syzkaller login: [ 31.575812] BUG: Bad rss-counter state mm:0000000070321ac3 type:MM_FILEPAGES val:33 [ 31.577198] BUG: Bad rss-counter state mm:0000000070321ac3 type:MM_ANONPAGES val:22 [ 31.714570] ================================================================== [ 31.715671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.716657] Read of size 8 at addr ffff88800e11bed8 by task sshd/219 [ 31.717515] [ 31.717732] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.718603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.719620] Call Trace: [ 31.719944] [ 31.720233] dump_stack_lvl+0x91/0xf0 [ 31.720725] print_report+0xcc/0x620 [ 31.721213] ? __virt_addr_valid+0x102/0x340 [ 31.721765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.722396] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.723022] kasan_report+0xbe/0xf0 [ 31.723522] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.724152] vma_interval_tree_remove+0xc75/0xec0 [ 31.724766] vma_prepare+0xc54/0x11a0 [ 31.725251] __split_vma+0x5af/0x950 [ 31.725731] ? __pfx___split_vma+0x10/0x10 [ 31.726263] ? find_held_lock+0x2c/0x110 [ 31.726791] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.727370] ? lock_is_held_type+0x9f/0x120 [ 31.727916] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.728524] ? mtree_range_walk+0x632/0x900 [ 31.729083] ? mas_walk+0x5c7/0x7c0 [ 31.729562] do_vmi_munmap+0x1f1/0x2b0 [ 31.730059] mmap_region+0x1f9/0x2660 [ 31.730543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.731052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.731780] ? __pfx_lock_acquire+0x10/0x10 [ 31.732316] ? __pfx_mmap_region+0x10/0x10 [ 31.732849] ? security_mmap_addr+0x7d/0xa0 [ 31.733380] ? get_unmapped_area+0x1f5/0x3f0 [ 31.733933] do_mmap+0x854/0xf00 [ 31.734380] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.734876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.735455] ksys_mmap_pgoff+0x3af/0x500 [ 31.736065] do_syscall_64+0x3f/0x90 [ 31.736544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.737193] RIP: 0033:0x7f8720870d82 [ 31.737669] 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 [ 31.739838] RSP: 002b:00007ffc4826a5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.740755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8720870d82 [ 31.741610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f871fcaa000 [ 31.742467] RBP: 00007f871fcaa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.743356] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3067edb20 [ 31.744206] R13: 00007ffc4826a5e0 R14: 00007ffc4826a610 R15: 00007ffc4826a970 [ 31.745081] [ 31.745374] [ 31.745588] Allocated by task 212: [ 31.746016] kasan_save_stack+0x22/0x50 [ 31.746539] kasan_set_track+0x25/0x30 [ 31.747038] __kasan_slab_alloc+0x59/0x70 [ 31.747572] kmem_cache_alloc+0x16b/0x370 [ 31.748102] vm_area_dup+0x20/0x160 [ 31.748554] __split_vma+0x170/0x950 [ 31.749024] split_vma+0xc6/0x110 [ 31.749464] mprotect_fixup+0x8d2/0xb30 [ 31.749984] do_mprotect_pkey+0x87e/0xd40 [ 31.750500] __x64_sys_mprotect+0x78/0xc0 [ 31.751028] do_syscall_64+0x3f/0x90 [ 31.751512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.752153] [ 31.752364] Freed by task 212: [ 31.752759] kasan_save_stack+0x22/0x50 [ 31.753276] kasan_set_track+0x25/0x30 [ 31.753782] kasan_save_free_info+0x2b/0x50 [ 31.754330] __kasan_slab_free+0x10a/0x190 [ 31.754868] kmem_cache_free+0x10d/0x4d0 [ 31.755408] rcu_core+0x8c8/0x2860 [ 31.755852] __do_softirq+0x1b7/0x7d4 [ 31.756349] [ 31.756571] Last potentially related work creation: [ 31.757148] kasan_save_stack+0x22/0x50 [ 31.757649] __kasan_record_aux_stack+0x8e/0xa0 [ 31.758223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.758868] remove_vma+0x139/0x170 [ 31.759337] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.759911] do_vmi_munmap+0x1f1/0x2b0 [ 31.760396] __vm_munmap+0x138/0x3a0 [ 31.760866] __x64_sys_munmap+0x59/0x80 [ 31.761365] do_syscall_64+0x3f/0x90 [ 31.761841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.762489] [ 31.762709] Second to last potentially related work creation: [ 31.763399] kasan_save_stack+0x22/0x50 [ 31.763909] __kasan_record_aux_stack+0x8e/0xa0 [ 31.764499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.765154] remove_vma+0x139/0x170 [ 31.765608] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.766168] do_vmi_munmap+0x1f1/0x2b0 [ 31.766659] mmap_region+0x1f9/0x2660 [ 31.767134] do_mmap+0x854/0xf00 [ 31.767583] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.768073] ksys_mmap_pgoff+0x7d/0x500 [ 31.768562] do_syscall_64+0x3f/0x90 [ 31.769040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.769683] [ 31.769901] The buggy address belongs to the object at ffff88800e11be80 [ 31.769901] which belongs to the cache vm_area_struct of size 168 [ 31.771377] The buggy address is located 88 bytes inside of [ 31.771377] freed 168-byte region [ffff88800e11be80, ffff88800e11bf28) [ 31.772783] [ 31.772996] The buggy address belongs to the physical page: [ 31.773659] page:000000007d16ca38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe11b [ 31.774748] memcg:ffff88800da8fc01 [ 31.775177] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.775823] page_type: 0xffffffff() [ 31.776276] raw: 0100000000000200 ffff8880087a0c80 ffffea000034eec0 dead000000000002 [ 31.777200] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da8fc01 [ 31.778118] page dumped because: kasan: bad access detected [ 31.778786] [ 31.779007] Memory state around the buggy address: [ 31.779604] ffff88800e11bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.780469] ffff88800e11be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.781371] >ffff88800e11be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.782233] ^ [ 31.782970] ffff88800e11bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.783834] ffff88800e11bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.784693] ================================================================== [ 31.785825] Disabling lock debugging due to kernel taint [ 34.387668] BUG: Bad rss-counter state mm:00000000d7ddf28a type:MM_FILEPAGES val:33 [ 34.388670] BUG: Bad rss-counter state mm:00000000d7ddf28a type:MM_ANONPAGES val:22 [ 34.868410] BUG: Bad rss-counter state mm:00000000fb4a5b90 type:MM_FILEPAGES val:33 [ 34.869344] BUG: Bad rss-counter state mm:00000000fb4a5b90 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40499' (ECDSA) to the list of known hosts. 2023/06/21 06:54:53 fuzzer started 2023/06/21 06:54:54 dialing manager at localhost:36067 2023/06/21 06:54:54 checking machine... 2023/06/21 06:54:54 checking revisions... [ 35.588758] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:54:54 testing simple program... [ 35.643472] cgroup: Unknown subsys name 'net' [ 35.688004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:54:53 Registers: info registers vcpu 0 RAX=00008c85f0ba12b5 RBX=5ef21f7e38d44374 RCX=000000000000acf8 RDX=000000000000881c RSI=0000000000000000 RDI=000055fbb99da890 RBP=000000000000002b RSP=00007ffc6fec0280 R8 =00007ffc6fec0330 R9 =00007ffc6fec0338 R10=00007fda72166a34 R11=000000000000f290 R12=00007ffc6fec0850 R13=5ef21f7e38d44374 R14=000055fbb99da890 R15=00007ffc6fec0330 RIP=00007fda720f5168 RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fda71571900 00000000 00000000 GS =0000 0000000000000000 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=00007fda7097a158 CR3=000000000d860000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e31bf875ee5f1cad00000000000ae988 XMM05=3c9e7076cafcdecb00000000001346c8 XMM06=806171799158d9670000000000133768 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000000001e0 RCX=0000000000000000 RDX=ffff88800bbb0c00 RSI=0000000000008000 RDI=ffff88800d6bd180 RBP=0000000000008000 RSP=ffff888016bcfad0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800d6bd180 R13=ffff88800bbb0c00 R14=0000000000000000 R15=ffff888016bcfdf0 RIP=ffffffff8186b892 RFL=00000293 [--S-A-C] 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 00007f389c30c900 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=00007f389c8c40b0 CR3=000000000cb88000 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=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