syzkaller login: [ 31.691513] BUG: Bad rss-counter state mm:0000000008d69b8d type:MM_FILEPAGES val:33 [ 31.692748] BUG: Bad rss-counter state mm:0000000008d69b8d type:MM_ANONPAGES val:22 [ 31.730848] ================================================================== [ 31.731859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.732815] Read of size 8 at addr ffff88800e98c058 by task sshd/219 [ 31.733591] [ 31.733807] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.734678] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.735658] Call Trace: [ 31.735989] [ 31.736299] dump_stack_lvl+0x91/0xf0 [ 31.736787] print_report+0xcc/0x620 [ 31.737271] ? __virt_addr_valid+0x102/0x340 [ 31.737826] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.738449] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.739080] kasan_report+0xbe/0xf0 [ 31.739569] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740223] vma_interval_tree_remove+0xc75/0xec0 [ 31.740867] vma_prepare+0xc54/0x11a0 [ 31.741381] __split_vma+0x5af/0x950 [ 31.741880] ? __pfx___split_vma+0x10/0x10 [ 31.742452] ? find_held_lock+0x2c/0x110 [ 31.743011] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.743613] ? lock_is_held_type+0x9f/0x120 [ 31.744190] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.744844] ? mtree_range_walk+0x632/0x900 [ 31.745438] ? mas_walk+0x5c7/0x7c0 [ 31.745945] do_vmi_munmap+0x1f1/0x2b0 [ 31.746465] mmap_region+0x1f9/0x2660 [ 31.746968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.747510] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.748300] ? __pfx_lock_acquire+0x10/0x10 [ 31.748876] ? __pfx_mmap_region+0x10/0x10 [ 31.749449] ? security_mmap_addr+0x7d/0xa0 [ 31.750022] ? get_unmapped_area+0x1f5/0x3f0 [ 31.750607] do_mmap+0x854/0xf00 [ 31.751072] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.751588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.752182] ksys_mmap_pgoff+0x3af/0x500 [ 31.752724] do_syscall_64+0x3f/0x90 [ 31.753229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.753929] RIP: 0033:0x7fdcff2c2d82 [ 31.754415] 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 [ 31.756722] RSP: 002b:00007ffd2982eb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.757693] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcff2c2d82 [ 31.758745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcfe6fc000 [ 31.759665] RBP: 00007fdcfe6fc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.760595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f27442ec0 [ 31.761503] R13: 00007ffd2982eb30 R14: 00007ffd2982eb60 R15: 00007ffd2982eec0 [ 31.762437] [ 31.762760] [ 31.762992] Allocated by task 212: [ 31.763457] kasan_save_stack+0x22/0x50 [ 31.763996] kasan_set_track+0x25/0x30 [ 31.764534] __kasan_slab_alloc+0x59/0x70 [ 31.765102] kmem_cache_alloc+0x16b/0x370 [ 31.765653] vm_area_dup+0x20/0x160 [ 31.766136] __split_vma+0x170/0x950 [ 31.766638] split_vma+0xc6/0x110 [ 31.767104] mprotect_fixup+0x8d2/0xb30 [ 31.767643] do_mprotect_pkey+0x87e/0xd40 [ 31.768210] __x64_sys_mprotect+0x78/0xc0 [ 31.768771] do_syscall_64+0x3f/0x90 [ 31.769275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.769957] [ 31.770184] Freed by task 212: [ 31.770599] kasan_save_stack+0x22/0x50 [ 31.771130] kasan_set_track+0x25/0x30 [ 31.771659] kasan_save_free_info+0x2b/0x50 [ 31.772234] __kasan_slab_free+0x10a/0x190 [ 31.772792] kmem_cache_free+0x10d/0x4d0 [ 31.773337] rcu_core+0x8c8/0x2860 [ 31.773808] __do_softirq+0x1b7/0x7d4 [ 31.774318] [ 31.774550] Last potentially related work creation: [ 31.775182] kasan_save_stack+0x22/0x50 [ 31.775709] __kasan_record_aux_stack+0x8e/0xa0 [ 31.776332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.777017] remove_vma+0x139/0x170 [ 31.777507] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.778098] do_vmi_munmap+0x1f1/0x2b0 [ 31.778609] __vm_munmap+0x138/0x3a0 [ 31.779099] __x64_sys_munmap+0x59/0x80 [ 31.779624] do_syscall_64+0x3f/0x90 [ 31.780125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.780817] [ 31.781043] The buggy address belongs to the object at ffff88800e98c000 [ 31.781043] which belongs to the cache vm_area_struct of size 168 [ 31.782652] The buggy address is located 88 bytes inside of [ 31.782652] freed 168-byte region [ffff88800e98c000, ffff88800e98c0a8) [ 31.784188] [ 31.784424] The buggy address belongs to the physical page: [ 31.785142] page:00000000ced5249e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe98c [ 31.786314] memcg:ffff88800df6df01 [ 31.786774] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.787531] page_type: 0xffffffff() [ 31.788018] raw: 0100000000000200 ffff88800879fc80 ffffea0000392c00 dead000000000005 [ 31.789007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df6df01 [ 31.789967] page dumped because: kasan: bad access detected [ 31.790684] [ 31.790911] Memory state around the buggy address: [ 31.791542] ffff88800e98bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.792489] ffff88800e98bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.793421] >ffff88800e98c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.794348] ^ [ 31.795133] ffff88800e98c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.796044] ffff88800e98c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.796972] ================================================================== [ 31.798107] Disabling lock debugging due to kernel taint [ 33.611329] BUG: Bad rss-counter state mm:00000000e80e0e25 type:MM_FILEPAGES val:33 [ 33.612362] BUG: Bad rss-counter state mm:00000000e80e0e25 type:MM_ANONPAGES val:22 [ 34.087196] BUG: Bad rss-counter state mm:00000000c2e7c39f type:MM_FILEPAGES val:33 [ 34.088205] BUG: Bad rss-counter state mm:00000000c2e7c39f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19614' (ECDSA) to the list of known hosts. 2023/06/20 02:20:55 fuzzer started 2023/06/20 02:20:55 dialing manager at localhost:44161 2023/06/20 02:20:55 checking machine... 2023/06/20 02:20:55 checking revisions... [ 34.851245] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:20:56 testing simple program... [ 34.892999] cgroup: Unknown subsys name 'net' [ 34.942415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:20:55 Registers: info registers vcpu 0 RAX=ffff888010380001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801037fd01 RSI=ffff88801037fd40 RDI=ffff88801037f838 RBP=ffff88801037f880 RSP=ffff88801037f7a0 R8 =ffffffff86141e7a R9 =ffff88801037f868 R10=0000000000038001 R11=00000000000229c7 R12=ffff88801037f888 R13=ffff888010378000 R14=ffff88801037fd48 R15=ffff88801037f828 RIP=ffffffff811304d1 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 00007fb515b57900 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=00007ffeb08fc000 CR3=000000000edba000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016ef98d0 RBX=ffff88806cf09ee8 RCX=1ffff11002ddf31a RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=000000000000008b RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff888008d751c0 R15=ffff888016ef9ec0 RIP=ffffffff8137fc84 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 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=00007f38fa3c9de0 CR3=000000000c7e2000 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=2035353a30323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000