syzkaller login: [ 41.288330] BUG: Bad rss-counter state mm:0000000058b3e144 type:MM_FILEPAGES val:33 [ 41.290014] BUG: Bad rss-counter state mm:0000000058b3e144 type:MM_ANONPAGES val:22 [ 41.451004] ================================================================== [ 41.452089] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.453203] Read of size 8 at addr ffff88800dfa1228 by task sshd/219 [ 41.454280] [ 41.454557] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.455576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.456685] Call Trace: [ 41.457006] [ 41.457300] dump_stack_lvl+0x91/0xf0 [ 41.457791] print_report+0xcc/0x620 [ 41.458283] ? __virt_addr_valid+0x102/0x340 [ 41.458851] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.459483] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.460115] kasan_report+0xbe/0xf0 [ 41.460600] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.461224] vma_interval_tree_remove+0xc75/0xec0 [ 41.461826] vma_prepare+0xc54/0x11a0 [ 41.462313] __split_vma+0x5af/0x950 [ 41.462788] ? __pfx___split_vma+0x10/0x10 [ 41.463317] ? find_held_lock+0x2c/0x110 [ 41.463834] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.464412] ? lock_is_held_type+0x9f/0x120 [ 41.464951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.465562] ? mtree_range_walk+0x632/0x900 [ 41.466110] ? mas_walk+0x5c7/0x7c0 [ 41.466605] do_vmi_munmap+0x1f1/0x2b0 [ 41.467098] mmap_region+0x1f9/0x2660 [ 41.467582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.468094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.468807] ? __pfx_lock_acquire+0x10/0x10 [ 41.469351] ? __pfx_mmap_region+0x10/0x10 [ 41.469884] ? security_mmap_addr+0x7d/0xa0 [ 41.470439] ? get_unmapped_area+0x1f5/0x3f0 [ 41.470990] do_mmap+0x854/0xf00 [ 41.471428] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.471926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.472487] ksys_mmap_pgoff+0x3af/0x500 [ 41.472993] do_syscall_64+0x3f/0x90 [ 41.473476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.474120] RIP: 0033:0x7f5ed7b75d82 [ 41.474590] 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 [ 41.476739] RSP: 002b:00007ffd88014668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.477645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ed7b75d82 [ 41.478516] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ed6faf000 [ 41.479362] RBP: 00007f5ed6faf000 R08: 0000000000000009 R09: 0000000000001000 [ 41.480203] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608ac933ec0 [ 41.481048] R13: 00007ffd88014680 R14: 00007ffd880146b0 R15: 00007ffd88014a10 [ 41.481922] [ 41.482217] [ 41.482439] Allocated by task 212: [ 41.482870] kasan_save_stack+0x22/0x50 [ 41.483369] kasan_set_track+0x25/0x30 [ 41.483859] __kasan_slab_alloc+0x59/0x70 [ 41.484387] kmem_cache_alloc+0x16b/0x370 [ 41.484911] vm_area_dup+0x20/0x160 [ 41.485371] __split_vma+0x170/0x950 [ 41.485835] split_vma+0xc6/0x110 [ 41.486277] mprotect_fixup+0x8d2/0xb30 [ 41.486806] do_mprotect_pkey+0x87e/0xd40 [ 41.487325] __x64_sys_mprotect+0x78/0xc0 [ 41.487845] do_syscall_64+0x3f/0x90 [ 41.488315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.488952] [ 41.489167] Freed by task 212: [ 41.489560] kasan_save_stack+0x22/0x50 [ 41.490062] kasan_set_track+0x25/0x30 [ 41.490633] kasan_save_free_info+0x2b/0x50 [ 41.491165] __kasan_slab_free+0x10a/0x190 [ 41.491728] kmem_cache_free+0x10d/0x4d0 [ 41.492239] rcu_core+0x8c8/0x2860 [ 41.492686] __do_softirq+0x1b7/0x7d4 [ 41.493163] [ 41.493378] Last potentially related work creation: [ 41.493964] kasan_save_stack+0x22/0x50 [ 41.494488] __kasan_record_aux_stack+0x8e/0xa0 [ 41.495066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.495719] remove_vma+0x139/0x170 [ 41.496174] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.496734] do_vmi_munmap+0x1f1/0x2b0 [ 41.497224] __vm_munmap+0x138/0x3a0 [ 41.497692] __x64_sys_munmap+0x59/0x80 [ 41.498188] do_syscall_64+0x3f/0x90 [ 41.498683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.499328] [ 41.499544] Second to last potentially related work creation: [ 41.500227] kasan_save_stack+0x22/0x50 [ 41.500734] __kasan_record_aux_stack+0x8e/0xa0 [ 41.501315] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.501957] remove_vma+0x139/0x170 [ 41.502419] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.502978] do_vmi_munmap+0x1f1/0x2b0 [ 41.503463] mmap_region+0x1f9/0x2660 [ 41.503943] do_mmap+0x854/0xf00 [ 41.504377] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.504867] ksys_mmap_pgoff+0x3af/0x500 [ 41.505373] do_syscall_64+0x3f/0x90 [ 41.505846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.506513] [ 41.506728] The buggy address belongs to the object at ffff88800dfa11d0 [ 41.506728] which belongs to the cache vm_area_struct of size 168 [ 41.508203] The buggy address is located 88 bytes inside of [ 41.508203] freed 168-byte region [ffff88800dfa11d0, ffff88800dfa1278) [ 41.509615] [ 41.509832] The buggy address belongs to the physical page: [ 41.510499] page:000000007793fcb3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfa1 [ 41.511583] memcg:ffff88800dfd5401 [ 41.512011] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.512657] page_type: 0xffffffff() [ 41.513114] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 41.514033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfd5401 [ 41.514954] page dumped because: kasan: bad access detected [ 41.515617] [ 41.515835] Memory state around the buggy address: [ 41.516418] ffff88800dfa1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.517275] ffff88800dfa1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.518135] >ffff88800dfa1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.519009] ^ [ 41.519571] ffff88800dfa1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.520424] ffff88800dfa1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.521274] ================================================================== [ 41.522566] Disabling lock debugging due to kernel taint [ 43.470915] BUG: Bad rss-counter state mm:000000001f9af287 type:MM_FILEPAGES val:33 [ 43.471679] BUG: Bad rss-counter state mm:000000001f9af287 type:MM_ANONPAGES val:22 [ 43.915756] BUG: Bad rss-counter state mm:000000006d28e3ee type:MM_FILEPAGES val:33 [ 43.916763] BUG: Bad rss-counter state mm:000000006d28e3ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53373' (ECDSA) to the list of known hosts. 2023/06/20 08:36:16 fuzzer started 2023/06/20 08:36:17 dialing manager at localhost:44161 2023/06/20 08:36:17 checking machine... 2023/06/20 08:36:17 checking revisions... [ 44.721529] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:36:17 testing simple program... [ 44.771511] cgroup: Unknown subsys name 'net' [ 44.824561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:36:13 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff86053a2c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a2c RSP=ffff88800f357770 R8 =ffffffff864b9d50 R9 =ffff88800f357868 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007f511492e900 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=00007ffd40ae2000 CR3=000000000df06000 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=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 info registers vcpu 1 RAX=0000000000000004 RBX=ffff888008d751c0 RCX=ffff888008e28000 RDX=ffff88806cf09a98 RSI=ffff888008d751c0 RDI=ffff888008e27dc0 RBP=ffff88806cf09ab8 RSP=ffff88806cf099d0 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09a98 R13=ffff88806cf02000 R14=ffff888008e27dc8 R15=ffff88806cf09a98 RIP=ffffffff8108df9f 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=00007fa269e90ed0 CR3=000000000fefe000 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=2036313a36333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a36333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000