[ 31.533024] BUG: Bad rss-counter state mm:000000003bddbe0a type:MM_FILEPAGES val:33 [ 31.534216] BUG: Bad rss-counter state mm:000000003bddbe0a type:MM_ANONPAGES val:22 [ 31.569899] ================================================================== [ 31.570927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.571987] Read of size 8 at addr ffff88800ded9798 by task sshd/218 [ 31.572772] [ 31.572991] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.573914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.574919] Call Trace: [ 31.575248] [ 31.575538] dump_stack_lvl+0x91/0xf0 [ 31.576047] print_report+0xcc/0x620 [ 31.576541] ? __virt_addr_valid+0x102/0x340 [ 31.577094] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.577723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.578354] kasan_report+0xbe/0xf0 [ 31.578838] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.579462] vma_interval_tree_remove+0xc75/0xec0 [ 31.580066] vma_prepare+0xc54/0x11a0 [ 31.580546] __split_vma+0x5af/0x950 [ 31.581016] ? __pfx___split_vma+0x10/0x10 [ 31.581547] ? find_held_lock+0x2c/0x110 [ 31.582069] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.582661] ? lock_is_held_type+0x9f/0x120 [ 31.583205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.583811] ? mtree_range_walk+0x632/0x900 [ 31.584367] ? mas_walk+0x5c7/0x7c0 [ 31.584846] do_vmi_munmap+0x1f1/0x2b0 [ 31.585341] mmap_region+0x1f9/0x2660 [ 31.585825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.586338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.587064] ? __pfx_lock_acquire+0x10/0x10 [ 31.587601] ? __pfx_mmap_region+0x10/0x10 [ 31.588131] ? security_mmap_addr+0x7d/0xa0 [ 31.588670] ? get_unmapped_area+0x1f5/0x3f0 [ 31.589229] do_mmap+0x854/0xf00 [ 31.589672] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.590168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.590745] ksys_mmap_pgoff+0x3af/0x500 [ 31.591262] do_syscall_64+0x3f/0x90 [ 31.591749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.592408] RIP: 0033:0x7f25ff872d82 [ 31.592866] 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 [ 31.595026] RSP: 002b:00007fff7e86ade8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.595931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25ff872d82 [ 31.596785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25fecac000 [ 31.597642] RBP: 00007f25fecac000 R08: 0000000000000009 R09: 0000000000001000 [ 31.598509] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0ecd06ec0 [ 31.599368] R13: 00007fff7e86ae00 R14: 00007fff7e86ae30 R15: 00007fff7e86b190 [ 31.600234] [ 31.600532] [ 31.600749] Allocated by task 210: [ 31.601187] kasan_save_stack+0x22/0x50 [ 31.601698] kasan_set_track+0x25/0x30 [ 31.602194] __kasan_slab_alloc+0x59/0x70 [ 31.602746] kmem_cache_alloc+0x16b/0x370 [ 31.603298] vm_area_dup+0x20/0x160 [ 31.603758] __split_vma+0x170/0x950 [ 31.604231] split_vma+0xc6/0x110 [ 31.604677] mprotect_fixup+0x8d2/0xb30 [ 31.605182] do_mprotect_pkey+0x87e/0xd40 [ 31.605728] __x64_sys_mprotect+0x78/0xc0 [ 31.606260] do_syscall_64+0x3f/0x90 [ 31.606746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.607396] [ 31.607619] Freed by task 19: [ 31.608007] kasan_save_stack+0x22/0x50 [ 31.608519] kasan_set_track+0x25/0x30 [ 31.609017] kasan_save_free_info+0x2b/0x50 [ 31.609552] __kasan_slab_free+0x10a/0x190 [ 31.610099] kmem_cache_free+0x10d/0x4d0 [ 31.610612] rcu_core+0x8c8/0x2860 [ 31.611064] __do_softirq+0x1b7/0x7d4 [ 31.611550] [ 31.611775] Last potentially related work creation: [ 31.612372] kasan_save_stack+0x22/0x50 [ 31.612881] __kasan_record_aux_stack+0x8e/0xa0 [ 31.613465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.614115] remove_vma+0x139/0x170 [ 31.614593] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.615157] do_vmi_munmap+0x1f1/0x2b0 [ 31.615650] __vm_munmap+0x138/0x3a0 [ 31.616123] __x64_sys_munmap+0x59/0x80 [ 31.616628] do_syscall_64+0x3f/0x90 [ 31.617105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.617759] [ 31.617976] Second to last potentially related work creation: [ 31.618671] kasan_save_stack+0x22/0x50 [ 31.619177] __kasan_record_aux_stack+0x8e/0xa0 [ 31.619755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.620400] remove_vma+0x139/0x170 [ 31.620855] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.621415] do_vmi_munmap+0x1f1/0x2b0 [ 31.621904] mmap_region+0x1f9/0x2660 [ 31.622383] do_mmap+0x854/0xf00 [ 31.622832] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.623321] ksys_mmap_pgoff+0x7d/0x500 [ 31.623813] do_syscall_64+0x3f/0x90 [ 31.624285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.624940] [ 31.625157] The buggy address belongs to the object at ffff88800ded9740 [ 31.625157] which belongs to the cache vm_area_struct of size 168 [ 31.626657] The buggy address is located 88 bytes inside of [ 31.626657] freed 168-byte region [ffff88800ded9740, ffff88800ded97e8) [ 31.628081] [ 31.628300] The buggy address belongs to the physical page: [ 31.628977] page:000000001374e8be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded9 [ 31.630083] memcg:ffff88801443de01 [ 31.630530] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.631189] page_type: 0xffffffff() [ 31.631651] raw: 0100000000000200 ffff8880087a0c80 ffffea000037dac0 dead000000000002 [ 31.632576] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801443de01 [ 31.633501] page dumped because: kasan: bad access detected [ 31.634158] [ 31.634381] Memory state around the buggy address: [ 31.634980] ffff88800ded9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.635841] ffff88800ded9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.636712] >ffff88800ded9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.637568] ^ [ 31.638080] ffff88800ded9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.638943] ffff88800ded9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.639802] ================================================================== [ 31.640858] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.730044] BUG: Bad rss-counter state mm:000000007f01a68b type:MM_FILEPAGES val:33 [ 33.731590] BUG: Bad rss-counter state mm:000000007f01a68b type:MM_ANONPAGES val:22 [ 34.189179] BUG: Bad rss-counter state mm:00000000f8694862 type:MM_FILEPAGES val:33 [ 34.190081] BUG: Bad rss-counter state mm:00000000f8694862 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58722' (ECDSA) to the list of known hosts. 2023/06/20 12:14:55 fuzzer started 2023/06/20 12:14:55 dialing manager at localhost:36067 2023/06/20 12:14:55 checking machine... 2023/06/20 12:14:55 checking revisions... [ 34.938844] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:14:55 testing simple program... [ 34.994334] cgroup: Unknown subsys name 'net' [ 35.064835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:14:55 Registers: info registers vcpu 0 RAX=0000000000000c00 RBX=000055ac1d37af80 RCX=000055ac1d388f40 RDX=0000000000001000 RSI=000055ac1d388f40 RDI=000055ac1d37af80 RBP=00007f4c202634a0 RSP=00007ffe1ff5afe8 R8 =000055ac1d389f0b R9 =00007f4c20261be0 R10=000000000000006f R11=0000000000000246 R12=0000000000000035 R13=00007f4c202628a0 R14=0000000000000d68 R15=0000000000000d68 RIP=00007f4c20123de0 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4c1fcaf900 00000000 00000000 GS =0000 0000000000000000 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=00007f4c20264650 CR3=000000000f1ee000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000040 RBX=ffff888008e37a20 RCX=ffffffff86138e01 RDX=1ffff110011c6f53 RSI=ffffffff8180c705 RDI=ffff888008e37a2c RBP=ffff888008e37a98 RSP=ffff888008e37938 R8 =ffffffff86138e90 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008e37a20 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff8880169aa800 RIP=ffffffff813ad553 RFL=00000283 [--S---C] 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 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=00007f3420b8d430 CR3=000000000c6a2000 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=18b820701797b2b5814968cd02de195c XMM02=eff9b2d0a8fce9cb000000000011c128 XMM03=2c67c8bc2e329bc3000000000011c250 XMM04=060f7c18d61db5e900000000000ae988 XMM05=ab71b26a0f3b273800000000001347a8 XMM06=751b9502027dc0b900000000001332d0 XMM07=fb795ef6d657705600000000001223f0 XMM08=2c67c8bc2e329bc3000000000011c250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000