syzkaller login: [ 38.669644] BUG: Bad rss-counter state mm:000000008adbc70c type:MM_FILEPAGES val:33 [ 38.671191] BUG: Bad rss-counter state mm:000000008adbc70c type:MM_ANONPAGES val:22 [ 38.822306] ================================================================== [ 38.823432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.824571] Read of size 8 at addr ffff88800d945798 by task sshd/221 [ 38.825650] [ 38.825906] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.827004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.828223] Call Trace: [ 38.828624] [ 38.828966] dump_stack_lvl+0x91/0xf0 [ 38.829575] print_report+0xcc/0x620 [ 38.830154] ? __virt_addr_valid+0x102/0x340 [ 38.830837] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831594] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832363] kasan_report+0xbe/0xf0 [ 38.832940] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833690] vma_interval_tree_remove+0xc75/0xec0 [ 38.834437] vma_prepare+0xc54/0x11a0 [ 38.835030] __split_vma+0x5af/0x950 [ 38.835619] ? __pfx___split_vma+0x10/0x10 [ 38.836253] ? find_held_lock+0x2c/0x110 [ 38.836879] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.837559] ? lock_is_held_type+0x9f/0x120 [ 38.838230] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.839001] ? mtree_range_walk+0x632/0x900 [ 38.839669] ? mas_walk+0x5c7/0x7c0 [ 38.840237] do_vmi_munmap+0x1f1/0x2b0 [ 38.840829] mmap_region+0x1f9/0x2660 [ 38.841413] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.842048] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.842920] ? __pfx_lock_acquire+0x10/0x10 [ 38.843563] ? __pfx_mmap_region+0x10/0x10 [ 38.844202] ? security_mmap_addr+0x7d/0xa0 [ 38.844843] ? get_unmapped_area+0x1f5/0x3f0 [ 38.845518] do_mmap+0x854/0xf00 [ 38.846058] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.846670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.847365] ksys_mmap_pgoff+0x3af/0x500 [ 38.847994] do_syscall_64+0x3f/0x90 [ 38.848579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.849372] RIP: 0033:0x7fa84e1cad82 [ 38.849947] 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 [ 38.852573] RSP: 002b:00007ffc77143f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.853707] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa84e1cad82 [ 38.854698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa84d604000 [ 38.855501] RBP: 00007fa84d604000 R08: 0000000000000009 R09: 0000000000001000 [ 38.856303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acd5294ec0 [ 38.857100] R13: 00007ffc77143fa0 R14: 00007ffc77143fd0 R15: 00007ffc77144330 [ 38.857903] [ 38.858185] [ 38.858403] Allocated by task 214: [ 38.858809] kasan_save_stack+0x22/0x50 [ 38.859286] kasan_set_track+0x25/0x30 [ 38.859752] __kasan_slab_alloc+0x59/0x70 [ 38.860251] kmem_cache_alloc+0x16b/0x370 [ 38.860741] vm_area_dup+0x20/0x160 [ 38.861172] __split_vma+0x170/0x950 [ 38.861610] split_vma+0xc6/0x110 [ 38.862027] mprotect_fixup+0x8d2/0xb30 [ 38.862525] do_mprotect_pkey+0x87e/0xd40 [ 38.863022] __x64_sys_mprotect+0x78/0xc0 [ 38.863519] do_syscall_64+0x3f/0x90 [ 38.863968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.864573] [ 38.864776] Freed by task 214: [ 38.865164] kasan_save_stack+0x22/0x50 [ 38.865670] kasan_set_track+0x25/0x30 [ 38.866173] kasan_save_free_info+0x2b/0x50 [ 38.866800] __kasan_slab_free+0x10a/0x190 [ 38.867340] kmem_cache_free+0x10d/0x4d0 [ 38.867841] rcu_core+0x8c8/0x2860 [ 38.868278] __do_softirq+0x1b7/0x7d4 [ 38.868752] [ 38.868967] Last potentially related work creation: [ 38.869559] kasan_save_stack+0x22/0x50 [ 38.870068] __kasan_record_aux_stack+0x8e/0xa0 [ 38.870675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.871330] remove_vma+0x139/0x170 [ 38.871784] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.872334] do_vmi_munmap+0x1f1/0x2b0 [ 38.872797] __vm_munmap+0x138/0x3a0 [ 38.873244] __x64_sys_munmap+0x59/0x80 [ 38.873716] do_syscall_64+0x3f/0x90 [ 38.874166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.874785] [ 38.874988] Second to last potentially related work creation: [ 38.875637] kasan_save_stack+0x22/0x50 [ 38.876114] __kasan_record_aux_stack+0x8e/0xa0 [ 38.876679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.877329] remove_vma+0x139/0x170 [ 38.877791] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.878357] do_vmi_munmap+0x1f1/0x2b0 [ 38.878876] mmap_region+0x1f9/0x2660 [ 38.879353] do_mmap+0x854/0xf00 [ 38.879789] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.880279] ksys_mmap_pgoff+0x3af/0x500 [ 38.880776] do_syscall_64+0x3f/0x90 [ 38.881248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881908] [ 38.882123] The buggy address belongs to the object at ffff88800d945740 [ 38.882123] which belongs to the cache vm_area_struct of size 168 [ 38.883629] The buggy address is located 88 bytes inside of [ 38.883629] freed 168-byte region [ffff88800d945740, ffff88800d9457e8) [ 38.885044] [ 38.885258] The buggy address belongs to the physical page: [ 38.885926] page:00000000e30b37d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd945 [ 38.887017] memcg:ffff88800e5cad01 [ 38.887439] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.888083] page_type: 0xffffffff() [ 38.888531] raw: 0100000000000200 ffff8880087a0c80 ffffea000038cec0 dead000000000008 [ 38.889440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5cad01 [ 38.890342] page dumped because: kasan: bad access detected [ 38.891028] [ 38.891240] Memory state around the buggy address: [ 38.891813] ffff88800d945680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.892664] ffff88800d945700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.893511] >ffff88800d945780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.894359] ^ [ 38.894860] ffff88800d945800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.895707] ffff88800d945880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.896552] ================================================================== [ 38.897540] Disabling lock debugging due to kernel taint [ 40.773106] BUG: Bad rss-counter state mm:000000004cd8502c type:MM_FILEPAGES val:33 [ 40.775126] BUG: Bad rss-counter state mm:000000004cd8502c type:MM_ANONPAGES val:22 [ 41.340949] BUG: Bad rss-counter state mm:000000001172247b type:MM_FILEPAGES val:33 [ 41.342180] BUG: Bad rss-counter state mm:000000001172247b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43335' (ECDSA) to the list of known hosts. 2023/06/21 04:30:41 fuzzer started 2023/06/21 04:30:41 dialing manager at localhost:36067 2023/06/21 04:30:41 checking machine... 2023/06/21 04:30:41 checking revisions... [ 42.001646] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:30:41 testing simple program... [ 42.050673] cgroup: Unknown subsys name 'net' [ 42.106423] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:30:40 Registers: info registers vcpu 0 RAX=1ffff1100170feb2 RBX=000000000000000e RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000010 RDI=ffff88800b87f590 RBP=dffffc0000000000 RSP=ffff88800b87f490 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000010 R13=0000000000092cc0 R14=ffff88800b87f520 R15=0000000000092cc0 RIP=ffffffff813ad61a 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 00007f7f2300d900 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=00007ffeb0179000 CR3=0000000016c3c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8186b835 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffffffff8186b835 RDI=ffff88806cf09b18 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff888009552f00 RIP=ffffffff813ad470 RFL=00000286 [--S--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=00007fdc0620b0a0 CR3=0000000008ecc000 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=2030343a30333a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a30333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000