syzkaller login: [ 31.227192] BUG: Bad rss-counter state mm:0000000051cd90d4 type:MM_FILEPAGES val:33 [ 31.228405] BUG: Bad rss-counter state mm:0000000051cd90d4 type:MM_ANONPAGES val:22 [ 31.367922] ================================================================== [ 31.368832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.369793] Read of size 8 at addr ffff88800f1fec20 by task sshd/219 [ 31.370567] [ 31.370792] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.371831] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.372803] Call Trace: [ 31.373125] [ 31.373435] dump_stack_lvl+0x91/0xf0 [ 31.373928] print_report+0xcc/0x620 [ 31.374419] ? __virt_addr_valid+0x102/0x340 [ 31.374978] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.375612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.376231] kasan_report+0xbe/0xf0 [ 31.376713] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377349] vma_interval_tree_remove+0xc75/0xec0 [ 31.377949] vma_prepare+0xc54/0x11a0 [ 31.378438] __split_vma+0x5af/0x950 [ 31.378919] ? __pfx___split_vma+0x10/0x10 [ 31.379448] ? find_held_lock+0x2c/0x110 [ 31.379985] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.380561] ? lock_is_held_type+0x9f/0x120 [ 31.381114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.381739] ? mtree_range_walk+0x632/0x900 [ 31.382308] ? mas_walk+0x5c7/0x7c0 [ 31.382790] do_vmi_munmap+0x1f1/0x2b0 [ 31.383297] mmap_region+0x1f9/0x2660 [ 31.383786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.384314] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.385025] ? __pfx_lock_acquire+0x10/0x10 [ 31.385603] ? __pfx_mmap_region+0x10/0x10 [ 31.386139] ? security_mmap_addr+0x7d/0xa0 [ 31.386680] ? get_unmapped_area+0x1f5/0x3f0 [ 31.387240] do_mmap+0x854/0xf00 [ 31.387686] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.388202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.388780] ksys_mmap_pgoff+0x3af/0x500 [ 31.389324] do_syscall_64+0x3f/0x90 [ 31.389803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.390447] RIP: 0033:0x7f975512ad82 [ 31.390927] 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 [ 31.393117] RSP: 002b:00007fff12211a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.394076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f975512ad82 [ 31.394950] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9754564000 [ 31.395836] RBP: 00007f9754564000 R08: 0000000000000009 R09: 0000000000001000 [ 31.396713] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564732a4dec0 [ 31.397590] R13: 00007fff12211a40 R14: 00007fff12211a70 R15: 00007fff12211dd0 [ 31.398458] [ 31.398760] [ 31.398979] Allocated by task 212: [ 31.399421] kasan_save_stack+0x22/0x50 [ 31.399946] kasan_set_track+0x25/0x30 [ 31.400453] __kasan_slab_alloc+0x59/0x70 [ 31.400993] kmem_cache_alloc+0x16b/0x370 [ 31.401528] vm_area_dup+0x20/0x160 [ 31.401984] __split_vma+0x170/0x950 [ 31.402456] split_vma+0xc6/0x110 [ 31.402903] mprotect_fixup+0x8d2/0xb30 [ 31.403410] do_mprotect_pkey+0x87e/0xd40 [ 31.403938] __x64_sys_mprotect+0x78/0xc0 [ 31.404487] do_syscall_64+0x3f/0x90 [ 31.404978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.405662] [ 31.405888] Freed by task 212: [ 31.406298] kasan_save_stack+0x22/0x50 [ 31.406802] kasan_set_track+0x25/0x30 [ 31.407311] kasan_save_free_info+0x2b/0x50 [ 31.407855] __kasan_slab_free+0x10a/0x190 [ 31.408398] kmem_cache_free+0x10d/0x4d0 [ 31.408930] rcu_core+0x8c8/0x2860 [ 31.409386] __do_softirq+0x1b7/0x7d4 [ 31.409863] [ 31.410078] Last potentially related work creation: [ 31.410676] kasan_save_stack+0x22/0x50 [ 31.411189] __kasan_record_aux_stack+0x8e/0xa0 [ 31.411771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.412420] remove_vma+0x139/0x170 [ 31.412968] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.413547] do_vmi_munmap+0x1f1/0x2b0 [ 31.414047] __vm_munmap+0x138/0x3a0 [ 31.414514] __x64_sys_munmap+0x59/0x80 [ 31.415013] do_syscall_64+0x3f/0x90 [ 31.415491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.416144] [ 31.416364] Second to last potentially related work creation: [ 31.417104] kasan_save_stack+0x22/0x50 [ 31.417637] __kasan_record_aux_stack+0x8e/0xa0 [ 31.418250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.418925] remove_vma+0x139/0x170 [ 31.419392] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.419974] do_vmi_munmap+0x1f1/0x2b0 [ 31.420479] mmap_region+0x1f9/0x2660 [ 31.420961] do_mmap+0x854/0xf00 [ 31.421409] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.421904] ksys_mmap_pgoff+0x3af/0x500 [ 31.422418] do_syscall_64+0x3f/0x90 [ 31.422914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.423579] [ 31.423796] The buggy address belongs to the object at ffff88800f1febc8 [ 31.423796] which belongs to the cache vm_area_struct of size 168 [ 31.425335] The buggy address is located 88 bytes inside of [ 31.425335] freed 168-byte region [ffff88800f1febc8, ffff88800f1fec70) [ 31.426751] [ 31.426969] The buggy address belongs to the physical page: [ 31.427629] page:00000000e362fe49 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1fe [ 31.428723] memcg:ffff8880180d3101 [ 31.429150] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.429809] page_type: 0xffffffff() [ 31.430273] raw: 0100000000000200 ffff88800879fc80 ffffea0000371540 dead000000000008 [ 31.431201] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180d3101 [ 31.432108] page dumped because: kasan: bad access detected [ 31.432773] [ 31.432992] Memory state around the buggy address: [ 31.433582] ffff88800f1feb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.434441] ffff88800f1feb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.435302] >ffff88800f1fec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.436155] ^ [ 31.436686] ffff88800f1fec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.437623] ffff88800f1fed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.438510] ================================================================== [ 31.439453] Disabling lock debugging due to kernel taint [ 33.808996] BUG: Bad rss-counter state mm:00000000144e9387 type:MM_FILEPAGES val:33 [ 33.810188] BUG: Bad rss-counter state mm:00000000144e9387 type:MM_ANONPAGES val:22 [ 34.295412] BUG: Bad rss-counter state mm:0000000068567e72 type:MM_FILEPAGES val:33 [ 34.296572] BUG: Bad rss-counter state mm:0000000068567e72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25833' (ECDSA) to the list of known hosts. 2023/06/20 06:31:03 fuzzer started 2023/06/20 06:31:03 dialing manager at localhost:44161 2023/06/20 06:31:03 checking machine... 2023/06/20 06:31:03 checking revisions... [ 35.011381] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:31:03 testing simple program... [ 35.062770] cgroup: Unknown subsys name 'net' [ 35.125197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe629c4a18 CR3=0000000019f1c000 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=2032303a31333a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31333a3630203032 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=0000000000000001 RDX=ffff88800fc8f701 RSI=ffff88800fc8f760 RDI=ffff88800fc8f760 RBP=ffff88800fc8f4e8 RSP=ffff88800fc8f420 R8 =0000000000000001 R9 =ffff88800fc8f4d0 R10=0000000000038001 R11=0000000000020c50 R12=ffff88800fc8f4f0 R13=ffff88800fc8f4d8 R14=ffff88800fc8f760 R15=ffff88800fc8f490 RIP=ffffffff81131236 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 00007fc8803e3900 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=00007fc88099a618 CR3=0000000019e20000 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