syzkaller login: [ 30.935118] BUG: Bad rss-counter state mm:0000000074231852 type:MM_FILEPAGES val:33 [ 30.936336] BUG: Bad rss-counter state mm:0000000074231852 type:MM_ANONPAGES val:22 [ 31.098347] ================================================================== [ 31.099199] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.100070] Read of size 8 at addr ffff88800d94d310 by task sshd/221 [ 31.100793] [ 31.101000] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.101996] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.102920] Call Trace: [ 31.103217] [ 31.103488] dump_stack_lvl+0x91/0xf0 [ 31.103971] print_report+0xcc/0x620 [ 31.104426] ? __virt_addr_valid+0x102/0x340 [ 31.104937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105520] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106106] kasan_report+0xbe/0xf0 [ 31.106572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.107162] vma_interval_tree_remove+0xc75/0xec0 [ 31.107753] vma_prepare+0xc54/0x11a0 [ 31.108206] __split_vma+0x5af/0x950 [ 31.108670] ? __pfx___split_vma+0x10/0x10 [ 31.109177] ? find_held_lock+0x2c/0x110 [ 31.109685] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.110226] ? lock_is_held_type+0x9f/0x120 [ 31.110752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.111326] ? mtree_range_walk+0x632/0x900 [ 31.111853] ? mas_walk+0x5c7/0x7c0 [ 31.112309] do_vmi_munmap+0x1f1/0x2b0 [ 31.112790] mmap_region+0x1f9/0x2660 [ 31.113244] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.113743] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.114437] ? __pfx_lock_acquire+0x10/0x10 [ 31.114952] ? __pfx_mmap_region+0x10/0x10 [ 31.115473] ? security_mmap_addr+0x7d/0xa0 [ 31.115995] ? get_unmapped_area+0x1f5/0x3f0 [ 31.116525] do_mmap+0x854/0xf00 [ 31.116942] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.117416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.117963] ksys_mmap_pgoff+0x3af/0x500 [ 31.118455] do_syscall_64+0x3f/0x90 [ 31.118923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119547] RIP: 0033:0x7fecca226d82 [ 31.119989] 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 [ 31.122041] RSP: 002b:00007ffc36984298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.122933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fecca226d82 [ 31.123749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fecc9660000 [ 31.124571] RBP: 00007fecc9660000 R08: 0000000000000009 R09: 0000000000001000 [ 31.125390] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adee0f4b20 [ 31.126202] R13: 00007ffc369842b0 R14: 00007ffc369842e0 R15: 00007ffc36984640 [ 31.127042] [ 31.127320] [ 31.127527] Allocated by task 214: [ 31.127940] kasan_save_stack+0x22/0x50 [ 31.128419] kasan_set_track+0x25/0x30 [ 31.128889] __kasan_slab_alloc+0x59/0x70 [ 31.129401] kmem_cache_alloc+0x16b/0x370 [ 31.129897] vm_area_dup+0x20/0x160 [ 31.130341] __split_vma+0x170/0x950 [ 31.130790] split_vma+0xc6/0x110 [ 31.131211] mprotect_fixup+0x8d2/0xb30 [ 31.131706] do_mprotect_pkey+0x87e/0xd40 [ 31.132213] __x64_sys_mprotect+0x78/0xc0 [ 31.132725] do_syscall_64+0x3f/0x90 [ 31.133172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133801] [ 31.134012] Freed by task 214: [ 31.134400] kasan_save_stack+0x22/0x50 [ 31.134900] kasan_set_track+0x25/0x30 [ 31.135378] kasan_save_free_info+0x2b/0x50 [ 31.135899] __kasan_slab_free+0x10a/0x190 [ 31.136428] kmem_cache_free+0x10d/0x4d0 [ 31.136933] rcu_core+0x8c8/0x2860 [ 31.137364] __do_softirq+0x1b7/0x7d4 [ 31.137834] [ 31.138046] Last potentially related work creation: [ 31.138622] kasan_save_stack+0x22/0x50 [ 31.139108] __kasan_record_aux_stack+0x8e/0xa0 [ 31.139666] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.140305] remove_vma+0x139/0x170 [ 31.140754] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.141293] do_vmi_munmap+0x1f1/0x2b0 [ 31.141775] __vm_munmap+0x138/0x3a0 [ 31.142239] __x64_sys_munmap+0x59/0x80 [ 31.142752] do_syscall_64+0x3f/0x90 [ 31.143316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.143958] [ 31.144172] The buggy address belongs to the object at ffff88800d94d2b8 [ 31.144172] which belongs to the cache vm_area_struct of size 168 [ 31.145615] The buggy address is located 88 bytes inside of [ 31.145615] freed 168-byte region [ffff88800d94d2b8, ffff88800d94d360) [ 31.147018] [ 31.147236] The buggy address belongs to the physical page: [ 31.147890] page:00000000d0165712 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd94d [ 31.148946] memcg:ffff888019b85b01 [ 31.149360] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.149995] page_type: 0xffffffff() [ 31.150448] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.151338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b85b01 [ 31.152222] page dumped because: kasan: bad access detected [ 31.152871] [ 31.153078] Memory state around the buggy address: [ 31.153642] ffff88800d94d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.154486] ffff88800d94d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.155327] >ffff88800d94d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.156172] ^ [ 31.156634] ffff88800d94d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.157463] ffff88800d94d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.158302] ================================================================== [ 31.159234] Disabling lock debugging due to kernel taint [ 33.108217] BUG: Bad rss-counter state mm:00000000609ca38c type:MM_FILEPAGES val:33 [ 33.109172] BUG: Bad rss-counter state mm:00000000609ca38c type:MM_ANONPAGES val:22 [ 33.586632] BUG: Bad rss-counter state mm:000000005f48a710 type:MM_FILEPAGES val:33 [ 33.587638] BUG: Bad rss-counter state mm:000000005f48a710 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49997' (ECDSA) to the list of known hosts. 2023/06/21 06:55:36 fuzzer started 2023/06/21 06:55:36 dialing manager at localhost:36067 2023/06/21 06:55:36 checking machine... 2023/06/21 06:55:36 checking revisions... [ 34.322091] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:55:36 testing simple program... [ 34.364290] cgroup: Unknown subsys name 'net' [ 34.406203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:55:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffe6445f548 CR3=000000000e418000 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=2035333a35353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35353a3630203132 XMM08=00007f5c880119200000005700000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=1ffff1100263afac RCX=ffffffff81718859 RDX=ffff88800f2951c0 RSI=0000000000000000 RDI=0000000000000005 RBP=800000001c8c3065 RSP=ffff8880131d7d38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801935ebe8 R13=0000000000000a55 R14=0000000000000000 R15=000000000e601067 RIP=ffffffff814c0261 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faaf0a29900 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=00007faaf157d044 CR3=000000000e21e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=a262ae8cce20dd7f47d6d1cf734fe984 XMM05=000000000000000000000000000000ff XMM06=62624f8c8520d17f4747d139734f9400 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000