syzkaller login: [ 38.870174] BUG: Bad rss-counter state mm:0000000054ae2253 type:MM_FILEPAGES val:33 [ 38.871806] BUG: Bad rss-counter state mm:0000000054ae2253 type:MM_ANONPAGES val:22 [ 39.028422] ================================================================== [ 39.029580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.030779] Read of size 8 at addr ffff88800d8e7a50 by task sshd/219 [ 39.031779] [ 39.032013] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.032951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.034010] Call Trace: [ 39.034352] [ 39.034649] dump_stack_lvl+0x91/0xf0 [ 39.035163] print_report+0xcc/0x620 [ 39.035669] ? __virt_addr_valid+0x102/0x340 [ 39.036253] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.036915] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.037561] kasan_report+0xbe/0xf0 [ 39.038068] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.038718] vma_interval_tree_remove+0xc75/0xec0 [ 39.039349] vma_prepare+0xc54/0x11a0 [ 39.039851] __split_vma+0x5af/0x950 [ 39.040371] ? __pfx___split_vma+0x10/0x10 [ 39.040928] ? find_held_lock+0x2c/0x110 [ 39.041493] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.042106] ? lock_is_held_type+0x9f/0x120 [ 39.042690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.043340] ? mtree_range_walk+0x632/0x900 [ 39.043940] ? mas_walk+0x5c7/0x7c0 [ 39.044462] do_vmi_munmap+0x1f1/0x2b0 [ 39.044991] mmap_region+0x1f9/0x2660 [ 39.045512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.046066] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.046834] ? __pfx_lock_acquire+0x10/0x10 [ 39.047410] ? __pfx_mmap_region+0x10/0x10 [ 39.047987] ? security_mmap_addr+0x7d/0xa0 [ 39.048561] ? get_unmapped_area+0x1f5/0x3f0 [ 39.049158] do_mmap+0x854/0xf00 [ 39.049635] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.050174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.050782] ksys_mmap_pgoff+0x3af/0x500 [ 39.051335] do_syscall_64+0x3f/0x90 [ 39.051855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.052564] RIP: 0033:0x7f59b47a5d82 [ 39.053062] 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 [ 39.055356] RSP: 002b:00007fff2d898f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.056353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59b47a5d82 [ 39.057282] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59b3bdf000 [ 39.058193] RBP: 00007f59b3bdf000 R08: 0000000000000009 R09: 0000000000001000 [ 39.059102] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e65bf4ec0 [ 39.060025] R13: 00007fff2d898fa0 R14: 00007fff2d898fd0 R15: 00007fff2d899330 [ 39.060960] [ 39.061279] [ 39.061510] Allocated by task 212: [ 39.061965] kasan_save_stack+0x22/0x50 [ 39.062514] kasan_set_track+0x25/0x30 [ 39.063052] __kasan_slab_alloc+0x59/0x70 [ 39.063623] kmem_cache_alloc+0x16b/0x370 [ 39.064187] vm_area_dup+0x20/0x160 [ 39.064679] __split_vma+0x170/0x950 [ 39.065178] split_vma+0xc6/0x110 [ 39.065655] mprotect_fixup+0x8d2/0xb30 [ 39.066201] do_mprotect_pkey+0x87e/0xd40 [ 39.066765] __x64_sys_mprotect+0x78/0xc0 [ 39.067333] do_syscall_64+0x3f/0x90 [ 39.067849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.068554] [ 39.068791] Freed by task 212: [ 39.069218] kasan_save_stack+0x22/0x50 [ 39.069769] kasan_set_track+0x25/0x30 [ 39.070309] kasan_save_free_info+0x2b/0x50 [ 39.070895] __kasan_slab_free+0x10a/0x190 [ 39.071478] kmem_cache_free+0x10d/0x4d0 [ 39.072032] rcu_core+0x8c8/0x2860 [ 39.072529] __do_softirq+0x1b7/0x7d4 [ 39.073052] [ 39.073283] Last potentially related work creation: [ 39.073918] kasan_save_stack+0x22/0x50 [ 39.074463] __kasan_record_aux_stack+0x8e/0xa0 [ 39.075092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.075790] remove_vma+0x139/0x170 [ 39.076290] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.076895] do_vmi_munmap+0x1f1/0x2b0 [ 39.077422] __vm_munmap+0x138/0x3a0 [ 39.077936] __x64_sys_munmap+0x59/0x80 [ 39.078476] do_syscall_64+0x3f/0x90 [ 39.078989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.079689] [ 39.079922] The buggy address belongs to the object at ffff88800d8e79f8 [ 39.079922] which belongs to the cache vm_area_struct of size 168 [ 39.081516] The buggy address is located 88 bytes inside of [ 39.081516] freed 168-byte region [ffff88800d8e79f8, ffff88800d8e7aa0) [ 39.083052] [ 39.083286] The buggy address belongs to the physical page: [ 39.084004] page:0000000002adb725 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8e7 [ 39.085195] memcg:ffff88800d9d8601 [ 39.085658] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.086362] page_type: 0xffffffff() [ 39.086852] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.087849] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9d8601 [ 39.088823] page dumped because: kasan: bad access detected [ 39.089540] [ 39.089772] Memory state around the buggy address: [ 39.090403] ffff88800d8e7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.091335] ffff88800d8e7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.092266] >ffff88800d8e7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.093208] ^ [ 39.093970] ffff88800d8e7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.094901] ffff88800d8e7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.095826] ================================================================== [ 39.097085] Disabling lock debugging due to kernel taint [ 41.624068] BUG: Bad rss-counter state mm:0000000078c2eba1 type:MM_FILEPAGES val:33 [ 41.625114] BUG: Bad rss-counter state mm:0000000078c2eba1 type:MM_ANONPAGES val:22 [ 42.135043] BUG: Bad rss-counter state mm:00000000b3e3266b type:MM_FILEPAGES val:33 [ 42.136190] BUG: Bad rss-counter state mm:00000000b3e3266b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63923' (ECDSA) to the list of known hosts. 2023/06/20 23:03:42 fuzzer started 2023/06/20 23:03:42 dialing manager at localhost:36067 2023/06/20 23:03:42 checking machine... 2023/06/20 23:03:42 checking revisions... [ 42.790621] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:03:42 testing simple program... [ 42.832806] cgroup: Unknown subsys name 'net' [ 42.888842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:03:42 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff81745be8 RDX=000000000000745b RSI=000000000000745b RDI=ffffffff86506b5c RBP=ffff88800ef6f0c0 RSP=ffff88800ef6eff8 R8 =0000000000000000 R9 =ffff88800ef6f0a8 R10=0000000000038001 R11=000000000001e4ed R12=ffff88800ef6f0c8 R13=ffff88800ef6f0b0 R14=ffff88800ef6f0a9 R15=ffff88800ef6f068 RIP=ffffffff811307c2 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 00007ffbe2bc5900 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=00007ffbe2ba4020 CR3=000000000dfbc000 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=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=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=00007f913cd40bc0 CR3=000000000caa6000 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=2032343a33303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000