syzkaller login: [ 38.959400] BUG: Bad rss-counter state mm:00000000a97b732e type:MM_FILEPAGES val:33 [ 38.960665] BUG: Bad rss-counter state mm:00000000a97b732e type:MM_ANONPAGES val:22 [ 39.014788] ================================================================== [ 39.015727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.016683] Read of size 8 at addr ffff88801a11b880 by task sshd/219 [ 39.017461] [ 39.017682] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.018666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.019662] Call Trace: [ 39.019987] [ 39.020271] dump_stack_lvl+0x91/0xf0 [ 39.020767] print_report+0xcc/0x620 [ 39.021254] ? __virt_addr_valid+0x102/0x340 [ 39.021812] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.022429] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.023056] kasan_report+0xbe/0xf0 [ 39.023563] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.024200] vma_interval_tree_remove+0xc75/0xec0 [ 39.024799] vma_prepare+0xc54/0x11a0 [ 39.025283] __split_vma+0x5af/0x950 [ 39.025763] ? __pfx___split_vma+0x10/0x10 [ 39.026293] ? find_held_lock+0x2c/0x110 [ 39.026815] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.027389] ? lock_is_held_type+0x9f/0x120 [ 39.027936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.028551] ? mtree_range_walk+0x632/0x900 [ 39.029108] ? mas_walk+0x5c7/0x7c0 [ 39.029587] do_vmi_munmap+0x1f1/0x2b0 [ 39.030091] mmap_region+0x1f9/0x2660 [ 39.030576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.031091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.031818] ? __pfx_lock_acquire+0x10/0x10 [ 39.032366] ? __pfx_mmap_region+0x10/0x10 [ 39.032906] ? security_mmap_addr+0x7d/0xa0 [ 39.033439] ? get_unmapped_area+0x1f5/0x3f0 [ 39.034002] do_mmap+0x854/0xf00 [ 39.034446] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.034965] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.035557] ksys_mmap_pgoff+0x3af/0x500 [ 39.036073] do_syscall_64+0x3f/0x90 [ 39.036564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.037225] RIP: 0033:0x7fcf492f2d82 [ 39.037698] 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 [ 39.039894] RSP: 002b:00007ffe9ee5e9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.040813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf492f2d82 [ 39.041674] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf4872c000 [ 39.042536] RBP: 00007fcf4872c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.043397] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4ae7f1ec0 [ 39.044294] R13: 00007ffe9ee5e9f0 R14: 00007ffe9ee5ea20 R15: 00007ffe9ee5ed80 [ 39.045165] [ 39.045465] [ 39.045686] Allocated by task 212: [ 39.046124] kasan_save_stack+0x22/0x50 [ 39.046642] kasan_set_track+0x25/0x30 [ 39.047141] __kasan_slab_alloc+0x59/0x70 [ 39.047677] kmem_cache_alloc+0x16b/0x370 [ 39.048196] vm_area_dup+0x20/0x160 [ 39.048662] __split_vma+0x170/0x950 [ 39.049128] split_vma+0xc6/0x110 [ 39.049572] mprotect_fixup+0x8d2/0xb30 [ 39.050077] do_mprotect_pkey+0x87e/0xd40 [ 39.050605] __x64_sys_mprotect+0x78/0xc0 [ 39.051131] do_syscall_64+0x3f/0x90 [ 39.051619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.052264] [ 39.052477] Freed by task 203: [ 39.052879] kasan_save_stack+0x22/0x50 [ 39.053382] kasan_set_track+0x25/0x30 [ 39.053878] kasan_save_free_info+0x2b/0x50 [ 39.054413] __kasan_slab_free+0x10a/0x190 [ 39.054953] kmem_cache_free+0x10d/0x4d0 [ 39.055469] rcu_core+0x8c8/0x2860 [ 39.055940] __do_softirq+0x1b7/0x7d4 [ 39.056425] [ 39.056649] Last potentially related work creation: [ 39.057250] kasan_save_stack+0x22/0x50 [ 39.057770] __kasan_record_aux_stack+0x8e/0xa0 [ 39.058353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.059000] remove_vma+0x139/0x170 [ 39.059456] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.060032] do_vmi_munmap+0x1f1/0x2b0 [ 39.060528] __vm_munmap+0x138/0x3a0 [ 39.061000] __x64_sys_munmap+0x59/0x80 [ 39.061512] do_syscall_64+0x3f/0x90 [ 39.061989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.062645] [ 39.062866] The buggy address belongs to the object at ffff88801a11b828 [ 39.062866] which belongs to the cache vm_area_struct of size 168 [ 39.064373] The buggy address is located 88 bytes inside of [ 39.064373] freed 168-byte region [ffff88801a11b828, ffff88801a11b8d0) [ 39.065795] [ 39.066014] The buggy address belongs to the physical page: [ 39.066680] page:00000000d70f6b63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a11b [ 39.067802] memcg:ffff88801a0a0a01 [ 39.068235] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.068889] page_type: 0xffffffff() [ 39.069345] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.070275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0a0a01 [ 39.071186] page dumped because: kasan: bad access detected [ 39.071855] [ 39.072075] Memory state around the buggy address: [ 39.072663] ffff88801a11b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.073532] ffff88801a11b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.074420] >ffff88801a11b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.075289] ^ [ 39.075730] ffff88801a11b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.076610] ffff88801a11b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.077489] ================================================================== [ 39.078586] Disabling lock debugging due to kernel taint [ 41.006320] BUG: Bad rss-counter state mm:00000000ac827c06 type:MM_FILEPAGES val:33 [ 41.007884] BUG: Bad rss-counter state mm:00000000ac827c06 type:MM_ANONPAGES val:22 [ 41.600590] BUG: Bad rss-counter state mm:00000000ee4060da type:MM_FILEPAGES val:33 [ 41.601592] BUG: Bad rss-counter state mm:00000000ee4060da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17598' (ECDSA) to the list of known hosts. 2023/06/20 13:59:02 fuzzer started 2023/06/20 13:59:03 dialing manager at localhost:36067 2023/06/20 13:59:03 checking machine... 2023/06/20 13:59:03 checking revisions... [ 42.255570] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:59:03 testing simple program... [ 42.315792] cgroup: Unknown subsys name 'net' [ 42.402307] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:59:02 Registers: info registers vcpu 0 RAX=1ffff110019c5c13 RBX=ffff88800ce2e068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ce2e098 RBP=ffff8880088f02f0 RSP=ffff8880102efd08 R8 =0000000000000001 R9 =ffffed100205df95 R10=0000000000000003 R11=00000000000b6d7d R12=dffffc0000000000 R13=ffff8880088eda40 R14=ffffffff818d9c06 R15=ffff88800dba9080 RIP=ffffffff818464ec 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6df8efb900 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=00007f6df8351790 CR3=000000000d6c8000 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=b3285ca56c489dff000000000010a378 XMM01=966359b9a40beeb11a4e44b0fff2873b XMM02=ec2efd57dc4c00df000000000011c020 XMM03=b90027bc30a15f3d000000000011c0f0 XMM04=96847bea57b6444600000000000ae988 XMM05=dfcdbad4f1609c370000000000131e90 XMM06=806171799158d9670000000000131d18 XMM07=e042d86d42eb936e0000000000122570 XMM08=b90027bc30a15f3d000000000011c0f0 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=00007ffdbf8ffdc8 CR3=000000000f072000 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=2032303a39353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000