syzkaller login: [ 30.373512] BUG: Bad rss-counter state mm:000000005e7f10b1 type:MM_FILEPAGES val:33 [ 30.374724] BUG: Bad rss-counter state mm:000000005e7f10b1 type:MM_ANONPAGES val:22 [ 30.408298] ================================================================== [ 30.409390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.410511] Read of size 8 at addr ffff88800f2fba50 by task sshd/220 [ 30.411338] [ 30.411584] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.412538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.413664] Call Trace: [ 30.414051] [ 30.414399] dump_stack_lvl+0x91/0xf0 [ 30.414900] print_report+0xcc/0x620 [ 30.415380] ? __virt_addr_valid+0x102/0x340 [ 30.415933] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.416591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.417207] kasan_report+0xbe/0xf0 [ 30.417697] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.418356] vma_interval_tree_remove+0xc75/0xec0 [ 30.418997] vma_prepare+0xc54/0x11a0 [ 30.419628] __split_vma+0x5af/0x950 [ 30.420150] ? __pfx___split_vma+0x10/0x10 [ 30.420714] ? find_held_lock+0x2c/0x110 [ 30.421268] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.421869] ? lock_is_held_type+0x9f/0x120 [ 30.422429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.423076] ? mtree_range_walk+0x632/0x900 [ 30.423663] ? mas_walk+0x5c7/0x7c0 [ 30.424175] do_vmi_munmap+0x1f1/0x2b0 [ 30.424691] mmap_region+0x1f9/0x2660 [ 30.425205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.425749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.426504] ? __pfx_lock_acquire+0x10/0x10 [ 30.427070] ? __pfx_mmap_region+0x10/0x10 [ 30.427636] ? security_mmap_addr+0x7d/0xa0 [ 30.428220] ? get_unmapped_area+0x1f5/0x3f0 [ 30.428801] do_mmap+0x854/0xf00 [ 30.429259] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.429781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.430381] ksys_mmap_pgoff+0x3af/0x500 [ 30.430931] do_syscall_64+0x3f/0x90 [ 30.431432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.432144] RIP: 0033:0x7f807b1bdd82 [ 30.432629] 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 [ 30.434904] RSP: 002b:00007fff9381f508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.435872] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f807b1bdd82 [ 30.436794] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f807a5f7000 [ 30.437697] RBP: 00007f807a5f7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.438594] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5e58f7ec0 [ 30.439505] R13: 00007fff9381f520 R14: 00007fff9381f550 R15: 00007fff9381f8b0 [ 30.440425] [ 30.440730] [ 30.440958] Allocated by task 213: [ 30.441413] kasan_save_stack+0x22/0x50 [ 30.441950] kasan_set_track+0x25/0x30 [ 30.442474] __kasan_slab_alloc+0x59/0x70 [ 30.443032] kmem_cache_alloc+0x16b/0x370 [ 30.443591] vm_area_dup+0x20/0x160 [ 30.444078] __split_vma+0x170/0x950 [ 30.444594] split_vma+0xc6/0x110 [ 30.445061] mprotect_fixup+0x8d2/0xb30 [ 30.445592] do_mprotect_pkey+0x87e/0xd40 [ 30.446145] __x64_sys_mprotect+0x78/0xc0 [ 30.446701] do_syscall_64+0x3f/0x90 [ 30.447206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.447881] [ 30.448111] Freed by task 213: [ 30.448528] kasan_save_stack+0x22/0x50 [ 30.449063] kasan_set_track+0x25/0x30 [ 30.449584] kasan_save_free_info+0x2b/0x50 [ 30.450144] __kasan_slab_free+0x10a/0x190 [ 30.450710] kmem_cache_free+0x10d/0x4d0 [ 30.451247] rcu_core+0x8c8/0x2860 [ 30.451716] __do_softirq+0x1b7/0x7d4 [ 30.452254] [ 30.452478] Last potentially related work creation: [ 30.453107] kasan_save_stack+0x22/0x50 [ 30.453640] __kasan_record_aux_stack+0x8e/0xa0 [ 30.454253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.454935] remove_vma+0x139/0x170 [ 30.455412] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.456008] do_vmi_munmap+0x1f1/0x2b0 [ 30.456539] __vm_munmap+0x138/0x3a0 [ 30.457035] __x64_sys_munmap+0x59/0x80 [ 30.457555] do_syscall_64+0x3f/0x90 [ 30.458053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.458737] [ 30.458958] The buggy address belongs to the object at ffff88800f2fb9f8 [ 30.458958] which belongs to the cache vm_area_struct of size 168 [ 30.460532] The buggy address is located 88 bytes inside of [ 30.460532] freed 168-byte region [ffff88800f2fb9f8, ffff88800f2fbaa0) [ 30.462037] [ 30.462263] The buggy address belongs to the physical page: [ 30.462960] page:000000004f67260c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2fb [ 30.464123] memcg:ffff88800c6eb301 [ 30.464635] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.465328] page_type: 0xffffffff() [ 30.465811] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.466798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6eb301 [ 30.467765] page dumped because: kasan: bad access detected [ 30.468489] [ 30.468717] Memory state around the buggy address: [ 30.469346] ffff88800f2fb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.470262] ffff88800f2fb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.471170] >ffff88800f2fba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.472076] ^ [ 30.472841] ffff88800f2fba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.473748] ffff88800f2fbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.474649] ================================================================== [ 30.475727] Disabling lock debugging due to kernel taint [ 32.754823] BUG: Bad rss-counter state mm:000000008777dab8 type:MM_FILEPAGES val:33 [ 32.756016] BUG: Bad rss-counter state mm:000000008777dab8 type:MM_ANONPAGES val:22 [ 33.293974] BUG: Bad rss-counter state mm:000000001451e5f8 type:MM_FILEPAGES val:33 [ 33.295142] BUG: Bad rss-counter state mm:000000001451e5f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51230' (ECDSA) to the list of known hosts. 2023/06/21 06:29:50 fuzzer started 2023/06/21 06:29:50 dialing manager at localhost:36067 2023/06/21 06:29:50 checking machine... 2023/06/21 06:29:50 checking revisions... [ 33.939307] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:29:50 testing simple program... [ 33.988042] cgroup: Unknown subsys name 'net' [ 34.044421] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:29:50 Registers: info registers vcpu 0 RAX=ffffffff860d2fe1 RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85dba0f4 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff860d2fd0 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130a72 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 00007f511bee9900 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=00007ffc33f8b7ec CR3=000000000e6bc000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=119744f2343c588b1816481ea3b1e9b4 XMM04=3f5c686d7e1f71e4573d09e82643f110 XMM05=000000000000000000000000000000ff XMM06=115c446d341f588b1816091e2643e910 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fb87096f580 CR3=000000000ea04000 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=a3519d3fae2018a3a9492224ff5abbeb XMM02=ec2efd57dc4c00df000000000011af68 XMM03=8dbb1c0d823c913d000000000011b038 XMM04=577ec36f0fa4531b00000000000ae988 XMM05=19e9129bd510f23500000000001326f8 XMM06=8fc18e81fe23f33b0000000000131560 XMM07=e042d86d42eb936e0000000000122b00 XMM08=8dbb1c0d823c913d000000000011b038 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000