syzkaller login: [ 30.912498] BUG: Bad rss-counter state mm:0000000010a0c025 type:MM_FILEPAGES val:33 [ 30.913722] BUG: Bad rss-counter state mm:0000000010a0c025 type:MM_ANONPAGES val:22 [ 30.955891] ================================================================== [ 30.956931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.957883] Read of size 8 at addr ffff88801463a058 by task sshd/220 [ 30.958679] [ 30.958900] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.959775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.960765] Call Trace: [ 30.961088] [ 30.961373] dump_stack_lvl+0x91/0xf0 [ 30.961867] print_report+0xcc/0x620 [ 30.962362] ? __virt_addr_valid+0x102/0x340 [ 30.962915] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.963543] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964171] kasan_report+0xbe/0xf0 [ 30.964652] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965282] vma_interval_tree_remove+0xc75/0xec0 [ 30.965881] vma_prepare+0xc54/0x11a0 [ 30.966388] __split_vma+0x5af/0x950 [ 30.966861] ? __pfx___split_vma+0x10/0x10 [ 30.967396] ? find_held_lock+0x2c/0x110 [ 30.967919] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.968491] ? lock_is_held_type+0x9f/0x120 [ 30.969028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.969645] ? mtree_range_walk+0x632/0x900 [ 30.970209] ? mas_walk+0x5c7/0x7c0 [ 30.970687] do_vmi_munmap+0x1f1/0x2b0 [ 30.971181] mmap_region+0x1f9/0x2660 [ 30.971669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.972179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.972891] ? __pfx_lock_acquire+0x10/0x10 [ 30.973432] ? __pfx_mmap_region+0x10/0x10 [ 30.973967] ? security_mmap_addr+0x7d/0xa0 [ 30.974495] ? get_unmapped_area+0x1f5/0x3f0 [ 30.975062] do_mmap+0x854/0xf00 [ 30.975501] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.975996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.976561] ksys_mmap_pgoff+0x3af/0x500 [ 30.977072] do_syscall_64+0x3f/0x90 [ 30.977551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.978228] RIP: 0033:0x7f6efaebbd82 [ 30.978694] 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 [ 30.980853] RSP: 002b:00007ffd7e564698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.981769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6efaebbd82 [ 30.982635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6efa2f5000 [ 30.983495] RBP: 00007f6efa2f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.984354] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d0705aec0 [ 30.985201] R13: 00007ffd7e5646b0 R14: 00007ffd7e5646e0 R15: 00007ffd7e564a40 [ 30.986078] [ 30.986382] [ 30.986605] Allocated by task 213: [ 30.987046] kasan_save_stack+0x22/0x50 [ 30.987556] kasan_set_track+0x25/0x30 [ 30.988054] __kasan_slab_alloc+0x59/0x70 [ 30.988590] kmem_cache_alloc+0x16b/0x370 [ 30.989109] vm_area_dup+0x20/0x160 [ 30.989567] __split_vma+0x170/0x950 [ 30.990061] split_vma+0xc6/0x110 [ 30.990505] mprotect_fixup+0x8d2/0xb30 [ 30.991011] do_mprotect_pkey+0x87e/0xd40 [ 30.991531] __x64_sys_mprotect+0x78/0xc0 [ 30.992065] do_syscall_64+0x3f/0x90 [ 30.992543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.993192] [ 30.993412] Freed by task 213: [ 30.993886] kasan_save_stack+0x22/0x50 [ 30.994409] kasan_set_track+0x25/0x30 [ 30.994917] kasan_save_free_info+0x2b/0x50 [ 30.995455] __kasan_slab_free+0x10a/0x190 [ 30.995993] kmem_cache_free+0x10d/0x4d0 [ 30.996508] rcu_core+0x8c8/0x2860 [ 30.996959] __do_softirq+0x1b7/0x7d4 [ 30.997434] [ 30.997649] Last potentially related work creation: [ 30.998261] kasan_save_stack+0x22/0x50 [ 30.998772] __kasan_record_aux_stack+0x8e/0xa0 [ 30.999356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.000021] remove_vma+0x139/0x170 [ 31.000483] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.001048] do_vmi_munmap+0x1f1/0x2b0 [ 31.001542] __vm_munmap+0x138/0x3a0 [ 31.002022] __x64_sys_munmap+0x59/0x80 [ 31.002532] do_syscall_64+0x3f/0x90 [ 31.003018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.003670] [ 31.003891] The buggy address belongs to the object at ffff88801463a000 [ 31.003891] which belongs to the cache vm_area_struct of size 168 [ 31.005363] The buggy address is located 88 bytes inside of [ 31.005363] freed 168-byte region [ffff88801463a000, ffff88801463a0a8) [ 31.006822] [ 31.007045] The buggy address belongs to the physical page: [ 31.007706] page:00000000975c3186 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1463a [ 31.008804] memcg:ffff888015e82901 [ 31.009231] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.009886] page_type: 0xffffffff() [ 31.010362] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.011284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e82901 [ 31.012212] page dumped because: kasan: bad access detected [ 31.012883] [ 31.013100] Memory state around the buggy address: [ 31.013682] ffff888014639f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.014558] ffff888014639f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.015428] >ffff88801463a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.016288] ^ [ 31.017019] ffff88801463a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.017887] ffff88801463a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.018771] ================================================================== [ 31.019722] Disabling lock debugging due to kernel taint [ 32.885470] BUG: Bad rss-counter state mm:000000008e1d42d1 type:MM_FILEPAGES val:33 [ 32.886645] BUG: Bad rss-counter state mm:000000008e1d42d1 type:MM_ANONPAGES val:22 [ 33.424002] BUG: Bad rss-counter state mm:00000000eef2bc4b type:MM_FILEPAGES val:33 [ 33.425270] BUG: Bad rss-counter state mm:00000000eef2bc4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63433' (ECDSA) to the list of known hosts. 2023/06/19 11:30:48 fuzzer started 2023/06/19 11:30:49 dialing manager at localhost:44161 2023/06/19 11:30:49 checking machine... 2023/06/19 11:30:49 checking revisions... [ 34.072425] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:30:49 testing simple program... [ 34.126156] cgroup: Unknown subsys name 'net' [ 34.164074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:30:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f117f18c01c CR3=0000000019f6c000 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=30333a3131203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038343a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363736 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=ffffffff814c8421 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800ef879b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f117f6cb477 R13=0000000000000000 R14=ffff888009e2d1c0 R15=ffff888018e03e40 RIP=ffffffff814c0388 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 00007f117f1d8900 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=00007f117f7900b0 CR3=0000000016f96000 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=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