syzkaller login: [ 44.050077] BUG: Bad rss-counter state mm:000000004aa5185b type:MM_FILEPAGES val:33 [ 44.052166] BUG: Bad rss-counter state mm:000000004aa5185b type:MM_ANONPAGES val:22 [ 44.184642] ================================================================== [ 44.185962] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.187350] Read of size 8 at addr ffff88801a17d310 by task sshd/220 [ 44.188280] [ 44.188541] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.189610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.190792] Call Trace: [ 44.191177] [ 44.191518] dump_stack_lvl+0x91/0xf0 [ 44.192110] print_report+0xcc/0x620 [ 44.192691] ? __virt_addr_valid+0x102/0x340 [ 44.193365] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.194220] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.195183] kasan_report+0xbe/0xf0 [ 44.195941] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.196969] vma_interval_tree_remove+0xc75/0xec0 [ 44.197784] vma_prepare+0xc54/0x11a0 [ 44.198376] __split_vma+0x5af/0x950 [ 44.198952] ? __pfx___split_vma+0x10/0x10 [ 44.199592] ? find_held_lock+0x2c/0x110 [ 44.200139] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.200702] ? lock_is_held_type+0x9f/0x120 [ 44.201259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.201872] ? mtree_range_walk+0x632/0x900 [ 44.202424] ? mas_walk+0x5c7/0x7c0 [ 44.202913] do_vmi_munmap+0x1f1/0x2b0 [ 44.203407] mmap_region+0x1f9/0x2660 [ 44.203891] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.204408] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.205139] ? __pfx_lock_acquire+0x10/0x10 [ 44.205676] ? __pfx_mmap_region+0x10/0x10 [ 44.206211] ? security_mmap_addr+0x7d/0xa0 [ 44.206751] ? get_unmapped_area+0x1f5/0x3f0 [ 44.207315] do_mmap+0x854/0xf00 [ 44.207764] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.208262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.208860] ksys_mmap_pgoff+0x3af/0x500 [ 44.209385] do_syscall_64+0x3f/0x90 [ 44.209888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.210555] RIP: 0033:0x7f1fc1e42d82 [ 44.211023] 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 [ 44.213246] RSP: 002b:00007fffeed644c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.214378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fc1e42d82 [ 44.215454] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1fc127c000 [ 44.216531] RBP: 00007f1fc127c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.217636] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562857183f70 [ 44.218722] R13: 00007fffeed644e0 R14: 00007fffeed64510 R15: 00007fffeed64870 [ 44.219812] [ 44.220179] [ 44.220443] Allocated by task 213: [ 44.221002] kasan_save_stack+0x22/0x50 [ 44.221634] kasan_set_track+0x25/0x30 [ 44.222256] __kasan_slab_alloc+0x59/0x70 [ 44.222920] kmem_cache_alloc+0x16b/0x370 [ 44.223584] vm_area_dup+0x20/0x160 [ 44.224160] __split_vma+0x170/0x950 [ 44.224740] split_vma+0xc6/0x110 [ 44.225309] mprotect_fixup+0x8d2/0xb30 [ 44.225942] do_mprotect_pkey+0x87e/0xd40 [ 44.226606] __x64_sys_mprotect+0x78/0xc0 [ 44.227268] do_syscall_64+0x3f/0x90 [ 44.227862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.228734] [ 44.229028] Freed by task 213: [ 44.229535] kasan_save_stack+0x22/0x50 [ 44.230176] kasan_set_track+0x25/0x30 [ 44.230802] kasan_save_free_info+0x2b/0x50 [ 44.231487] __kasan_slab_free+0x10a/0x190 [ 44.232172] kmem_cache_free+0x10d/0x4d0 [ 44.232826] rcu_core+0x8c8/0x2860 [ 44.233388] __do_softirq+0x1b7/0x7d4 [ 44.233990] [ 44.234260] Last potentially related work creation: [ 44.235011] kasan_save_stack+0x22/0x50 [ 44.235659] __kasan_record_aux_stack+0x8e/0xa0 [ 44.236409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.237256] remove_vma+0x139/0x170 [ 44.237837] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.238558] do_vmi_munmap+0x1f1/0x2b0 [ 44.239184] __vm_munmap+0x138/0x3a0 [ 44.239737] __x64_sys_munmap+0x59/0x80 [ 44.240337] do_syscall_64+0x3f/0x90 [ 44.240961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.241790] [ 44.242064] The buggy address belongs to the object at ffff88801a17d2b8 [ 44.242064] which belongs to the cache vm_area_struct of size 168 [ 44.244025] The buggy address is located 88 bytes inside of [ 44.244025] freed 168-byte region [ffff88801a17d2b8, ffff88801a17d360) [ 44.245733] [ 44.245975] The buggy address belongs to the physical page: [ 44.246718] page:00000000df0d0e4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a17d [ 44.247940] memcg:ffff888016072f01 [ 44.248414] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.249147] page_type: 0xffffffff() [ 44.249652] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.250680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016072f01 [ 44.251695] page dumped because: kasan: bad access detected [ 44.252432] [ 44.252670] Memory state around the buggy address: [ 44.253335] ffff88801a17d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 44.254292] ffff88801a17d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.255294] >ffff88801a17d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.256296] ^ [ 44.256856] ffff88801a17d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.257868] ffff88801a17d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.258871] ================================================================== [ 44.260092] Disabling lock debugging due to kernel taint [ 46.978065] BUG: Bad rss-counter state mm:00000000ebff9815 type:MM_FILEPAGES val:33 [ 46.979710] BUG: Bad rss-counter state mm:00000000ebff9815 type:MM_ANONPAGES val:22 [ 47.452628] BUG: Bad rss-counter state mm:000000005f9efd4b type:MM_FILEPAGES val:33 [ 47.454556] BUG: Bad rss-counter state mm:000000005f9efd4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37217' (ECDSA) to the list of known hosts. 2023/06/20 04:26:26 fuzzer started 2023/06/20 04:26:26 dialing manager at localhost:44161 2023/06/20 04:26:26 checking machine... 2023/06/20 04:26:26 checking revisions... [ 48.218147] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:26:26 testing simple program... [ 48.266777] cgroup: Unknown subsys name 'net' [ 48.308711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:26:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000008 RSI=ffff888019deff48 RDI=ffff888019def7a0 RBP=ffff888019def7f8 RSP=ffff888019def728 R8 =0000000000000001 R9 =ffff888019def7e0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888019def800 R13=ffff888019def7e8 R14=ffff888019deff48 R15=ffff888019def7a0 RIP=ffffffff811303fa RFL=00000287 [--S--PC] 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 00007fb54c3b2900 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=00007ffe1ca8a000 CR3=000000000e928000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f3ffea4dca0 CR3=000000000f530000 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=b28fb4b34028d490a94b88e6a95f4eff XMM02=ec2efd57dc4c00df000000000011da90 XMM03=45e065927327f769000000000011db60 XMM04=98adbb3fac63949300000000000ae988 XMM05=59d5b690e0af863b0000000000134638 XMM06=cf143123f06887710000000000132ee8 XMM07=e042d86d42eb936e0000000000124778 XMM08=45e065927327f769000000000011db60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000