syzkaller login: [ 33.935174] BUG: Bad rss-counter state mm:000000002dd75bc0 type:MM_FILEPAGES val:33 [ 33.936407] BUG: Bad rss-counter state mm:000000002dd75bc0 type:MM_ANONPAGES val:22 [ 33.974855] ================================================================== [ 33.975811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.976799] Read of size 8 at addr ffff88800fd17df0 by task sshd/220 [ 33.977603] [ 33.977819] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.978696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.979723] Call Trace: [ 33.980042] [ 33.980324] dump_stack_lvl+0x91/0xf0 [ 33.980815] print_report+0xcc/0x620 [ 33.981301] ? __virt_addr_valid+0x102/0x340 [ 33.981863] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.982503] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.983142] kasan_report+0xbe/0xf0 [ 33.983625] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.984252] vma_interval_tree_remove+0xc75/0xec0 [ 33.984852] vma_prepare+0xc54/0x11a0 [ 33.985325] __split_vma+0x5af/0x950 [ 33.985799] ? __pfx___split_vma+0x10/0x10 [ 33.986339] ? find_held_lock+0x2c/0x110 [ 33.986861] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.987421] ? lock_is_held_type+0x9f/0x120 [ 33.987967] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.988582] ? mtree_range_walk+0x632/0x900 [ 33.989126] ? mas_walk+0x5c7/0x7c0 [ 33.989598] do_vmi_munmap+0x1f1/0x2b0 [ 33.990088] mmap_region+0x1f9/0x2660 [ 33.990586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.991101] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.991812] ? __pfx_lock_acquire+0x10/0x10 [ 33.992338] ? __pfx_mmap_region+0x10/0x10 [ 33.992872] ? security_mmap_addr+0x7d/0xa0 [ 33.993410] ? get_unmapped_area+0x1f5/0x3f0 [ 33.993969] do_mmap+0x854/0xf00 [ 33.994425] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.994919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.995482] ksys_mmap_pgoff+0x3af/0x500 [ 33.995986] do_syscall_64+0x3f/0x90 [ 33.996460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.997099] RIP: 0033:0x7fe1cb556d82 [ 33.997557] 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 [ 33.999680] RSP: 002b:00007ffdf8ccbe28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.000618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1cb556d82 [ 34.001489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1ca990000 [ 34.002377] RBP: 00007fe1ca990000 R08: 0000000000000009 R09: 0000000000001000 [ 34.003258] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cb9d8cb20 [ 34.004134] R13: 00007ffdf8ccbe40 R14: 00007ffdf8ccbe70 R15: 00007ffdf8ccc1d0 [ 34.005016] [ 34.005325] [ 34.005551] Allocated by task 213: [ 34.005990] kasan_save_stack+0x22/0x50 [ 34.006528] kasan_set_track+0x25/0x30 [ 34.007041] __kasan_slab_alloc+0x59/0x70 [ 34.007589] kmem_cache_alloc+0x16b/0x370 [ 34.008118] vm_area_dup+0x20/0x160 [ 34.008594] __split_vma+0x170/0x950 [ 34.009081] split_vma+0xc6/0x110 [ 34.009542] mprotect_fixup+0x8d2/0xb30 [ 34.010058] do_mprotect_pkey+0x87e/0xd40 [ 34.010610] __x64_sys_mprotect+0x78/0xc0 [ 34.011145] do_syscall_64+0x3f/0x90 [ 34.011642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.012298] [ 34.012523] Freed by task 213: [ 34.012929] kasan_save_stack+0x22/0x50 [ 34.013454] kasan_set_track+0x25/0x30 [ 34.013976] kasan_save_free_info+0x2b/0x50 [ 34.014544] __kasan_slab_free+0x10a/0x190 [ 34.015087] kmem_cache_free+0x10d/0x4d0 [ 34.015608] rcu_core+0x8c8/0x2860 [ 34.016065] __do_softirq+0x1b7/0x7d4 [ 34.016565] [ 34.016784] Last potentially related work creation: [ 34.017386] kasan_save_stack+0x22/0x50 [ 34.017908] __kasan_record_aux_stack+0x8e/0xa0 [ 34.018494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.019160] remove_vma+0x139/0x170 [ 34.019635] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.020221] do_vmi_munmap+0x1f1/0x2b0 [ 34.020721] __vm_munmap+0x138/0x3a0 [ 34.021204] __x64_sys_munmap+0x59/0x80 [ 34.021717] do_syscall_64+0x3f/0x90 [ 34.022201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.022887] [ 34.023106] The buggy address belongs to the object at ffff88800fd17d98 [ 34.023106] which belongs to the cache vm_area_struct of size 168 [ 34.024614] The buggy address is located 88 bytes inside of [ 34.024614] freed 168-byte region [ffff88800fd17d98, ffff88800fd17e40) [ 34.026073] [ 34.026304] The buggy address belongs to the physical page: [ 34.026992] page:0000000022a75451 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd17 [ 34.028119] memcg:ffff88800e30ce01 [ 34.028559] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.029228] page_type: 0xffffffff() [ 34.029694] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.030657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e30ce01 [ 34.031605] page dumped because: kasan: bad access detected [ 34.032287] [ 34.032512] Memory state around the buggy address: [ 34.033112] ffff88800fd17c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.034001] ffff88800fd17d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.034902] >ffff88800fd17d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.035790] ^ [ 34.036623] ffff88800fd17e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.037504] ffff88800fd17e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.038394] ================================================================== [ 34.039509] Disabling lock debugging due to kernel taint [ 35.876240] BUG: Bad rss-counter state mm:00000000fdea24d6 type:MM_FILEPAGES val:33 [ 35.877247] BUG: Bad rss-counter state mm:00000000fdea24d6 type:MM_ANONPAGES val:22 [ 36.344019] BUG: Bad rss-counter state mm:00000000d5c80078 type:MM_FILEPAGES val:33 [ 36.345010] BUG: Bad rss-counter state mm:00000000d5c80078 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47049' (ECDSA) to the list of known hosts. 2023/06/20 00:00:44 fuzzer started 2023/06/20 00:00:44 dialing manager at localhost:44161 2023/06/20 00:00:44 checking machine... 2023/06/20 00:00:44 checking revisions... [ 37.090253] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:00:45 testing simple program... [ 37.139403] cgroup: Unknown subsys name 'net' [ 37.180917] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:00:39 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83c632d1 RDX=ffff88800f1e0000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888017cb76a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000091 R11=00000ab900000ab9 R12=0000000000000000 R13=0000000000000091 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c07eb RFL=00000283 [--S---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 00007fbc5a5fd900 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=00007fbc5abb4618 CR3=000000001c980000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8118ddc3 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff8118ddc3 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800d136540 RIP=ffffffff813ad420 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 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=00007f1771c5b920 CR3=000000000e43e000 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=2034343a30303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a30303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000