syzkaller login: [ 38.791730] BUG: Bad rss-counter state mm:000000007dece270 type:MM_FILEPAGES val:33 [ 38.792853] BUG: Bad rss-counter state mm:000000007dece270 type:MM_ANONPAGES val:22 [ 38.997999] ================================================================== [ 38.998977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.999981] Read of size 8 at addr ffff88800ed6fb38 by task sshd/218 [ 39.000885] [ 39.001123] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.002034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.003112] Call Trace: [ 39.003448] [ 39.003757] dump_stack_lvl+0x91/0xf0 [ 39.004286] print_report+0xcc/0x620 [ 39.004801] ? __virt_addr_valid+0x102/0x340 [ 39.005387] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.006051] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.006722] kasan_report+0xbe/0xf0 [ 39.007236] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.007897] vma_interval_tree_remove+0xc75/0xec0 [ 39.008532] vma_prepare+0xc54/0x11a0 [ 39.009050] __split_vma+0x5af/0x950 [ 39.009563] ? __pfx___split_vma+0x10/0x10 [ 39.010127] ? find_held_lock+0x2c/0x110 [ 39.010672] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.011317] ? lock_is_held_type+0x9f/0x120 [ 39.011894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.012527] ? mtree_range_walk+0x632/0x900 [ 39.013115] ? mas_walk+0x5c7/0x7c0 [ 39.013617] do_vmi_munmap+0x1f1/0x2b0 [ 39.014139] mmap_region+0x1f9/0x2660 [ 39.014649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.015201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.015955] ? __pfx_lock_acquire+0x10/0x10 [ 39.016519] ? __pfx_mmap_region+0x10/0x10 [ 39.017080] ? security_mmap_addr+0x7d/0xa0 [ 39.017639] ? get_unmapped_area+0x1f5/0x3f0 [ 39.018219] do_mmap+0x854/0xf00 [ 39.018679] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.019221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.019813] ksys_mmap_pgoff+0x3af/0x500 [ 39.020346] do_syscall_64+0x3f/0x90 [ 39.020853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021533] RIP: 0033:0x7fe49d987d82 [ 39.022016] 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 [ 39.024265] RSP: 002b:00007ffc16b3e1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.025233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe49d987d82 [ 39.026143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe49cdc1000 [ 39.027051] RBP: 00007fe49cdc1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.027950] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffcb5c2ec0 [ 39.028849] R13: 00007ffc16b3e210 R14: 00007ffc16b3e240 R15: 00007ffc16b3e5a0 [ 39.029761] [ 39.030073] [ 39.030299] Allocated by task 211: [ 39.030767] kasan_save_stack+0x22/0x50 [ 39.031303] kasan_set_track+0x25/0x30 [ 39.031827] __kasan_slab_alloc+0x59/0x70 [ 39.032384] kmem_cache_alloc+0x16b/0x370 [ 39.032932] vm_area_dup+0x20/0x160 [ 39.033414] __split_vma+0x170/0x950 [ 39.033909] split_vma+0xc6/0x110 [ 39.034377] mprotect_fixup+0x8d2/0xb30 [ 39.034917] do_mprotect_pkey+0x87e/0xd40 [ 39.035471] __x64_sys_mprotect+0x78/0xc0 [ 39.036021] do_syscall_64+0x3f/0x90 [ 39.036529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.037214] [ 39.037441] Freed by task 211: [ 39.037860] kasan_save_stack+0x22/0x50 [ 39.038390] kasan_set_track+0x25/0x30 [ 39.038920] kasan_save_free_info+0x2b/0x50 [ 39.039482] __kasan_slab_free+0x10a/0x190 [ 39.040040] kmem_cache_free+0x10d/0x4d0 [ 39.040574] rcu_core+0x8c8/0x2860 [ 39.041041] __do_softirq+0x1b7/0x7d4 [ 39.041546] [ 39.041776] Last potentially related work creation: [ 39.042390] kasan_save_stack+0x22/0x50 [ 39.042933] __kasan_record_aux_stack+0x8e/0xa0 [ 39.043568] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.044241] remove_vma+0x139/0x170 [ 39.044716] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.045297] do_vmi_munmap+0x1f1/0x2b0 [ 39.045807] __vm_munmap+0x138/0x3a0 [ 39.046304] __x64_sys_munmap+0x59/0x80 [ 39.046832] do_syscall_64+0x3f/0x90 [ 39.047332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.048014] [ 39.048240] The buggy address belongs to the object at ffff88800ed6fae0 [ 39.048240] which belongs to the cache vm_area_struct of size 168 [ 39.049798] The buggy address is located 88 bytes inside of [ 39.049798] freed 168-byte region [ffff88800ed6fae0, ffff88800ed6fb88) [ 39.051301] [ 39.051527] The buggy address belongs to the physical page: [ 39.052221] page:000000005de47bc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed6f [ 39.053356] memcg:ffff88800d299301 [ 39.053814] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.054492] page_type: 0xffffffff() [ 39.054981] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a7200 dead000000000004 [ 39.055945] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d299301 [ 39.056895] page dumped because: kasan: bad access detected [ 39.057589] [ 39.057821] Memory state around the buggy address: [ 39.058430] ffff88800ed6fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.059339] ffff88800ed6fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.060242] >ffff88800ed6fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.061147] ^ [ 39.061801] ffff88800ed6fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.062699] ffff88800ed6fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.063617] ================================================================== [ 39.064718] Disabling lock debugging due to kernel taint [ 41.077398] BUG: Bad rss-counter state mm:0000000064d89578 type:MM_FILEPAGES val:33 [ 41.078592] BUG: Bad rss-counter state mm:0000000064d89578 type:MM_ANONPAGES val:22 [ 41.428384] BUG: Bad rss-counter state mm:0000000037d7b75e type:MM_FILEPAGES val:33 [ 41.428965] BUG: Bad rss-counter state mm:0000000037d7b75e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61937' (ECDSA) to the list of known hosts. 2023/06/20 10:53:41 fuzzer started 2023/06/20 10:53:41 dialing manager at localhost:36067 2023/06/20 10:53:41 checking machine... 2023/06/20 10:53:41 checking revisions... [ 42.049798] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:53:41 testing simple program... [ 42.086524] cgroup: Unknown subsys name 'net' [ 42.137265] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:53:41 Registers: info registers vcpu 0 RAX=0000000080010050 RBX=0000000000000001 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800ba18000 RSP=ffff88806ce09db8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=ffff88806ce09ff8 R12=00000000000103f6 R13=ffff88800ba18180 R14=ffff88800ba1c4c8 R15=ffff88800ba18008 RIP=ffffffff8219168f RFL=00000046 [---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 00007f96b7ae9900 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=00007ffcd21a2000 CR3=000000000eeda000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000a RBX=000000000000000a RCX=0000000000000000 RDX=00000000000101f2 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800ba181a0 RSP=ffff88800f46f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f2 R11=0000000000000128 R12=00000000000101f2 R13=ffff88800ba18050 R14=ffff88800ba18048 R15=ffff88800ba181a9 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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 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=00007f007dff1f70 CR3=000000000deb8000 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=2030343a33353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33353a3031203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000