syzkaller login: [ 31.061772] BUG: Bad rss-counter state mm:000000007c466198 type:MM_FILEPAGES val:33 [ 31.063164] BUG: Bad rss-counter state mm:000000007c466198 type:MM_ANONPAGES val:22 [ 31.200480] ================================================================== [ 31.201581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.202731] Read of size 8 at addr ffff8880167faed8 by task sshd/226 [ 31.203675] [ 31.203935] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.205014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.206227] Call Trace: [ 31.206621] [ 31.206959] dump_stack_lvl+0x91/0xf0 [ 31.207544] print_report+0xcc/0x620 [ 31.208115] ? __virt_addr_valid+0x102/0x340 [ 31.208801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209450] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210040] kasan_report+0xbe/0xf0 [ 31.210493] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211083] vma_interval_tree_remove+0xc75/0xec0 [ 31.211651] vma_prepare+0xc54/0x11a0 [ 31.212107] __split_vma+0x5af/0x950 [ 31.212562] ? __pfx___split_vma+0x10/0x10 [ 31.213064] ? find_held_lock+0x2c/0x110 [ 31.213557] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.214111] ? lock_is_held_type+0x9f/0x120 [ 31.214641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.215241] ? mtree_range_walk+0x632/0x900 [ 31.215780] ? mas_walk+0x5c7/0x7c0 [ 31.216258] do_vmi_munmap+0x1f1/0x2b0 [ 31.216731] mmap_region+0x1f9/0x2660 [ 31.217193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.217689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.218381] ? __pfx_lock_acquire+0x10/0x10 [ 31.218901] ? __pfx_mmap_region+0x10/0x10 [ 31.219419] ? security_mmap_addr+0x7d/0xa0 [ 31.219939] ? get_unmapped_area+0x1f5/0x3f0 [ 31.220488] do_mmap+0x854/0xf00 [ 31.220924] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.221407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.221954] ksys_mmap_pgoff+0x3af/0x500 [ 31.222445] do_syscall_64+0x3f/0x90 [ 31.222914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223539] RIP: 0033:0x7f65b86ccd82 [ 31.223980] 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 [ 31.226055] RSP: 002b:00007ffffdf53158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.226924] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65b86ccd82 [ 31.227737] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65b7b06000 [ 31.228574] RBP: 00007f65b7b06000 R08: 0000000000000009 R09: 0000000000001000 [ 31.229394] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ceeba0f70 [ 31.230211] R13: 00007ffffdf53170 R14: 00007ffffdf531a0 R15: 00007ffffdf53500 [ 31.231038] [ 31.231325] [ 31.231530] Allocated by task 219: [ 31.231949] kasan_save_stack+0x22/0x50 [ 31.232455] kasan_set_track+0x25/0x30 [ 31.232934] __kasan_slab_alloc+0x59/0x70 [ 31.233445] kmem_cache_alloc+0x16b/0x370 [ 31.233952] vm_area_dup+0x20/0x160 [ 31.234399] __split_vma+0x170/0x950 [ 31.234854] split_vma+0xc6/0x110 [ 31.235272] mprotect_fixup+0x8d2/0xb30 [ 31.235791] do_mprotect_pkey+0x87e/0xd40 [ 31.236324] __x64_sys_mprotect+0x78/0xc0 [ 31.236828] do_syscall_64+0x3f/0x90 [ 31.237290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237911] [ 31.238122] Freed by task 219: [ 31.238504] kasan_save_stack+0x22/0x50 [ 31.238992] kasan_set_track+0x25/0x30 [ 31.239473] kasan_save_free_info+0x2b/0x50 [ 31.239987] __kasan_slab_free+0x10a/0x190 [ 31.240503] kmem_cache_free+0x10d/0x4d0 [ 31.241004] rcu_core+0x8c8/0x2860 [ 31.241437] __do_softirq+0x1b7/0x7d4 [ 31.241893] [ 31.242102] Last potentially related work creation: [ 31.242669] kasan_save_stack+0x22/0x50 [ 31.243151] __kasan_record_aux_stack+0x8e/0xa0 [ 31.243703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.244335] remove_vma+0x139/0x170 [ 31.244770] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.245314] do_vmi_munmap+0x1f1/0x2b0 [ 31.245784] __vm_munmap+0x138/0x3a0 [ 31.246238] __x64_sys_munmap+0x59/0x80 [ 31.246710] do_syscall_64+0x3f/0x90 [ 31.247167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247782] [ 31.247992] The buggy address belongs to the object at ffff8880167fae80 [ 31.247992] which belongs to the cache vm_area_struct of size 168 [ 31.249426] The buggy address is located 88 bytes inside of [ 31.249426] freed 168-byte region [ffff8880167fae80, ffff8880167faf28) [ 31.250788] [ 31.250998] The buggy address belongs to the physical page: [ 31.251635] page:0000000034d45832 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167fa [ 31.252710] memcg:ffff88800fd67e01 [ 31.253122] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.253743] page_type: 0xffffffff() [ 31.254178] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.255072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd67e01 [ 31.255931] page dumped because: kasan: bad access detected [ 31.256573] [ 31.256785] Memory state around the buggy address: [ 31.257350] ffff8880167fad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.258186] ffff8880167fae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.259011] >ffff8880167fae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.259827] ^ [ 31.260550] ffff8880167faf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.261382] ffff8880167faf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.262202] ================================================================== [ 31.263178] Disabling lock debugging due to kernel taint [ 33.436316] BUG: Bad rss-counter state mm:0000000010002d4c type:MM_FILEPAGES val:33 [ 33.437299] BUG: Bad rss-counter state mm:0000000010002d4c type:MM_ANONPAGES val:22 [ 33.884611] BUG: Bad rss-counter state mm:00000000004d128b type:MM_FILEPAGES val:33 [ 33.885767] BUG: Bad rss-counter state mm:00000000004d128b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29556' (ECDSA) to the list of known hosts. 2023/06/20 07:41:39 fuzzer started 2023/06/20 07:41:40 dialing manager at localhost:44161 2023/06/20 07:41:40 checking machine... 2023/06/20 07:41:40 checking revisions... [ 34.588201] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:41:40 testing simple program... [ 34.633072] cgroup: Unknown subsys name 'net' [ 34.696752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:41:39 Registers: info registers vcpu 0 RAX=0000000000020ed0 RBX=0000000000000001 RCX=ffffffff8180ee7d RDX=0000000000020edd RSI=00000000000080ee RDI=ffffffff86137cfa RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff86137cac R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130868 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 00007ff8dc6b0900 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=000056186f532818 CR3=000000000d85a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=423d9862b8a595b000000000000ae988 XMM05=258cd6e30e484ab100000000001352c0 XMM06=13e856d8d71426c80000000000134360 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81f0bfb0 RDX=ffff88800dcab680 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff88800f322000 RSP=ffff88800d6af8e8 R8 =0000000000000003 R9 =000000000000000a R10=0000000000000001 R11=63206e6f69737365 R12=ffff88800f6373c0 R13=1ffff11001ad5f22 R14=ffff88800d6af9b0 R15=0000000000000053 RIP=ffffffff814c01fc 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 00007f057f0f1900 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=00007f057f6a6650 CR3=0000000014152000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000