syzkaller login: [ 32.300798] BUG: Bad rss-counter state mm:000000004ad88345 type:MM_FILEPAGES val:33 [ 32.302212] BUG: Bad rss-counter state mm:000000004ad88345 type:MM_ANONPAGES val:22 [ 32.454087] ================================================================== [ 32.455021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.455945] Read of size 8 at addr ffff8880094bf140 by task sshd/220 [ 32.456713] [ 32.456931] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.457955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.458942] Call Trace: [ 32.459274] [ 32.459583] dump_stack_lvl+0x91/0xf0 [ 32.460084] print_report+0xcc/0x620 [ 32.460571] ? __virt_addr_valid+0x102/0x340 [ 32.461127] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.461744] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.462362] kasan_report+0xbe/0xf0 [ 32.462836] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.463459] vma_interval_tree_remove+0xc75/0xec0 [ 32.464058] vma_prepare+0xc54/0x11a0 [ 32.464529] __split_vma+0x5af/0x950 [ 32.465005] ? __pfx___split_vma+0x10/0x10 [ 32.465529] ? find_held_lock+0x2c/0x110 [ 32.466043] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.466601] ? lock_is_held_type+0x9f/0x120 [ 32.467140] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.467867] ? mtree_range_walk+0x632/0x900 [ 32.468541] ? mas_walk+0x5c7/0x7c0 [ 32.469142] do_vmi_munmap+0x1f1/0x2b0 [ 32.469738] mmap_region+0x1f9/0x2660 [ 32.470319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.470930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.471797] ? __pfx_lock_acquire+0x10/0x10 [ 32.472444] ? __pfx_mmap_region+0x10/0x10 [ 32.473095] ? security_mmap_addr+0x7d/0xa0 [ 32.473732] ? get_unmapped_area+0x1f5/0x3f0 [ 32.474392] do_mmap+0x854/0xf00 [ 32.474917] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.475511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.476190] ksys_mmap_pgoff+0x3af/0x500 [ 32.476836] do_syscall_64+0x3f/0x90 [ 32.477412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.478223] RIP: 0033:0x7f6f5ab22d82 [ 32.478793] 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 [ 32.481395] RSP: 002b:00007ffc92555058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.482491] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f5ab22d82 [ 32.483613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f59f5c000 [ 32.484591] RBP: 00007f6f59f5c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.485580] R10: 0000000000000812 R11: 0000000000000206 R12: 000056426b049ec0 [ 32.486558] R13: 00007ffc92555070 R14: 00007ffc925550a0 R15: 00007ffc92555400 [ 32.487544] [ 32.487881] [ 32.488130] Allocated by task 213: [ 32.488634] kasan_save_stack+0x22/0x50 [ 32.489233] kasan_set_track+0x25/0x30 [ 32.489803] __kasan_slab_alloc+0x59/0x70 [ 32.490414] kmem_cache_alloc+0x16b/0x370 [ 32.491010] vm_area_dup+0x20/0x160 [ 32.491535] __split_vma+0x170/0x950 [ 32.492075] split_vma+0xc6/0x110 [ 32.492581] mprotect_fixup+0x8d2/0xb30 [ 32.493167] do_mprotect_pkey+0x87e/0xd40 [ 32.493773] __x64_sys_mprotect+0x78/0xc0 [ 32.494372] do_syscall_64+0x3f/0x90 [ 32.494920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.495661] [ 32.495910] Freed by task 213: [ 32.496366] kasan_save_stack+0x22/0x50 [ 32.496955] kasan_set_track+0x25/0x30 [ 32.497536] kasan_save_free_info+0x2b/0x50 [ 32.498147] __kasan_slab_free+0x10a/0x190 [ 32.498760] kmem_cache_free+0x10d/0x4d0 [ 32.499338] rcu_core+0x8c8/0x2860 [ 32.499843] __do_softirq+0x1b7/0x7d4 [ 32.500389] [ 32.500635] Last potentially related work creation: [ 32.501327] kasan_save_stack+0x22/0x50 [ 32.501903] __kasan_record_aux_stack+0x8e/0xa0 [ 32.502560] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.503298] remove_vma+0x139/0x170 [ 32.503817] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.504455] do_vmi_munmap+0x1f1/0x2b0 [ 32.505017] __vm_munmap+0x138/0x3a0 [ 32.505553] __x64_sys_munmap+0x59/0x80 [ 32.506122] do_syscall_64+0x3f/0x90 [ 32.506670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.507407] [ 32.507656] The buggy address belongs to the object at ffff8880094bf0e8 [ 32.507656] which belongs to the cache vm_area_struct of size 168 [ 32.509339] The buggy address is located 88 bytes inside of [ 32.509339] freed 168-byte region [ffff8880094bf0e8, ffff8880094bf190) [ 32.510947] [ 32.511194] The buggy address belongs to the physical page: [ 32.511952] page:0000000090d32dc9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94bf [ 32.513211] memcg:ffff88800ee73901 [ 32.513699] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.514489] page_type: 0xffffffff() [ 32.515003] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b74c0 dead000000000005 [ 32.516055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee73901 [ 32.517084] page dumped because: kasan: bad access detected [ 32.517830] [ 32.518072] Memory state around the buggy address: [ 32.518734] ffff8880094bf000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.519706] ffff8880094bf080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.520679] >ffff8880094bf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.521645] ^ [ 32.522375] ffff8880094bf180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.523345] ffff8880094bf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.524319] ================================================================== [ 32.525683] Disabling lock debugging due to kernel taint [ 34.706391] BUG: Bad rss-counter state mm:0000000024363721 type:MM_FILEPAGES val:33 [ 34.708195] BUG: Bad rss-counter state mm:0000000024363721 type:MM_ANONPAGES val:22 [ 35.290030] BUG: Bad rss-counter state mm:0000000007bb909a type:MM_FILEPAGES val:33 [ 35.291408] BUG: Bad rss-counter state mm:0000000007bb909a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27157' (ECDSA) to the list of known hosts. 2023/06/21 03:34:11 fuzzer started 2023/06/21 03:34:12 dialing manager at localhost:36067 2023/06/21 03:34:12 checking machine... 2023/06/21 03:34:12 checking revisions... [ 36.001383] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:34:12 testing simple program... [ 36.046829] cgroup: Unknown subsys name 'net' [ 36.097938] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:34:11 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff8880195a1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888017db74a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800dacef00 RIP=ffffffff814c086b 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 00007f8fd035b700 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=00007f1ec0459e60 CR3=0000000018fd8000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031313a3433 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383035 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100328c0f7 RBX=ffff888019460788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880194607b8 RBP=ffff888010077bc0 RSP=ffff8880094afd28 R8 =0000000000000001 R9 =ffffed1001295f99 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888010077bc0 R14=ffffffff81ef10be R15=ffff888019fb5140 RIP=ffffffff818464ec RFL=00000046 [---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 00007f8f10bb2900 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=00007ffe1f139000 CR3=000000000e5c8000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000