syzkaller login: [ 33.673337] BUG: Bad rss-counter state mm:0000000042196538 type:MM_FILEPAGES val:33 [ 33.674546] BUG: Bad rss-counter state mm:0000000042196538 type:MM_ANONPAGES val:22 [ 33.713959] ================================================================== [ 33.714971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.716117] Read of size 8 at addr ffff888019d725c8 by task sshd/220 [ 33.716963] [ 33.717178] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.718024] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.718982] Call Trace: [ 33.719293] [ 33.719577] dump_stack_lvl+0x91/0xf0 [ 33.720055] print_report+0xcc/0x620 [ 33.720529] ? __virt_addr_valid+0x102/0x340 [ 33.721088] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.721692] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.722305] kasan_report+0xbe/0xf0 [ 33.722776] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.723393] vma_interval_tree_remove+0xc75/0xec0 [ 33.723993] vma_prepare+0xc54/0x11a0 [ 33.724459] __split_vma+0x5af/0x950 [ 33.724934] ? __pfx___split_vma+0x10/0x10 [ 33.725453] ? find_held_lock+0x2c/0x110 [ 33.725961] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.726516] ? lock_is_held_type+0x9f/0x120 [ 33.727045] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.727643] ? mtree_range_walk+0x632/0x900 [ 33.728185] ? mas_walk+0x5c7/0x7c0 [ 33.728652] do_vmi_munmap+0x1f1/0x2b0 [ 33.729152] mmap_region+0x1f9/0x2660 [ 33.729625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.730123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.730817] ? __pfx_lock_acquire+0x10/0x10 [ 33.731359] ? __pfx_mmap_region+0x10/0x10 [ 33.731889] ? security_mmap_addr+0x7d/0xa0 [ 33.732409] ? get_unmapped_area+0x1f5/0x3f0 [ 33.732952] do_mmap+0x854/0xf00 [ 33.733384] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.733869] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.734429] ksys_mmap_pgoff+0x3af/0x500 [ 33.734934] do_syscall_64+0x3f/0x90 [ 33.735404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.736039] RIP: 0033:0x7f3c4f211d82 [ 33.736493] 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 [ 33.738615] RSP: 002b:00007ffce9f79948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.739508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c4f211d82 [ 33.740339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c4e64b000 [ 33.741177] RBP: 00007f3c4e64b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.742014] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b83b86cec0 [ 33.742835] R13: 00007ffce9f79960 R14: 00007ffce9f79990 R15: 00007ffce9f79cf0 [ 33.743675] [ 33.743960] [ 33.744171] Allocated by task 213: [ 33.744591] kasan_save_stack+0x22/0x50 [ 33.745106] kasan_set_track+0x25/0x30 [ 33.745597] __kasan_slab_alloc+0x59/0x70 [ 33.746115] kmem_cache_alloc+0x16b/0x370 [ 33.746623] vm_area_dup+0x20/0x160 [ 33.747072] __split_vma+0x170/0x950 [ 33.747529] split_vma+0xc6/0x110 [ 33.747958] mprotect_fixup+0x8d2/0xb30 [ 33.748521] do_mprotect_pkey+0x87e/0xd40 [ 33.749049] __x64_sys_mprotect+0x78/0xc0 [ 33.749563] do_syscall_64+0x3f/0x90 [ 33.750033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.750658] [ 33.750868] Freed by task 213: [ 33.751253] kasan_save_stack+0x22/0x50 [ 33.751743] kasan_set_track+0x25/0x30 [ 33.752234] kasan_save_free_info+0x2b/0x50 [ 33.752750] __kasan_slab_free+0x10a/0x190 [ 33.753304] kmem_cache_free+0x10d/0x4d0 [ 33.753801] rcu_core+0x8c8/0x2860 [ 33.754237] __do_softirq+0x1b7/0x7d4 [ 33.754707] [ 33.754922] Last potentially related work creation: [ 33.755505] kasan_save_stack+0x22/0x50 [ 33.756000] __kasan_record_aux_stack+0x8e/0xa0 [ 33.756563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.757200] remove_vma+0x139/0x170 [ 33.757641] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.758192] do_vmi_munmap+0x1f1/0x2b0 [ 33.758674] __vm_munmap+0x138/0x3a0 [ 33.759139] __x64_sys_munmap+0x59/0x80 [ 33.759627] do_syscall_64+0x3f/0x90 [ 33.760090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.760721] [ 33.760941] The buggy address belongs to the object at ffff888019d72570 [ 33.760941] which belongs to the cache vm_area_struct of size 168 [ 33.762388] The buggy address is located 88 bytes inside of [ 33.762388] freed 168-byte region [ffff888019d72570, ffff888019d72618) [ 33.763762] [ 33.763975] The buggy address belongs to the physical page: [ 33.764627] page:00000000c75a7090 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d72 [ 33.765717] memcg:ffff888010392901 [ 33.766147] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.766778] page_type: 0xffffffff() [ 33.767224] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.768131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010392901 [ 33.769028] page dumped because: kasan: bad access detected [ 33.769683] [ 33.769894] Memory state around the buggy address: [ 33.770463] ffff888019d72480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.771308] ffff888019d72500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.772179] >ffff888019d72580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.773046] ^ [ 33.773703] ffff888019d72600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.774538] ffff888019d72680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.775373] ================================================================== [ 33.776283] Disabling lock debugging due to kernel taint [ 35.845925] BUG: Bad rss-counter state mm:0000000022d481d0 type:MM_FILEPAGES val:33 [ 35.847089] BUG: Bad rss-counter state mm:0000000022d481d0 type:MM_ANONPAGES val:22 [ 36.250737] BUG: Bad rss-counter state mm:00000000e626b81e type:MM_FILEPAGES val:33 [ 36.251511] BUG: Bad rss-counter state mm:00000000e626b81e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16749' (ECDSA) to the list of known hosts. 2023/06/19 22:13:15 fuzzer started 2023/06/19 22:13:15 dialing manager at localhost:44161 2023/06/19 22:13:15 checking machine... 2023/06/19 22:13:15 checking revisions... [ 36.878640] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:13:15 testing simple program... [ 36.928542] cgroup: Unknown subsys name 'net' [ 36.981915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:13:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81710ed3 RDX=ffff88801434b680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016b3fd90 RSP=ffff888016b3fbf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea00001b9940 R13=ffff8880175c4e80 R14=ffff888016b3fdb8 R15=ffffea00001b9974 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3748876900 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=00007f3748e2e0b0 CR3=000000000d580000 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=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 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=0000000000000001 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=00007fd0156f7170 CR3=000000000c5ba000 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=caed6e27efe4b2923545b10b38c1b4ee XMM02=000000000011cc98ec2efd57dc4c00df XMM03=00000000001246187b55a6c20ddd0e0b XMM04=71f0a68bc5b691d900000000000ae988 XMM05=2e25b682777bf3130000000000134f60 XMM06=c291bd5c70af25b90000000000134000 XMM07=e042d86d42eb936e0000000000124898 XMM08=7b55a6c20ddd0e0b000000000011ccf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000