syzkaller login: [ 60.421126] BUG: Bad rss-counter state mm:00000000911ec610 type:MM_FILEPAGES val:33 [ 60.423169] BUG: Bad rss-counter state mm:00000000911ec610 type:MM_ANONPAGES val:22 [ 60.553276] ================================================================== [ 60.553981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.554704] Read of size 8 at addr ffff888013ef03f8 by task sshd/220 [ 60.555299] [ 60.555473] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 60.556142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.556901] Call Trace: [ 60.557219] [ 60.557478] dump_stack_lvl+0x91/0xf0 [ 60.557854] print_report+0xcc/0x620 [ 60.558217] ? __virt_addr_valid+0x102/0x340 [ 60.558650] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.559126] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.559850] kasan_report+0xbe/0xf0 [ 60.560490] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.561336] vma_interval_tree_remove+0xc75/0xec0 [ 60.562129] vma_prepare+0xc54/0x11a0 [ 60.562758] __split_vma+0x5af/0x950 [ 60.563389] ? __pfx___split_vma+0x10/0x10 [ 60.564104] ? find_held_lock+0x2c/0x110 [ 60.564813] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.565569] ? lock_is_held_type+0x9f/0x120 [ 60.566282] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.567100] ? mtree_range_walk+0x632/0x900 [ 60.567837] ? mas_walk+0x5c7/0x7c0 [ 60.568454] do_vmi_munmap+0x1f1/0x2b0 [ 60.569139] mmap_region+0x1f9/0x2660 [ 60.569726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.570313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.571137] ? __pfx_lock_acquire+0x10/0x10 [ 60.571749] ? __pfx_mmap_region+0x10/0x10 [ 60.572360] ? security_mmap_addr+0x7d/0xa0 [ 60.572986] ? get_unmapped_area+0x1f5/0x3f0 [ 60.573615] do_mmap+0x854/0xf00 [ 60.574114] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.574671] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.575317] ksys_mmap_pgoff+0x3af/0x500 [ 60.575900] do_syscall_64+0x3f/0x90 [ 60.576451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.577202] RIP: 0033:0x7f9fff216d82 [ 60.577717] 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 [ 60.580160] RSP: 002b:00007fffd8035a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.581218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fff216d82 [ 60.582180] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ffe650000 [ 60.583124] RBP: 00007f9ffe650000 R08: 0000000000000009 R09: 0000000000001000 [ 60.584067] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584fc666ec0 [ 60.585022] R13: 00007fffd8035a50 R14: 00007fffd8035a80 R15: 00007fffd8035de0 [ 60.585985] [ 60.586314] [ 60.586559] Allocated by task 213: [ 60.587060] kasan_save_stack+0x22/0x50 [ 60.587640] kasan_set_track+0x25/0x30 [ 60.588208] __kasan_slab_alloc+0x59/0x70 [ 60.588821] kmem_cache_alloc+0x16b/0x370 [ 60.589419] vm_area_dup+0x20/0x160 [ 60.589944] __split_vma+0x170/0x950 [ 60.590484] split_vma+0xc6/0x110 [ 60.590987] mprotect_fixup+0x8d2/0xb30 [ 60.591563] do_mprotect_pkey+0x87e/0xd40 [ 60.592160] __x64_sys_mprotect+0x78/0xc0 [ 60.592768] do_syscall_64+0x3f/0x90 [ 60.593311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.594044] [ 60.594297] Freed by task 213: [ 60.594751] kasan_save_stack+0x22/0x50 [ 60.595322] kasan_set_track+0x25/0x30 [ 60.595888] kasan_save_free_info+0x2b/0x50 [ 60.596505] __kasan_slab_free+0x10a/0x190 [ 60.597127] kmem_cache_free+0x10d/0x4d0 [ 60.597714] rcu_core+0x8c8/0x2860 [ 60.598226] __do_softirq+0x1b7/0x7d4 [ 60.598758] [ 60.599003] Last potentially related work creation: [ 60.599677] kasan_save_stack+0x22/0x50 [ 60.600262] __kasan_record_aux_stack+0x8e/0xa0 [ 60.600927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.601668] remove_vma+0x139/0x170 [ 60.602187] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.602828] do_vmi_munmap+0x1f1/0x2b0 [ 60.603384] __vm_munmap+0x138/0x3a0 [ 60.603904] __x64_sys_munmap+0x59/0x80 [ 60.604463] do_syscall_64+0x3f/0x90 [ 60.605010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.605726] [ 60.605970] The buggy address belongs to the object at ffff888013ef03a0 [ 60.605970] which belongs to the cache vm_area_struct of size 168 [ 60.607620] The buggy address is located 88 bytes inside of [ 60.607620] freed 168-byte region [ffff888013ef03a0, ffff888013ef0448) [ 60.609186] [ 60.609425] The buggy address belongs to the physical page: [ 60.610155] page:0000000047eb154b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13ef0 [ 60.611375] memcg:ffff88800f5e1a01 [ 60.611845] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.612572] page_type: 0xffffffff() [ 60.613092] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.614168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5e1a01 [ 60.615225] page dumped because: kasan: bad access detected [ 60.615996] [ 60.616246] Memory state around the buggy address: [ 60.616928] ffff888013ef0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 60.617927] ffff888013ef0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 60.618923] >ffff888013ef0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.619911] ^ [ 60.620908] ffff888013ef0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.621905] ffff888013ef0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.622899] ================================================================== [ 60.624138] Disabling lock debugging due to kernel taint [ 62.386491] BUG: Bad rss-counter state mm:000000003c86835b type:MM_FILEPAGES val:33 [ 62.387538] BUG: Bad rss-counter state mm:000000003c86835b type:MM_ANONPAGES val:22 [ 62.867174] BUG: Bad rss-counter state mm:0000000084a27a32 type:MM_FILEPAGES val:33 [ 62.868455] BUG: Bad rss-counter state mm:0000000084a27a32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6549' (ECDSA) to the list of known hosts. 2023/06/19 23:57:15 fuzzer started 2023/06/19 23:57:16 dialing manager at localhost:44161 2023/06/19 23:57:16 checking machine... 2023/06/19 23:57:16 checking revisions... [ 63.604016] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:57:16 testing simple program... [ 63.664343] cgroup: Unknown subsys name 'net' [ 63.737772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:57:15 Registers: info registers vcpu 0 RAX=ffffffff81ef60ea RBX=0000000000000002 RCX=0000000000000001 RDX=0000000000000800 RSI=000000000000000c RDI=ffff8880168e7b08 RBP=dffffc0000000000 RSP=ffff8880168e7a48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000c R13=0000000000000800 R14=ffff8880168e7af8 R15=ffff88801bc71390 RIP=ffffffff813ad5f9 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 00007f9f2947d900 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=00007f9f29a350b0 CR3=0000000019fbe000 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=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 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=ffff888008c58400 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=00007f6ef7903850 CR3=0000000015fba000 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=2035313a37353a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000