[ 31.109367] BUG: Bad rss-counter state mm:00000000a8ef9bbc type:MM_FILEPAGES val:33 [ 31.110814] BUG: Bad rss-counter state mm:00000000a8ef9bbc type:MM_ANONPAGES val:22 [ 31.214787] ================================================================== [ 31.215771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.216785] Read of size 8 at addr ffff88800e6b16b0 by task sshd/219 [ 31.217585] [ 31.217814] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.218881] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.219937] Call Trace: [ 31.220291] [ 31.220620] dump_stack_lvl+0x91/0xf0 [ 31.221139] print_report+0xcc/0x620 [ 31.221650] ? __virt_addr_valid+0x102/0x340 [ 31.222231] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222884] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223534] kasan_report+0xbe/0xf0 [ 31.224033] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.224668] vma_interval_tree_remove+0xc75/0xec0 [ 31.225287] vma_prepare+0xc54/0x11a0 [ 31.225766] __split_vma+0x5af/0x950 [ 31.226241] ? __pfx___split_vma+0x10/0x10 [ 31.226783] ? find_held_lock+0x2c/0x110 [ 31.227321] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.227886] ? lock_is_held_type+0x9f/0x120 [ 31.228422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.229039] ? mtree_range_walk+0x632/0x900 [ 31.229596] ? mas_walk+0x5c7/0x7c0 [ 31.230070] do_vmi_munmap+0x1f1/0x2b0 [ 31.230568] mmap_region+0x1f9/0x2660 [ 31.231063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.231583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.232294] ? __pfx_lock_acquire+0x10/0x10 [ 31.232848] ? __pfx_mmap_region+0x10/0x10 [ 31.233374] ? security_mmap_addr+0x7d/0xa0 [ 31.233908] ? get_unmapped_area+0x1f5/0x3f0 [ 31.234463] do_mmap+0x854/0xf00 [ 31.234897] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.235394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.235952] ksys_mmap_pgoff+0x3af/0x500 [ 31.236456] do_syscall_64+0x3f/0x90 [ 31.236946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237604] RIP: 0033:0x7f25bd2fdd82 [ 31.238061] 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 [ 31.240192] RSP: 002b:00007ffc46256f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.241122] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25bd2fdd82 [ 31.241975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25bc737000 [ 31.242815] RBP: 00007f25bc737000 R08: 0000000000000009 R09: 0000000000001000 [ 31.243663] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636a8ec6f70 [ 31.244509] R13: 00007ffc46256f30 R14: 00007ffc46256f60 R15: 00007ffc462572c0 [ 31.245380] [ 31.245673] [ 31.245888] Allocated by task 212: [ 31.246316] kasan_save_stack+0x22/0x50 [ 31.246815] kasan_set_track+0x25/0x30 [ 31.247307] __kasan_slab_alloc+0x59/0x70 [ 31.247829] kmem_cache_alloc+0x16b/0x370 [ 31.248343] vm_area_dup+0x20/0x160 [ 31.248817] __split_vma+0x170/0x950 [ 31.249285] split_vma+0xc6/0x110 [ 31.249724] mprotect_fixup+0x8d2/0xb30 [ 31.250226] do_mprotect_pkey+0x87e/0xd40 [ 31.250745] __x64_sys_mprotect+0x78/0xc0 [ 31.251266] do_syscall_64+0x3f/0x90 [ 31.251737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252380] [ 31.252602] Freed by task 212: [ 31.252994] kasan_save_stack+0x22/0x50 [ 31.253500] kasan_set_track+0x25/0x30 [ 31.254001] kasan_save_free_info+0x2b/0x50 [ 31.254535] __kasan_slab_free+0x10a/0x190 [ 31.255068] kmem_cache_free+0x10d/0x4d0 [ 31.255576] rcu_core+0x8c8/0x2860 [ 31.256018] __do_softirq+0x1b7/0x7d4 [ 31.256496] [ 31.256717] Last potentially related work creation: [ 31.257300] kasan_save_stack+0x22/0x50 [ 31.257810] __kasan_record_aux_stack+0x8e/0xa0 [ 31.258380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.259024] remove_vma+0x139/0x170 [ 31.259471] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.260095] do_vmi_munmap+0x1f1/0x2b0 [ 31.260589] __vm_munmap+0x138/0x3a0 [ 31.261058] __x64_sys_munmap+0x59/0x80 [ 31.261554] do_syscall_64+0x3f/0x90 [ 31.262034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262678] [ 31.262892] Second to last potentially related work creation: [ 31.263576] kasan_save_stack+0x22/0x50 [ 31.264081] __kasan_record_aux_stack+0x8e/0xa0 [ 31.264660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.265309] remove_vma+0x139/0x170 [ 31.265766] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.266335] do_vmi_munmap+0x1f1/0x2b0 [ 31.266819] mmap_region+0x1f9/0x2660 [ 31.267297] do_mmap+0x854/0xf00 [ 31.267728] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.268212] ksys_mmap_pgoff+0x3af/0x500 [ 31.268726] do_syscall_64+0x3f/0x90 [ 31.269204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269844] [ 31.270059] The buggy address belongs to the object at ffff88800e6b1658 [ 31.270059] which belongs to the cache vm_area_struct of size 168 [ 31.271528] The buggy address is located 88 bytes inside of [ 31.271528] freed 168-byte region [ffff88800e6b1658, ffff88800e6b1700) [ 31.272931] [ 31.273149] The buggy address belongs to the physical page: [ 31.273816] page:00000000ed87e221 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6b1 [ 31.274903] memcg:ffff88800eeaaa01 [ 31.275334] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.276031] page_type: 0xffffffff() [ 31.276483] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.277403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeaaa01 [ 31.278319] page dumped because: kasan: bad access detected [ 31.278976] [ 31.279191] Memory state around the buggy address: [ 31.279776] ffff88800e6b1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.280647] ffff88800e6b1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.281508] >ffff88800e6b1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.282361] ^ [ 31.282941] ffff88800e6b1700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.283794] ffff88800e6b1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.284654] ================================================================== Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.286406] Disabling lock debugging due to kernel taint [ 34.067928] BUG: Bad rss-counter state mm:000000008e1d3a6a type:MM_FILEPAGES val:33 [ 34.068958] BUG: Bad rss-counter state mm:000000008e1d3a6a type:MM_ANONPAGES val:22 [ 34.607313] BUG: Bad rss-counter state mm:000000003ae443ca type:MM_FILEPAGES val:33 [ 34.608541] BUG: Bad rss-counter state mm:000000003ae443ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21762' (ECDSA) to the list of known hosts. 2023/06/21 01:50:14 fuzzer started 2023/06/21 01:50:14 dialing manager at localhost:36067 2023/06/21 01:50:14 checking machine... 2023/06/21 01:50:14 checking revisions... [ 35.296799] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:50:14 testing simple program... [ 35.342916] cgroup: Unknown subsys name 'net' [ 35.392699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:50:14 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=00007f6b18400338 CR3=000000000e0bc000 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=2033313a30353a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a30353a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016e8f2b0 RSP=ffff888016e8f1e8 R8 =ffffffff86138e90 R9 =ffff888016e8f298 R10=0000000000038001 R11=0000000000020d8f R12=ffff888016e8f2b8 R13=ffff888016e8f2a0 R14=ffff888016e8f299 R15=ffff888016e8f258 RIP=ffffffff81130ad6 RFL=00000246 [---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 00007fd02c865900 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=00007fd02ce1c618 CR3=0000000016edc000 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