syzkaller login: [ 31.070742] BUG: Bad rss-counter state mm:00000000e5d94875 type:MM_FILEPAGES val:33 [ 31.071744] BUG: Bad rss-counter state mm:00000000e5d94875 type:MM_ANONPAGES val:22 [ 31.237866] ================================================================== [ 31.239130] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.240365] Read of size 8 at addr ffff888016518968 by task sshd/221 [ 31.241412] [ 31.241699] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.242841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.244131] Call Trace: [ 31.244587] [ 31.244960] dump_stack_lvl+0x91/0xf0 [ 31.245611] print_report+0xcc/0x620 [ 31.246249] ? __virt_addr_valid+0x102/0x340 [ 31.246978] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247813] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.248676] kasan_report+0xbe/0xf0 [ 31.249316] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250130] vma_interval_tree_remove+0xc75/0xec0 [ 31.250928] vma_prepare+0xc54/0x11a0 [ 31.251573] __split_vma+0x5af/0x950 [ 31.252209] ? __pfx___split_vma+0x10/0x10 [ 31.252867] ? find_held_lock+0x2c/0x110 [ 31.253437] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.254042] ? lock_is_held_type+0x9f/0x120 [ 31.254621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.255260] ? mtree_range_walk+0x632/0x900 [ 31.255825] ? mas_walk+0x5c7/0x7c0 [ 31.256362] do_vmi_munmap+0x1f1/0x2b0 [ 31.256878] mmap_region+0x1f9/0x2660 [ 31.257392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.257919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.258677] ? __pfx_lock_acquire+0x10/0x10 [ 31.259262] ? __pfx_mmap_region+0x10/0x10 [ 31.259836] ? security_mmap_addr+0x7d/0xa0 [ 31.260415] ? get_unmapped_area+0x1f5/0x3f0 [ 31.260975] do_mmap+0x854/0xf00 [ 31.261439] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.261955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.262552] ksys_mmap_pgoff+0x3af/0x500 [ 31.263109] do_syscall_64+0x3f/0x90 [ 31.263613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264328] RIP: 0033:0x7ff17a137d82 [ 31.264828] 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 [ 31.267035] RSP: 002b:00007ffe57b32228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.267981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff17a137d82 [ 31.268872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff179571000 [ 31.269776] RBP: 00007ff179571000 R08: 0000000000000009 R09: 0000000000001000 [ 31.270647] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a05683bd90 [ 31.271542] R13: 00007ffe57b32240 R14: 00007ffe57b32270 R15: 00007ffe57b325d0 [ 31.272458] [ 31.272757] [ 31.272981] Allocated by task 214: [ 31.273442] kasan_save_stack+0x22/0x50 [ 31.273956] kasan_set_track+0x25/0x30 [ 31.274481] __kasan_slab_alloc+0x59/0x70 [ 31.275025] kmem_cache_alloc+0x16b/0x370 [ 31.275577] vm_area_dup+0x20/0x160 [ 31.276054] __split_vma+0x170/0x950 [ 31.276605] split_vma+0xc6/0x110 [ 31.277056] mprotect_fixup+0x8d2/0xb30 [ 31.277559] do_mprotect_pkey+0x87e/0xd40 [ 31.278078] __x64_sys_mprotect+0x78/0xc0 [ 31.278640] do_syscall_64+0x3f/0x90 [ 31.279134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279771] [ 31.279986] Freed by task 214: [ 31.280405] kasan_save_stack+0x22/0x50 [ 31.280912] kasan_set_track+0x25/0x30 [ 31.281406] kasan_save_free_info+0x2b/0x50 [ 31.281941] __kasan_slab_free+0x10a/0x190 [ 31.282479] kmem_cache_free+0x10d/0x4d0 [ 31.282981] rcu_core+0x8c8/0x2860 [ 31.283421] __do_softirq+0x1b7/0x7d4 [ 31.283919] [ 31.284133] Last potentially related work creation: [ 31.284735] kasan_save_stack+0x22/0x50 [ 31.285233] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.286450] remove_vma+0x139/0x170 [ 31.286907] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.287460] do_vmi_munmap+0x1f1/0x2b0 [ 31.287935] __vm_munmap+0x138/0x3a0 [ 31.288410] __x64_sys_munmap+0x59/0x80 [ 31.288894] do_syscall_64+0x3f/0x90 [ 31.289412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290068] [ 31.290281] The buggy address belongs to the object at ffff888016518910 [ 31.290281] which belongs to the cache vm_area_struct of size 168 [ 31.291730] The buggy address is located 88 bytes inside of [ 31.291730] freed 168-byte region [ffff888016518910, ffff8880165189b8) [ 31.293148] [ 31.293364] The buggy address belongs to the physical page: [ 31.294016] page:00000000da6ead86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16518 [ 31.295107] memcg:ffff888010317801 [ 31.295562] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.296218] page_type: 0xffffffff() [ 31.296705] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.297661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010317801 [ 31.298601] page dumped because: kasan: bad access detected [ 31.299314] [ 31.299529] Memory state around the buggy address: [ 31.300128] ffff888016518800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.301032] ffff888016518880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.301907] >ffff888016518900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.302799] ^ [ 31.303609] ffff888016518980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.304513] ffff888016518a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.305397] ================================================================== [ 31.306503] Disabling lock debugging due to kernel taint [ 33.094684] BUG: Bad rss-counter state mm:00000000204a9c0a type:MM_FILEPAGES val:33 [ 33.096319] BUG: Bad rss-counter state mm:00000000204a9c0a type:MM_ANONPAGES val:22 [ 33.458311] BUG: Bad rss-counter state mm:000000006ece436e type:MM_FILEPAGES val:33 [ 33.458929] BUG: Bad rss-counter state mm:000000006ece436e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7607' (ECDSA) to the list of known hosts. 2023/06/20 14:21:39 fuzzer started 2023/06/20 14:21:39 dialing manager at localhost:36067 2023/06/20 14:21:39 checking machine... 2023/06/20 14:21:39 checking revisions... [ 34.174907] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:21:39 testing simple program... [ 34.216391] cgroup: Unknown subsys name 'net' [ 34.257828] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:21:39 Registers: info registers vcpu 0 RAX=1ffff110031b7e40 RBX=ffff888018dbf41c RCX=0000000000000000 RDX=ffff8880198bd1c0 RSI=dffffc0000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016aa7ce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888015ef12c0 R14=0000000000000000 R15=00007fcce0c72fff RIP=ffffffff844a4fa9 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcce0c3e900 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=000055c4433ba654 CR3=000000000d5b8000 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=0000000000000000000055c4417fb060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd091b26c8 CR3=0000000018e14000 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=2038333a31323a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a31323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000