syzkaller login: [ 30.986446] BUG: Bad rss-counter state mm:00000000cef358d2 type:MM_FILEPAGES val:33 [ 30.987151] BUG: Bad rss-counter state mm:00000000cef358d2 type:MM_ANONPAGES val:22 [ 31.030104] ================================================================== [ 31.030742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.031321] Read of size 8 at addr ffff88800df45140 by task sshd/220 [ 31.031843] [ 31.031984] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.032521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.042551] Call Trace: [ 31.042770] [ 31.042959] dump_stack_lvl+0x91/0xf0 [ 31.043295] print_report+0xcc/0x620 [ 31.043622] ? __virt_addr_valid+0x102/0x340 [ 31.043992] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.044406] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.044811] kasan_report+0xbe/0xf0 [ 31.045120] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.045533] vma_interval_tree_remove+0xc75/0xec0 [ 31.045938] vma_prepare+0xc54/0x11a0 [ 31.046250] __split_vma+0x5af/0x950 [ 31.046579] ? __pfx___split_vma+0x10/0x10 [ 31.046951] ? find_held_lock+0x2c/0x110 [ 31.047296] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.047654] ? lock_is_held_type+0x9f/0x120 [ 31.047999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.048384] ? mtree_range_walk+0x632/0x900 [ 31.048746] ? mas_walk+0x5c7/0x7c0 [ 31.049058] do_vmi_munmap+0x1f1/0x2b0 [ 31.049381] mmap_region+0x1f9/0x2660 [ 31.049697] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.050035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.050553] ? __pfx_lock_acquire+0x10/0x10 [ 31.050902] ? __pfx_mmap_region+0x10/0x10 [ 31.051251] ? security_mmap_addr+0x7d/0xa0 [ 31.051596] ? get_unmapped_area+0x1f5/0x3f0 [ 31.051954] do_mmap+0x854/0xf00 [ 31.052248] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.052576] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.052944] ksys_mmap_pgoff+0x3af/0x500 [ 31.053277] do_syscall_64+0x3f/0x90 [ 31.053592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.054018] RIP: 0033:0x7ff0b2374d82 [ 31.054326] 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 [ 31.055806] RSP: 002b:00007ffcb06b9c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.056390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0b2374d82 [ 31.056938] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0b17ae000 [ 31.057527] RBP: 00007ff0b17ae000 R08: 0000000000000009 R09: 0000000000001000 [ 31.058165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f03981f70 [ 31.058757] R13: 00007ffcb06b9c80 R14: 00007ffcb06b9cb0 R15: 00007ffcb06ba010 [ 31.059317] [ 31.059511] [ 31.059652] Allocated by task 213: [ 31.059930] kasan_save_stack+0x22/0x50 [ 31.060288] kasan_set_track+0x25/0x30 [ 31.060638] __kasan_slab_alloc+0x59/0x70 [ 31.061032] kmem_cache_alloc+0x16b/0x370 [ 31.061434] vm_area_dup+0x20/0x160 [ 31.061771] __split_vma+0x170/0x950 [ 31.062610] split_vma+0xc6/0x110 [ 31.063380] mprotect_fixup+0x8d2/0xb30 [ 31.064265] do_mprotect_pkey+0x87e/0xd40 [ 31.065263] __x64_sys_mprotect+0x78/0xc0 [ 31.066261] do_syscall_64+0x3f/0x90 [ 31.067144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.068320] [ 31.068681] Freed by task 213: [ 31.069473] kasan_save_stack+0x22/0x50 [ 31.070386] kasan_set_track+0x25/0x30 [ 31.071340] kasan_save_free_info+0x2b/0x50 [ 31.072358] __kasan_slab_free+0x10a/0x190 [ 31.073317] kmem_cache_free+0x10d/0x4d0 [ 31.074239] rcu_core+0x8c8/0x2860 [ 31.075454] __do_softirq+0x1b7/0x7d4 [ 31.076307] [ 31.076662] Last potentially related work creation: [ 31.077730] kasan_save_stack+0x22/0x50 [ 31.078459] __kasan_record_aux_stack+0x8e/0xa0 [ 31.078833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.079251] remove_vma+0x139/0x170 [ 31.079548] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.079909] do_vmi_munmap+0x1f1/0x2b0 [ 31.080226] __vm_munmap+0x138/0x3a0 [ 31.080528] __x64_sys_munmap+0x59/0x80 [ 31.080849] do_syscall_64+0x3f/0x90 [ 31.081158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.081584] [ 31.081727] Second to last potentially related work creation: [ 31.082170] kasan_save_stack+0x22/0x50 [ 31.082551] __kasan_record_aux_stack+0x8e/0xa0 [ 31.082929] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.083357] remove_vma+0x139/0x170 [ 31.083652] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.084013] do_vmi_munmap+0x1f1/0x2b0 [ 31.084335] mmap_region+0x1f9/0x2660 [ 31.084651] do_mmap+0x854/0xf00 [ 31.084934] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.085262] ksys_mmap_pgoff+0x7d/0x500 [ 31.085586] do_syscall_64+0x3f/0x90 [ 31.085895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086371] [ 31.086521] The buggy address belongs to the object at ffff88800df450e8 [ 31.086521] which belongs to the cache vm_area_struct of size 168 [ 31.087488] The buggy address is located 88 bytes inside of [ 31.087488] freed 168-byte region [ffff88800df450e8, ffff88800df45190) [ 31.088430] [ 31.088575] The buggy address belongs to the physical page: [ 31.088998] page:00000000ec68b1d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf45 [ 31.089693] memcg:ffff88800975c901 [ 31.089971] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.090432] page_type: 0xffffffff() [ 31.090722] raw: 0100000000000200 ffff8880087a0c80 ffffea0000259fc0 dead000000000008 [ 31.091345] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800975c901 [ 31.091934] page dumped because: kasan: bad access detected [ 31.092356] [ 31.092500] Memory state around the buggy address: [ 31.092874] ffff88800df45000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.093424] ffff88800df45080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.093971] >ffff88800df45100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.094556] ^ [ 31.094957] ffff88800df45180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.095500] ffff88800df45200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.096041] ================================================================== [ 31.096889] Disabling lock debugging due to kernel taint [ 35.208006] BUG: Bad rss-counter state mm:000000001b1de7ab type:MM_FILEPAGES val:33 [ 35.208723] BUG: Bad rss-counter state mm:000000001b1de7ab type:MM_ANONPAGES val:22 [ 35.803043] BUG: Bad rss-counter state mm:000000001d3df98f type:MM_FILEPAGES val:33 [ 35.804549] BUG: Bad rss-counter state mm:000000001d3df98f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24838' (ECDSA) to the list of known hosts. 2023/06/21 10:09:26 fuzzer started 2023/06/21 10:09:27 dialing manager at localhost:36067 2023/06/21 10:09:27 checking machine... 2023/06/21 10:09:27 checking revisions... [ 36.706733] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:09:27 testing simple program... [ 36.763279] cgroup: Unknown subsys name 'net' [ 36.881462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:09:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f7ff3162a90 CR3=000000000d66e000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=a1033121ede38fd10000000000134128 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=d037d1a5281d791600000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffea00006d7a88 RCX=0000000000000000 RDX=1ffffd40000daf52 RSI=ffffffff816625da RDI=ffffea00006d7a90 RBP=ffffea00006d87c0 RSP=ffff8880147ff740 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800fe59000 R13=ffff88800fe59000 R14=ffffea00006d87c8 R15=0000000000000001 RIP=ffffffff81662624 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 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=00007f9758e17028 CR3=0000000016bb6000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e616d7a6c62696c2f756e672d78 XMM02=00352e6f732e616d7a6c62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000