syzkaller login: [ 157.965059] BUG: Bad rss-counter state mm:000000003c758038 type:MM_FILEPAGES val:33 [ 157.966545] BUG: Bad rss-counter state mm:000000003c758038 type:MM_ANONPAGES val:22 [ 158.008348] ================================================================== [ 158.009267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 158.010206] Read of size 8 at addr ffff88800f724140 by task sshd/220 [ 158.010993] [ 158.011364] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 158.012462] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 158.013455] Call Trace: [ 158.013795] [ 158.014087] dump_stack_lvl+0x91/0xf0 [ 158.014584] print_report+0xcc/0x620 [ 158.015068] ? __virt_addr_valid+0x102/0x340 [ 158.015621] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.016248] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.016879] kasan_report+0xbe/0xf0 [ 158.017360] ? vma_interval_tree_remove+0xc75/0xec0 [ 158.017997] vma_interval_tree_remove+0xc75/0xec0 [ 158.018601] vma_prepare+0xc54/0x11a0 [ 158.019086] __split_vma+0x5af/0x950 [ 158.019563] ? __pfx___split_vma+0x10/0x10 [ 158.020108] ? find_held_lock+0x2c/0x110 [ 158.020655] do_vmi_align_munmap+0x2ba/0x11f0 [ 158.021233] ? lock_is_held_type+0x9f/0x120 [ 158.021774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 158.022386] ? mtree_range_walk+0x632/0x900 [ 158.022944] ? mas_walk+0x5c7/0x7c0 [ 158.023435] do_vmi_munmap+0x1f1/0x2b0 [ 158.023945] mmap_region+0x1f9/0x2660 [ 158.024453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 158.024975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 158.025708] ? __pfx_lock_acquire+0x10/0x10 [ 158.026245] ? __pfx_mmap_region+0x10/0x10 [ 158.026781] ? security_mmap_addr+0x7d/0xa0 [ 158.027320] ? get_unmapped_area+0x1f5/0x3f0 [ 158.027871] do_mmap+0x854/0xf00 [ 158.028328] vm_mmap_pgoff+0x1a6/0x3a0 [ 158.028831] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 158.029392] ksys_mmap_pgoff+0x3af/0x500 [ 158.029907] do_syscall_64+0x3f/0x90 [ 158.030390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.031052] RIP: 0033:0x7fab33707d82 [ 158.031511] 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 [ 158.033654] RSP: 002b:00007ffdcc54bc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 158.034560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab33707d82 [ 158.035417] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab32b41000 [ 158.036282] RBP: 00007fab32b41000 R08: 0000000000000009 R09: 0000000000001000 [ 158.037163] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562174261ec0 [ 158.038021] R13: 00007ffdcc54bc20 R14: 00007ffdcc54bc50 R15: 00007ffdcc54bfb0 [ 158.038887] [ 158.039184] [ 158.039401] Allocated by task 213: [ 158.039840] kasan_save_stack+0x22/0x50 [ 158.040354] kasan_set_track+0x25/0x30 [ 158.040846] __kasan_slab_alloc+0x59/0x70 [ 158.041375] kmem_cache_alloc+0x16b/0x370 [ 158.041900] vm_area_dup+0x20/0x160 [ 158.042353] __split_vma+0x170/0x950 [ 158.042828] split_vma+0xc6/0x110 [ 158.043274] mprotect_fixup+0x8d2/0xb30 [ 158.043780] do_mprotect_pkey+0x87e/0xd40 [ 158.044311] __x64_sys_mprotect+0x78/0xc0 [ 158.044835] do_syscall_64+0x3f/0x90 [ 158.045316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.045961] [ 158.046177] Freed by task 213: [ 158.046572] kasan_save_stack+0x22/0x50 [ 158.047084] kasan_set_track+0x25/0x30 [ 158.047575] kasan_save_free_info+0x2b/0x50 [ 158.048103] __kasan_slab_free+0x10a/0x190 [ 158.048650] kmem_cache_free+0x10d/0x4d0 [ 158.049156] rcu_core+0x8c8/0x2860 [ 158.049616] __do_softirq+0x1b7/0x7d4 [ 158.050097] [ 158.050311] Last potentially related work creation: [ 158.050898] kasan_save_stack+0x22/0x50 [ 158.051404] __kasan_record_aux_stack+0x8e/0xa0 [ 158.051979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 158.052642] remove_vma+0x139/0x170 [ 158.053101] do_vmi_align_munmap+0xd4a/0x11f0 [ 158.053665] do_vmi_munmap+0x1f1/0x2b0 [ 158.054151] __vm_munmap+0x138/0x3a0 [ 158.054618] __x64_sys_munmap+0x59/0x80 [ 158.055120] do_syscall_64+0x3f/0x90 [ 158.055596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 158.056242] [ 158.056483] The buggy address belongs to the object at ffff88800f7240e8 [ 158.056483] which belongs to the cache vm_area_struct of size 168 [ 158.057955] The buggy address is located 88 bytes inside of [ 158.057955] freed 168-byte region [ffff88800f7240e8, ffff88800f724190) [ 158.059363] [ 158.059582] The buggy address belongs to the physical page: [ 158.060250] page:00000000e6a46dcb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf724 [ 158.061348] memcg:ffff888009c74101 [ 158.061781] flags: 0x100000000000200(slab|node=0|zone=1) [ 158.062425] page_type: 0xffffffff() [ 158.062879] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 158.063798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009c74101 [ 158.064721] page dumped because: kasan: bad access detected [ 158.065386] [ 158.065607] Memory state around the buggy address: [ 158.066200] ffff88800f724000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 158.067062] ffff88800f724080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 158.067927] >ffff88800f724100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 158.068824] ^ [ 158.069463] ffff88800f724180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 158.070325] ffff88800f724200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 158.071181] ================================================================== [ 158.072163] Disabling lock debugging due to kernel taint [ 159.833946] BUG: Bad rss-counter state mm:00000000a179596d type:MM_FILEPAGES val:33 [ 159.835110] BUG: Bad rss-counter state mm:00000000a179596d type:MM_ANONPAGES val:22 [ 160.308972] BUG: Bad rss-counter state mm:00000000d4850d5b type:MM_FILEPAGES val:33 [ 160.310582] BUG: Bad rss-counter state mm:00000000d4850d5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24827' (ECDSA) to the list of known hosts. 2023/06/20 00:03:56 fuzzer started 2023/06/20 00:03:56 dialing manager at localhost:44161 2023/06/20 00:03:56 checking machine... 2023/06/20 00:03:56 checking revisions... [ 161.147873] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:03:56 testing simple program... [ 161.191764] cgroup: Unknown subsys name 'net' [ 161.244007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffea000071f240 RCX=ffffffff816a9bb5 RDX=1ffffd40000e3e48 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888008f3f198 R8 =0000000000000000 R9 =fffff940000e3e48 R10=ffffea000071f247 R11=0000000000009293 R12=0000000000000ea9 R13=0000000000000ea9 R14=dffffc0000000000 R15=ffffea000071f260 RIP=ffffffff814c0328 RFL=00000246 [---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 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=00007f3f19bcc000 CR3=00000000164d6000 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=000000000005be40000b021200007969 XMM02=00000000000002e40000000000058990 XMM03=000b0012000079800000000000000021 XMM04=00000000000b8b10000b0212000079cd XMM05=000b0012000079b90000000000000008 XMM06=00000000000003690000000000052600 XMM07=000000000004f7f0000b021200007994 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81846013 RDX=0000000000008460 RSI=0000000000008460 RDI=ffffffff86508d40 RBP=ffff888019d2fa38 RSP=ffff888019d2f970 R8 =0000000000000000 R9 =ffff888019d2fa20 R10=0000000000038001 R11=0000000000010b7e R12=ffff888019d2fa40 R13=ffff888019d2fa28 R14=ffff888019d2fa21 R15=ffff888019d2f9e0 RIP=ffffffff8113078b RFL=00000246 [---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 00007f3f19c37900 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=00007fffd3b67000 CR3=00000000164d6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000