syzkaller login: [ 60.865477] BUG: Bad rss-counter state mm:0000000085c2a8f6 type:MM_FILEPAGES val:33 [ 60.867142] BUG: Bad rss-counter state mm:0000000085c2a8f6 type:MM_ANONPAGES val:22 [ 61.009806] ================================================================== [ 61.010698] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.011626] Read of size 8 at addr ffff88800ead3a50 by task sshd/220 [ 61.012481] [ 61.012702] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.013572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.014548] Call Trace: [ 61.014871] [ 61.015155] dump_stack_lvl+0x91/0xf0 [ 61.015643] print_report+0xcc/0x620 [ 61.016127] ? __virt_addr_valid+0x102/0x340 [ 61.016666] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.017302] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.017917] kasan_report+0xbe/0xf0 [ 61.018386] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.019009] vma_interval_tree_remove+0xc75/0xec0 [ 61.019603] vma_prepare+0xc54/0x11a0 [ 61.020083] __split_vma+0x5af/0x950 [ 61.020551] ? __pfx___split_vma+0x10/0x10 [ 61.021083] ? find_held_lock+0x2c/0x110 [ 61.021607] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.022169] ? lock_is_held_type+0x9f/0x120 [ 61.022711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.023311] ? mtree_range_walk+0x632/0x900 [ 61.023858] ? mas_walk+0x5c7/0x7c0 [ 61.024331] do_vmi_munmap+0x1f1/0x2b0 [ 61.024839] mmap_region+0x1f9/0x2660 [ 61.025324] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.025832] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.026544] ? __pfx_lock_acquire+0x10/0x10 [ 61.027073] ? __pfx_mmap_region+0x10/0x10 [ 61.027601] ? security_mmap_addr+0x7d/0xa0 [ 61.028131] ? get_unmapped_area+0x1f5/0x3f0 [ 61.028679] do_mmap+0x854/0xf00 [ 61.029127] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.029620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.030185] ksys_mmap_pgoff+0x3af/0x500 [ 61.030693] do_syscall_64+0x3f/0x90 [ 61.031167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.031808] RIP: 0033:0x7f325251fd82 [ 61.032263] 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 [ 61.034400] RSP: 002b:00007ffffbcd15c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.035344] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f325251fd82 [ 61.036229] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3251959000 [ 61.037132] RBP: 00007f3251959000 R08: 0000000000000009 R09: 0000000000001000 [ 61.038023] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555eccddeb20 [ 61.038865] R13: 00007ffffbcd15e0 R14: 00007ffffbcd1610 R15: 00007ffffbcd1970 [ 61.039757] [ 61.040059] [ 61.040280] Allocated by task 213: [ 61.040703] kasan_save_stack+0x22/0x50 [ 61.041235] kasan_set_track+0x25/0x30 [ 61.041722] __kasan_slab_alloc+0x59/0x70 [ 61.042238] kmem_cache_alloc+0x16b/0x370 [ 61.042746] vm_area_dup+0x20/0x160 [ 61.043202] __split_vma+0x170/0x950 [ 61.043668] split_vma+0xc6/0x110 [ 61.044114] mprotect_fixup+0x8d2/0xb30 [ 61.044640] do_mprotect_pkey+0x87e/0xd40 [ 61.045209] __x64_sys_mprotect+0x78/0xc0 [ 61.045750] do_syscall_64+0x3f/0x90 [ 61.046248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.046912] [ 61.047132] Freed by task 213: [ 61.047533] kasan_save_stack+0x22/0x50 [ 61.048058] kasan_set_track+0x25/0x30 [ 61.048578] kasan_save_free_info+0x2b/0x50 [ 61.049141] __kasan_slab_free+0x10a/0x190 [ 61.049700] kmem_cache_free+0x10d/0x4d0 [ 61.050228] rcu_core+0x8c8/0x2860 [ 61.050690] __do_softirq+0x1b7/0x7d4 [ 61.051180] [ 61.051401] Last potentially related work creation: [ 61.052012] kasan_save_stack+0x22/0x50 [ 61.052540] __kasan_record_aux_stack+0x8e/0xa0 [ 61.053149] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.053823] remove_vma+0x139/0x170 [ 61.054294] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.054868] do_vmi_munmap+0x1f1/0x2b0 [ 61.055374] __vm_munmap+0x138/0x3a0 [ 61.055855] __x64_sys_munmap+0x59/0x80 [ 61.056374] do_syscall_64+0x3f/0x90 [ 61.056882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.057546] [ 61.057769] Second to last potentially related work creation: [ 61.058484] kasan_save_stack+0x22/0x50 [ 61.059004] __kasan_record_aux_stack+0x8e/0xa0 [ 61.059604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.060277] remove_vma+0x139/0x170 [ 61.060754] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.061343] do_vmi_munmap+0x1f1/0x2b0 [ 61.061862] mmap_region+0x1f9/0x2660 [ 61.062356] do_mmap+0x854/0xf00 [ 61.062806] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.063320] ksys_mmap_pgoff+0x3af/0x500 [ 61.063842] do_syscall_64+0x3f/0x90 [ 61.064332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.065018] [ 61.065239] The buggy address belongs to the object at ffff88800ead39f8 [ 61.065239] which belongs to the cache vm_area_struct of size 168 [ 61.066780] The buggy address is located 88 bytes inside of [ 61.066780] freed 168-byte region [ffff88800ead39f8, ffff88800ead3aa0) [ 61.068235] [ 61.068456] The buggy address belongs to the physical page: [ 61.069165] page:000000003f6a36f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xead3 [ 61.070298] memcg:ffff88800e659d01 [ 61.070739] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.071477] page_type: 0xffffffff() [ 61.071947] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 61.072919] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e659d01 [ 61.073872] page dumped because: kasan: bad access detected [ 61.074563] [ 61.074782] Memory state around the buggy address: [ 61.075388] ffff88800ead3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.076289] ffff88800ead3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 61.077192] >ffff88800ead3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.078082] ^ [ 61.078813] ffff88800ead3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.079716] ffff88800ead3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.080620] ================================================================== [ 61.081642] Disabling lock debugging due to kernel taint [ 63.899726] BUG: Bad rss-counter state mm:000000009acb0e06 type:MM_FILEPAGES val:33 [ 63.900738] BUG: Bad rss-counter state mm:000000009acb0e06 type:MM_ANONPAGES val:22 [ 64.452787] BUG: Bad rss-counter state mm:00000000ebaf4aba type:MM_FILEPAGES val:33 [ 64.453950] BUG: Bad rss-counter state mm:00000000ebaf4aba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65141' (ECDSA) to the list of known hosts. 2023/06/20 06:14:22 fuzzer started 2023/06/20 06:14:22 dialing manager at localhost:44161 2023/06/20 06:14:22 checking machine... 2023/06/20 06:14:22 checking revisions... [ 65.126482] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:14:22 testing simple program... [ 65.195794] cgroup: Unknown subsys name 'net' [ 65.251304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:13:52 Registers: info registers vcpu 0 RAX=1ffff1100195c743 RBX=ffff88800cae39e8 RCX=1ffff11001e9a6ac RDX=dffffc0000000000 RSI=ffff88800f75a200 RDI=ffff88800cae3a18 RBP=ffff88800f4d3530 RSP=ffff88801433f5e8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800f75a000 R13=0000000000000000 R14=ffff8880166f83d8 R15=ffff8880166f8390 RIP=ffffffff818474fe 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 00007f35119ec900 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=00007f8925bd5650 CR3=000000000d122000 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=ff5b98b23919f66700000000000ae988 XMM05=04090ae21bb611400000000000136998 XMM06=19e9129bd510f2350000000000135830 XMM07=fb795ef6d657705600000000001249d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdebabb2e8 CR3=000000000eb66000 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=2032323a34313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000