syzkaller login: [ 31.898643] BUG: Bad rss-counter state mm:00000000b751e624 type:MM_FILEPAGES val:33 [ 31.900035] BUG: Bad rss-counter state mm:00000000b751e624 type:MM_ANONPAGES val:22 [ 31.974326] ================================================================== [ 31.975230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.976170] Read of size 8 at addr ffff888016c92228 by task sshd/220 [ 31.976944] [ 31.977160] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.978159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.979134] Call Trace: [ 31.979458] [ 31.979760] dump_stack_lvl+0x91/0xf0 [ 31.980250] print_report+0xcc/0x620 [ 31.980739] ? __virt_addr_valid+0x102/0x340 [ 31.981293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.981942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.982570] kasan_report+0xbe/0xf0 [ 31.983048] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.983677] vma_interval_tree_remove+0xc75/0xec0 [ 31.984294] vma_prepare+0xc54/0x11a0 [ 31.984776] __split_vma+0x5af/0x950 [ 31.985257] ? __pfx___split_vma+0x10/0x10 [ 31.985808] ? find_held_lock+0x2c/0x110 [ 31.986334] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.986902] ? lock_is_held_type+0x9f/0x120 [ 31.987445] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.988054] ? mtree_range_walk+0x632/0x900 [ 31.988606] ? mas_walk+0x5c7/0x7c0 [ 31.989083] do_vmi_munmap+0x1f1/0x2b0 [ 31.989584] mmap_region+0x1f9/0x2660 [ 31.990077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.990588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.991306] ? __pfx_lock_acquire+0x10/0x10 [ 31.991839] ? __pfx_mmap_region+0x10/0x10 [ 31.992369] ? security_mmap_addr+0x7d/0xa0 [ 31.992902] ? get_unmapped_area+0x1f5/0x3f0 [ 31.993475] do_mmap+0x854/0xf00 [ 31.993919] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.994413] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.994983] ksys_mmap_pgoff+0x3af/0x500 [ 31.995494] do_syscall_64+0x3f/0x90 [ 31.995974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.996622] RIP: 0033:0x7f17822fdd82 [ 31.997082] 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 [ 31.999240] RSP: 002b:00007ffce711ed98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.000160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17822fdd82 [ 32.001014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1781737000 [ 32.001870] RBP: 00007f1781737000 R08: 0000000000000009 R09: 0000000000001000 [ 32.002727] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e627ddd90 [ 32.003591] R13: 00007ffce711edb0 R14: 00007ffce711ede0 R15: 00007ffce711f140 [ 32.004450] [ 32.004744] [ 32.004963] Allocated by task 213: [ 32.005406] kasan_save_stack+0x22/0x50 [ 32.005912] kasan_set_track+0x25/0x30 [ 32.006403] __kasan_slab_alloc+0x59/0x70 [ 32.006932] kmem_cache_alloc+0x16b/0x370 [ 32.007463] vm_area_dup+0x20/0x160 [ 32.007917] __split_vma+0x170/0x950 [ 32.008385] split_vma+0xc6/0x110 [ 32.008830] mprotect_fixup+0x8d2/0xb30 [ 32.009339] do_mprotect_pkey+0x87e/0xd40 [ 32.009874] __x64_sys_mprotect+0x78/0xc0 [ 32.010392] do_syscall_64+0x3f/0x90 [ 32.010864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.011508] [ 32.011730] Freed by task 213: [ 32.012128] kasan_save_stack+0x22/0x50 [ 32.012631] kasan_set_track+0x25/0x30 [ 32.013121] kasan_save_free_info+0x2b/0x50 [ 32.013663] __kasan_slab_free+0x10a/0x190 [ 32.014205] kmem_cache_free+0x10d/0x4d0 [ 32.014712] rcu_core+0x8c8/0x2860 [ 32.015160] __do_softirq+0x1b7/0x7d4 [ 32.015634] [ 32.015852] Last potentially related work creation: [ 32.016435] kasan_save_stack+0x22/0x50 [ 32.016935] __kasan_record_aux_stack+0x8e/0xa0 [ 32.017547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.018198] remove_vma+0x139/0x170 [ 32.018660] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.019215] do_vmi_munmap+0x1f1/0x2b0 [ 32.019701] __vm_munmap+0x138/0x3a0 [ 32.020170] __x64_sys_munmap+0x59/0x80 [ 32.020662] do_syscall_64+0x3f/0x90 [ 32.021132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.021777] [ 32.021998] The buggy address belongs to the object at ffff888016c921d0 [ 32.021998] which belongs to the cache vm_area_struct of size 168 [ 32.023455] The buggy address is located 88 bytes inside of [ 32.023455] freed 168-byte region [ffff888016c921d0, ffff888016c92278) [ 32.024851] [ 32.025064] The buggy address belongs to the physical page: [ 32.025744] page:000000002a21d23e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c92 [ 32.026850] memcg:ffff888014691201 [ 32.027301] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.027948] page_type: 0xffffffff() [ 32.028401] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.029325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014691201 [ 32.030249] page dumped because: kasan: bad access detected [ 32.030908] [ 32.031123] Memory state around the buggy address: [ 32.031708] ffff888016c92100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.032578] ffff888016c92180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.033429] >ffff888016c92200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.034294] ^ [ 32.034850] ffff888016c92280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.035715] ffff888016c92300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.036569] ================================================================== [ 32.037726] Disabling lock debugging due to kernel taint [ 34.163841] BUG: Bad rss-counter state mm:00000000fe2bbecb type:MM_FILEPAGES val:33 [ 34.164851] BUG: Bad rss-counter state mm:00000000fe2bbecb type:MM_ANONPAGES val:22 [ 34.583270] BUG: Bad rss-counter state mm:0000000007fc780f type:MM_FILEPAGES val:33 [ 34.584244] BUG: Bad rss-counter state mm:0000000007fc780f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20848' (ECDSA) to the list of known hosts. 2023/06/20 02:22:00 fuzzer started 2023/06/20 02:22:01 dialing manager at localhost:44161 2023/06/20 02:22:01 checking machine... 2023/06/20 02:22:01 checking revisions... [ 35.272537] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:22:01 testing simple program... [ 35.316820] cgroup: Unknown subsys name 'net' [ 35.365501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:21:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8450c03d RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88800fca7f18 RDI=ffffffff8450c03d RBP=ffffffff8450c03d RSP=ffff88806ce09a40 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001047e R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801a0d51c0 R15=ffff88801a36f410 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 00007f14ca744900 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=00007ffef69ae000 CR3=0000000015eb6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f0410a3b530 CR3=000000000da00000 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=2030303a32323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a32323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000