syzkaller login: [ 28.748238] BUG: Bad rss-counter state mm:00000000e907a311 type:MM_FILEPAGES val:33 [ 28.750300] BUG: Bad rss-counter state mm:00000000e907a311 type:MM_ANONPAGES val:22 [ 28.941926] ================================================================== [ 28.942835] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.943865] Read of size 8 at addr ffff88800e440b38 by task sshd/219 [ 28.944636] [ 28.944851] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.945736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.946701] Call Trace: [ 28.947021] [ 28.947304] dump_stack_lvl+0x91/0xf0 [ 28.947797] print_report+0xcc/0x620 [ 28.948280] ? __virt_addr_valid+0x102/0x340 [ 28.948832] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.949464] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.950084] kasan_report+0xbe/0xf0 [ 28.950561] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.951179] vma_interval_tree_remove+0xc75/0xec0 [ 28.951784] vma_prepare+0xc54/0x11a0 [ 28.952263] __split_vma+0x5af/0x950 [ 28.952751] ? __pfx___split_vma+0x10/0x10 [ 28.953306] ? find_held_lock+0x2c/0x110 [ 28.953833] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.954397] ? lock_is_held_type+0x9f/0x120 [ 28.954935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.955550] ? mtree_range_walk+0x632/0x900 [ 28.956112] ? mas_walk+0x5c7/0x7c0 [ 28.956586] do_vmi_munmap+0x1f1/0x2b0 [ 28.957093] mmap_region+0x1f9/0x2660 [ 28.957584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.958111] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.958819] ? __pfx_lock_acquire+0x10/0x10 [ 28.959352] ? __pfx_mmap_region+0x10/0x10 [ 28.959879] ? security_mmap_addr+0x7d/0xa0 [ 28.960415] ? get_unmapped_area+0x1f5/0x3f0 [ 28.960969] do_mmap+0x854/0xf00 [ 28.961445] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.961943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.962513] ksys_mmap_pgoff+0x3af/0x500 [ 28.963021] do_syscall_64+0x3f/0x90 [ 28.963507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.964159] RIP: 0033:0x7f21a7a23d82 [ 28.964623] 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 [ 28.966785] RSP: 002b:00007ffc8ddbf388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.967695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21a7a23d82 [ 28.968550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21a6e5d000 [ 28.969412] RBP: 00007f21a6e5d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.970268] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c1a476ec0 [ 28.971121] R13: 00007ffc8ddbf3a0 R14: 00007ffc8ddbf3d0 R15: 00007ffc8ddbf730 [ 28.971983] [ 28.972278] [ 28.972492] Allocated by task 212: [ 28.972921] kasan_save_stack+0x22/0x50 [ 28.973444] kasan_set_track+0x25/0x30 [ 28.973937] __kasan_slab_alloc+0x59/0x70 [ 28.974461] kmem_cache_alloc+0x16b/0x370 [ 28.974980] vm_area_dup+0x20/0x160 [ 28.975437] __split_vma+0x170/0x950 [ 28.975905] split_vma+0xc6/0x110 [ 28.976346] mprotect_fixup+0x8d2/0xb30 [ 28.976847] do_mprotect_pkey+0x87e/0xd40 [ 28.977386] __x64_sys_mprotect+0x78/0xc0 [ 28.977916] do_syscall_64+0x3f/0x90 [ 28.978397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.979043] [ 28.979262] Freed by task 212: [ 28.979656] kasan_save_stack+0x22/0x50 [ 28.980168] kasan_set_track+0x25/0x30 [ 28.980672] kasan_save_free_info+0x2b/0x50 [ 28.981235] __kasan_slab_free+0x10a/0x190 [ 28.981771] kmem_cache_free+0x10d/0x4d0 [ 28.982281] rcu_core+0x8c8/0x2860 [ 28.982731] __do_softirq+0x1b7/0x7d4 [ 28.983211] [ 28.983429] Last potentially related work creation: [ 28.984009] kasan_save_stack+0x22/0x50 [ 28.984513] __kasan_record_aux_stack+0x8e/0xa0 [ 28.985102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.985750] remove_vma+0x139/0x170 [ 28.986209] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.986774] do_vmi_munmap+0x1f1/0x2b0 [ 28.987266] __vm_munmap+0x138/0x3a0 [ 28.987739] __x64_sys_munmap+0x59/0x80 [ 28.988241] do_syscall_64+0x3f/0x90 [ 28.988726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.989389] [ 28.989608] Second to last potentially related work creation: [ 28.990301] kasan_save_stack+0x22/0x50 [ 28.990810] __kasan_record_aux_stack+0x8e/0xa0 [ 28.991384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.992030] remove_vma+0x139/0x170 [ 28.992479] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.993059] do_vmi_munmap+0x1f1/0x2b0 [ 28.993551] __vm_munmap+0x138/0x3a0 [ 28.994019] __x64_sys_munmap+0x59/0x80 [ 28.994527] do_syscall_64+0x3f/0x90 [ 28.995009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.995656] [ 28.995870] The buggy address belongs to the object at ffff88800e440ae0 [ 28.995870] which belongs to the cache vm_area_struct of size 168 [ 28.997358] The buggy address is located 88 bytes inside of [ 28.997358] freed 168-byte region [ffff88800e440ae0, ffff88800e440b88) [ 28.998792] [ 28.999013] The buggy address belongs to the physical page: [ 28.999675] page:0000000038b474ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe440 [ 29.000768] memcg:ffff88800ff46801 [ 29.001220] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.001879] page_type: 0xffffffff() [ 29.002343] raw: 0100000000000200 ffff8880087a0c80 ffffea0000366fc0 dead000000000006 [ 29.003271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff46801 [ 29.004184] page dumped because: kasan: bad access detected [ 29.004847] [ 29.005072] Memory state around the buggy address: [ 29.005660] ffff88800e440a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.006518] ffff88800e440a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.007375] >ffff88800e440b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.008236] ^ [ 29.008856] ffff88800e440b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.009727] ffff88800e440c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.010584] ================================================================== [ 29.011589] Disabling lock debugging due to kernel taint [ 31.004119] BUG: Bad rss-counter state mm:00000000b07cc94e type:MM_FILEPAGES val:33 [ 31.005459] BUG: Bad rss-counter state mm:00000000b07cc94e type:MM_ANONPAGES val:22 [ 31.450368] BUG: Bad rss-counter state mm:000000005b106df1 type:MM_FILEPAGES val:33 [ 31.451480] BUG: Bad rss-counter state mm:000000005b106df1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9458' (ECDSA) to the list of known hosts. 2023/06/20 17:06:27 fuzzer started 2023/06/20 17:06:27 dialing manager at localhost:36067 2023/06/20 17:06:27 checking machine... 2023/06/20 17:06:27 checking revisions... [ 32.161450] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:06:28 testing simple program... [ 32.216442] cgroup: Unknown subsys name 'net' [ 32.255536] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:06:27 Registers: info registers vcpu 0 RAX=ffffffff83636c06 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801a1d7c01 RSI=ffff88801a1d7cd8 RDI=ffff88801a1d7cd8 RBP=ffff88801a1d78a8 RSP=ffff88801a1d77e0 R8 =ffffffff863de428 R9 =ffff88801a1d7890 R10=0000000000038001 R11=0000000000091bda R12=ffff88801a1d78b0 R13=ffff88801a1d7898 R14=ffff88801a1d7ce0 R15=ffff88801a1d7850 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007fe5633d0900 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=00007ffddb590000 CR3=000000000f30c000 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=0000000000000001 RBX=1ffff1100d9e13bf RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09de8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8562be48 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000047 [---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 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=00007eff407fd650 CR3=000000000f5d8000 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=2037323a36303a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a36303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000