syzkaller login: [ 38.996359] BUG: Bad rss-counter state mm:0000000027c0f7a4 type:MM_FILEPAGES val:33 [ 38.998260] BUG: Bad rss-counter state mm:0000000027c0f7a4 type:MM_ANONPAGES val:22 [ 39.166711] ================================================================== [ 39.167668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.168675] Read of size 8 at addr ffff88800df3fc20 by task sshd/220 [ 39.169553] [ 39.169790] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.170863] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.171920] Call Trace: [ 39.172270] [ 39.172575] dump_stack_lvl+0x91/0xf0 [ 39.173102] print_report+0xcc/0x620 [ 39.173644] ? __virt_addr_valid+0x102/0x340 [ 39.174235] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.174896] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.175564] kasan_report+0xbe/0xf0 [ 39.176064] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.176718] vma_interval_tree_remove+0xc75/0xec0 [ 39.177346] vma_prepare+0xc54/0x11a0 [ 39.177873] __split_vma+0x5af/0x950 [ 39.178373] ? __pfx___split_vma+0x10/0x10 [ 39.178941] ? find_held_lock+0x2c/0x110 [ 39.179485] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.180094] ? lock_is_held_type+0x9f/0x120 [ 39.180664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.181310] ? mtree_range_walk+0x632/0x900 [ 39.181914] ? mas_walk+0x5c7/0x7c0 [ 39.182415] do_vmi_munmap+0x1f1/0x2b0 [ 39.182931] mmap_region+0x1f9/0x2660 [ 39.183448] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.183997] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.184745] ? __pfx_lock_acquire+0x10/0x10 [ 39.185316] ? __pfx_mmap_region+0x10/0x10 [ 39.185899] ? security_mmap_addr+0x7d/0xa0 [ 39.186467] ? get_unmapped_area+0x1f5/0x3f0 [ 39.187049] do_mmap+0x854/0xf00 [ 39.187506] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.188059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.188662] ksys_mmap_pgoff+0x3af/0x500 [ 39.189215] do_syscall_64+0x3f/0x90 [ 39.189740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.190428] RIP: 0033:0x7ff3a83ecd82 [ 39.190900] 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 [ 39.193193] RSP: 002b:00007fff43306a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.194155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3a83ecd82 [ 39.195047] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3a7826000 [ 39.195934] RBP: 00007ff3a7826000 R08: 0000000000000009 R09: 0000000000001000 [ 39.196826] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2e9418f60 [ 39.197730] R13: 00007fff43306a60 R14: 00007fff43306a90 R15: 00007fff43306df0 [ 39.198619] [ 39.198921] [ 39.199149] Allocated by task 213: [ 39.199601] kasan_save_stack+0x22/0x50 [ 39.200133] kasan_set_track+0x25/0x30 [ 39.200648] __kasan_slab_alloc+0x59/0x70 [ 39.201192] kmem_cache_alloc+0x16b/0x370 [ 39.201783] vm_area_dup+0x20/0x160 [ 39.202255] __split_vma+0x170/0x950 [ 39.202745] split_vma+0xc6/0x110 [ 39.203198] mprotect_fixup+0x8d2/0xb30 [ 39.203731] do_mprotect_pkey+0x87e/0xd40 [ 39.204285] __x64_sys_mprotect+0x78/0xc0 [ 39.204828] do_syscall_64+0x3f/0x90 [ 39.205329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.206016] [ 39.206244] Freed by task 213: [ 39.206644] kasan_save_stack+0x22/0x50 [ 39.207165] kasan_set_track+0x25/0x30 [ 39.207674] kasan_save_free_info+0x2b/0x50 [ 39.208237] __kasan_slab_free+0x10a/0x190 [ 39.208791] kmem_cache_free+0x10d/0x4d0 [ 39.209327] rcu_core+0x8c8/0x2860 [ 39.209796] __do_softirq+0x1b7/0x7d4 [ 39.210295] [ 39.210514] Last potentially related work creation: [ 39.211160] kasan_save_stack+0x22/0x50 [ 39.211686] __kasan_record_aux_stack+0x8e/0xa0 [ 39.212321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.213001] remove_vma+0x139/0x170 [ 39.213475] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.214079] do_vmi_munmap+0x1f1/0x2b0 [ 39.214588] __vm_munmap+0x138/0x3a0 [ 39.215066] __x64_sys_munmap+0x59/0x80 [ 39.215584] do_syscall_64+0x3f/0x90 [ 39.216091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.216826] [ 39.217077] Second to last potentially related work creation: [ 39.217869] kasan_save_stack+0x22/0x50 [ 39.218460] __kasan_record_aux_stack+0x8e/0xa0 [ 39.219120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.219852] remove_vma+0x139/0x170 [ 39.220376] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.221020] do_vmi_munmap+0x1f1/0x2b0 [ 39.221601] mmap_region+0x1f9/0x2660 [ 39.222154] do_mmap+0x854/0xf00 [ 39.222646] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.223200] ksys_mmap_pgoff+0x3af/0x500 [ 39.223779] do_syscall_64+0x3f/0x90 [ 39.224331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.225076] [ 39.225326] The buggy address belongs to the object at ffff88800df3fbc8 [ 39.225326] which belongs to the cache vm_area_struct of size 168 [ 39.227036] The buggy address is located 88 bytes inside of [ 39.227036] freed 168-byte region [ffff88800df3fbc8, ffff88800df3fc70) [ 39.228632] [ 39.228876] The buggy address belongs to the physical page: [ 39.229666] page:0000000065721448 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf3f [ 39.230916] memcg:ffff88800f19ae01 [ 39.231392] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.232189] page_type: 0xffffffff() [ 39.232700] raw: 0100000000000200 ffff88800879fc80 ffffea00003a9080 dead000000000005 [ 39.233792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f19ae01 [ 39.234840] page dumped because: kasan: bad access detected [ 39.235620] [ 39.235865] Memory state around the buggy address: [ 39.236536] ffff88800df3fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.237533] ffff88800df3fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.238520] >ffff88800df3fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.239497] ^ [ 39.240116] ffff88800df3fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.241099] ffff88800df3fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.242097] ================================================================== [ 39.243171] Disabling lock debugging due to kernel taint [ 41.239813] BUG: Bad rss-counter state mm:000000000b694446 type:MM_FILEPAGES val:33 [ 41.241043] BUG: Bad rss-counter state mm:000000000b694446 type:MM_ANONPAGES val:22 [ 41.786297] BUG: Bad rss-counter state mm:00000000ffd3f391 type:MM_FILEPAGES val:33 [ 41.787540] BUG: Bad rss-counter state mm:00000000ffd3f391 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8176' (ECDSA) to the list of known hosts. 2023/06/19 16:56:42 fuzzer started 2023/06/19 16:56:43 dialing manager at localhost:44161 2023/06/19 16:56:43 checking machine... 2023/06/19 16:56:43 checking revisions... [ 42.498098] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:56:43 testing simple program... [ 42.562116] cgroup: Unknown subsys name 'net' [ 42.623559] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:56:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd6392dff8 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f26df2ab51000005569faf26790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880102f7750 RSP=ffff8880102f7688 R8 =ffffffff864b024a R9 =ffff8880102f7738 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880102f7758 R13=ffff8880102f7740 R14=ffff8880102f7f58 R15=ffff8880102f76f8 RIP=ffffffff81131153 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 00007f93e3e69900 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=00007fe126a52650 CR3=000000000d5f0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=52cd17f1a1ac92bf00000000000ae988 XMM05=b8aafe474e48fc480000000000137690 XMM06=eb9f50edf499edd10000000000136430 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000