syzkaller login: [ 125.416087] BUG: Bad rss-counter state mm:000000009419dad3 type:MM_FILEPAGES val:33 [ 125.417108] BUG: Bad rss-counter state mm:000000009419dad3 type:MM_ANONPAGES val:22 [ 125.580090] ================================================================== [ 125.580987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 125.581869] Read of size 8 at addr ffff88800f18c228 by task sshd/221 [ 125.582672] [ 125.582881] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 125.583859] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 125.584780] Call Trace: [ 125.585082] [ 125.585351] dump_stack_lvl+0x91/0xf0 [ 125.585816] print_report+0xcc/0x620 [ 125.586274] ? __virt_addr_valid+0x102/0x340 [ 125.586793] ? vma_interval_tree_remove+0xc75/0xec0 [ 125.587373] ? vma_interval_tree_remove+0xc75/0xec0 [ 125.587960] kasan_report+0xbe/0xf0 [ 125.588412] ? vma_interval_tree_remove+0xc75/0xec0 [ 125.588996] vma_interval_tree_remove+0xc75/0xec0 [ 125.589579] vma_prepare+0xc54/0x11a0 [ 125.590053] __split_vma+0x5af/0x950 [ 125.590520] ? __pfx___split_vma+0x10/0x10 [ 125.591031] ? find_held_lock+0x2c/0x110 [ 125.591537] do_vmi_align_munmap+0x2ba/0x11f0 [ 125.592113] ? lock_is_held_type+0x9f/0x120 [ 125.592647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 125.593257] ? mtree_range_walk+0x632/0x900 [ 125.593806] ? mas_walk+0x5c7/0x7c0 [ 125.594282] do_vmi_munmap+0x1f1/0x2b0 [ 125.594766] mmap_region+0x1f9/0x2660 [ 125.595242] ? vm_mmap_pgoff+0x15c/0x3a0 [ 125.595764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 125.596469] ? __pfx_lock_acquire+0x10/0x10 [ 125.596992] ? __pfx_mmap_region+0x10/0x10 [ 125.597527] ? security_mmap_addr+0x7d/0xa0 [ 125.598052] ? get_unmapped_area+0x1f5/0x3f0 [ 125.598602] do_mmap+0x854/0xf00 [ 125.599030] vm_mmap_pgoff+0x1a6/0x3a0 [ 125.599526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 125.600105] ksys_mmap_pgoff+0x3af/0x500 [ 125.600608] do_syscall_64+0x3f/0x90 [ 125.601075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 125.601718] RIP: 0033:0x7f0d9795ad82 [ 125.602172] 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 [ 125.604292] RSP: 002b:00007ffffbe343f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 125.605172] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0d9795ad82 [ 125.606012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0d96d94000 [ 125.606840] RBP: 00007f0d96d94000 R08: 0000000000000009 R09: 0000000000001000 [ 125.607677] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635c10c7ec0 [ 125.608526] R13: 00007ffffbe34410 R14: 00007ffffbe34440 R15: 00007ffffbe347a0 [ 125.609369] [ 125.609650] [ 125.609858] Allocated by task 214: [ 125.610276] kasan_save_stack+0x22/0x50 [ 125.610775] kasan_set_track+0x25/0x30 [ 125.611265] __kasan_slab_alloc+0x59/0x70 [ 125.611780] kmem_cache_alloc+0x16b/0x370 [ 125.612297] vm_area_dup+0x20/0x160 [ 125.612745] __split_vma+0x170/0x950 [ 125.613208] split_vma+0xc6/0x110 [ 125.613644] mprotect_fixup+0x8d2/0xb30 [ 125.614140] do_mprotect_pkey+0x87e/0xd40 [ 125.614654] __x64_sys_mprotect+0x78/0xc0 [ 125.615172] do_syscall_64+0x3f/0x90 [ 125.615642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 125.616287] [ 125.616504] Freed by task 214: [ 125.616885] kasan_save_stack+0x22/0x50 [ 125.617387] kasan_set_track+0x25/0x30 [ 125.617884] kasan_save_free_info+0x2b/0x50 [ 125.618412] __kasan_slab_free+0x10a/0x190 [ 125.618939] kmem_cache_free+0x10d/0x4d0 [ 125.619442] rcu_core+0x8c8/0x2860 [ 125.619899] __do_softirq+0x1b7/0x7d4 [ 125.620375] [ 125.620598] Last potentially related work creation: [ 125.621182] kasan_save_stack+0x22/0x50 [ 125.621683] __kasan_record_aux_stack+0x8e/0xa0 [ 125.622247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 125.622884] remove_vma+0x139/0x170 [ 125.623333] do_vmi_align_munmap+0xd4a/0x11f0 [ 125.623896] do_vmi_munmap+0x1f1/0x2b0 [ 125.624373] __vm_munmap+0x138/0x3a0 [ 125.624830] __x64_sys_munmap+0x59/0x80 [ 125.625308] do_syscall_64+0x3f/0x90 [ 125.625779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 125.626404] [ 125.626621] The buggy address belongs to the object at ffff88800f18c1d0 [ 125.626621] which belongs to the cache vm_area_struct of size 168 [ 125.628075] The buggy address is located 88 bytes inside of [ 125.628075] freed 168-byte region [ffff88800f18c1d0, ffff88800f18c278) [ 125.629470] [ 125.629680] The buggy address belongs to the physical page: [ 125.630337] page:0000000037145e5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf18c [ 125.631406] memcg:ffff88800e69b901 [ 125.631819] flags: 0x100000000000200(slab|node=0|zone=1) [ 125.632465] page_type: 0xffffffff() [ 125.632909] raw: 0100000000000200 ffff88800879fc80 ffffea000067a380 dead000000000008 [ 125.633814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e69b901 [ 125.634713] page dumped because: kasan: bad access detected [ 125.635368] [ 125.635579] Memory state around the buggy address: [ 125.636167] ffff88800f18c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 125.637024] ffff88800f18c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 125.637876] >ffff88800f18c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 125.638723] ^ [ 125.639277] ffff88800f18c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 125.640136] ffff88800f18c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 125.640971] ================================================================== [ 125.642017] Disabling lock debugging due to kernel taint [ 127.573645] BUG: Bad rss-counter state mm:0000000012c97b77 type:MM_FILEPAGES val:33 [ 127.574789] BUG: Bad rss-counter state mm:0000000012c97b77 type:MM_ANONPAGES val:22 [ 128.054326] BUG: Bad rss-counter state mm:0000000086c0d30a type:MM_FILEPAGES val:33 [ 128.055372] BUG: Bad rss-counter state mm:0000000086c0d30a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33952' (ECDSA) to the list of known hosts. 2023/06/20 06:26:28 fuzzer started 2023/06/20 06:26:28 dialing manager at localhost:44161 2023/06/20 06:26:28 checking machine... 2023/06/20 06:26:28 checking revisions... [ 128.826757] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:26:28 testing simple program... [ 128.871736] cgroup: Unknown subsys name 'net' [ 128.908087] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:24:52 Registers: info registers vcpu 0 RAX=ffffffff8661f20f RBX=0000000000000001 RCX=ffffffff812d869a RDX=ffff88806ce09ae0 RSI=ffffffff8661f20f RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=ffff88806ce09ae0 R14=ffffffff8542a6c0 R15=ffff88806ce09a98 RIP=ffffffff81130641 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 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=00007ff98db20c58 CR3=000000000d91e000 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=36323a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 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=0000000000000000 RBX=0000000000000200 RCX=ffffffff822443b9 RDX=ffff888015d351c0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000020 RSP=ffff888016697d88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=00000000000b6996 R12=ffffffff854145c0 R13=ffffffffffffffff R14=000000000003fd30 R15=fffffffffffffffd RIP=ffffffff814c07e0 RFL=00000006 [-----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 00007f2e9cbff900 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=00007ffd5a4e2000 CR3=000000000ea48000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000