[ 23.778788] BUG: Bad rss-counter state mm:000000003a5c14d1 type:MM_FILEPAGES val:33 [ 23.779954] BUG: Bad rss-counter state mm:000000003a5c14d1 type:MM_ANONPAGES val:22 [ 23.887957] ================================================================== [ 23.889085] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.890247] Read of size 8 at addr ffff88801a65b228 by task sshd/222 [ 23.891353] [ 23.891622] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.892686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.893746] Call Trace: [ 23.893936] [ 23.894128] dump_stack_lvl+0x91/0xf0 [ 23.894415] print_report+0xcc/0x620 [ 23.894696] ? __virt_addr_valid+0x102/0x340 [ 23.895012] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.895370] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.895739] kasan_report+0xbe/0xf0 [ 23.896011] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.896376] vma_interval_tree_remove+0xc75/0xec0 [ 23.896728] vma_prepare+0xc54/0x11a0 [ 23.897005] __split_vma+0x5af/0x950 [ 23.897279] ? __pfx___split_vma+0x10/0x10 [ 23.897591] ? find_held_lock+0x2c/0x110 [ 23.897901] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.898236] ? lock_is_held_type+0x9f/0x120 [ 23.898548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.898908] ? mtree_range_walk+0x632/0x900 [ 23.899233] ? mas_walk+0x5c7/0x7c0 [ 23.899509] do_vmi_munmap+0x1f1/0x2b0 [ 23.899799] mmap_region+0x1f9/0x2660 [ 23.900076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.900375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.900791] ? __pfx_lock_acquire+0x10/0x10 [ 23.901103] ? __pfx_mmap_region+0x10/0x10 [ 23.901407] ? security_mmap_addr+0x7d/0xa0 [ 23.901719] ? get_unmapped_area+0x1f5/0x3f0 [ 23.902057] do_mmap+0x854/0xf00 [ 23.902315] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.902597] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.902923] ksys_mmap_pgoff+0x3af/0x500 [ 23.903223] do_syscall_64+0x3f/0x90 [ 23.903500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.903881] RIP: 0033:0x7f54e3bd8d82 [ 23.904150] 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 [ 23.905417] RSP: 002b:00007ffed6203698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.905964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54e3bd8d82 [ 23.906472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54e3012000 [ 23.906982] RBP: 00007f54e3012000 R08: 0000000000000009 R09: 0000000000001000 [ 23.907488] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d6ebaaec0 [ 23.907998] R13: 00007ffed62036b0 R14: 00007ffed62036e0 R15: 00007ffed6203a40 [ 23.908515] [ 23.908693] [ 23.908821] Allocated by task 215: [ 23.909073] kasan_save_stack+0x22/0x50 [ 23.909372] kasan_set_track+0x25/0x30 [ 23.909658] __kasan_slab_alloc+0x59/0x70 [ 23.909959] kmem_cache_alloc+0x16b/0x370 [ 23.910278] vm_area_dup+0x20/0x160 [ 23.910548] __split_vma+0x170/0x950 [ 23.910823] split_vma+0xc6/0x110 [ 23.911080] mprotect_fixup+0x8d2/0xb30 [ 23.911369] do_mprotect_pkey+0x87e/0xd40 [ 23.911670] __x64_sys_mprotect+0x78/0xc0 [ 23.911971] do_syscall_64+0x3f/0x90 [ 23.912251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.912629] [ 23.912758] Freed by task 215: [ 23.912990] kasan_save_stack+0x22/0x50 [ 23.913288] kasan_set_track+0x25/0x30 [ 23.913578] kasan_save_free_info+0x2b/0x50 [ 23.913894] __kasan_slab_free+0x10a/0x190 [ 23.914208] kmem_cache_free+0x10d/0x4d0 [ 23.914504] rcu_core+0x8c8/0x2860 [ 23.914766] __do_softirq+0x1b7/0x7d4 [ 23.915051] [ 23.915176] Last potentially related work creation: [ 23.915523] kasan_save_stack+0x22/0x50 [ 23.915820] __kasan_record_aux_stack+0x8e/0xa0 [ 23.916162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.916535] remove_vma+0x139/0x170 [ 23.916800] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.917130] do_vmi_munmap+0x1f1/0x2b0 [ 23.917407] __vm_munmap+0x138/0x3a0 [ 23.917678] __x64_sys_munmap+0x59/0x80 [ 23.917967] do_syscall_64+0x3f/0x90 [ 23.918264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.918642] [ 23.918767] The buggy address belongs to the object at ffff88801a65b1d0 [ 23.918767] which belongs to the cache vm_area_struct of size 168 [ 23.919633] The buggy address is located 88 bytes inside of [ 23.919633] freed 168-byte region [ffff88801a65b1d0, ffff88801a65b278) [ 23.920460] [ 23.920587] The buggy address belongs to the physical page: [ 23.920982] page:00000000b09ad61e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a65b [ 23.921625] memcg:ffff88801b92a301 [ 23.921875] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.922257] page_type: 0xffffffff() [ 23.922526] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.923059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b92a301 [ 23.923596] page dumped because: kasan: bad access detected [ 23.923979] [ 23.924106] Memory state around the buggy address: [ 23.924452] ffff88801a65b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.924967] ffff88801a65b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.925466] >ffff88801a65b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.925970] ^ [ 23.926310] ffff88801a65b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.926788] ffff88801a65b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.927254] ================================================================== [ 23.927842] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.931326] BUG: Bad rss-counter state mm:00000000e3bba6bf type:MM_FILEPAGES val:33 [ 25.933038] BUG: Bad rss-counter state mm:00000000e3bba6bf type:MM_ANONPAGES val:22 [ 26.428827] BUG: Bad rss-counter state mm:000000000a935891 type:MM_FILEPAGES val:33 [ 26.430405] BUG: Bad rss-counter state mm:000000000a935891 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48495' (ECDSA) to the list of known hosts. 2023/06/20 11:09:19 fuzzer started 2023/06/20 11:09:19 dialing manager at localhost:36067 2023/06/20 11:09:19 checking machine... 2023/06/20 11:09:19 checking revisions... [ 27.187468] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:09:19 testing simple program... [ 27.247159] cgroup: Unknown subsys name 'net' [ 27.333705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:09:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd532c4448 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f0f4373c5100000561455eec790 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 info registers vcpu 1 RAX=1ffffffff0bbfc07 RBX=ffffffff85dfe038 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe038 RSP=ffff888014757910 R8 =ffffffff86138eb0 R9 =ffff888014757a08 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe038 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f28ed6f1900 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=00007fd0e268e650 CR3=000000000c530000 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=006c616e72756f6a2e6d65747379732f XMM01=ffffffffffffff00ffffffffffffff00 XMM02=00000000000000410000000000000038 XMM03=00007f006563696c732e6d6574737973 XMM04=f223d41c3219c16200000000000ae988 XMM05=46901e57e2ae53720000000000133ab8 XMM06=00c3ffa147b8d8570000000000132538 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000