[ 31.453276] BUG: Bad rss-counter state mm:000000007788d544 type:MM_FILEPAGES val:33 [ 31.454350] BUG: Bad rss-counter state mm:000000007788d544 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.570772] ================================================================== [ 31.571615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.572488] Read of size 8 at addr ffff88800dc26b38 by task sshd/220 [ 31.573213] [ 31.573428] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.574340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.575278] Call Trace: [ 31.575579] [ 31.575786] dump_stack_lvl+0x91/0xf0 [ 31.576117] print_report+0xcc/0x620 [ 31.576432] ? __virt_addr_valid+0x102/0x340 [ 31.576787] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.577191] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.577602] kasan_report+0xbe/0xf0 [ 31.577911] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.578318] vma_interval_tree_remove+0xc75/0xec0 [ 31.578708] vma_prepare+0xc54/0x11a0 [ 31.579031] __split_vma+0x5af/0x950 [ 31.579338] ? __pfx___split_vma+0x10/0x10 [ 31.579684] ? find_held_lock+0x2c/0x110 [ 31.580025] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.580396] ? lock_is_held_type+0x9f/0x120 [ 31.580753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.581153] ? mtree_range_walk+0x632/0x900 [ 31.581518] ? mas_walk+0x5c7/0x7c0 [ 31.581826] do_vmi_munmap+0x1f1/0x2b0 [ 31.582147] mmap_region+0x1f9/0x2660 [ 31.582461] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.582792] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.583264] ? __pfx_lock_acquire+0x10/0x10 [ 31.583616] ? __pfx_mmap_region+0x10/0x10 [ 31.583960] ? security_mmap_addr+0x7d/0xa0 [ 31.584310] ? get_unmapped_area+0x1f5/0x3f0 [ 31.584671] do_mmap+0x854/0xf00 [ 31.584956] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.585282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.585648] ksys_mmap_pgoff+0x3af/0x500 [ 31.585980] do_syscall_64+0x3f/0x90 [ 31.586295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586722] RIP: 0033:0x7f3284268d82 [ 31.587034] 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 [ 31.588384] RSP: 002b:00007ffe8a402df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.588839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3284268d82 [ 31.589265] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32836a2000 [ 31.589693] RBP: 00007f32836a2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.590115] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a738256ec0 [ 31.590542] R13: 00007ffe8a402e10 R14: 00007ffe8a402e40 R15: 00007ffe8a4031a0 [ 31.590980] [ 31.591129] [ 31.591239] Allocated by task 213: [ 31.591456] kasan_save_stack+0x22/0x50 [ 31.591710] kasan_set_track+0x25/0x30 [ 31.591960] __kasan_slab_alloc+0x59/0x70 [ 31.592225] kmem_cache_alloc+0x16b/0x370 [ 31.592485] vm_area_dup+0x20/0x160 [ 31.592714] __split_vma+0x170/0x950 [ 31.592949] split_vma+0xc6/0x110 [ 31.593171] mprotect_fixup+0x8d2/0xb30 [ 31.593425] do_mprotect_pkey+0x87e/0xd40 [ 31.593687] __x64_sys_mprotect+0x78/0xc0 [ 31.593949] do_syscall_64+0x3f/0x90 [ 31.594190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.594513] [ 31.594623] Freed by task 204: [ 31.594821] kasan_save_stack+0x22/0x50 [ 31.595083] kasan_set_track+0x25/0x30 [ 31.595333] kasan_save_free_info+0x2b/0x50 [ 31.595602] __kasan_slab_free+0x10a/0x190 [ 31.595870] kmem_cache_free+0x10d/0x4d0 [ 31.596126] rcu_core+0x8c8/0x2860 [ 31.596351] __do_softirq+0x1b7/0x7d4 [ 31.596600] [ 31.596710] Last potentially related work creation: [ 31.597003] kasan_save_stack+0x22/0x50 [ 31.597257] __kasan_record_aux_stack+0x8e/0xa0 [ 31.597545] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.597869] remove_vma+0x139/0x170 [ 31.598096] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.598375] do_vmi_munmap+0x1f1/0x2b0 [ 31.598621] __vm_munmap+0x138/0x3a0 [ 31.598856] __x64_sys_munmap+0x59/0x80 [ 31.599123] do_syscall_64+0x3f/0x90 [ 31.599363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.599697] [ 31.599809] The buggy address belongs to the object at ffff88800dc26ae0 [ 31.599809] which belongs to the cache vm_area_struct of size 168 [ 31.600552] The buggy address is located 88 bytes inside of [ 31.600552] freed 168-byte region [ffff88800dc26ae0, ffff88800dc26b88) [ 31.601263] [ 31.601373] The buggy address belongs to the physical page: [ 31.601707] page:00000000a76593a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc26 [ 31.602258] memcg:ffff88800dc79401 [ 31.602476] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.602804] page_type: 0xffffffff() [ 31.603039] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.603508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc79401 [ 31.603967] page dumped because: kasan: bad access detected [ 31.604302] [ 31.604412] Memory state around the buggy address: [ 31.604710] ffff88800dc26a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.605143] ffff88800dc26a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.605584] >ffff88800dc26b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.606015] ^ [ 31.606325] ffff88800dc26b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.606761] ffff88800dc26c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.607202] ================================================================== [ 31.607767] Disabling lock debugging due to kernel taint [ 34.355170] BUG: Bad rss-counter state mm:000000007752fde3 type:MM_FILEPAGES val:33 [ 34.356115] BUG: Bad rss-counter state mm:000000007752fde3 type:MM_ANONPAGES val:22 [ 34.868365] BUG: Bad rss-counter state mm:0000000064f41167 type:MM_FILEPAGES val:33 [ 34.869323] BUG: Bad rss-counter state mm:0000000064f41167 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7482' (ECDSA) to the list of known hosts. 2023/06/21 02:29:52 fuzzer started 2023/06/21 02:29:53 dialing manager at localhost:36067 2023/06/21 02:29:53 checking machine... 2023/06/21 02:29:53 checking revisions... [ 35.598215] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:29:53 testing simple program... [ 35.654398] cgroup: Unknown subsys name 'net' [ 35.716768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:29:52 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=00007f1f7c3ec01c CR3=000000000e09c000 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=2032353a39323a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a39323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9e1353 RSI=ffffffff8180c705 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a70 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880146f0000 R15=ffff88806cf09a98 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007fee56413900 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=00007f1f7c9ed650 CR3=000000000cfd2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4ebd8dd745629d9100000000000ae988 XMM05=91e7b11b3c438a790000000000134178 XMM06=1f897542e8ef5e250000000000132ba8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000002000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000