syzkaller login: [ 31.812067] BUG: Bad rss-counter state mm:000000002f031b64 type:MM_FILEPAGES val:33 [ 31.813471] BUG: Bad rss-counter state mm:000000002f031b64 type:MM_ANONPAGES val:22 [ 31.982152] ================================================================== [ 31.983309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.984304] Read of size 8 at addr ffff888014361a50 by task sshd/220 [ 31.985271] [ 31.985516] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.986402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.987413] Call Trace: [ 31.987750] [ 31.988039] dump_stack_lvl+0x91/0xf0 [ 31.988545] print_report+0xcc/0x620 [ 31.989034] ? __virt_addr_valid+0x102/0x340 [ 31.989609] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.990227] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.990863] kasan_report+0xbe/0xf0 [ 31.991346] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.991986] vma_interval_tree_remove+0xc75/0xec0 [ 31.992598] vma_prepare+0xc54/0x11a0 [ 31.993079] __split_vma+0x5af/0x950 [ 31.993569] ? __pfx___split_vma+0x10/0x10 [ 31.994099] ? find_held_lock+0x2c/0x110 [ 31.994647] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.995232] ? lock_is_held_type+0x9f/0x120 [ 31.995788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.996407] ? mtree_range_walk+0x632/0x900 [ 31.996966] ? mas_walk+0x5c7/0x7c0 [ 31.997457] do_vmi_munmap+0x1f1/0x2b0 [ 31.997962] mmap_region+0x1f9/0x2660 [ 31.998479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.999007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.999742] ? __pfx_lock_acquire+0x10/0x10 [ 32.000283] ? __pfx_mmap_region+0x10/0x10 [ 32.000829] ? security_mmap_addr+0x7d/0xa0 [ 32.001370] ? get_unmapped_area+0x1f5/0x3f0 [ 32.001929] do_mmap+0x854/0xf00 [ 32.002371] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.002881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.003470] ksys_mmap_pgoff+0x3af/0x500 [ 32.003975] do_syscall_64+0x3f/0x90 [ 32.004479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.005132] RIP: 0033:0x7fb14f229d82 [ 32.005601] 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 [ 32.007798] RSP: 002b:00007ffd18f2ef48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.008735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb14f229d82 [ 32.009597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb14e663000 [ 32.010456] RBP: 00007fb14e663000 R08: 0000000000000009 R09: 0000000000001000 [ 32.011314] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556aaf24df70 [ 32.012171] R13: 00007ffd18f2ef60 R14: 00007ffd18f2ef90 R15: 00007ffd18f2f2f0 [ 32.013041] [ 32.013332] [ 32.013567] Allocated by task 213: [ 32.013997] kasan_save_stack+0x22/0x50 [ 32.014518] kasan_set_track+0x25/0x30 [ 32.015032] __kasan_slab_alloc+0x59/0x70 [ 32.015565] kmem_cache_alloc+0x16b/0x370 [ 32.016084] vm_area_dup+0x20/0x160 [ 32.016563] __split_vma+0x170/0x950 [ 32.017027] split_vma+0xc6/0x110 [ 32.017478] mprotect_fixup+0x8d2/0xb30 [ 32.017980] do_mprotect_pkey+0x87e/0xd40 [ 32.018518] __x64_sys_mprotect+0x78/0xc0 [ 32.019047] do_syscall_64+0x3f/0x90 [ 32.019534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.020178] [ 32.020404] Freed by task 213: [ 32.020809] kasan_save_stack+0x22/0x50 [ 32.021313] kasan_set_track+0x25/0x30 [ 32.021827] kasan_save_free_info+0x2b/0x50 [ 32.022361] __kasan_slab_free+0x10a/0x190 [ 32.022928] kmem_cache_free+0x10d/0x4d0 [ 32.023448] rcu_core+0x8c8/0x2860 [ 32.023888] __do_softirq+0x1b7/0x7d4 [ 32.024362] [ 32.024589] Last potentially related work creation: [ 32.025187] kasan_save_stack+0x22/0x50 [ 32.025799] __kasan_record_aux_stack+0x8e/0xa0 [ 32.026384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.027055] remove_vma+0x139/0x170 [ 32.027522] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.028076] do_vmi_munmap+0x1f1/0x2b0 [ 32.028576] __vm_munmap+0x138/0x3a0 [ 32.029038] __x64_sys_munmap+0x59/0x80 [ 32.029557] do_syscall_64+0x3f/0x90 [ 32.030040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.030705] [ 32.030933] Second to last potentially related work creation: [ 32.031629] kasan_save_stack+0x22/0x50 [ 32.032132] __kasan_record_aux_stack+0x8e/0xa0 [ 32.032715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.033372] remove_vma+0x139/0x170 [ 32.033844] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.034414] do_vmi_munmap+0x1f1/0x2b0 [ 32.034927] mmap_region+0x1f9/0x2660 [ 32.035417] do_mmap+0x854/0xf00 [ 32.035846] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.036331] ksys_mmap_pgoff+0x3af/0x500 [ 32.036842] do_syscall_64+0x3f/0x90 [ 32.037318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.037977] [ 32.038191] The buggy address belongs to the object at ffff8880143619f8 [ 32.038191] which belongs to the cache vm_area_struct of size 168 [ 32.039723] The buggy address is located 88 bytes inside of [ 32.039723] freed 168-byte region [ffff8880143619f8, ffff888014361aa0) [ 32.041345] [ 32.041638] The buggy address belongs to the physical page: [ 32.042531] page:00000000aa8e9d42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14361 [ 32.043967] memcg:ffff88800fe62e01 [ 32.044417] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.045076] page_type: 0xffffffff() [ 32.045577] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f9a80 dead00000000000c [ 32.046512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe62e01 [ 32.047450] page dumped because: kasan: bad access detected [ 32.048111] [ 32.048325] Memory state around the buggy address: [ 32.048937] ffff888014361900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.049816] ffff888014361980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.050676] >ffff888014361a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.051550] ^ [ 32.052254] ffff888014361a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.053135] ffff888014361b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.054006] ================================================================== [ 32.054975] Disabling lock debugging due to kernel taint [ 34.052733] BUG: Bad rss-counter state mm:00000000a9750622 type:MM_FILEPAGES val:33 [ 34.053765] BUG: Bad rss-counter state mm:00000000a9750622 type:MM_ANONPAGES val:22 [ 34.550142] BUG: Bad rss-counter state mm:00000000ceb15b00 type:MM_FILEPAGES val:33 [ 34.551382] BUG: Bad rss-counter state mm:00000000ceb15b00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27748' (ECDSA) to the list of known hosts. 2023/06/20 13:39:57 fuzzer started 2023/06/20 13:39:58 dialing manager at localhost:36067 2023/06/20 13:39:58 checking machine... 2023/06/20 13:39:58 checking revisions... [ 35.357490] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:39:58 testing simple program... [ 35.408661] cgroup: Unknown subsys name 'net' [ 35.448642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:39:57 Registers: info registers vcpu 0 RAX=ffffffff861ca72f RBX=0000000000000001 RCX=ffffffff861ca72e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800ffdf980 RSP=ffff88800ffdf8b8 R8 =ffffffff861ca732 R9 =ffff88800ffdf968 R10=0000000000038001 R11=00000000000391b0 R12=ffff88800ffdf988 R13=ffff88800ffdf970 R14=ffff88800ffdfce0 R15=ffff88800ffdf928 RIP=ffffffff81130b8f RFL=00000297 [--S-APC] 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 00007f517b5d8900 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=00007f517bb900b0 CR3=000000001ce16000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd078727580 CR3=000000000c7f0000 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=00000000000000000000000000000000 XMM01=2a587263292904adba447ab622d2900d XMM02=ec2efd57dc4c00df000000000011c1d8 XMM03=1732972ea77efb98000000000011c2a8 XMM04=0415b925a475cf3100000000000ae988 XMM05=19e9129bd510f23500000000001341a0 XMM06=4fda316b135da52b0000000000134028 XMM07=e042d86d42eb936e00000000001231f0 XMM08=1732972ea77efb98000000000011c2a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000