Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.020124] BUG: Bad rss-counter state mm:00000000ae327a87 type:MM_FILEPAGES val:33 [ 31.021759] BUG: Bad rss-counter state mm:00000000ae327a87 type:MM_ANONPAGES val:22 [ 31.192113] ================================================================== [ 31.193037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.193995] Read of size 8 at addr ffff888009693df0 by task sshd/219 [ 31.194881] [ 31.195113] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.195994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.196980] Call Trace: [ 31.197307] [ 31.197600] dump_stack_lvl+0x91/0xf0 [ 31.198108] print_report+0xcc/0x620 [ 31.198606] ? __virt_addr_valid+0x102/0x340 [ 31.199181] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.199809] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.200431] kasan_report+0xbe/0xf0 [ 31.200911] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201534] vma_interval_tree_remove+0xc75/0xec0 [ 31.202142] vma_prepare+0xc54/0x11a0 [ 31.202627] __split_vma+0x5af/0x950 [ 31.203137] ? __pfx___split_vma+0x10/0x10 [ 31.203682] ? find_held_lock+0x2c/0x110 [ 31.204220] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.204797] ? lock_is_held_type+0x9f/0x120 [ 31.205345] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.205956] ? mtree_range_walk+0x632/0x900 [ 31.206522] ? mas_walk+0x5c7/0x7c0 [ 31.207003] do_vmi_munmap+0x1f1/0x2b0 [ 31.207515] mmap_region+0x1f9/0x2660 [ 31.208004] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.208512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.209229] ? __pfx_lock_acquire+0x10/0x10 [ 31.209758] ? __pfx_mmap_region+0x10/0x10 [ 31.210309] ? security_mmap_addr+0x7d/0xa0 [ 31.210851] ? get_unmapped_area+0x1f5/0x3f0 [ 31.211427] do_mmap+0x854/0xf00 [ 31.211886] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.212405] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.212971] ksys_mmap_pgoff+0x3af/0x500 [ 31.213494] do_syscall_64+0x3f/0x90 [ 31.213981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214644] RIP: 0033:0x7f9aade80d82 [ 31.215127] 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 [ 31.217282] RSP: 002b:00007ffd974c6868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.218192] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9aade80d82 [ 31.219061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9aad2ba000 [ 31.219922] RBP: 00007f9aad2ba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.220792] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557232fb8f70 [ 31.221652] R13: 00007ffd974c6880 R14: 00007ffd974c68b0 R15: 00007ffd974c6c10 [ 31.222518] [ 31.222819] [ 31.223063] Allocated by task 212: [ 31.223504] kasan_save_stack+0x22/0x50 [ 31.224017] kasan_set_track+0x25/0x30 [ 31.224526] __kasan_slab_alloc+0x59/0x70 [ 31.225050] kmem_cache_alloc+0x16b/0x370 [ 31.225571] vm_area_dup+0x20/0x160 [ 31.226039] __split_vma+0x170/0x950 [ 31.226520] split_vma+0xc6/0x110 [ 31.227079] mprotect_fixup+0x8d2/0xb30 [ 31.227718] do_mprotect_pkey+0x87e/0xd40 [ 31.228259] __x64_sys_mprotect+0x78/0xc0 [ 31.228810] do_syscall_64+0x3f/0x90 [ 31.229299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.229976] [ 31.230198] Freed by task 203: [ 31.230598] kasan_save_stack+0x22/0x50 [ 31.231144] kasan_set_track+0x25/0x30 [ 31.231644] kasan_save_free_info+0x2b/0x50 [ 31.232216] __kasan_slab_free+0x10a/0x190 [ 31.232784] kmem_cache_free+0x10d/0x4d0 [ 31.233308] rcu_core+0x8c8/0x2860 [ 31.233782] __do_softirq+0x1b7/0x7d4 [ 31.234267] [ 31.234488] Last potentially related work creation: [ 31.235087] kasan_save_stack+0x22/0x50 [ 31.235598] __kasan_record_aux_stack+0x8e/0xa0 [ 31.236179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.236823] remove_vma+0x139/0x170 [ 31.237280] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.237836] do_vmi_munmap+0x1f1/0x2b0 [ 31.238326] __vm_munmap+0x138/0x3a0 [ 31.238803] __x64_sys_munmap+0x59/0x80 [ 31.239350] do_syscall_64+0x3f/0x90 [ 31.239867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240484] [ 31.240687] Second to last potentially related work creation: [ 31.241333] kasan_save_stack+0x22/0x50 [ 31.241813] __kasan_record_aux_stack+0x8e/0xa0 [ 31.242354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.242962] remove_vma+0x139/0x170 [ 31.243413] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.243945] do_vmi_munmap+0x1f1/0x2b0 [ 31.244407] mmap_region+0x1f9/0x2660 [ 31.244859] do_mmap+0x854/0xf00 [ 31.245272] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.245732] ksys_mmap_pgoff+0x3af/0x500 [ 31.246210] do_syscall_64+0x3f/0x90 [ 31.246662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247282] [ 31.247490] The buggy address belongs to the object at ffff888009693d98 [ 31.247490] which belongs to the cache vm_area_struct of size 168 [ 31.248997] The buggy address is located 88 bytes inside of [ 31.248997] freed 168-byte region [ffff888009693d98, ffff888009693e40) [ 31.250437] [ 31.250657] The buggy address belongs to the physical page: [ 31.251346] page:000000006b4d2416 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9693 [ 31.252467] memcg:ffff88800e630701 [ 31.252904] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.253568] page_type: 0xffffffff() [ 31.254019] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bd400 dead000000000008 [ 31.254949] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e630701 [ 31.255887] page dumped because: kasan: bad access detected [ 31.256573] [ 31.256793] Memory state around the buggy address: [ 31.257403] ffff888009693c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.258303] ffff888009693d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.259214] >ffff888009693d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.260109] ^ [ 31.260959] ffff888009693e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.261852] ffff888009693e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.262757] ================================================================== [ 31.263797] Disabling lock debugging due to kernel taint [ 33.199975] BUG: Bad rss-counter state mm:00000000db91d592 type:MM_FILEPAGES val:33 [ 33.201257] BUG: Bad rss-counter state mm:00000000db91d592 type:MM_ANONPAGES val:22 [ 33.714801] BUG: Bad rss-counter state mm:0000000091ec5c37 type:MM_FILEPAGES val:33 [ 33.715975] BUG: Bad rss-counter state mm:0000000091ec5c37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25955' (ECDSA) to the list of known hosts. 2023/06/21 02:26:10 fuzzer started 2023/06/21 02:26:10 dialing manager at localhost:36067 2023/06/21 02:26:10 checking machine... 2023/06/21 02:26:10 checking revisions... [ 34.352122] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:26:10 testing simple program... [ 34.406382] cgroup: Unknown subsys name 'net' [ 34.475389] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:26:10 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=0000000000000001 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=00007ff77e4188a0 CR3=000000000d6ca000 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=557e65d9f57cb9950949544e284bf0b7 XMM02=000000000011b6f0ec2efd57dc4c00df XMM03=00000000001224b888838f9cb9b5a632 XMM04=a4ae3e7f49b5dd4500000000000ae988 XMM05=03e6a310627b8ae900000000001344e0 XMM06=806171799158d9670000000000133210 XMM07=e042d86d42eb936e0000000000122790 XMM08=88838f9cb9b5a632000000000011b750 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d9fa39 RBX=ffff88800ecfd198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ecfd1c8 RBP=ffff88800e349500 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800e2bdb80 R14=ffffffff813782f8 R15=ffff88800e2bdb80 RIP=ffffffff818464e2 RFL=00000046 [---Z-P-] 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 00007f2def772900 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=00007f2def751020 CR3=000000000db42000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000