syzkaller login: [ 28.824994] BUG: Bad rss-counter state mm:0000000036104b93 type:MM_FILEPAGES val:33 [ 28.826027] BUG: Bad rss-counter state mm:0000000036104b93 type:MM_ANONPAGES val:22 [ 28.986183] ================================================================== [ 28.987098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.988041] Read of size 8 at addr ffff88800eb2b968 by task sshd/223 [ 28.988885] [ 28.989142] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.990023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.991013] Call Trace: [ 28.991471] [ 28.991815] dump_stack_lvl+0x91/0xf0 [ 28.992406] print_report+0xcc/0x620 [ 28.993002] ? __virt_addr_valid+0x102/0x340 [ 28.993667] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.994408] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.995149] kasan_report+0xbe/0xf0 [ 28.995724] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.996486] vma_interval_tree_remove+0xc75/0xec0 [ 28.997249] vma_prepare+0xc54/0x11a0 [ 28.997853] __split_vma+0x5af/0x950 [ 28.998435] ? __pfx___split_vma+0x10/0x10 [ 28.999087] ? find_held_lock+0x2c/0x110 [ 28.999731] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.000432] ? lock_is_held_type+0x9f/0x120 [ 29.001111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.001723] ? mtree_range_walk+0x632/0x900 [ 29.002281] ? mas_walk+0x5c7/0x7c0 [ 29.002760] do_vmi_munmap+0x1f1/0x2b0 [ 29.003262] mmap_region+0x1f9/0x2660 [ 29.003754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.004265] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.004987] ? __pfx_lock_acquire+0x10/0x10 [ 29.005525] ? __pfx_mmap_region+0x10/0x10 [ 29.006062] ? security_mmap_addr+0x7d/0xa0 [ 29.006594] ? get_unmapped_area+0x1f5/0x3f0 [ 29.007147] do_mmap+0x854/0xf00 [ 29.007590] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.008081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.008654] ksys_mmap_pgoff+0x3af/0x500 [ 29.009158] do_syscall_64+0x3f/0x90 [ 29.009636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.010289] RIP: 0033:0x7f4da9bd0d82 [ 29.010745] 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 [ 29.012885] RSP: 002b:00007ffc2a1fc018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.013790] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4da9bd0d82 [ 29.014636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4da900a000 [ 29.015481] RBP: 00007f4da900a000 R08: 0000000000000009 R09: 0000000000001000 [ 29.016335] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565ad496b20 [ 29.017191] R13: 00007ffc2a1fc030 R14: 00007ffc2a1fc060 R15: 00007ffc2a1fc3c0 [ 29.018050] [ 29.018345] [ 29.018568] Allocated by task 214: [ 29.018992] kasan_save_stack+0x22/0x50 [ 29.019491] kasan_set_track+0x25/0x30 [ 29.019989] __kasan_slab_alloc+0x59/0x70 [ 29.020513] kmem_cache_alloc+0x16b/0x370 [ 29.021050] vm_area_dup+0x20/0x160 [ 29.021507] __split_vma+0x170/0x950 [ 29.021971] split_vma+0xc6/0x110 [ 29.022423] mprotect_fixup+0x8d2/0xb30 [ 29.022928] do_mprotect_pkey+0x87e/0xd40 [ 29.023448] __x64_sys_mprotect+0x78/0xc0 [ 29.023966] do_syscall_64+0x3f/0x90 [ 29.024453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.025107] [ 29.025325] Freed by task 212: [ 29.025722] kasan_save_stack+0x22/0x50 [ 29.026228] kasan_set_track+0x25/0x30 [ 29.026725] kasan_save_free_info+0x2b/0x50 [ 29.027263] __kasan_slab_free+0x10a/0x190 [ 29.027800] kmem_cache_free+0x10d/0x4d0 [ 29.028311] rcu_core+0x8c8/0x2860 [ 29.028767] __do_softirq+0x1b7/0x7d4 [ 29.029250] [ 29.029467] Last potentially related work creation: [ 29.030066] kasan_save_stack+0x22/0x50 [ 29.030579] __kasan_record_aux_stack+0x8e/0xa0 [ 29.031159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.031819] remove_vma+0x139/0x170 [ 29.032279] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.032863] do_vmi_munmap+0x1f1/0x2b0 [ 29.033354] __vm_munmap+0x138/0x3a0 [ 29.033824] __x64_sys_munmap+0x59/0x80 [ 29.034329] do_syscall_64+0x3f/0x90 [ 29.034812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.035468] [ 29.035684] The buggy address belongs to the object at ffff88800eb2b910 [ 29.035684] which belongs to the cache vm_area_struct of size 168 [ 29.037185] The buggy address is located 88 bytes inside of [ 29.037185] freed 168-byte region [ffff88800eb2b910, ffff88800eb2b9b8) [ 29.038597] [ 29.038814] The buggy address belongs to the physical page: [ 29.039482] page:00000000a74178bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb2b [ 29.040572] memcg:ffff88800eae1101 [ 29.041021] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.041670] page_type: 0xffffffff() [ 29.042125] raw: 0100000000000200 ffff8880087a0c80 ffffea00003abfc0 dead000000000002 [ 29.043057] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eae1101 [ 29.043974] page dumped because: kasan: bad access detected [ 29.044651] [ 29.044868] Memory state around the buggy address: [ 29.045484] ffff88800eb2b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.046363] ffff88800eb2b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.047232] >ffff88800eb2b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.048100] ^ [ 29.048904] ffff88800eb2b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.049793] ffff88800eb2ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.050654] ================================================================== [ 29.051648] Disabling lock debugging due to kernel taint [ 31.021719] BUG: Bad rss-counter state mm:000000008b7e24a3 type:MM_FILEPAGES val:33 [ 31.022746] BUG: Bad rss-counter state mm:000000008b7e24a3 type:MM_ANONPAGES val:22 [ 31.400823] BUG: Bad rss-counter state mm:000000005c95ca5d type:MM_FILEPAGES val:33 [ 31.402014] BUG: Bad rss-counter state mm:000000005c95ca5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36051' (ECDSA) to the list of known hosts. 2023/06/20 15:37:12 fuzzer started 2023/06/20 15:37:12 dialing manager at localhost:36067 2023/06/20 15:37:12 checking machine... 2023/06/20 15:37:12 checking revisions... [ 32.084485] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:37:12 testing simple program... [ 32.135922] cgroup: Unknown subsys name 'net' [ 32.176384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:37:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017da77c8 RCX=ffffffff86138eb0 RDX=1ffff11002fb4e8f RSI=0000000000000000 RDI=ffff888017da7478 RBP=ffff888017da0000 RSP=ffff888017da73f8 R8 =ffffffff86138eb4 R9 =ffff888017da74a8 R10=0000000000038001 R11=0000000000020d9c R12=ffff888017da74c8 R13=ffff888017da74b0 R14=ffff888017da77c8 R15=ffff888017da7468 RIP=ffffffff81131cac 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbe8181b900 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=00007fbe81dd0650 CR3=0000000017d32000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007ffdaadfb698 CR3=0000000009554000 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=2032313a37333a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3233 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3233325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a37333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000