syzkaller login: [ 65.286131] BUG: Bad rss-counter state mm:000000007e034998 type:MM_FILEPAGES val:33 [ 65.287434] BUG: Bad rss-counter state mm:000000007e034998 type:MM_ANONPAGES val:22 [ 65.460072] ================================================================== [ 65.461001] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 65.461976] Read of size 8 at addr ffff88800f0d83f8 by task sshd/220 [ 65.462766] [ 65.462995] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 65.464014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 65.465001] Call Trace: [ 65.465326] [ 65.465610] dump_stack_lvl+0x91/0xf0 [ 65.466126] print_report+0xcc/0x620 [ 65.466627] ? __virt_addr_valid+0x102/0x340 [ 65.467223] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.467863] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.468489] kasan_report+0xbe/0xf0 [ 65.468987] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.469618] vma_interval_tree_remove+0xc75/0xec0 [ 65.470263] vma_prepare+0xc54/0x11a0 [ 65.470764] __split_vma+0x5af/0x950 [ 65.471267] ? __pfx___split_vma+0x10/0x10 [ 65.471831] ? find_held_lock+0x2c/0x110 [ 65.472362] do_vmi_align_munmap+0x2ba/0x11f0 [ 65.472964] ? lock_is_held_type+0x9f/0x120 [ 65.473510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 65.474132] ? mtree_range_walk+0x632/0x900 [ 65.474695] ? mas_walk+0x5c7/0x7c0 [ 65.475220] do_vmi_munmap+0x1f1/0x2b0 [ 65.475739] mmap_region+0x1f9/0x2660 [ 65.476248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 65.476779] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 65.477516] ? __pfx_lock_acquire+0x10/0x10 [ 65.478068] ? __pfx_mmap_region+0x10/0x10 [ 65.478615] ? security_mmap_addr+0x7d/0xa0 [ 65.479198] ? get_unmapped_area+0x1f5/0x3f0 [ 65.479779] do_mmap+0x854/0xf00 [ 65.480236] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.480760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 65.481438] ksys_mmap_pgoff+0x3af/0x500 [ 65.482084] do_syscall_64+0x3f/0x90 [ 65.482679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.483521] RIP: 0033:0x7ff9e979bd82 [ 65.484099] 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 [ 65.486773] RSP: 002b:00007fff0eaea778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 65.487928] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9e979bd82 [ 65.489014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9e8bd5000 [ 65.490079] RBP: 00007ff9e8bd5000 R08: 0000000000000009 R09: 0000000000001000 [ 65.491140] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564bede70b20 [ 65.492225] R13: 00007fff0eaea790 R14: 00007fff0eaea7c0 R15: 00007fff0eaeab20 [ 65.493314] [ 65.493683] [ 65.493955] Allocated by task 213: [ 65.494511] kasan_save_stack+0x22/0x50 [ 65.495212] kasan_set_track+0x25/0x30 [ 65.495891] __kasan_slab_alloc+0x59/0x70 [ 65.496548] kmem_cache_alloc+0x16b/0x370 [ 65.497196] vm_area_dup+0x20/0x160 [ 65.497758] __split_vma+0x170/0x950 [ 65.498345] split_vma+0xc6/0x110 [ 65.498816] mprotect_fixup+0x8d2/0xb30 [ 65.499448] do_mprotect_pkey+0x87e/0xd40 [ 65.499998] __x64_sys_mprotect+0x78/0xc0 [ 65.500523] do_syscall_64+0x3f/0x90 [ 65.501017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.501684] [ 65.501910] Freed by task 13: [ 65.502301] kasan_save_stack+0x22/0x50 [ 65.502843] kasan_set_track+0x25/0x30 [ 65.503377] kasan_save_free_info+0x2b/0x50 [ 65.503955] __kasan_slab_free+0x10a/0x190 [ 65.504504] kmem_cache_free+0x10d/0x4d0 [ 65.505075] rcu_core+0x8c8/0x2860 [ 65.505528] __do_softirq+0x1b7/0x7d4 [ 65.506029] [ 65.506247] Last potentially related work creation: [ 65.506837] kasan_save_stack+0x22/0x50 [ 65.507378] __kasan_record_aux_stack+0x8e/0xa0 [ 65.507957] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.508606] remove_vma+0x139/0x170 [ 65.509098] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.509668] do_vmi_munmap+0x1f1/0x2b0 [ 65.510184] __vm_munmap+0x138/0x3a0 [ 65.510661] __x64_sys_munmap+0x59/0x80 [ 65.511204] do_syscall_64+0x3f/0x90 [ 65.511681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.512344] [ 65.512559] Second to last potentially related work creation: [ 65.513280] kasan_save_stack+0x22/0x50 [ 65.513811] __kasan_record_aux_stack+0x8e/0xa0 [ 65.514401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.515058] remove_vma+0x139/0x170 [ 65.515549] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.516125] do_vmi_munmap+0x1f1/0x2b0 [ 65.516614] mmap_region+0x1f9/0x2660 [ 65.517145] do_mmap+0x854/0xf00 [ 65.517583] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.518161] ksys_mmap_pgoff+0x3af/0x500 [ 65.518672] do_syscall_64+0x3f/0x90 [ 65.519172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.519838] [ 65.520055] The buggy address belongs to the object at ffff88800f0d83a0 [ 65.520055] which belongs to the cache vm_area_struct of size 168 [ 65.521547] The buggy address is located 88 bytes inside of [ 65.521547] freed 168-byte region [ffff88800f0d83a0, ffff88800f0d8448) [ 65.523016] [ 65.523245] The buggy address belongs to the physical page: [ 65.523931] page:00000000822eca3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0d8 [ 65.525053] memcg:ffff888013f80001 [ 65.525488] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.526149] page_type: 0xffffffff() [ 65.526613] raw: 0100000000000200 ffff88800879fc80 ffffea00003c3500 dead00000000000a [ 65.527603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f80001 [ 65.528538] page dumped because: kasan: bad access detected [ 65.529217] [ 65.529438] Memory state around the buggy address: [ 65.530040] ffff88800f0d8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 65.530928] ffff88800f0d8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 65.531837] >ffff88800f0d8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 65.532703] ^ [ 65.533575] ffff88800f0d8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 65.534453] ffff88800f0d8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.535347] ================================================================== [ 65.536352] Disabling lock debugging due to kernel taint [ 67.403040] BUG: Bad rss-counter state mm:000000004f6571b7 type:MM_FILEPAGES val:33 [ 67.404282] BUG: Bad rss-counter state mm:000000004f6571b7 type:MM_ANONPAGES val:22 [ 67.807316] BUG: Bad rss-counter state mm:0000000030df15ed type:MM_FILEPAGES val:33 [ 67.808470] BUG: Bad rss-counter state mm:0000000030df15ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41672' (ECDSA) to the list of known hosts. 2023/06/20 07:38:24 fuzzer started 2023/06/20 07:38:24 dialing manager at localhost:44161 2023/06/20 07:38:24 checking machine... 2023/06/20 07:38:24 checking revisions... [ 68.485476] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:38:24 testing simple program... [ 68.546357] cgroup: Unknown subsys name 'net' [ 68.643939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:38:20 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=00007fffa88c14f8 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=00007f2209bd5510000055fadad78790 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=0000000000000002 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000008 RSI=ffff888016517838 RDI=ffff888016517708 RBP=ffff888016517760 RSP=ffff888016517690 R8 =ffffffff860d68fa R9 =ffff888016517748 R10=0000000000038001 R11=0000000000010b7e R12=ffff888016517768 R13=ffff888016517750 R14=ffff888016517840 R15=ffff888016517708 RIP=ffffffff811303f0 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 00007f507cfcb900 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=00007f507d582618 CR3=0000000016560000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000