syzkaller login: [ 30.843152] BUG: Bad rss-counter state mm:000000005f15ab28 type:MM_FILEPAGES val:33 [ 30.844080] BUG: Bad rss-counter state mm:000000005f15ab28 type:MM_ANONPAGES val:22 [ 30.997106] ================================================================== [ 30.998031] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.998982] Read of size 8 at addr ffff88800d2ed968 by task sshd/220 [ 30.999745] [ 30.999996] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.001016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.002045] Call Trace: [ 31.002365] [ 31.002655] dump_stack_lvl+0x91/0xf0 [ 31.003161] print_report+0xcc/0x620 [ 31.003643] ? __virt_addr_valid+0x102/0x340 [ 31.004243] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.004864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.005496] kasan_report+0xbe/0xf0 [ 31.005998] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006622] vma_interval_tree_remove+0xc75/0xec0 [ 31.007236] vma_prepare+0xc54/0x11a0 [ 31.007721] __split_vma+0x5af/0x950 [ 31.008227] ? __pfx___split_vma+0x10/0x10 [ 31.008754] ? find_held_lock+0x2c/0x110 [ 31.009269] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.009850] ? lock_is_held_type+0x9f/0x120 [ 31.010386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.010998] ? mtree_range_walk+0x632/0x900 [ 31.011554] ? mas_walk+0x5c7/0x7c0 [ 31.012030] do_vmi_munmap+0x1f1/0x2b0 [ 31.012523] mmap_region+0x1f9/0x2660 [ 31.013011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.013521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.014263] ? __pfx_lock_acquire+0x10/0x10 [ 31.014804] ? __pfx_mmap_region+0x10/0x10 [ 31.015336] ? security_mmap_addr+0x7d/0xa0 [ 31.015879] ? get_unmapped_area+0x1f5/0x3f0 [ 31.016431] do_mmap+0x854/0xf00 [ 31.016874] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.017372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.017948] ksys_mmap_pgoff+0x3af/0x500 [ 31.018460] do_syscall_64+0x3f/0x90 [ 31.018948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.019607] RIP: 0033:0x7f6c25d12d82 [ 31.020066] 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 [ 31.022210] RSP: 002b:00007ffdfceffc18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.023143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c25d12d82 [ 31.024012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c2514c000 [ 31.024884] RBP: 00007f6c2514c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.025729] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559262c98ec0 [ 31.026602] R13: 00007ffdfceffc30 R14: 00007ffdfceffc60 R15: 00007ffdfcefffc0 [ 31.027476] [ 31.027776] [ 31.027993] Allocated by task 213: [ 31.028416] kasan_save_stack+0x22/0x50 [ 31.028932] kasan_set_track+0x25/0x30 [ 31.029433] __kasan_slab_alloc+0x59/0x70 [ 31.029980] kmem_cache_alloc+0x16b/0x370 [ 31.030492] vm_area_dup+0x20/0x160 [ 31.030951] __split_vma+0x170/0x950 [ 31.031424] split_vma+0xc6/0x110 [ 31.031876] mprotect_fixup+0x8d2/0xb30 [ 31.032376] do_mprotect_pkey+0x87e/0xd40 [ 31.032898] __x64_sys_mprotect+0x78/0xc0 [ 31.033417] do_syscall_64+0x3f/0x90 [ 31.033927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.034574] [ 31.034791] Freed by task 213: [ 31.035183] kasan_save_stack+0x22/0x50 [ 31.035693] kasan_set_track+0x25/0x30 [ 31.036197] kasan_save_free_info+0x2b/0x50 [ 31.036732] __kasan_slab_free+0x10a/0x190 [ 31.037265] kmem_cache_free+0x10d/0x4d0 [ 31.037780] rcu_core+0x8c8/0x2860 [ 31.038231] __do_softirq+0x1b7/0x7d4 [ 31.038715] [ 31.038931] Last potentially related work creation: [ 31.039514] kasan_save_stack+0x22/0x50 [ 31.040019] __kasan_record_aux_stack+0x8e/0xa0 [ 31.040602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.041249] remove_vma+0x139/0x170 [ 31.041699] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.042337] do_vmi_munmap+0x1f1/0x2b0 [ 31.042835] __vm_munmap+0x138/0x3a0 [ 31.043299] __x64_sys_munmap+0x59/0x80 [ 31.043794] do_syscall_64+0x3f/0x90 [ 31.044278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.044930] [ 31.045148] Second to last potentially related work creation: [ 31.045852] kasan_save_stack+0x22/0x50 [ 31.046355] __kasan_record_aux_stack+0x8e/0xa0 [ 31.046931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.047579] remove_vma+0x139/0x170 [ 31.048032] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.048603] do_vmi_munmap+0x1f1/0x2b0 [ 31.049089] __vm_munmap+0x138/0x3a0 [ 31.049551] elf_map+0x26f/0x310 [ 31.050010] load_elf_binary+0x3417/0x5030 [ 31.050551] bprm_execve+0x803/0x1940 [ 31.051032] do_execveat_common+0x734/0x8e0 [ 31.051562] __x64_sys_execve+0x93/0xc0 [ 31.052057] do_syscall_64+0x3f/0x90 [ 31.052540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.053180] [ 31.053399] The buggy address belongs to the object at ffff88800d2ed910 [ 31.053399] which belongs to the cache vm_area_struct of size 168 [ 31.054892] The buggy address is located 88 bytes inside of [ 31.054892] freed 168-byte region [ffff88800d2ed910, ffff88800d2ed9b8) [ 31.056297] [ 31.056514] The buggy address belongs to the physical page: [ 31.057171] page:0000000008cde851 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd2ed [ 31.058258] memcg:ffff88800e654801 [ 31.058691] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.059337] page_type: 0xffffffff() [ 31.059790] raw: 0100000000000200 ffff8880087a0c80 ffffea0000353980 dead000000000002 [ 31.060705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e654801 [ 31.061614] page dumped because: kasan: bad access detected [ 31.062294] [ 31.062513] Memory state around the buggy address: [ 31.063089] ffff88800d2ed800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.063975] ffff88800d2ed880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.064851] >ffff88800d2ed900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.065700] ^ [ 31.066505] ffff88800d2ed980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.067369] ffff88800d2eda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.068235] ================================================================== [ 31.069220] Disabling lock debugging due to kernel taint [ 33.817646] BUG: Bad rss-counter state mm:00000000eb386895 type:MM_FILEPAGES val:33 [ 33.818674] BUG: Bad rss-counter state mm:00000000eb386895 type:MM_ANONPAGES val:22 [ 34.323630] BUG: Bad rss-counter state mm:00000000c0371fed type:MM_FILEPAGES val:33 [ 34.324814] BUG: Bad rss-counter state mm:00000000c0371fed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14770' (ECDSA) to the list of known hosts. 2023/06/20 14:59:20 fuzzer started 2023/06/20 14:59:20 dialing manager at localhost:36067 2023/06/20 14:59:20 checking machine... 2023/06/20 14:59:20 checking revisions... [ 35.023136] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:59:20 testing simple program... [ 35.070799] cgroup: Unknown subsys name 'net' [ 35.120457] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:59:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff8880147ef470 RSP=ffff8880147ef338 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880147ef478 R13=ffff8880147ef460 R14=ffff8880147ef459 R15=ffff8880147ef418 RIP=ffffffff8112fc18 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 00007f02e33ec900 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=00007f02e290b020 CR3=00000000139f2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a73b1f8b6643f99500000000000ae988 XMM05=65549385f264cc540000000000133d30 XMM06=4fda316b135da52b0000000000132b20 XMM07=fb795ef6d65770560000000000121738 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=00007f52e37b1163 RCX=0000000080000101 RDX=1ffff1100d9e135e RSI=ffffffff81007b50 RDI=00007f52e37b1163 RBP=00007f52e37b1163 RSP=ffff88806cf09a18 R8 =ffffffff864bbb58 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800e2d8000 R15=ffff888008eaeb30 RIP=ffffffff814c0871 RFL=00000207 [-----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 00007f52e32be900 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=00007f52e3875618 CR3=000000000ea6c000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000