syzkaller login: [ 57.828742] BUG: Bad rss-counter state mm:00000000bf5e90e4 type:MM_FILEPAGES val:33 [ 57.830192] BUG: Bad rss-counter state mm:00000000bf5e90e4 type:MM_ANONPAGES val:22 [ 57.974749] ================================================================== [ 57.975730] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.976730] Read of size 8 at addr ffff88800e1be058 by task sshd/219 [ 57.977671] [ 57.977914] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.978844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.979883] Call Trace: [ 57.980333] [ 57.980683] dump_stack_lvl+0x91/0xf0 [ 57.981299] print_report+0xcc/0x620 [ 57.981879] ? __virt_addr_valid+0x102/0x340 [ 57.982545] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.983291] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.984034] kasan_report+0xbe/0xf0 [ 57.984629] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.985410] vma_interval_tree_remove+0xc75/0xec0 [ 57.986165] vma_prepare+0xc54/0x11a0 [ 57.986766] __split_vma+0x5af/0x950 [ 57.987352] ? __pfx___split_vma+0x10/0x10 [ 57.988014] ? find_held_lock+0x2c/0x110 [ 57.988656] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.989377] ? lock_is_held_type+0x9f/0x120 [ 57.990028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.990693] ? mtree_range_walk+0x632/0x900 [ 57.991296] ? mas_walk+0x5c7/0x7c0 [ 57.991824] do_vmi_munmap+0x1f1/0x2b0 [ 57.992365] mmap_region+0x1f9/0x2660 [ 57.992899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.993467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.994254] ? __pfx_lock_acquire+0x10/0x10 [ 57.994844] ? __pfx_mmap_region+0x10/0x10 [ 57.995428] ? security_mmap_addr+0x7d/0xa0 [ 57.996017] ? get_unmapped_area+0x1f5/0x3f0 [ 57.996630] do_mmap+0x854/0xf00 [ 57.997131] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.997679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.998298] ksys_mmap_pgoff+0x3af/0x500 [ 57.998857] do_syscall_64+0x3f/0x90 [ 57.999382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.000093] RIP: 0033:0x7f10428a7d82 [ 58.000601] 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 [ 58.002956] RSP: 002b:00007fff8fff4b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.003956] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10428a7d82 [ 58.004905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1041ce1000 [ 58.005837] RBP: 00007f1041ce1000 R08: 0000000000000009 R09: 0000000000001000 [ 58.006773] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623885a1ec0 [ 58.007708] R13: 00007fff8fff4b40 R14: 00007fff8fff4b70 R15: 00007fff8fff4ed0 [ 58.008661] [ 58.009004] [ 58.009240] Allocated by task 212: [ 58.009717] kasan_save_stack+0x22/0x50 [ 58.010272] kasan_set_track+0x25/0x30 [ 58.010823] __kasan_slab_alloc+0x59/0x70 [ 58.011404] kmem_cache_alloc+0x16b/0x370 [ 58.011972] vm_area_dup+0x20/0x160 [ 58.012474] __split_vma+0x170/0x950 [ 58.013002] split_vma+0xc6/0x110 [ 58.013489] mprotect_fixup+0x8d2/0xb30 [ 58.014045] do_mprotect_pkey+0x87e/0xd40 [ 58.014622] __x64_sys_mprotect+0x78/0xc0 [ 58.015194] do_syscall_64+0x3f/0x90 [ 58.015722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.016432] [ 58.016670] Freed by task 212: [ 58.017115] kasan_save_stack+0x22/0x50 [ 58.017674] kasan_set_track+0x25/0x30 [ 58.018212] kasan_save_free_info+0x2b/0x50 [ 58.018881] __kasan_slab_free+0x10a/0x190 [ 58.019473] kmem_cache_free+0x10d/0x4d0 [ 58.020032] rcu_core+0x8c8/0x2860 [ 58.020527] __do_softirq+0x1b7/0x7d4 [ 58.021061] [ 58.021297] Last potentially related work creation: [ 58.021945] kasan_save_stack+0x22/0x50 [ 58.022505] __kasan_record_aux_stack+0x8e/0xa0 [ 58.023135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.023846] remove_vma+0x139/0x170 [ 58.024341] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.024973] do_vmi_munmap+0x1f1/0x2b0 [ 58.025511] __vm_munmap+0x138/0x3a0 [ 58.026027] __x64_sys_munmap+0x59/0x80 [ 58.026579] do_syscall_64+0x3f/0x90 [ 58.027101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.027811] [ 58.028047] Second to last potentially related work creation: [ 58.028805] kasan_save_stack+0x22/0x50 [ 58.029361] __kasan_record_aux_stack+0x8e/0xa0 [ 58.029994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.030711] remove_vma+0x139/0x170 [ 58.031206] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.031823] do_vmi_munmap+0x1f1/0x2b0 [ 58.032359] mmap_region+0x1f9/0x2660 [ 58.032894] do_mmap+0x854/0xf00 [ 58.033369] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.033915] ksys_mmap_pgoff+0x7d/0x500 [ 58.034461] do_syscall_64+0x3f/0x90 [ 58.034982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.035694] [ 58.035929] The buggy address belongs to the object at ffff88800e1be000 [ 58.035929] which belongs to the cache vm_area_struct of size 168 [ 58.037568] The buggy address is located 88 bytes inside of [ 58.037568] freed 168-byte region [ffff88800e1be000, ffff88800e1be0a8) [ 58.039127] [ 58.039364] The buggy address belongs to the physical page: [ 58.040087] page:00000000bdb7d5b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1be [ 58.041298] memcg:ffff88800d679d01 [ 58.041774] flags: 0x100000000000200(slab|node=0|zone=1) [ 58.042492] page_type: 0xffffffff() [ 58.042992] raw: 0100000000000200 ffff88800879fc80 ffffea0000386600 dead000000000004 [ 58.044014] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d679d01 [ 58.045026] page dumped because: kasan: bad access detected [ 58.045753] [ 58.045990] Memory state around the buggy address: [ 58.046635] ffff88800e1bdf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.047584] ffff88800e1bdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.048534] >ffff88800e1be000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.049494] ^ [ 58.050288] ffff88800e1be080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 58.051231] ffff88800e1be100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.052175] ================================================================== [ 58.053201] Disabling lock debugging due to kernel taint [ 60.458018] BUG: Bad rss-counter state mm:00000000073e67ba type:MM_FILEPAGES val:33 [ 60.459297] BUG: Bad rss-counter state mm:00000000073e67ba type:MM_ANONPAGES val:22 [ 60.921861] BUG: Bad rss-counter state mm:000000006a79c256 type:MM_FILEPAGES val:33 [ 60.923343] BUG: Bad rss-counter state mm:000000006a79c256 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55845' (ECDSA) to the list of known hosts. 2023/06/19 22:56:52 fuzzer started 2023/06/19 22:56:53 dialing manager at localhost:44161 2023/06/19 22:56:53 checking machine... 2023/06/19 22:56:53 checking revisions... [ 61.670453] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:56:53 testing simple program... [ 61.721990] cgroup: Unknown subsys name 'net' [ 61.783747] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:56:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002b05e81 RSI=ffffffff81895cd3 RDI=ffff88801582f478 RBP=ffff88801582f448 RSP=ffff88801582f3a0 R8 =0000000000000001 R9 =ffff88801582f3f0 R10=0000000000038001 R11=0000000000024396 R12=ffff88801582f478 R13=0000000000000000 R14=ffff8880103351c0 R15=ffff88800f10f720 RIP=ffffffff813ad42f RFL=00000282 [--S----] 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 00007f20d3448900 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=00007f20d28d60d0 CR3=000000000ed1a000 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=2032353a36353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86096756 RDX=1ffff1100d9e135f RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff8609675a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a98 R15=ffff88806cf09a98 RIP=ffffffff811310ce 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 00007f65feeb5900 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=00007ffdcc33b000 CR3=000000000eb5c000 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