] Last potentially related work creation: [ 35.460218] kasan_save_stack+0x22/0x50 [ 35.460732] __kasan_record_aux_stack+0x8e/0xa0 [ 35.461302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.461952] remove_vma+0x139/0x170 [ 35.462424] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.462987] do_vmi_munmap+0x1f1/0x2b0 [ 35.463486] __vm_munmap+0x138/0x3a0 [ 35.463978] __x64_sys_munmap+0x59/0x80 [ 35.464486] do_syscall_64+0x3f/0x90 [ 35.464965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.465621] [ 35.465839] The buggy address belongs to the object at ffff88800fb110e8 [ 35.465839] which belongs to the cache vm_area_struct of size 168 [ 35.467309] The buggy address is located 88 bytes inside of [ 35.467309] freed 168-byte region [ffff88800fb110e8, ffff88800fb11190) [ 35.468742] [ 35.468958] The buggy address belongs to the physical page: [ 35.469627] page:00000000b1447680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb11 [ 35.470724] memcg:ffff88800f663f01 [ 35.471153] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.471822] page_type: 0xffffffff() [ 35.472271] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.473199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f663f01 [ 35.474110] page dumped because: kasan: bad access detected [ 35.474771] [ 35.474989] Memory state around the buggy address: [ 35.475576] ffff88800fb11000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.476490] ffff88800fb11080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.477416] >ffff88800fb11100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.478267] ^ [ 35.478923] ffff88800fb11180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.479808] ffff88800fb11200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.480672] ================================================================== [ 35.481662] Disabling lock debugging due to kernel taint [ 37.309673] BUG: Bad rss-counter state mm:00000000b6504b13 type:MM_FILEPAGES val:33 [ 37.310473] BUG: Bad rss-counter state mm:00000000b6504b13 type:MM_ANONPAGES val:22 [ 37.824308] BUG: Bad rss-counter state mm:000000009d554bcf type:MM_FILEPAGES val:33 [ 37.825455] BUG: Bad rss-counter state mm:000000009d554bcf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38168' (ECDSA) to the list of known hosts. 2023/06/20 12:28:15 fuzzer started 2023/06/20 12:28:16 dialing manager at localhost:36067 2023/06/20 12:28:16 checking machine... 2023/06/20 12:28:16 checking revisions... [ 38.426888] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:28:16 testing simple program... [ 38.476860] cgroup: Unknown subsys name 'net' [ 38.515200] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:28:15 Registers: info registers vcpu 0 RAX=00007ffc6720a4c8 RBX=1ffff1100300bfa2 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff836339fb RDI=ffffffff85d3d350 RBP=00007ffc6720a4c8 RSP=ffff88801805fcb8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007ffc6720a4cc R13=000000000000000c R14=ffff88801805fe10 R15=00007ffc6720a4cc RIP=ffffffff84501f41 RFL=00040202 [-------] 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 00007ffbbf2a5900 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=00007ffc6720b000 CR3=000000000e3aa000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f9bf712f9d0 CR3=0000000009570000 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=62dfa91e319b35be13454bf339b4f141 XMM02=ec2efd57dc4c00df000000000011b450 XMM03=debf6de346e3480e000000000011b520 XMM04=1a16c7ff80dcd45200000000000ae988 XMM05=19e9129bd510f2350000000000131a08 XMM06=b7f64e95cb8a6c880000000000130be0 XMM07=e042d86d42eb936e0000000000122138 XMM08=debf6de346e3480e000000000011b520 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000