syzkaller login: [ 69.903588] BUG: Bad rss-counter state mm:00000000cc09dc38 type:MM_FILEPAGES val:33 [ 69.904815] BUG: Bad rss-counter state mm:00000000cc09dc38 type:MM_ANONPAGES val:22 [ 69.945403] ================================================================== [ 69.946407] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.947409] Read of size 8 at addr ffff888010214310 by task sshd/219 [ 69.948220] [ 69.948440] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.949494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.950499] Call Trace: [ 69.950825] [ 69.951110] dump_stack_lvl+0x91/0xf0 [ 69.951612] print_report+0xcc/0x620 [ 69.952101] ? __virt_addr_valid+0x102/0x340 [ 69.952675] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.953298] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.953923] kasan_report+0xbe/0xf0 [ 69.954418] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.955046] vma_interval_tree_remove+0xc75/0xec0 [ 69.955663] vma_prepare+0xc54/0x11a0 [ 69.956157] __split_vma+0x5af/0x950 [ 69.956627] ? __pfx___split_vma+0x10/0x10 [ 69.957165] ? find_held_lock+0x2c/0x110 [ 69.957689] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.958268] ? lock_is_held_type+0x9f/0x120 [ 69.958811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.959443] ? mtree_range_walk+0x632/0x900 [ 69.960050] ? mas_walk+0x5c7/0x7c0 [ 69.960530] do_vmi_munmap+0x1f1/0x2b0 [ 69.961036] mmap_region+0x1f9/0x2660 [ 69.961524] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.962049] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.962763] ? __pfx_lock_acquire+0x10/0x10 [ 69.963298] ? __pfx_mmap_region+0x10/0x10 [ 69.963848] ? security_mmap_addr+0x7d/0xa0 [ 69.964391] ? get_unmapped_area+0x1f5/0x3f0 [ 69.964958] do_mmap+0x854/0xf00 [ 69.965419] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.965935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.966516] ksys_mmap_pgoff+0x3af/0x500 [ 69.967036] do_syscall_64+0x3f/0x90 [ 69.967527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.968224] RIP: 0033:0x7f093911bd82 [ 69.968702] 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 [ 69.970890] RSP: 002b:00007ffc1d9c5028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.971802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f093911bd82 [ 69.972663] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0938555000 [ 69.973515] RBP: 00007f0938555000 R08: 0000000000000009 R09: 0000000000001000 [ 69.974376] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f52d53f70 [ 69.975236] R13: 00007ffc1d9c5040 R14: 00007ffc1d9c5070 R15: 00007ffc1d9c53d0 [ 69.976121] [ 69.976416] [ 69.976631] Allocated by task 212: [ 69.977062] kasan_save_stack+0x22/0x50 [ 69.977566] kasan_set_track+0x25/0x30 [ 69.978063] __kasan_slab_alloc+0x59/0x70 [ 69.978606] kmem_cache_alloc+0x16b/0x370 [ 69.979126] vm_area_dup+0x20/0x160 [ 69.979608] __split_vma+0x170/0x950 [ 69.980092] split_vma+0xc6/0x110 [ 69.980537] mprotect_fixup+0x8d2/0xb30 [ 69.981048] do_mprotect_pkey+0x87e/0xd40 [ 69.981570] __x64_sys_mprotect+0x78/0xc0 [ 69.982106] do_syscall_64+0x3f/0x90 [ 69.982605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.983249] [ 69.983468] Freed by task 203: [ 69.983872] kasan_save_stack+0x22/0x50 [ 69.984400] kasan_set_track+0x25/0x30 [ 69.984896] kasan_save_free_info+0x2b/0x50 [ 69.985434] __kasan_slab_free+0x10a/0x190 [ 69.985968] kmem_cache_free+0x10d/0x4d0 [ 69.986488] rcu_core+0x8c8/0x2860 [ 69.986941] __do_softirq+0x1b7/0x7d4 [ 69.987423] [ 69.987666] Last potentially related work creation: [ 69.988255] kasan_save_stack+0x22/0x50 [ 69.988766] __kasan_record_aux_stack+0x8e/0xa0 [ 69.989347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.990010] remove_vma+0x139/0x170 [ 69.990477] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.991041] do_vmi_munmap+0x1f1/0x2b0 [ 69.991538] __vm_munmap+0x138/0x3a0 [ 69.992021] __x64_sys_munmap+0x59/0x80 [ 69.992518] do_syscall_64+0x3f/0x90 [ 69.993001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.993645] [ 69.993869] The buggy address belongs to the object at ffff8880102142b8 [ 69.993869] which belongs to the cache vm_area_struct of size 168 [ 69.995364] The buggy address is located 88 bytes inside of [ 69.995364] freed 168-byte region [ffff8880102142b8, ffff888010214360) [ 69.996819] [ 69.997042] The buggy address belongs to the physical page: [ 69.997704] page:000000008bb87e6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10214 [ 69.998822] memcg:ffff88800ed25701 [ 69.999258] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 69.999978] page_type: 0xffffffff() [ 70.000433] raw: 0100000000000200 ffff88800879fc80 ffffea00003cb300 dead000000000003 [ 70.001364] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed25701 [ 70.002293] page dumped because: kasan: bad access detected [ 70.002964] [ 70.003194] Memory state around the buggy address: [ 70.003788] ffff888010214200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 70.004641] ffff888010214280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 70.005515] >ffff888010214300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 70.006384] ^ [ 70.006860] ffff888010214380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 70.007749] ffff888010214400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 70.008612] ================================================================== [ 70.009908] Disabling lock debugging due to kernel taint [ 72.125826] BUG: Bad rss-counter state mm:000000002f971f82 type:MM_FILEPAGES val:33 [ 72.126774] BUG: Bad rss-counter state mm:000000002f971f82 type:MM_ANONPAGES val:22 [ 72.616905] BUG: Bad rss-counter state mm:00000000dc525f03 type:MM_FILEPAGES val:33 [ 72.618076] BUG: Bad rss-counter state mm:00000000dc525f03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34306' (ECDSA) to the list of known hosts. 2023/06/19 16:48:44 fuzzer started 2023/06/19 16:48:44 dialing manager at localhost:44161 2023/06/19 16:48:44 checking machine... 2023/06/19 16:48:44 checking revisions... [ 73.294492] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:48:44 testing simple program... [ 73.350486] cgroup: Unknown subsys name 'net' [ 73.422391] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:48:13 Registers: info registers vcpu 0 RAX=0000000000000078 RBX=ffff88800de605f0 RCX=00000000030471c0 RDX=0000000003047180 RSI=0000000000092c40 RDI=0000000003047180 RBP=ffff88801756f848 RSP=ffff88801756f800 R8 =ffff88800de60130 R9 =000000000003de00 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffffffff818470dc RIP=ffffffff81807e4f 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 00007f648daab700 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=00007f7243fc8650 CR3=000000000c9ae000 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=2033343a38343a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a38343a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83639305 RDX=dffffc0000000000 RSI=0000000000026393 RDI=ffff88800e69f310 RBP=ffff88800e69f368 RSP=ffff88800e69f2a0 R8 =0000000000000001 R9 =ffff88800e69f350 R10=0000000000038001 R11=0000000000091be7 R12=ffff88800e69f370 R13=ffff88800e69f358 R14=ffff88800e69f351 R15=ffff88800e69f310 RIP=ffffffff81130764 RFL=00000287 [--S--PC] 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 00007f7243a13900 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=00007fff26165000 CR3=000000001ab90000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000