[ 41.272955] BUG: Bad rss-counter state mm:00000000cefed079 type:MM_FILEPAGES val:33 [ 41.274274] BUG: Bad rss-counter state mm:00000000cefed079 type:MM_ANONPAGES val:22 [ 41.368951] ================================================================== [ 41.369660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.370383] Read of size 8 at addr ffff88801bc345c8 by task sshd/218 [ 41.370966] [ 41.371134] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.371787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.372522] Call Trace: [ 41.372866] [ 41.373082] dump_stack_lvl+0x91/0xf0 [ 41.373470] print_report+0xcc/0x620 [ 41.373836] ? __virt_addr_valid+0x102/0x340 [ 41.374250] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.374595] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.374932] kasan_report+0xbe/0xf0 [ 41.375193] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.375533] vma_interval_tree_remove+0xc75/0xec0 [ 41.375858] vma_prepare+0xc54/0x11a0 [ 41.376116] __split_vma+0x5af/0x950 [ 41.376370] ? __pfx___split_vma+0x10/0x10 [ 41.376654] ? find_held_lock+0x2c/0x110 [ 41.376938] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.377248] ? lock_is_held_type+0x9f/0x120 [ 41.377540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.377870] ? mtree_range_walk+0x632/0x900 [ 41.378166] ? mas_walk+0x5c7/0x7c0 [ 41.378431] do_vmi_munmap+0x1f1/0x2b0 [ 41.378706] mmap_region+0x1f9/0x2660 [ 41.378982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.379271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.379686] ? __pfx_lock_acquire+0x10/0x10 [ 41.379991] ? __pfx_mmap_region+0x10/0x10 [ 41.380290] ? security_mmap_addr+0x7d/0xa0 [ 41.380595] ? get_unmapped_area+0x1f5/0x3f0 [ 41.380913] do_mmap+0x854/0xf00 [ 41.381159] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.381454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.381770] ksys_mmap_pgoff+0x3af/0x500 [ 41.382058] do_syscall_64+0x3f/0x90 [ 41.382331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.382699] RIP: 0033:0x7fc54b648d82 [ 41.382963] 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 [ 41.384169] RSP: 002b:00007ffd7d8a1718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.384685] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc54b648d82 [ 41.385161] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc54aa82000 [ 41.385651] RBP: 00007fc54aa82000 R08: 0000000000000009 R09: 0000000000001000 [ 41.386123] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a67180fec0 [ 41.386598] R13: 00007ffd7d8a1730 R14: 00007ffd7d8a1760 R15: 00007ffd7d8a1ac0 [ 41.387085] [ 41.387246] [ 41.387365] Allocated by task 206: [ 41.387612] kasan_save_stack+0x22/0x50 [ 41.387898] kasan_set_track+0x25/0x30 [ 41.388171] __kasan_slab_alloc+0x59/0x70 [ 41.388461] kmem_cache_alloc+0x16b/0x370 [ 41.388758] vm_area_dup+0x20/0x160 [ 41.389012] __split_vma+0x170/0x950 [ 41.389278] split_vma+0xc6/0x110 [ 41.389522] mprotect_fixup+0x8d2/0xb30 [ 41.389796] do_mprotect_pkey+0x87e/0xd40 [ 41.390087] __x64_sys_mprotect+0x78/0xc0 [ 41.390381] do_syscall_64+0x3f/0x90 [ 41.390643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.390999] [ 41.391119] Freed by task 206: [ 41.391340] kasan_save_stack+0x22/0x50 [ 41.391628] kasan_set_track+0x25/0x30 [ 41.391905] kasan_save_free_info+0x2b/0x50 [ 41.392200] __kasan_slab_free+0x10a/0x190 [ 41.392496] kmem_cache_free+0x10d/0x4d0 [ 41.392775] rcu_core+0x8c8/0x2860 [ 41.393021] __do_softirq+0x1b7/0x7d4 [ 41.393304] [ 41.393423] Last potentially related work creation: [ 41.393752] kasan_save_stack+0x22/0x50 [ 41.394030] __kasan_record_aux_stack+0x8e/0xa0 [ 41.394345] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.394705] remove_vma+0x139/0x170 [ 41.394957] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.395263] do_vmi_munmap+0x1f1/0x2b0 [ 41.395529] __vm_munmap+0x138/0x3a0 [ 41.395790] __x64_sys_munmap+0x59/0x80 [ 41.396069] do_syscall_64+0x3f/0x90 [ 41.396330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.396687] [ 41.396807] The buggy address belongs to the object at ffff88801bc34570 [ 41.396807] which belongs to the cache vm_area_struct of size 168 [ 41.397624] The buggy address is located 88 bytes inside of [ 41.397624] freed 168-byte region [ffff88801bc34570, ffff88801bc34618) [ 41.398400] [ 41.398519] The buggy address belongs to the physical page: [ 41.398892] page:000000004cfdb633 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc34 [ 41.399503] memcg:ffff88801ab9f401 [ 41.399738] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.400098] page_type: 0xffffffff() [ 41.400346] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.400859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ab9f401 [ 41.401369] page dumped because: kasan: bad access detected [ 41.401737] [ 41.401863] Memory state around the buggy address: [ 41.402182] ffff88801bc34480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.402655] ffff88801bc34500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 41.403125] >ffff88801bc34580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.403596] ^ [ 41.403973] ffff88801bc34600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.404466] ffff88801bc34680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.404947] ================================================================== [ 41.405539] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 42.716719] BUG: Bad rss-counter state mm:000000001948a654 type:MM_FILEPAGES val:33 [ 42.717898] BUG: Bad rss-counter state mm:000000001948a654 type:MM_ANONPAGES val:22 [ 43.147309] BUG: Bad rss-counter state mm:0000000034015c6f type:MM_FILEPAGES val:33 [ 43.148527] BUG: Bad rss-counter state mm:0000000034015c6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42029' (ECDSA) to the list of known hosts. 2023/06/20 04:48:58 fuzzer started 2023/06/20 04:48:58 dialing manager at localhost:44161 2023/06/20 04:48:58 checking machine... 2023/06/20 04:48:58 checking revisions... [ 43.772357] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:48:58 testing simple program... [ 43.807817] cgroup: Unknown subsys name 'net' [ 43.856130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:48:40 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801461acd8 RCX=ffffffff8364dbfd RDX=fffffbfff0ff28f2 RSI=0000000000000004 RDI=ffffffff87f9478c RBP=0000000000000052 RSP=ffff888014737818 R8 =0000000000000001 R9 =fffffbfff0ff28f1 R10=ffffffff87f9478f R11=00000000000b6996 R12=ffff88801461a800 R13=ffffffff87f94640 R14=ffffffff87f9478c R15=ffff88801461aa74 RIP=ffffffff8364dc06 RFL=00000213 [----A-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 00007fcea0253900 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=00007fce9f66bf40 CR3=000000000c406000 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=bd0cbd0e1b6905a4a940788041226cd3 XMM02=000000000011e2c0d59e07bde36eea69 XMM03=000000000011e3e8ec2efd57dc4c00df XMM04=60680d2eeee7542900000000000ae988 XMM05=a6b22c1341c4c0290000000000135118 XMM06=bdf2e299e47b49d50000000000133e48 XMM07=fb795ef6d65770560000000000123530 XMM08=2c67c8bc2e329bc3000000000011e3e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e60 RDI=ffff88806cf09aa8 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137008 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff81131039 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 00007f1a557a9900 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=00007f1a55d60618 CR3=000000000ece8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000