[ 30.881691] BUG: Bad rss-counter state mm:00000000d8a6dd2c type:MM_FILEPAGES val:33 [ 30.882905] BUG: Bad rss-counter state mm:00000000d8a6dd2c type:MM_ANONPAGES val:22 [ 30.920174] ================================================================== [ 30.921108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.921991] Read of size 8 at addr ffff88800f743228 by task sshd/219 [ 30.922821] [ 30.923028] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.923846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.924772] Call Trace: [ 30.925079] [ 30.925361] dump_stack_lvl+0x91/0xf0 [ 30.925830] print_report+0xcc/0x620 [ 30.926295] ? __virt_addr_valid+0x102/0x340 [ 30.926824] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.927421] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.927999] kasan_report+0xbe/0xf0 [ 30.928449] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.929042] vma_interval_tree_remove+0xc75/0xec0 [ 30.929618] vma_prepare+0xc54/0x11a0 [ 30.930086] __split_vma+0x5af/0x950 [ 30.930536] ? __pfx___split_vma+0x10/0x10 [ 30.931040] ? find_held_lock+0x2c/0x110 [ 30.931565] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.932106] ? lock_is_held_type+0x9f/0x120 [ 30.932633] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.933252] ? mtree_range_walk+0x632/0x900 [ 30.933815] ? mas_walk+0x5c7/0x7c0 [ 30.934284] do_vmi_munmap+0x1f1/0x2b0 [ 30.934791] mmap_region+0x1f9/0x2660 [ 30.935288] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.935816] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.936542] ? __pfx_lock_acquire+0x10/0x10 [ 30.937081] ? __pfx_mmap_region+0x10/0x10 [ 30.937619] ? security_mmap_addr+0x7d/0xa0 [ 30.938175] ? get_unmapped_area+0x1f5/0x3f0 [ 30.938734] do_mmap+0x854/0xf00 [ 30.939175] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.939716] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.940318] ksys_mmap_pgoff+0x3af/0x500 [ 30.940851] do_syscall_64+0x3f/0x90 [ 30.941357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942047] RIP: 0033:0x7f5f51f36d82 [ 30.942534] 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 [ 30.944783] RSP: 002b:00007ffc9376d288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.945743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f51f36d82 [ 30.946630] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f51370000 [ 30.947550] RBP: 00007f5f51370000 R08: 0000000000000009 R09: 0000000000001000 [ 30.948457] R10: 0000000000000812 R11: 0000000000000206 R12: 000056411852fec0 [ 30.949355] R13: 00007ffc9376d2a0 R14: 00007ffc9376d2d0 R15: 00007ffc9376d630 [ 30.950263] [ 30.950573] [ 30.950803] Allocated by task 212: [ 30.951266] kasan_save_stack+0x22/0x50 [ 30.951802] kasan_set_track+0x25/0x30 [ 30.952340] __kasan_slab_alloc+0x59/0x70 [ 30.952907] kmem_cache_alloc+0x16b/0x370 [ 30.953456] vm_area_dup+0x20/0x160 [ 30.953941] __split_vma+0x170/0x950 [ 30.954420] split_vma+0xc6/0x110 [ 30.954888] mprotect_fixup+0x8d2/0xb30 [ 30.955433] do_mprotect_pkey+0x87e/0xd40 [ 30.955990] __x64_sys_mprotect+0x78/0xc0 [ 30.956545] do_syscall_64+0x3f/0x90 [ 30.957055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957750] [ 30.957975] Freed by task 212: [ 30.958401] kasan_save_stack+0x22/0x50 [ 30.958933] kasan_set_track+0x25/0x30 [ 30.959466] kasan_save_free_info+0x2b/0x50 [ 30.960031] __kasan_slab_free+0x10a/0x190 [ 30.960599] kmem_cache_free+0x10d/0x4d0 [ 30.961137] rcu_core+0x8c8/0x2860 [ 30.961614] __do_softirq+0x1b7/0x7d4 [ 30.962124] [ 30.962358] Last potentially related work creation: [ 30.962981] kasan_save_stack+0x22/0x50 [ 30.963529] __kasan_record_aux_stack+0x8e/0xa0 [ 30.964140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.964834] remove_vma+0x139/0x170 [ 30.965314] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.965898] do_vmi_munmap+0x1f1/0x2b0 [ 30.966416] __vm_munmap+0x138/0x3a0 [ 30.966900] __x64_sys_munmap+0x59/0x80 [ 30.967460] do_syscall_64+0x3f/0x90 [ 30.967947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.968589] [ 30.968801] Second to last potentially related work creation: [ 30.969488] kasan_save_stack+0x22/0x50 [ 30.969998] __kasan_record_aux_stack+0x8e/0xa0 [ 30.970580] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.971234] remove_vma+0x139/0x170 [ 30.971709] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.972274] do_vmi_munmap+0x1f1/0x2b0 [ 30.972766] mmap_region+0x1f9/0x2660 [ 30.973253] do_mmap+0x854/0xf00 [ 30.973687] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.974179] ksys_mmap_pgoff+0x3af/0x500 [ 30.974686] do_syscall_64+0x3f/0x90 [ 30.975178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975835] [ 30.976043] The buggy address belongs to the object at ffff88800f7431d0 [ 30.976043] which belongs to the cache vm_area_struct of size 168 [ 30.977530] The buggy address is located 88 bytes inside of [ 30.977530] freed 168-byte region [ffff88800f7431d0, ffff88800f743278) [ 30.978954] [ 30.979178] The buggy address belongs to the physical page: [ 30.979879] page:000000001f68f197 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf743 [ 30.980992] memcg:ffff8880182adc01 [ 30.981446] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.982202] page_type: 0xffffffff() [ 30.982685] raw: 0100000000000200 ffff8880087a0c80 ffffea00005b4440 0000000000000005 [ 30.983703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182adc01 [ 30.984659] page dumped because: kasan: bad access detected [ 30.985331] [ 30.985559] Memory state around the buggy address: [ 30.986162] ffff88800f743100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.987043] ffff88800f743180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.987947] >ffff88800f743200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.988817] ^ [ 30.989375] ffff88800f743280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.990259] ffff88800f743300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.991136] ================================================================== [ 30.992288] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.850983] BUG: Bad rss-counter state mm:0000000066fbaee8 type:MM_FILEPAGES val:33 [ 32.852074] BUG: Bad rss-counter state mm:0000000066fbaee8 type:MM_ANONPAGES val:22 [ 33.302920] BUG: Bad rss-counter state mm:0000000039a571a2 type:MM_FILEPAGES val:33 [ 33.303963] BUG: Bad rss-counter state mm:0000000039a571a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49400' (ECDSA) to the list of known hosts. 2023/06/20 17:26:51 fuzzer started 2023/06/20 17:26:51 dialing manager at localhost:36067 2023/06/20 17:26:51 checking machine... 2023/06/20 17:26:51 checking revisions... [ 34.004080] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:26:51 testing simple program... [ 34.056088] cgroup: Unknown subsys name 'net' [ 34.095147] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:26:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000004 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff88800eb878c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880166b380c R13=0000000000000000 R14=ffff88801006c0b8 R15=ffff88801006c000 RIP=ffffffff814c03a4 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 00007fe763fff700 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=00007efe4b7ce850 CR3=000000001a050000 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=2031353a36323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a36323a3731203032 XMM08=3d656e696c646d632022656369767265 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=00007ffe9bc9d858 CR3=0000000005482000 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=00007f66f2360510000055def945d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000