[ 26.364274] BUG: Bad rss-counter state mm:00000000c7519575 type:MM_FILEPAGES val:33 [ 26.365108] BUG: Bad rss-counter state mm:00000000c7519575 type:MM_ANONPAGES val:22 [ 26.556086] ================================================================== [ 26.556982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.557927] Read of size 8 at addr ffff888019ac3b38 by task sshd/219 [ 26.558704] [ 26.558923] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.559958] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.560918] Call Trace: [ 26.561242] [ 26.561523] dump_stack_lvl+0x91/0xf0 [ 26.562019] print_report+0xcc/0x620 [ 26.562503] ? __virt_addr_valid+0x102/0x340 [ 26.563072] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.563683] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.564310] kasan_report+0xbe/0xf0 [ 26.564791] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.565410] vma_interval_tree_remove+0xc75/0xec0 [ 26.566010] vma_prepare+0xc54/0x11a0 [ 26.566493] __split_vma+0x5af/0x950 [ 26.567002] ? __pfx___split_vma+0x10/0x10 [ 26.567526] ? find_held_lock+0x2c/0x110 [ 26.568048] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.568615] ? lock_is_held_type+0x9f/0x120 [ 26.569166] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.569770] ? mtree_range_walk+0x632/0x900 [ 26.570322] ? mas_walk+0x5c7/0x7c0 [ 26.570806] do_vmi_munmap+0x1f1/0x2b0 [ 26.571297] mmap_region+0x1f9/0x2660 [ 26.571782] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.572290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.573013] ? __pfx_lock_acquire+0x10/0x10 [ 26.573536] ? __pfx_mmap_region+0x10/0x10 [ 26.574077] ? security_mmap_addr+0x7d/0xa0 [ 26.574633] ? get_unmapped_area+0x1f5/0x3f0 [ 26.575182] do_mmap+0x854/0xf00 [ 26.575622] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.576111] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.576673] ksys_mmap_pgoff+0x3af/0x500 [ 26.577187] do_syscall_64+0x3f/0x90 [ 26.577667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.578330] RIP: 0033:0x7f26b9a1ed82 [ 26.578806] 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 [ 26.580951] RSP: 002b:00007ffd6740c328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.581855] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26b9a1ed82 [ 26.582708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26b8e58000 [ 26.583557] RBP: 00007f26b8e58000 R08: 0000000000000009 R09: 0000000000001000 [ 26.584409] R10: 0000000000000812 R11: 0000000000000206 R12: 000056156b70ad90 [ 26.585246] R13: 00007ffd6740c340 R14: 00007ffd6740c370 R15: 00007ffd6740c6d0 [ 26.586091] [ 26.586388] [ 26.586608] Allocated by task 206: [ 26.587036] kasan_save_stack+0x22/0x50 [ 26.587537] kasan_set_track+0x25/0x30 [ 26.588028] __kasan_slab_alloc+0x59/0x70 [ 26.588555] kmem_cache_alloc+0x16b/0x370 [ 26.589065] vm_area_dup+0x20/0x160 [ 26.589515] __split_vma+0x170/0x950 [ 26.589977] split_vma+0xc6/0x110 [ 26.590410] mprotect_fixup+0x8d2/0xb30 [ 26.590930] do_mprotect_pkey+0x87e/0xd40 [ 26.591446] __x64_sys_mprotect+0x78/0xc0 [ 26.591964] do_syscall_64+0x3f/0x90 [ 26.592436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.593074] [ 26.593292] Freed by task 206: [ 26.593679] kasan_save_stack+0x22/0x50 [ 26.594176] kasan_set_track+0x25/0x30 [ 26.594674] kasan_save_free_info+0x2b/0x50 [ 26.595203] __kasan_slab_free+0x10a/0x190 [ 26.595729] kmem_cache_free+0x10d/0x4d0 [ 26.596241] rcu_core+0x8c8/0x2860 [ 26.596685] __do_softirq+0x1b7/0x7d4 [ 26.597160] [ 26.597373] Last potentially related work creation: [ 26.597950] kasan_save_stack+0x22/0x50 [ 26.598454] __kasan_record_aux_stack+0x8e/0xa0 [ 26.599043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.599689] remove_vma+0x139/0x170 [ 26.600136] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.600695] do_vmi_munmap+0x1f1/0x2b0 [ 26.601243] __vm_munmap+0x138/0x3a0 [ 26.601724] __x64_sys_munmap+0x59/0x80 [ 26.602215] do_syscall_64+0x3f/0x90 [ 26.602693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.603331] [ 26.603545] The buggy address belongs to the object at ffff888019ac3ae0 [ 26.603545] which belongs to the cache vm_area_struct of size 168 [ 26.605006] The buggy address is located 88 bytes inside of [ 26.605006] freed 168-byte region [ffff888019ac3ae0, ffff888019ac3b88) [ 26.606451] [ 26.606676] The buggy address belongs to the physical page: [ 26.607341] page:00000000c717d717 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ac3 [ 26.608450] memcg:ffff888019a3b401 [ 26.608883] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.609540] page_type: 0xffffffff() [ 26.610004] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.610956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a3b401 [ 26.611889] page dumped because: kasan: bad access detected [ 26.612567] [ 26.612787] Memory state around the buggy address: [ 26.613390] ffff888019ac3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.614260] ffff888019ac3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 26.615144] >ffff888019ac3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.615997] ^ [ 26.616613] ffff888019ac3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 26.617477] ffff888019ac3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 26.618347] ================================================================== [ 26.619293] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.279390] BUG: Bad rss-counter state mm:00000000ea4031be type:MM_FILEPAGES val:33 [ 28.280144] BUG: Bad rss-counter state mm:00000000ea4031be type:MM_ANONPAGES val:22 [ 28.787115] BUG: Bad rss-counter state mm:00000000187f1d25 type:MM_FILEPAGES val:33 [ 28.788307] BUG: Bad rss-counter state mm:00000000187f1d25 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13956' (ECDSA) to the list of known hosts. 2023/06/19 21:55:43 fuzzer started 2023/06/19 21:55:43 dialing manager at localhost:44161 2023/06/19 21:55:43 checking machine... 2023/06/19 21:55:43 checking revisions... [ 29.411403] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:55:43 testing simple program... [ 29.460728] cgroup: Unknown subsys name 'net' [ 29.511676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:55:40 Registers: info registers vcpu 0 RAX=ffff888019473680 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fe27e01 RSI=ffff88800fe27ee0 RDI=ffff88800fe27ee0 RBP=ffff88800fe27930 RSP=ffff88800fe27860 R8 =0000000000000001 R9 =ffff88800fe27918 R10=0000000000038001 R11=0000000000009789 R12=ffff88800fe27938 R13=ffff88800fe27920 R14=ffff88800fe27ee0 R15=ffff88800fe278d8 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007ffab8f09900 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=00007ffc2fce4000 CR3=000000000eeba000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f0ccb5e6780 CR3=0000000013a9c000 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=39dc5e1ef1a8a3bef1456f1fe1f39375 XMM02=2c67c8bc2e329bc3000000000011d978 XMM03=fb795ef6d65770560000000000122a88 XMM04=88e6dc695e28a2af00000000000ae988 XMM05=dfcdbad4f1609c370000000000133458 XMM06=349cfa191beae1680000000000132630 XMM07=e042d86d42eb936e0000000000123190 XMM08=04ba6bb7f1c14952000000000011d9d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000