syzkaller login: [ 38.764789] BUG: Bad rss-counter state mm:0000000084e1faad type:MM_FILEPAGES val:33 [ 38.765945] BUG: Bad rss-counter state mm:0000000084e1faad type:MM_ANONPAGES val:22 [ 38.932659] ================================================================== [ 38.933584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.934547] Read of size 8 at addr ffff88800de54058 by task sshd/220 [ 38.935402] [ 38.935625] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.936509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.937519] Call Trace: [ 38.937845] [ 38.938134] dump_stack_lvl+0x91/0xf0 [ 38.938639] print_report+0xcc/0x620 [ 38.939131] ? __virt_addr_valid+0x102/0x340 [ 38.939715] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.940345] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.940968] kasan_report+0xbe/0xf0 [ 38.941440] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.942068] vma_interval_tree_remove+0xc75/0xec0 [ 38.942675] vma_prepare+0xc54/0x11a0 [ 38.943157] __split_vma+0x5af/0x950 [ 38.943635] ? __pfx___split_vma+0x10/0x10 [ 38.944186] ? find_held_lock+0x2c/0x110 [ 38.944708] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.945285] ? lock_is_held_type+0x9f/0x120 [ 38.945829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.946435] ? mtree_range_walk+0x632/0x900 [ 38.946992] ? mas_walk+0x5c7/0x7c0 [ 38.947467] do_vmi_munmap+0x1f1/0x2b0 [ 38.947978] mmap_region+0x1f9/0x2660 [ 38.948466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.948993] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.949724] ? __pfx_lock_acquire+0x10/0x10 [ 38.950266] ? __pfx_mmap_region+0x10/0x10 [ 38.950804] ? security_mmap_addr+0x7d/0xa0 [ 38.951339] ? get_unmapped_area+0x1f5/0x3f0 [ 38.951917] do_mmap+0x854/0xf00 [ 38.952359] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.952864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.953428] ksys_mmap_pgoff+0x3af/0x500 [ 38.953947] do_syscall_64+0x3f/0x90 [ 38.954429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955085] RIP: 0033:0x7f3f8c1e7d82 [ 38.955542] 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 [ 38.957683] RSP: 002b:00007ffe776224b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.958606] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f8c1e7d82 [ 38.959460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f8b621000 [ 38.960328] RBP: 00007f3f8b621000 R08: 0000000000000009 R09: 0000000000001000 [ 38.961188] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619966e4ec0 [ 38.962042] R13: 00007ffe776224d0 R14: 00007ffe77622500 R15: 00007ffe77622860 [ 38.962910] [ 38.963205] [ 38.963432] Allocated by task 213: [ 38.963889] kasan_save_stack+0x22/0x50 [ 38.964399] kasan_set_track+0x25/0x30 [ 38.964895] __kasan_slab_alloc+0x59/0x70 [ 38.965420] kmem_cache_alloc+0x16b/0x370 [ 38.965945] vm_area_dup+0x20/0x160 [ 38.966404] __split_vma+0x170/0x950 [ 38.966876] split_vma+0xc6/0x110 [ 38.967316] mprotect_fixup+0x8d2/0xb30 [ 38.967838] do_mprotect_pkey+0x87e/0xd40 [ 38.968362] __x64_sys_mprotect+0x78/0xc0 [ 38.968889] do_syscall_64+0x3f/0x90 [ 38.969374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970022] [ 38.970241] Freed by task 213: [ 38.970634] kasan_save_stack+0x22/0x50 [ 38.971151] kasan_set_track+0x25/0x30 [ 38.971647] kasan_save_free_info+0x2b/0x50 [ 38.972207] __kasan_slab_free+0x10a/0x190 [ 38.972744] kmem_cache_free+0x10d/0x4d0 [ 38.973255] rcu_core+0x8c8/0x2860 [ 38.973698] __do_softirq+0x1b7/0x7d4 [ 38.974174] [ 38.974394] Last potentially related work creation: [ 38.974980] kasan_save_stack+0x22/0x50 [ 38.975485] __kasan_record_aux_stack+0x8e/0xa0 [ 38.976068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.976717] remove_vma+0x139/0x170 [ 38.977174] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.977733] do_vmi_munmap+0x1f1/0x2b0 [ 38.978222] __vm_munmap+0x138/0x3a0 [ 38.978681] __x64_sys_munmap+0x59/0x80 [ 38.979185] do_syscall_64+0x3f/0x90 [ 38.979656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980330] [ 38.980546] The buggy address belongs to the object at ffff88800de54000 [ 38.980546] which belongs to the cache vm_area_struct of size 168 [ 38.982018] The buggy address is located 88 bytes inside of [ 38.982018] freed 168-byte region [ffff88800de54000, ffff88800de540a8) [ 38.983435] [ 38.983652] The buggy address belongs to the physical page: [ 38.984330] page:000000000a73b2cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde54 [ 38.985431] memcg:ffff88800e0a4401 [ 38.985867] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.986511] page_type: 0xffffffff() [ 38.986965] raw: 0100000000000200 ffff8880087a0c80 ffffea00003553c0 dead000000000004 [ 38.987900] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a4401 [ 38.988811] page dumped because: kasan: bad access detected [ 38.989484] [ 38.989700] Memory state around the buggy address: [ 38.990283] ffff88800de53f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.991144] ffff88800de53f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.992116] >ffff88800de54000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.992967] ^ [ 38.993702] ffff88800de54080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.994581] ffff88800de54100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.995464] ================================================================== [ 38.996474] Disabling lock debugging due to kernel taint [ 40.850996] BUG: Bad rss-counter state mm:000000009dd60908 type:MM_FILEPAGES val:33 [ 40.852377] BUG: Bad rss-counter state mm:000000009dd60908 type:MM_ANONPAGES val:22 [ 41.287009] BUG: Bad rss-counter state mm:0000000098b712c2 type:MM_FILEPAGES val:33 [ 41.287915] BUG: Bad rss-counter state mm:0000000098b712c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29571' (ECDSA) to the list of known hosts. 2023/06/20 21:26:05 fuzzer started 2023/06/20 21:26:05 dialing manager at localhost:36067 2023/06/20 21:26:05 checking machine... 2023/06/20 21:26:05 checking revisions... [ 42.004377] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:26:05 testing simple program... [ 42.055976] cgroup: Unknown subsys name 'net' [ 42.116232] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:26:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880099f1980 RCX=ffff8880099f1980 RDX=000000008020001a RSI=ffff8880099f1980 RDI=ffff888008441780 RBP=ffff888016af7c68 RSP=ffff888016af7bd0 R8 =0000000080200019 R9 =0000000000000000 R10=ffffea0000267c40 R11=0000000000400021 R12=ffffea0000267c40 R13=ffff8880099f1a00 R14=0000000080200019 R15=ffff888008441780 RIP=ffffffff81809672 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 00007f8fbf4ca900 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=000055f83e478768 CR3=000000000d89c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a79f4d29b0fee09b00000000000ae988 XMM05=ed5e6243a4dbf0290000000000132a20 XMM06=4fda316b135da52b0000000000131750 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800b2c35c0 RBX=ffff88800b2c58b8 RCX=1ffff1100164fb6a RDX=dffffc0000000000 RSI=ffff88800b3a8800 RDI=ffff88800b2c58e8 RBP=ffff88800b27db20 RSP=ffff88800cbdfc28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800b3a8000 R13=0000000000000000 R14=ffff88800cfe3af8 R15=ffff88800cfe3ab0 RIP=ffffffff81847688 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 00007f34eae14900 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=00007f34eb3cc0b0 CR3=000000000f848000 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