[ 29.395979] BUG: Bad rss-counter state mm:00000000f5a522dc type:MM_FILEPAGES val:33 [ 29.397026] BUG: Bad rss-counter state mm:00000000f5a522dc type:MM_ANONPAGES val:22 [ 29.562511] ================================================================== [ 29.563388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.564274] Read of size 8 at addr ffff88801bc25310 by task sshd/219 [ 29.565176] [ 29.565382] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.566184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.567104] Call Trace: [ 29.567401] [ 29.567660] dump_stack_lvl+0x91/0xf0 [ 29.568122] print_report+0xcc/0x620 [ 29.568580] ? __virt_addr_valid+0x102/0x340 [ 29.569103] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.569668] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.570236] kasan_report+0xbe/0xf0 [ 29.570669] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.571271] vma_interval_tree_remove+0xc75/0xec0 [ 29.571819] vma_prepare+0xc54/0x11a0 [ 29.572274] __split_vma+0x5af/0x950 [ 29.572739] ? __pfx___split_vma+0x10/0x10 [ 29.573233] ? find_held_lock+0x2c/0x110 [ 29.573724] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.574249] ? lock_is_held_type+0x9f/0x120 [ 29.574754] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.575332] ? mtree_range_walk+0x632/0x900 [ 29.575848] ? mas_walk+0x5c7/0x7c0 [ 29.576289] do_vmi_munmap+0x1f1/0x2b0 [ 29.576757] mmap_region+0x1f9/0x2660 [ 29.577213] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.577679] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.578349] ? __pfx_lock_acquire+0x10/0x10 [ 29.578845] ? __pfx_mmap_region+0x10/0x10 [ 29.579351] ? security_mmap_addr+0x7d/0xa0 [ 29.579829] ? get_unmapped_area+0x1f5/0x3f0 [ 29.580361] do_mmap+0x854/0xf00 [ 29.580785] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.581261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.581793] ksys_mmap_pgoff+0x3af/0x500 [ 29.582260] do_syscall_64+0x3f/0x90 [ 29.582713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.583318] RIP: 0033:0x7fcb1721dd82 [ 29.583741] 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 [ 29.585736] RSP: 002b:00007fff8a03e638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.586621] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb1721dd82 [ 29.587431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb16657000 [ 29.588264] RBP: 00007fcb16657000 R08: 0000000000000009 R09: 0000000000001000 [ 29.589102] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564088342d90 [ 29.589912] R13: 00007fff8a03e650 R14: 00007fff8a03e680 R15: 00007fff8a03e9e0 [ 29.590735] [ 29.591026] [ 29.591226] Allocated by task 209: [ 29.591635] kasan_save_stack+0x22/0x50 [ 29.592133] kasan_set_track+0x25/0x30 [ 29.592632] __kasan_slab_alloc+0x59/0x70 [ 29.593156] kmem_cache_alloc+0x16b/0x370 [ 29.593650] vm_area_dup+0x20/0x160 [ 29.594097] __split_vma+0x170/0x950 [ 29.594539] split_vma+0xc6/0x110 [ 29.594977] mprotect_fixup+0x8d2/0xb30 [ 29.595457] do_mprotect_pkey+0x87e/0xd40 [ 29.595957] __x64_sys_mprotect+0x78/0xc0 [ 29.596448] do_syscall_64+0x3f/0x90 [ 29.596923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.597540] [ 29.597743] Freed by task 209: [ 29.598132] kasan_save_stack+0x22/0x50 [ 29.598602] kasan_set_track+0x25/0x30 [ 29.599080] kasan_save_free_info+0x2b/0x50 [ 29.599586] __kasan_slab_free+0x10a/0x190 [ 29.600095] kmem_cache_free+0x10d/0x4d0 [ 29.600598] rcu_core+0x8c8/0x2860 [ 29.601025] __do_softirq+0x1b7/0x7d4 [ 29.601479] [ 29.601679] Last potentially related work creation: [ 29.602241] kasan_save_stack+0x22/0x50 [ 29.602714] __kasan_record_aux_stack+0x8e/0xa0 [ 29.603273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.603906] remove_vma+0x139/0x170 [ 29.604451] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.605071] do_vmi_munmap+0x1f1/0x2b0 [ 29.605534] __vm_munmap+0x138/0x3a0 [ 29.605984] __x64_sys_munmap+0x59/0x80 [ 29.606531] do_syscall_64+0x3f/0x90 [ 29.606993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.607602] [ 29.607808] The buggy address belongs to the object at ffff88801bc252b8 [ 29.607808] which belongs to the cache vm_area_struct of size 168 [ 29.609230] The buggy address is located 88 bytes inside of [ 29.609230] freed 168-byte region [ffff88801bc252b8, ffff88801bc25360) [ 29.610556] [ 29.610760] The buggy address belongs to the physical page: [ 29.611422] page:0000000057176635 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc25 [ 29.612460] memcg:ffff888019bc1701 [ 29.612890] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.613490] page_type: 0xffffffff() [ 29.613925] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.614797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bc1701 [ 29.615677] page dumped because: kasan: bad access detected [ 29.616317] [ 29.616528] Memory state around the buggy address: [ 29.617087] ffff88801bc25200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 29.617898] ffff88801bc25280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.618712] >ffff88801bc25300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.619505] ^ [ 29.619958] ffff88801bc25380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.620777] ffff88801bc25400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.621573] ================================================================== [ 29.622504] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.676892] BUG: Bad rss-counter state mm:00000000101e28de type:MM_FILEPAGES val:33 [ 31.678090] BUG: Bad rss-counter state mm:00000000101e28de type:MM_ANONPAGES val:22 [ 32.121618] BUG: Bad rss-counter state mm:00000000a3555d48 type:MM_FILEPAGES val:33 [ 32.122606] BUG: Bad rss-counter state mm:00000000a3555d48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63996' (ECDSA) to the list of known hosts. 2023/06/20 08:48:22 fuzzer started 2023/06/20 08:48:22 dialing manager at localhost:44161 2023/06/20 08:48:22 checking machine... 2023/06/20 08:48:22 checking revisions... [ 32.896656] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:48:23 testing simple program... [ 32.961265] cgroup: Unknown subsys name 'net' [ 33.004073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:48:17 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000e0a5587d RCX=ffff88806c6ac3e8 RDX=000000000000000d RSI=0000000000000002 RDI=0000000071dd7ba1 RBP=ffff8880094cd210 RSP=ffff88801ca67a00 R8 =00000000d4740c8e R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801ca67a68 R15=000000000000000d RIP=ffffffff82270f13 RFL=00000206 [-----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 00007f6502093900 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=00007ffff4e2c000 CR3=000000000eb1a000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f42a93c9790 CR3=000000000ec04000 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=38343a3830203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000