syzkaller login: [ 98.522400] BUG: Bad rss-counter state mm:00000000dab17440 type:MM_FILEPAGES val:33 [ 98.524021] BUG: Bad rss-counter state mm:00000000dab17440 type:MM_ANONPAGES val:22 [ 98.698435] ================================================================== [ 98.699355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 98.700305] Read of size 8 at addr ffff88800fc563f8 by task sshd/222 [ 98.701082] [ 98.701392] CPU: 0 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 98.702424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 98.703420] Call Trace: [ 98.703759] [ 98.704057] dump_stack_lvl+0x91/0xf0 [ 98.704553] print_report+0xcc/0x620 [ 98.705044] ? __virt_addr_valid+0x102/0x340 [ 98.705617] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.706248] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.706869] kasan_report+0xbe/0xf0 [ 98.707356] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.708022] vma_interval_tree_remove+0xc75/0xec0 [ 98.708635] vma_prepare+0xc54/0x11a0 [ 98.709116] __split_vma+0x5af/0x950 [ 98.709594] ? __pfx___split_vma+0x10/0x10 [ 98.710125] ? find_held_lock+0x2c/0x110 [ 98.710659] do_vmi_align_munmap+0x2ba/0x11f0 [ 98.711245] ? lock_is_held_type+0x9f/0x120 [ 98.711818] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 98.712430] ? mtree_range_walk+0x632/0x900 [ 98.712980] ? mas_walk+0x5c7/0x7c0 [ 98.713457] do_vmi_munmap+0x1f1/0x2b0 [ 98.713954] mmap_region+0x1f9/0x2660 [ 98.714437] ? vm_mmap_pgoff+0x15c/0x3a0 [ 98.714951] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 98.715670] ? __pfx_lock_acquire+0x10/0x10 [ 98.716224] ? __pfx_mmap_region+0x10/0x10 [ 98.716763] ? security_mmap_addr+0x7d/0xa0 [ 98.717301] ? get_unmapped_area+0x1f5/0x3f0 [ 98.717857] do_mmap+0x854/0xf00 [ 98.718311] vm_mmap_pgoff+0x1a6/0x3a0 [ 98.718809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 98.719375] ksys_mmap_pgoff+0x3af/0x500 [ 98.719916] do_syscall_64+0x3f/0x90 [ 98.720404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.721057] RIP: 0033:0x7f43a1623d82 [ 98.721530] 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 [ 98.723692] RSP: 002b:00007ffc8e0036a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 98.724618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f43a1623d82 [ 98.725487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f43a0a5d000 [ 98.726354] RBP: 00007f43a0a5d000 R08: 0000000000000009 R09: 0000000000001000 [ 98.727207] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdb0d46ec0 [ 98.728091] R13: 00007ffc8e0036c0 R14: 00007ffc8e0036f0 R15: 00007ffc8e003a50 [ 98.728945] [ 98.729241] [ 98.729456] Allocated by task 213: [ 98.729889] kasan_save_stack+0x22/0x50 [ 98.730400] kasan_set_track+0x25/0x30 [ 98.730894] __kasan_slab_alloc+0x59/0x70 [ 98.731420] kmem_cache_alloc+0x16b/0x370 [ 98.731970] vm_area_dup+0x20/0x160 [ 98.732433] __split_vma+0x170/0x950 [ 98.732905] split_vma+0xc6/0x110 [ 98.733344] mprotect_fixup+0x8d2/0xb30 [ 98.733845] do_mprotect_pkey+0x87e/0xd40 [ 98.734369] __x64_sys_mprotect+0x78/0xc0 [ 98.734890] do_syscall_64+0x3f/0x90 [ 98.735370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.736025] [ 98.736239] Freed by task 19: [ 98.736631] kasan_save_stack+0x22/0x50 [ 98.737142] kasan_set_track+0x25/0x30 [ 98.737638] kasan_save_free_info+0x2b/0x50 [ 98.738171] __kasan_slab_free+0x10a/0x190 [ 98.738709] kmem_cache_free+0x10d/0x4d0 [ 98.739219] rcu_core+0x8c8/0x2860 [ 98.739661] __do_softirq+0x1b7/0x7d4 [ 98.740163] [ 98.740379] Last potentially related work creation: [ 98.740971] kasan_save_stack+0x22/0x50 [ 98.741479] __kasan_record_aux_stack+0x8e/0xa0 [ 98.742063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 98.742718] remove_vma+0x139/0x170 [ 98.743182] do_vmi_align_munmap+0xd4a/0x11f0 [ 98.743746] do_vmi_munmap+0x1f1/0x2b0 [ 98.744244] __vm_munmap+0x138/0x3a0 [ 98.744714] __x64_sys_munmap+0x59/0x80 [ 98.745216] do_syscall_64+0x3f/0x90 [ 98.745692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.746336] [ 98.746553] The buggy address belongs to the object at ffff88800fc563a0 [ 98.746553] which belongs to the cache vm_area_struct of size 168 [ 98.748041] The buggy address is located 88 bytes inside of [ 98.748041] freed 168-byte region [ffff88800fc563a0, ffff88800fc56448) [ 98.749465] [ 98.749688] The buggy address belongs to the physical page: [ 98.750352] page:00000000180cc256 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc56 [ 98.751456] memcg:ffff88800ea00701 [ 98.751904] flags: 0x100000000000200(slab|node=0|zone=1) [ 98.752557] page_type: 0xffffffff() [ 98.753012] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 98.753945] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea00701 [ 98.754856] page dumped because: kasan: bad access detected [ 98.755520] [ 98.755735] Memory state around the buggy address: [ 98.756335] ffff88800fc56280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 98.757196] ffff88800fc56300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 98.758060] >ffff88800fc56380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 98.758915] ^ [ 98.759774] ffff88800fc56400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 98.760642] ffff88800fc56480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 98.761503] ================================================================== [ 98.762504] Disabling lock debugging due to kernel taint [ 100.546658] BUG: Bad rss-counter state mm:000000004f2c92cb type:MM_FILEPAGES val:33 [ 100.547885] BUG: Bad rss-counter state mm:000000004f2c92cb type:MM_ANONPAGES val:22 [ 100.981107] BUG: Bad rss-counter state mm:0000000035f1c67d type:MM_FILEPAGES val:33 [ 100.982198] BUG: Bad rss-counter state mm:0000000035f1c67d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44721' (ECDSA) to the list of known hosts. 2023/06/19 16:01:51 fuzzer started 2023/06/19 16:01:51 dialing manager at localhost:44161 2023/06/19 16:01:51 checking machine... 2023/06/19 16:01:51 checking revisions... [ 101.686117] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:01:52 testing simple program... [ 101.754047] cgroup: Unknown subsys name 'net' [ 101.822602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:44 Registers: info registers vcpu 0 RAX=0000000080010002 RBX=0000000000002b96 RCX=ffffffff813fb99d RDX=ffff888015dd51c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffffffff8540f240 RSP=ffff88806ce09da8 R8 =0000000000000007 R9 =00000000000f423f R10=0000000000002b96 R11=ffff88806ce09ff8 R12=ffffffff87b6b1c0 R13=000000177b119e40 R14=ffff888018e5f7c8 R15=dffffc0000000000 RIP=ffffffff814c07e4 RFL=00000093 [--S-A-C] 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 00007f9e3ab07900 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=00007fff82712000 CR3=000000000c4c6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007fbb734c9cc8 CR3=000000000fed0000 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=2031353a31303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a31303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000