[ 24.570931] BUG: Bad rss-counter state mm:0000000099ee621a type:MM_FILEPAGES val:33 [ 24.572148] BUG: Bad rss-counter state mm:0000000099ee621a type:MM_ANONPAGES val:22 [ 24.613360] ================================================================== [ 24.614312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.615446] Read of size 8 at addr ffff88800e03e968 by task sshd/218 [ 24.616246] [ 24.616473] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.617384] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.618426] Call Trace: [ 24.618771] [ 24.619069] dump_stack_lvl+0x91/0xf0 [ 24.619583] print_report+0xcc/0x620 [ 24.620085] ? __virt_addr_valid+0x102/0x340 [ 24.620658] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.621311] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.621981] kasan_report+0xbe/0xf0 [ 24.622489] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.623142] vma_interval_tree_remove+0xc75/0xec0 [ 24.623781] vma_prepare+0xc54/0x11a0 [ 24.624293] __split_vma+0x5af/0x950 [ 24.624799] ? __pfx___split_vma+0x10/0x10 [ 24.625353] ? find_held_lock+0x2c/0x110 [ 24.625928] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.626536] ? lock_is_held_type+0x9f/0x120 [ 24.627103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.627752] ? mtree_range_walk+0x632/0x900 [ 24.628341] ? mas_walk+0x5c7/0x7c0 [ 24.628846] do_vmi_munmap+0x1f1/0x2b0 [ 24.629370] mmap_region+0x1f9/0x2660 [ 24.629889] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.630428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.631178] ? __pfx_lock_acquire+0x10/0x10 [ 24.631735] ? __pfx_mmap_region+0x10/0x10 [ 24.632292] ? security_mmap_addr+0x7d/0xa0 [ 24.632865] ? get_unmapped_area+0x1f5/0x3f0 [ 24.633449] do_mmap+0x854/0xf00 [ 24.633934] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.634462] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.635062] ksys_mmap_pgoff+0x3af/0x500 [ 24.635604] do_syscall_64+0x3f/0x90 [ 24.636117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.636811] RIP: 0033:0x7f2557f93d82 [ 24.637298] 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 [ 24.639555] RSP: 002b:00007fff3b972548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.640514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2557f93d82 [ 24.641413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25573cd000 [ 24.642322] RBP: 00007f25573cd000 R08: 0000000000000009 R09: 0000000000001000 [ 24.643219] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e83aeb4f70 [ 24.644120] R13: 00007fff3b972560 R14: 00007fff3b972590 R15: 00007fff3b9728f0 [ 24.645035] [ 24.645345] [ 24.645575] Allocated by task 211: [ 24.646044] kasan_save_stack+0x22/0x50 [ 24.646582] kasan_set_track+0x25/0x30 [ 24.647103] __kasan_slab_alloc+0x59/0x70 [ 24.647658] kmem_cache_alloc+0x16b/0x370 [ 24.648208] vm_area_dup+0x20/0x160 [ 24.648684] __split_vma+0x170/0x950 [ 24.649186] split_vma+0xc6/0x110 [ 24.649656] mprotect_fixup+0x8d2/0xb30 [ 24.650204] do_mprotect_pkey+0x87e/0xd40 [ 24.650761] __x64_sys_mprotect+0x78/0xc0 [ 24.651321] do_syscall_64+0x3f/0x90 [ 24.651838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.652533] [ 24.652764] Freed by task 13: [ 24.653174] kasan_save_stack+0x22/0x50 [ 24.653716] kasan_set_track+0x25/0x30 [ 24.654391] kasan_save_free_info+0x2b/0x50 [ 24.654968] __kasan_slab_free+0x10a/0x190 [ 24.655568] kmem_cache_free+0x10d/0x4d0 [ 24.656124] rcu_core+0x8c8/0x2860 [ 24.656611] __do_softirq+0x1b7/0x7d4 [ 24.657129] [ 24.657363] Last potentially related work creation: [ 24.658027] kasan_save_stack+0x22/0x50 [ 24.658572] __kasan_record_aux_stack+0x8e/0xa0 [ 24.659195] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.659894] remove_vma+0x139/0x170 [ 24.660385] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.661002] do_vmi_munmap+0x1f1/0x2b0 [ 24.661543] __vm_munmap+0x138/0x3a0 [ 24.662063] __x64_sys_munmap+0x59/0x80 [ 24.662616] do_syscall_64+0x3f/0x90 [ 24.663142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.663856] [ 24.664095] Second to last potentially related work creation: [ 24.664844] kasan_save_stack+0x22/0x50 [ 24.665397] __kasan_record_aux_stack+0x8e/0xa0 [ 24.666039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.666742] remove_vma+0x139/0x170 [ 24.667241] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.667860] do_vmi_munmap+0x1f1/0x2b0 [ 24.668396] mmap_region+0x1f9/0x2660 [ 24.668929] do_mmap+0x854/0xf00 [ 24.669407] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.669966] ksys_mmap_pgoff+0x3af/0x500 [ 24.670526] do_syscall_64+0x3f/0x90 [ 24.671049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.671764] [ 24.672008] The buggy address belongs to the object at ffff88800e03e910 [ 24.672008] which belongs to the cache vm_area_struct of size 168 [ 24.673647] The buggy address is located 88 bytes inside of [ 24.673647] freed 168-byte region [ffff88800e03e910, ffff88800e03e9b8) [ 24.675240] [ 24.675489] The buggy address belongs to the physical page: [ 24.676235] page:00000000f2ab8a92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe03e [ 24.677452] memcg:ffff88801672cc01 [ 24.677947] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.678676] page_type: 0xffffffff() [ 24.679179] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4100 0000000000000008 [ 24.680220] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801672cc01 [ 24.681232] page dumped because: kasan: bad access detected [ 24.681988] [ 24.682231] Memory state around the buggy address: [ 24.682886] ffff88800e03e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.683843] ffff88800e03e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.684801] >ffff88800e03e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.685754] ^ [ 24.686691] ffff88800e03e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.687671] ffff88800e03ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.688624] ================================================================== [ 24.689780] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.569524] BUG: Bad rss-counter state mm:0000000080acaf91 type:MM_FILEPAGES val:33 [ 26.570452] BUG: Bad rss-counter state mm:0000000080acaf91 type:MM_ANONPAGES val:22 [ 27.034968] BUG: Bad rss-counter state mm:00000000a9480ea1 type:MM_FILEPAGES val:33 [ 27.035794] BUG: Bad rss-counter state mm:00000000a9480ea1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24713' (ECDSA) to the list of known hosts. 2023/06/20 17:47:29 fuzzer started 2023/06/20 17:47:30 dialing manager at localhost:36067 2023/06/20 17:47:30 checking machine... 2023/06/20 17:47:30 checking revisions... [ 27.665442] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:47:30 testing simple program... [ 27.706059] cgroup: Unknown subsys name 'net' [ 27.757226] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:47:29 Registers: info registers vcpu 0 RAX=ffffffff83863b7b RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880168ef830 RSI=ffffffff83863b7b RDI=ffff8880168ef7e8 RBP=ffff8880168ef840 RSP=ffff8880168ef778 R8 =0000000000000001 R9 =ffff8880168ef828 R10=0000000000038001 R11=000000000009195a R12=ffff8880168ef8b0 R13=ffff8880168ef830 R14=ffff8880197ad1c0 R15=ffff8880168ef7e8 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 00007fc5b83ce900 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=00007ffce23b6000 CR3=000000000d73c000 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=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=00007f2c68285250 CR3=0000000013ffc000 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=2039323a37343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a37343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000