syzkaller login: [ 35.606349] BUG: Bad rss-counter state mm:000000009705022f type:MM_FILEPAGES val:33 [ 35.607326] BUG: Bad rss-counter state mm:000000009705022f type:MM_ANONPAGES val:22 [ 35.770194] ================================================================== [ 35.771098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.772032] Read of size 8 at addr ffff88800f608d08 by task sshd/219 [ 35.772914] [ 35.773139] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.773993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.774977] Call Trace: [ 35.775297] [ 35.775576] dump_stack_lvl+0x91/0xf0 [ 35.776064] print_report+0xcc/0x620 [ 35.776549] ? __virt_addr_valid+0x102/0x340 [ 35.777123] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.777738] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.778350] kasan_report+0xbe/0xf0 [ 35.778822] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.779435] vma_interval_tree_remove+0xc75/0xec0 [ 35.780031] vma_prepare+0xc54/0x11a0 [ 35.780507] __split_vma+0x5af/0x950 [ 35.780976] ? __pfx___split_vma+0x10/0x10 [ 35.781508] ? find_held_lock+0x2c/0x110 [ 35.782024] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.782585] ? lock_is_held_type+0x9f/0x120 [ 35.783125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.783723] ? mtree_range_walk+0x632/0x900 [ 35.784275] ? mas_walk+0x5c7/0x7c0 [ 35.784757] do_vmi_munmap+0x1f1/0x2b0 [ 35.785260] mmap_region+0x1f9/0x2660 [ 35.785744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.786250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.786961] ? __pfx_lock_acquire+0x10/0x10 [ 35.787494] ? __pfx_mmap_region+0x10/0x10 [ 35.788019] ? security_mmap_addr+0x7d/0xa0 [ 35.788549] ? get_unmapped_area+0x1f5/0x3f0 [ 35.789115] do_mmap+0x854/0xf00 [ 35.789556] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.790045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.790606] ksys_mmap_pgoff+0x3af/0x500 [ 35.791115] do_syscall_64+0x3f/0x90 [ 35.791594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.792237] RIP: 0033:0x7feb2cbe1d82 [ 35.792688] 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 [ 35.794790] RSP: 002b:00007ffc7365fdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.795681] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb2cbe1d82 [ 35.796515] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb2c01b000 [ 35.797359] RBP: 00007feb2c01b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.798188] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c5411bb20 [ 35.799024] R13: 00007ffc7365fe10 R14: 00007ffc7365fe40 R15: 00007ffc736601a0 [ 35.799869] [ 35.800159] [ 35.800378] Allocated by task 212: [ 35.800801] kasan_save_stack+0x22/0x50 [ 35.801322] kasan_set_track+0x25/0x30 [ 35.801813] __kasan_slab_alloc+0x59/0x70 [ 35.802342] kmem_cache_alloc+0x16b/0x370 [ 35.802854] vm_area_dup+0x20/0x160 [ 35.803313] __split_vma+0x170/0x950 [ 35.803776] split_vma+0xc6/0x110 [ 35.804213] mprotect_fixup+0x8d2/0xb30 [ 35.804713] do_mprotect_pkey+0x87e/0xd40 [ 35.805237] __x64_sys_mprotect+0x78/0xc0 [ 35.805755] do_syscall_64+0x3f/0x90 [ 35.806231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.806866] [ 35.807081] Freed by task 212: [ 35.807475] kasan_save_stack+0x22/0x50 [ 35.807974] kasan_set_track+0x25/0x30 [ 35.808465] kasan_save_free_info+0x2b/0x50 [ 35.808991] __kasan_slab_free+0x10a/0x190 [ 35.809542] kmem_cache_free+0x10d/0x4d0 [ 35.810053] rcu_core+0x8c8/0x2860 [ 35.810489] __do_softirq+0x1b7/0x7d4 [ 35.810965] [ 35.811182] Last potentially related work creation: [ 35.811782] kasan_save_stack+0x22/0x50 [ 35.812280] __kasan_record_aux_stack+0x8e/0xa0 [ 35.812848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.813491] remove_vma+0x139/0x170 [ 35.813939] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.814493] do_vmi_munmap+0x1f1/0x2b0 [ 35.814986] __vm_munmap+0x138/0x3a0 [ 35.815476] __x64_sys_munmap+0x59/0x80 [ 35.815966] do_syscall_64+0x3f/0x90 [ 35.816452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.817119] [ 35.817337] The buggy address belongs to the object at ffff88800f608cb0 [ 35.817337] which belongs to the cache vm_area_struct of size 168 [ 35.818810] The buggy address is located 88 bytes inside of [ 35.818810] freed 168-byte region [ffff88800f608cb0, ffff88800f608d58) [ 35.820202] [ 35.820416] The buggy address belongs to the physical page: [ 35.821073] page:0000000030dc3620 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf608 [ 35.822177] memcg:ffff88800d686c01 [ 35.822601] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.823242] page_type: 0xffffffff() [ 35.823687] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.824616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d686c01 [ 35.825514] page dumped because: kasan: bad access detected [ 35.826175] [ 35.826389] Memory state around the buggy address: [ 35.826963] ffff88800f608c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.827817] ffff88800f608c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.828668] >ffff88800f608d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.829537] ^ [ 35.829980] ffff88800f608d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.830846] ffff88800f608e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.831701] ================================================================== [ 35.832804] Disabling lock debugging due to kernel taint [ 38.398537] BUG: Bad rss-counter state mm:00000000f0ae63e5 type:MM_FILEPAGES val:33 [ 38.399920] BUG: Bad rss-counter state mm:00000000f0ae63e5 type:MM_ANONPAGES val:22 [ 38.971406] BUG: Bad rss-counter state mm:000000006c2d6302 type:MM_FILEPAGES val:33 [ 38.972375] BUG: Bad rss-counter state mm:000000006c2d6302 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11714' (ECDSA) to the list of known hosts. 2023/06/20 13:00:09 fuzzer started 2023/06/20 13:00:09 dialing manager at localhost:36067 2023/06/20 13:00:09 checking machine... 2023/06/20 13:00:09 checking revisions... [ 39.582139] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:00:09 testing simple program... [ 39.625867] cgroup: Unknown subsys name 'net' [ 39.662326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:08 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=00007ffc5072a518 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=00007febcc2c15100000555b3f0c0790 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=0000000000000007 RBX=0000000000000001 RCX=ffffffff8180effd RDX=00000000000080ef RSI=00000000000080ef RDI=ffffffff86509dac RBP=ffff888019d17930 RSP=ffff888019d17868 R8 =0000000000000000 R9 =ffff888019d17918 R10=0000000000038001 R11=0000000000020d8f R12=ffff888019d17938 R13=ffff888019d17920 R14=ffff888019d17919 R15=ffff888019d178d8 RIP=ffffffff8113078b 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 00007f29a9f1e900 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=00007ffc53cd5000 CR3=000000000ed46000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000