syzkaller login: [ 32.172261] BUG: Bad rss-counter state mm:000000003cf0e20b type:MM_FILEPAGES val:33 [ 32.174121] BUG: Bad rss-counter state mm:000000003cf0e20b type:MM_ANONPAGES val:22 [ 32.341576] ================================================================== [ 32.342626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.343805] Read of size 8 at addr ffff88800e98bc20 by task sshd/221 [ 32.344676] [ 32.344919] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.345931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.347010] Call Trace: [ 32.347365] [ 32.347682] dump_stack_lvl+0x91/0xf0 [ 32.348257] print_report+0xcc/0x620 [ 32.348796] ? __virt_addr_valid+0x102/0x340 [ 32.349406] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.350132] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.350818] kasan_report+0xbe/0xf0 [ 32.351343] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.352050] vma_interval_tree_remove+0xc75/0xec0 [ 32.352749] vma_prepare+0xc54/0x11a0 [ 32.353299] __split_vma+0x5af/0x950 [ 32.353882] ? __pfx___split_vma+0x10/0x10 [ 32.354486] ? find_held_lock+0x2c/0x110 [ 32.355079] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.355721] ? lock_is_held_type+0x9f/0x120 [ 32.356346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.357033] ? mtree_range_walk+0x632/0x900 [ 32.357690] ? mas_walk+0x5c7/0x7c0 [ 32.358247] do_vmi_munmap+0x1f1/0x2b0 [ 32.358817] mmap_region+0x1f9/0x2660 [ 32.359374] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.359955] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.360804] ? __pfx_lock_acquire+0x10/0x10 [ 32.361414] ? __pfx_mmap_region+0x10/0x10 [ 32.362055] ? security_mmap_addr+0x7d/0xa0 [ 32.362665] ? get_unmapped_area+0x1f5/0x3f0 [ 32.363287] do_mmap+0x854/0xf00 [ 32.363774] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.364347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.364968] ksys_mmap_pgoff+0x3af/0x500 [ 32.365535] do_syscall_64+0x3f/0x90 [ 32.366108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.366823] RIP: 0033:0x7fafdb08fd82 [ 32.367334] 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 [ 32.369737] RSP: 002b:00007ffffe205178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.370772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafdb08fd82 [ 32.371738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafda4c9000 [ 32.372736] RBP: 00007fafda4c9000 R08: 0000000000000009 R09: 0000000000001000 [ 32.373735] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d8279dec0 [ 32.374704] R13: 00007ffffe205190 R14: 00007ffffe2051c0 R15: 00007ffffe205520 [ 32.375685] [ 32.376013] [ 32.376280] Allocated by task 214: [ 32.376768] kasan_save_stack+0x22/0x50 [ 32.377350] kasan_set_track+0x25/0x30 [ 32.377955] __kasan_slab_alloc+0x59/0x70 [ 32.378559] kmem_cache_alloc+0x16b/0x370 [ 32.379145] vm_area_dup+0x20/0x160 [ 32.379667] __split_vma+0x170/0x950 [ 32.380213] split_vma+0xc6/0x110 [ 32.380715] mprotect_fixup+0x8d2/0xb30 [ 32.381288] do_mprotect_pkey+0x87e/0xd40 [ 32.381922] __x64_sys_mprotect+0x78/0xc0 [ 32.382529] do_syscall_64+0x3f/0x90 [ 32.383066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.383804] [ 32.384047] Freed by task 214: [ 32.384601] kasan_save_stack+0x22/0x50 [ 32.385177] kasan_set_track+0x25/0x30 [ 32.385786] kasan_save_free_info+0x2b/0x50 [ 32.386395] __kasan_slab_free+0x10a/0x190 [ 32.387002] kmem_cache_free+0x10d/0x4d0 [ 32.387581] rcu_core+0x8c8/0x2860 [ 32.388086] __do_softirq+0x1b7/0x7d4 [ 32.388653] [ 32.388895] Last potentially related work creation: [ 32.389545] kasan_save_stack+0x22/0x50 [ 32.390156] __kasan_record_aux_stack+0x8e/0xa0 [ 32.390798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.391529] remove_vma+0x139/0x170 [ 32.392032] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.392679] do_vmi_munmap+0x1f1/0x2b0 [ 32.393225] __vm_munmap+0x138/0x3a0 [ 32.393790] __x64_sys_munmap+0x59/0x80 [ 32.394338] do_syscall_64+0x3f/0x90 [ 32.394862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.395567] [ 32.395808] Second to last potentially related work creation: [ 32.396598] kasan_save_stack+0x22/0x50 [ 32.397158] __kasan_record_aux_stack+0x8e/0xa0 [ 32.397831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.398547] remove_vma+0x139/0x170 [ 32.399049] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.399668] do_vmi_munmap+0x1f1/0x2b0 [ 32.400228] mmap_region+0x1f9/0x2660 [ 32.400754] do_mmap+0x854/0xf00 [ 32.401227] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.401821] ksys_mmap_pgoff+0x3af/0x500 [ 32.402401] do_syscall_64+0x3f/0x90 [ 32.402934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.403663] [ 32.403907] The buggy address belongs to the object at ffff88800e98bbc8 [ 32.403907] which belongs to the cache vm_area_struct of size 168 [ 32.405606] The buggy address is located 88 bytes inside of [ 32.405606] freed 168-byte region [ffff88800e98bbc8, ffff88800e98bc70) [ 32.407235] [ 32.407483] The buggy address belongs to the physical page: [ 32.408253] page:00000000f33e7b48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe98b [ 32.409480] memcg:ffff88800e3f1501 [ 32.410005] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.410740] page_type: 0xffffffff() [ 32.411254] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.412320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3f1501 [ 32.413366] page dumped because: kasan: bad access detected [ 32.414173] [ 32.414420] Memory state around the buggy address: [ 32.415081] ffff88800e98bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.416056] ffff88800e98bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.417055] >ffff88800e98bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.418062] ^ [ 32.418669] ffff88800e98bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.419639] ffff88800e98bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.420621] ================================================================== [ 32.421760] Disabling lock debugging due to kernel taint [ 34.579746] BUG: Bad rss-counter state mm:00000000608b4a6e type:MM_FILEPAGES val:33 [ 34.580777] BUG: Bad rss-counter state mm:00000000608b4a6e type:MM_ANONPAGES val:22 [ 35.055963] BUG: Bad rss-counter state mm:000000002d435ee3 type:MM_FILEPAGES val:33 [ 35.057140] BUG: Bad rss-counter state mm:000000002d435ee3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1689' (ECDSA) to the list of known hosts. 2023/06/20 02:27:28 fuzzer started 2023/06/20 02:27:29 dialing manager at localhost:44161 2023/06/20 02:27:29 checking machine... 2023/06/20 02:27:29 checking revisions... [ 35.711383] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:27:29 testing simple program... [ 35.751966] cgroup: Unknown subsys name 'net' [ 35.792084] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:27:25 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=00007ffddb9aaa68 CR3=000000000edf2000 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=2038323a37323a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a37323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f132e08bf00 CR3=000000000c6be000 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=095933c750e4afa7614a6244eb5756b1 XMM02=2c67c8bc2e329bc3000000000011b718 XMM03=fb795ef6d65770560000000000122af0 XMM04=9bce9310450fe2e400000000000ae988 XMM05=59d5b690e0af863b00000000001341a8 XMM06=10a6722368031ceb00000000001328a8 XMM07=e042d86d42eb936e0000000000122d70 XMM08=87d7f23886f34a16000000000011b778 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000