syzkaller login: [ 31.765118] BUG: Bad rss-counter state mm:000000005f1a2c15 type:MM_FILEPAGES val:33 [ 31.766303] BUG: Bad rss-counter state mm:000000005f1a2c15 type:MM_ANONPAGES val:22 [ 31.804646] ================================================================== [ 31.805779] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.806896] Read of size 8 at addr ffff888019c6b880 by task sshd/219 [ 31.807765] [ 31.808011] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.809006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.810086] Call Trace: [ 31.810411] [ 31.810727] dump_stack_lvl+0x91/0xf0 [ 31.811350] print_report+0xcc/0x620 [ 31.811833] ? __virt_addr_valid+0x102/0x340 [ 31.812384] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.813029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.813644] kasan_report+0xbe/0xf0 [ 31.814124] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.814747] vma_interval_tree_remove+0xc75/0xec0 [ 31.815354] vma_prepare+0xc54/0x11a0 [ 31.815837] __split_vma+0x5af/0x950 [ 31.816314] ? __pfx___split_vma+0x10/0x10 [ 31.816841] ? find_held_lock+0x2c/0x110 [ 31.817383] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.817948] ? lock_is_held_type+0x9f/0x120 [ 31.818489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.819094] ? mtree_range_walk+0x632/0x900 [ 31.819656] ? mas_walk+0x5c7/0x7c0 [ 31.820131] do_vmi_munmap+0x1f1/0x2b0 [ 31.820628] mmap_region+0x1f9/0x2660 [ 31.821120] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.821633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.822349] ? __pfx_lock_acquire+0x10/0x10 [ 31.822881] ? __pfx_mmap_region+0x10/0x10 [ 31.823411] ? security_mmap_addr+0x7d/0xa0 [ 31.823942] ? get_unmapped_area+0x1f5/0x3f0 [ 31.824512] do_mmap+0x854/0xf00 [ 31.824980] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.825476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.826044] ksys_mmap_pgoff+0x3af/0x500 [ 31.826550] do_syscall_64+0x3f/0x90 [ 31.827031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.827675] RIP: 0033:0x7fc42730bd82 [ 31.828134] 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 [ 31.830268] RSP: 002b:00007ffce27ea0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.831175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc42730bd82 [ 31.832032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc426745000 [ 31.833038] RBP: 00007fc426745000 R08: 0000000000000009 R09: 0000000000001000 [ 31.833975] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8e34b5f70 [ 31.834817] R13: 00007ffce27ea100 R14: 00007ffce27ea130 R15: 00007ffce27ea490 [ 31.835689] [ 31.835979] [ 31.836194] Allocated by task 212: [ 31.836624] kasan_save_stack+0x22/0x50 [ 31.837132] kasan_set_track+0x25/0x30 [ 31.837628] __kasan_slab_alloc+0x59/0x70 [ 31.838149] kmem_cache_alloc+0x16b/0x370 [ 31.838671] vm_area_dup+0x20/0x160 [ 31.839137] __split_vma+0x170/0x950 [ 31.839600] split_vma+0xc6/0x110 [ 31.840035] mprotect_fixup+0x8d2/0xb30 [ 31.840534] do_mprotect_pkey+0x87e/0xd40 [ 31.841072] __x64_sys_mprotect+0x78/0xc0 [ 31.841593] do_syscall_64+0x3f/0x90 [ 31.842061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.842710] [ 31.842927] Freed by task 202: [ 31.843318] kasan_save_stack+0x22/0x50 [ 31.843821] kasan_set_track+0x25/0x30 [ 31.844315] kasan_save_free_info+0x2b/0x50 [ 31.844846] __kasan_slab_free+0x10a/0x190 [ 31.845388] kmem_cache_free+0x10d/0x4d0 [ 31.845898] rcu_core+0x8c8/0x2860 [ 31.846341] __do_softirq+0x1b7/0x7d4 [ 31.846815] [ 31.847029] Last potentially related work creation: [ 31.847611] kasan_save_stack+0x22/0x50 [ 31.848112] __kasan_record_aux_stack+0x8e/0xa0 [ 31.848684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.849338] remove_vma+0x139/0x170 [ 31.849795] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.850363] do_vmi_munmap+0x1f1/0x2b0 [ 31.850852] __vm_munmap+0x138/0x3a0 [ 31.851317] __x64_sys_munmap+0x59/0x80 [ 31.851810] do_syscall_64+0x3f/0x90 [ 31.852282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.852932] [ 31.853161] The buggy address belongs to the object at ffff888019c6b828 [ 31.853161] which belongs to the cache vm_area_struct of size 168 [ 31.854628] The buggy address is located 88 bytes inside of [ 31.854628] freed 168-byte region [ffff888019c6b828, ffff888019c6b8d0) [ 31.856019] [ 31.856234] The buggy address belongs to the physical page: [ 31.856889] page:00000000a350897b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c6b [ 31.857980] memcg:ffff88800bf16b01 [ 31.858414] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.859055] page_type: 0xffffffff() [ 31.859500] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.860410] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf16b01 [ 31.861324] page dumped because: kasan: bad access detected [ 31.861986] [ 31.862201] Memory state around the buggy address: [ 31.862778] ffff888019c6b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.863626] ffff888019c6b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.864473] >ffff888019c6b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.865340] ^ [ 31.865752] ffff888019c6b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.866614] ffff888019c6b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.867459] ================================================================== [ 31.868417] Disabling lock debugging due to kernel taint [ 34.058142] BUG: Bad rss-counter state mm:00000000ad7205c9 type:MM_FILEPAGES val:33 [ 34.059162] BUG: Bad rss-counter state mm:00000000ad7205c9 type:MM_ANONPAGES val:22 [ 34.554893] BUG: Bad rss-counter state mm:000000005fe58737 type:MM_FILEPAGES val:33 [ 34.555930] BUG: Bad rss-counter state mm:000000005fe58737 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54299' (ECDSA) to the list of known hosts. 2023/06/20 03:34:19 fuzzer started 2023/06/20 03:34:20 dialing manager at localhost:44161 2023/06/20 03:34:20 checking machine... 2023/06/20 03:34:20 checking revisions... [ 35.318869] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:34:20 testing simple program... [ 35.370204] cgroup: Unknown subsys name 'net' [ 35.422703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:34:19 Registers: info registers vcpu 0 RAX=000000000000000a RBX=00007f4da4003730 RCX=0000000000000001 RDX=00007f4dafc9e78c RSI=00007f4dafc9e790 RDI=00007f4da00046a0 RBP=00007f4da00046a0 RSP=00007f4dafc9e760 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000009 R11=0000000000000286 R12=0000000000000009 R13=00007f4da00046a0 R14=000055f528c10ec0 R15=0000000000000000 RIP=000055f528b835fc RFL=00000297 [--S-APC] 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 00007f4dafc9f700 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=00007ffebb8229d8 CR3=0000000016686000 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=2039313a34333a3330203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a323333303420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a34333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f6d8e016f18 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f6d8e016f18 RSP=ffff888019dc7a40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888019dc7b58 R13=0000000000000000 R14=ffffffff85652988 R15=ffff88800cfcd130 RIP=ffffffff814c8520 RFL=00000286 [--S--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 00007f6d8db2f900 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=00007f6d8e0e70b0 CR3=000000000e6e6000 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