syzkaller login: [ 30.321393] BUG: Bad rss-counter state mm:00000000a04551fd type:MM_FILEPAGES val:33 [ 30.322716] BUG: Bad rss-counter state mm:00000000a04551fd type:MM_ANONPAGES val:22 [ 30.486696] ================================================================== [ 30.487602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.488579] Read of size 8 at addr ffff888009d6f880 by task sshd/221 [ 30.489350] [ 30.489567] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.490451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.491430] Call Trace: [ 30.491749] [ 30.492039] dump_stack_lvl+0x91/0xf0 [ 30.492537] print_report+0xcc/0x620 [ 30.493021] ? __virt_addr_valid+0x102/0x340 [ 30.493570] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.494211] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.494834] kasan_report+0xbe/0xf0 [ 30.495309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.495934] vma_interval_tree_remove+0xc75/0xec0 [ 30.496538] vma_prepare+0xc54/0x11a0 [ 30.497016] __split_vma+0x5af/0x950 [ 30.497490] ? __pfx___split_vma+0x10/0x10 [ 30.498025] ? find_held_lock+0x2c/0x110 [ 30.498545] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.499113] ? lock_is_held_type+0x9f/0x120 [ 30.499658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.500262] ? mtree_range_walk+0x632/0x900 [ 30.500818] ? mas_walk+0x5c7/0x7c0 [ 30.501294] do_vmi_munmap+0x1f1/0x2b0 [ 30.501817] mmap_region+0x1f9/0x2660 [ 30.502307] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.502817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.503529] ? __pfx_lock_acquire+0x10/0x10 [ 30.504058] ? __pfx_mmap_region+0x10/0x10 [ 30.504588] ? security_mmap_addr+0x7d/0xa0 [ 30.505123] ? get_unmapped_area+0x1f5/0x3f0 [ 30.505682] do_mmap+0x854/0xf00 [ 30.506121] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.506613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.507181] ksys_mmap_pgoff+0x3af/0x500 [ 30.507690] do_syscall_64+0x3f/0x90 [ 30.508168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.508814] RIP: 0033:0x7f72ba718d82 [ 30.509277] 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 [ 30.511426] RSP: 002b:00007fff40f693d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.512387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72ba718d82 [ 30.513301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72b9b52000 [ 30.514218] RBP: 00007f72b9b52000 R08: 0000000000000009 R09: 0000000000001000 [ 30.515142] R10: 0000000000000812 R11: 0000000000000206 R12: 000055629299dec0 [ 30.516057] R13: 00007fff40f693f0 R14: 00007fff40f69420 R15: 00007fff40f69780 [ 30.516984] [ 30.517309] [ 30.517552] Allocated by task 214: [ 30.518041] kasan_save_stack+0x22/0x50 [ 30.518620] kasan_set_track+0x25/0x30 [ 30.519155] __kasan_slab_alloc+0x59/0x70 [ 30.519713] kmem_cache_alloc+0x16b/0x370 [ 30.520270] vm_area_dup+0x20/0x160 [ 30.520760] __split_vma+0x170/0x950 [ 30.521264] split_vma+0xc6/0x110 [ 30.521768] mprotect_fixup+0x8d2/0xb30 [ 30.522307] do_mprotect_pkey+0x87e/0xd40 [ 30.522866] __x64_sys_mprotect+0x78/0xc0 [ 30.523430] do_syscall_64+0x3f/0x90 [ 30.523943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.524642] [ 30.524876] Freed by task 211: [ 30.525298] kasan_save_stack+0x22/0x50 [ 30.525855] kasan_set_track+0x25/0x30 [ 30.526389] kasan_save_free_info+0x2b/0x50 [ 30.526964] __kasan_slab_free+0x10a/0x190 [ 30.527547] kmem_cache_free+0x10d/0x4d0 [ 30.528101] rcu_core+0x8c8/0x2860 [ 30.528576] __do_softirq+0x1b7/0x7d4 [ 30.529094] [ 30.529328] Last potentially related work creation: [ 30.529988] kasan_save_stack+0x22/0x50 [ 30.530532] __kasan_record_aux_stack+0x8e/0xa0 [ 30.531148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.531843] remove_vma+0x139/0x170 [ 30.532337] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.532938] do_vmi_munmap+0x1f1/0x2b0 [ 30.533455] __vm_munmap+0x138/0x3a0 [ 30.533972] __x64_sys_munmap+0x59/0x80 [ 30.534507] do_syscall_64+0x3f/0x90 [ 30.535018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.535710] [ 30.535941] The buggy address belongs to the object at ffff888009d6f828 [ 30.535941] which belongs to the cache vm_area_struct of size 168 [ 30.537533] The buggy address is located 88 bytes inside of [ 30.537533] freed 168-byte region [ffff888009d6f828, ffff888009d6f8d0) [ 30.539081] [ 30.539312] The buggy address belongs to the physical page: [ 30.540033] page:00000000347e6a3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d6f [ 30.541228] memcg:ffff888018e5e401 [ 30.541730] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.542429] page_type: 0xffffffff() [ 30.542911] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.543925] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e5e401 [ 30.544913] page dumped because: kasan: bad access detected [ 30.545643] [ 30.545870] Memory state around the buggy address: [ 30.546508] ffff888009d6f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.547439] ffff888009d6f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.548363] >ffff888009d6f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.549291] ^ [ 30.549746] ffff888009d6f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.550683] ffff888009d6f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.551613] ================================================================== [ 30.552741] Disabling lock debugging due to kernel taint [ 32.512303] BUG: Bad rss-counter state mm:000000000c5d2914 type:MM_FILEPAGES val:33 [ 32.513889] BUG: Bad rss-counter state mm:000000000c5d2914 type:MM_ANONPAGES val:22 [ 33.064839] BUG: Bad rss-counter state mm:00000000c6f02915 type:MM_FILEPAGES val:33 [ 33.066037] BUG: Bad rss-counter state mm:00000000c6f02915 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20981' (ECDSA) to the list of known hosts. 2023/06/21 02:37:13 fuzzer started 2023/06/21 02:37:13 dialing manager at localhost:36067 2023/06/21 02:37:13 checking machine... 2023/06/21 02:37:13 checking revisions... [ 33.717427] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:37:13 testing simple program... [ 33.761637] cgroup: Unknown subsys name 'net' [ 33.819353] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:37:13 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=00007f739fbea8c0 CR3=000000000f236000 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=c50d3ac1c435a5b2ee4aaa9e69cb9a4a XMM02=eff9b2d0a8fce9cb000000000011d2a0 XMM03=2c67c8bc2e329bc3000000000011d3c8 XMM04=808b441dc0a2630a00000000000ae988 XMM05=3be6a06ce3e4aae80000000000132948 XMM06=c291bd5c70af25b90000000000131738 XMM07=fb795ef6d65770560000000000121a90 XMM08=2c67c8bc2e329bc3000000000011d3c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015cf8000 RSI=ffffffff81711013 RDI=0000000000000005 RBP=ffff888019aafd90 RSP=ffff888019aafbf8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=ffffea00006d0380 R13=ffff888019bfd000 R14=ffff888019aafdb8 R15=ffffea00006d03b4 RIP=ffffffff814c089b 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 00007f3dbfbac900 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=00007ffc877005ec CR3=0000000015c28000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=650822a2a3d99a246a152d24676ba272 XMM05=000000000000000000000000000000ff XMM06=650822a2a33c9a246a1522242d6b6100 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000