syzkaller login: [ 31.767168] BUG: Bad rss-counter state mm:00000000ce2b9062 type:MM_FILEPAGES val:33 [ 31.768407] BUG: Bad rss-counter state mm:00000000ce2b9062 type:MM_ANONPAGES val:22 [ 31.806584] ================================================================== [ 31.807585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.808529] Read of size 8 at addr ffff88800f05c968 by task sshd/220 [ 31.809297] [ 31.809520] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.810382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.811364] Call Trace: [ 31.811685] [ 31.811974] dump_stack_lvl+0x91/0xf0 [ 31.812495] print_report+0xcc/0x620 [ 31.812982] ? __virt_addr_valid+0x102/0x340 [ 31.813542] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.814163] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.814784] kasan_report+0xbe/0xf0 [ 31.815265] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.815891] vma_interval_tree_remove+0xc75/0xec0 [ 31.816514] vma_prepare+0xc54/0x11a0 [ 31.817001] __split_vma+0x5af/0x950 [ 31.817480] ? __pfx___split_vma+0x10/0x10 [ 31.818016] ? find_held_lock+0x2c/0x110 [ 31.818544] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.819118] ? lock_is_held_type+0x9f/0x120 [ 31.819665] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.820281] ? mtree_range_walk+0x632/0x900 [ 31.820837] ? mas_walk+0x5c7/0x7c0 [ 31.821316] do_vmi_munmap+0x1f1/0x2b0 [ 31.821813] mmap_region+0x1f9/0x2660 [ 31.822296] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.822810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.823537] ? __pfx_lock_acquire+0x10/0x10 [ 31.824088] ? __pfx_mmap_region+0x10/0x10 [ 31.824620] ? security_mmap_addr+0x7d/0xa0 [ 31.825157] ? get_unmapped_area+0x1f5/0x3f0 [ 31.825718] do_mmap+0x854/0xf00 [ 31.826163] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.826661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.827232] ksys_mmap_pgoff+0x3af/0x500 [ 31.827738] do_syscall_64+0x3f/0x90 [ 31.828227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.828883] RIP: 0033:0x7f8d10326d82 [ 31.829344] 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 [ 31.831493] RSP: 002b:00007fffa59a8d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.832406] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d10326d82 [ 31.833247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d0f760000 [ 31.834224] RBP: 00007f8d0f760000 R08: 0000000000000009 R09: 0000000000001000 [ 31.835088] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cab644f70 [ 31.835944] R13: 00007fffa59a8da0 R14: 00007fffa59a8dd0 R15: 00007fffa59a9130 [ 31.836843] [ 31.837143] [ 31.837360] Allocated by task 213: [ 31.837803] kasan_save_stack+0x22/0x50 [ 31.838310] kasan_set_track+0x25/0x30 [ 31.838811] __kasan_slab_alloc+0x59/0x70 [ 31.839350] kmem_cache_alloc+0x16b/0x370 [ 31.839876] vm_area_dup+0x20/0x160 [ 31.840353] __split_vma+0x170/0x950 [ 31.840825] split_vma+0xc6/0x110 [ 31.841266] mprotect_fixup+0x8d2/0xb30 [ 31.841768] do_mprotect_pkey+0x87e/0xd40 [ 31.842300] __x64_sys_mprotect+0x78/0xc0 [ 31.842829] do_syscall_64+0x3f/0x90 [ 31.843303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.843956] [ 31.844194] Freed by task 213: [ 31.844590] kasan_save_stack+0x22/0x50 [ 31.845107] kasan_set_track+0x25/0x30 [ 31.845601] kasan_save_free_info+0x2b/0x50 [ 31.846139] __kasan_slab_free+0x10a/0x190 [ 31.846674] kmem_cache_free+0x10d/0x4d0 [ 31.847188] rcu_core+0x8c8/0x2860 [ 31.847632] __do_softirq+0x1b7/0x7d4 [ 31.848117] [ 31.848332] Last potentially related work creation: [ 31.848923] kasan_save_stack+0x22/0x50 [ 31.849427] __kasan_record_aux_stack+0x8e/0xa0 [ 31.850005] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.850676] remove_vma+0x139/0x170 [ 31.851140] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.851705] do_vmi_munmap+0x1f1/0x2b0 [ 31.852212] __vm_munmap+0x138/0x3a0 [ 31.852680] __x64_sys_munmap+0x59/0x80 [ 31.853181] do_syscall_64+0x3f/0x90 [ 31.853661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854317] [ 31.854537] The buggy address belongs to the object at ffff88800f05c910 [ 31.854537] which belongs to the cache vm_area_struct of size 168 [ 31.856108] The buggy address is located 88 bytes inside of [ 31.856108] freed 168-byte region [ffff88800f05c910, ffff88800f05c9b8) [ 31.857847] [ 31.858109] The buggy address belongs to the physical page: [ 31.858939] page:00000000ed74b914 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf05c [ 31.860309] memcg:ffff88800e9e1a01 [ 31.860838] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.861644] page_type: 0xffffffff() [ 31.862208] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.863358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9e1a01 [ 31.864506] page dumped because: kasan: bad access detected [ 31.865295] [ 31.865514] Memory state around the buggy address: [ 31.866103] ffff88800f05c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.866972] ffff88800f05c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.867827] >ffff88800f05c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.868695] ^ [ 31.869484] ffff88800f05c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.870338] ffff88800f05ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.871187] ================================================================== [ 31.872272] Disabling lock debugging due to kernel taint [ 33.784898] BUG: Bad rss-counter state mm:000000000616384c type:MM_FILEPAGES val:33 [ 33.786068] BUG: Bad rss-counter state mm:000000000616384c type:MM_ANONPAGES val:22 [ 34.335867] BUG: Bad rss-counter state mm:0000000012b7a288 type:MM_FILEPAGES val:33 [ 34.337050] BUG: Bad rss-counter state mm:0000000012b7a288 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27407' (ECDSA) to the list of known hosts. 2023/06/21 01:55:34 fuzzer started 2023/06/21 01:55:34 dialing manager at localhost:36067 2023/06/21 01:55:34 checking machine... 2023/06/21 01:55:34 checking revisions... [ 34.974676] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:55:34 testing simple program... [ 35.012611] cgroup: Unknown subsys name 'net' [ 35.056748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:55:34 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=00007fff164ac358 CR3=000000000e9a4000 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=2034333a35353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a35353a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007fc01695d163 RSP=ffff8880166ff260 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007fc01695d163 R13=0000000000000000 R14=ffff88800ff951c0 R15=00000000000928c0 RIP=ffffffff814c8496 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 00007fc01646a900 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=00007ffed52de000 CR3=000000000fc82000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000