syzkaller login: [ 31.195208] BUG: Bad rss-counter state mm:00000000ee393f1e type:MM_FILEPAGES val:33 [ 31.196392] BUG: Bad rss-counter state mm:00000000ee393f1e type:MM_ANONPAGES val:22 [ 31.248896] ================================================================== [ 31.249803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.250753] Read of size 8 at addr ffff8880199f8a50 by task sshd/220 [ 31.251517] [ 31.251734] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.252757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.253738] Call Trace: [ 31.254063] [ 31.254345] dump_stack_lvl+0x91/0xf0 [ 31.254858] print_report+0xcc/0x620 [ 31.255346] ? __virt_addr_valid+0x102/0x340 [ 31.255902] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256527] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257150] kasan_report+0xbe/0xf0 [ 31.257629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258272] vma_interval_tree_remove+0xc75/0xec0 [ 31.258871] vma_prepare+0xc54/0x11a0 [ 31.259358] __split_vma+0x5af/0x950 [ 31.259830] ? __pfx___split_vma+0x10/0x10 [ 31.260363] ? find_held_lock+0x2c/0x110 [ 31.260889] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.261452] ? lock_is_held_type+0x9f/0x120 [ 31.261998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.262606] ? mtree_range_walk+0x632/0x900 [ 31.263164] ? mas_walk+0x5c7/0x7c0 [ 31.263643] do_vmi_munmap+0x1f1/0x2b0 [ 31.264139] mmap_region+0x1f9/0x2660 [ 31.264624] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.265133] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.265843] ? __pfx_lock_acquire+0x10/0x10 [ 31.266398] ? __pfx_mmap_region+0x10/0x10 [ 31.266922] ? security_mmap_addr+0x7d/0xa0 [ 31.267458] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268019] do_mmap+0x854/0xf00 [ 31.268471] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.268965] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.269525] ksys_mmap_pgoff+0x3af/0x500 [ 31.270040] do_syscall_64+0x3f/0x90 [ 31.270526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271181] RIP: 0033:0x7f45e4224d82 [ 31.271642] 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 [ 31.273773] RSP: 002b:00007ffd6d876cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.274690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45e4224d82 [ 31.275539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45e365e000 [ 31.276394] RBP: 00007f45e365e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.277246] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607d6a90f70 [ 31.278128] R13: 00007ffd6d876ce0 R14: 00007ffd6d876d10 R15: 00007ffd6d877070 [ 31.278997] [ 31.279290] [ 31.279506] Allocated by task 213: [ 31.279933] kasan_save_stack+0x22/0x50 [ 31.280449] kasan_set_track+0x25/0x30 [ 31.280937] __kasan_slab_alloc+0x59/0x70 [ 31.281459] kmem_cache_alloc+0x16b/0x370 [ 31.281981] vm_area_dup+0x20/0x160 [ 31.282438] __split_vma+0x170/0x950 [ 31.282907] split_vma+0xc6/0x110 [ 31.283355] mprotect_fixup+0x8d2/0xb30 [ 31.283850] do_mprotect_pkey+0x87e/0xd40 [ 31.284377] __x64_sys_mprotect+0x78/0xc0 [ 31.284897] do_syscall_64+0x3f/0x90 [ 31.285376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286033] [ 31.286252] Freed by task 213: [ 31.286648] kasan_save_stack+0x22/0x50 [ 31.287150] kasan_set_track+0x25/0x30 [ 31.287647] kasan_save_free_info+0x2b/0x50 [ 31.288181] __kasan_slab_free+0x10a/0x190 [ 31.288713] kmem_cache_free+0x10d/0x4d0 [ 31.289225] rcu_core+0x8c8/0x2860 [ 31.289731] __do_softirq+0x1b7/0x7d4 [ 31.290217] [ 31.290431] Last potentially related work creation: [ 31.291009] kasan_save_stack+0x22/0x50 [ 31.291512] __kasan_record_aux_stack+0x8e/0xa0 [ 31.292083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.292732] remove_vma+0x139/0x170 [ 31.293189] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.293749] do_vmi_munmap+0x1f1/0x2b0 [ 31.294244] __vm_munmap+0x138/0x3a0 [ 31.294713] __x64_sys_munmap+0x59/0x80 [ 31.295204] do_syscall_64+0x3f/0x90 [ 31.295680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296332] [ 31.296550] The buggy address belongs to the object at ffff8880199f89f8 [ 31.296550] which belongs to the cache vm_area_struct of size 168 [ 31.298042] The buggy address is located 88 bytes inside of [ 31.298042] freed 168-byte region [ffff8880199f89f8, ffff8880199f8aa0) [ 31.299459] [ 31.299676] The buggy address belongs to the physical page: [ 31.300337] page:0000000014c59026 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199f8 [ 31.301442] memcg:ffff88800eb87501 [ 31.301878] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.302530] page_type: 0xffffffff() [ 31.302990] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.303924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb87501 [ 31.304848] page dumped because: kasan: bad access detected [ 31.305509] [ 31.305729] Memory state around the buggy address: [ 31.306335] ffff8880199f8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.307195] ffff8880199f8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.308065] >ffff8880199f8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.308923] ^ [ 31.309633] ffff8880199f8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.310512] ffff8880199f8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.311382] ================================================================== [ 31.312322] Disabling lock debugging due to kernel taint [ 33.675157] BUG: Bad rss-counter state mm:0000000052a6c644 type:MM_FILEPAGES val:33 [ 33.676086] BUG: Bad rss-counter state mm:0000000052a6c644 type:MM_ANONPAGES val:22 [ 34.125558] BUG: Bad rss-counter state mm:000000003b9459ef type:MM_FILEPAGES val:33 [ 34.126510] BUG: Bad rss-counter state mm:000000003b9459ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43875' (ECDSA) to the list of known hosts. 2023/06/20 23:21:29 fuzzer started 2023/06/20 23:21:29 dialing manager at localhost:36067 2023/06/20 23:21:29 checking machine... 2023/06/20 23:21:29 checking revisions... [ 34.884940] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:21:29 testing simple program... [ 34.934839] cgroup: Unknown subsys name 'net' [ 34.974644] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:21:29 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000002 RCX=ffffffff813fc625 RDX=0000000000003fc6 RSI=0000000000003fc6 RDI=ffffffff864f9908 RBP=ffff88806ce099c0 RSP=ffff88806ce098f8 R8 =0000000000000000 R9 =ffff88806ce099a8 R10=0000000000038001 R11=000000000001250e R12=ffff88806ce099c8 R13=ffff88806ce099b0 R14=ffff88806ce099a9 R15=ffff88806ce09968 RIP=ffffffff811307c2 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 00007f23d0995700 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=00007fc6f5d670b0 CR3=000000000fd08000 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=3a5d3932325b646873732038323a3132 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323338 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f4203f9e590 CR3=0000000013ac6000 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=bbd8c5d081bf1ba3c14fd321620a5c19 XMM02=2c67c8bc2e329bc3000000000011b790 XMM03=fb795ef6d65770560000000000122570 XMM04=456a989271b75b2000000000000ae988 XMM05=19e9129bd510f23500000000001323e8 XMM06=18717805a1ccfc1c0000000000131250 XMM07=e042d86d42eb936e00000000001227f0 XMM08=6a910aab0093a639000000000011b7f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000