syzkaller login: [ 60.826305] BUG: Bad rss-counter state mm:000000001179d518 type:MM_FILEPAGES val:33 [ 60.827598] BUG: Bad rss-counter state mm:000000001179d518 type:MM_ANONPAGES val:22 [ 61.003650] ================================================================== [ 61.004777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.005920] Read of size 8 at addr ffff888019e1e880 by task sshd/227 [ 61.006718] [ 61.006942] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.007853] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.008893] Call Trace: [ 61.009222] [ 61.009518] dump_stack_lvl+0x91/0xf0 [ 61.010031] print_report+0xcc/0x620 [ 61.010536] ? __virt_addr_valid+0x102/0x340 [ 61.011097] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.011721] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.012376] kasan_report+0xbe/0xf0 [ 61.012862] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.013496] vma_interval_tree_remove+0xc75/0xec0 [ 61.014113] vma_prepare+0xc54/0x11a0 [ 61.014596] __split_vma+0x5af/0x950 [ 61.015084] ? __pfx___split_vma+0x10/0x10 [ 61.015622] ? find_held_lock+0x2c/0x110 [ 61.016163] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.016737] ? lock_is_held_type+0x9f/0x120 [ 61.017287] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.017907] ? mtree_range_walk+0x632/0x900 [ 61.018466] ? mas_walk+0x5c7/0x7c0 [ 61.018951] do_vmi_munmap+0x1f1/0x2b0 [ 61.019449] mmap_region+0x1f9/0x2660 [ 61.019938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.020474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.021213] ? __pfx_lock_acquire+0x10/0x10 [ 61.021752] ? __pfx_mmap_region+0x10/0x10 [ 61.022295] ? security_mmap_addr+0x7d/0xa0 [ 61.022832] ? get_unmapped_area+0x1f5/0x3f0 [ 61.023390] do_mmap+0x854/0xf00 [ 61.023832] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.024360] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.024935] ksys_mmap_pgoff+0x3af/0x500 [ 61.025454] do_syscall_64+0x3f/0x90 [ 61.025950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.026607] RIP: 0033:0x7f948893ad82 [ 61.027072] 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 [ 61.029226] RSP: 002b:00007ffd681bdbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.030143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f948893ad82 [ 61.031006] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9487d74000 [ 61.031861] RBP: 00007f9487d74000 R08: 0000000000000009 R09: 0000000000001000 [ 61.032735] R10: 0000000000000812 R11: 0000000000000206 R12: 000055751becbf70 [ 61.033593] R13: 00007ffd681bdbd0 R14: 00007ffd681bdc00 R15: 00007ffd681bdf60 [ 61.034461] [ 61.034760] [ 61.034978] Allocated by task 220: [ 61.035417] kasan_save_stack+0x22/0x50 [ 61.035923] kasan_set_track+0x25/0x30 [ 61.036436] __kasan_slab_alloc+0x59/0x70 [ 61.036968] kmem_cache_alloc+0x16b/0x370 [ 61.037487] vm_area_dup+0x20/0x160 [ 61.037959] __split_vma+0x170/0x950 [ 61.038447] split_vma+0xc6/0x110 [ 61.038894] mprotect_fixup+0x8d2/0xb30 [ 61.039401] do_mprotect_pkey+0x87e/0xd40 [ 61.039927] __x64_sys_mprotect+0x78/0xc0 [ 61.040479] do_syscall_64+0x3f/0x90 [ 61.040960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.041608] [ 61.041827] Freed by task 220: [ 61.042222] kasan_save_stack+0x22/0x50 [ 61.042726] kasan_set_track+0x25/0x30 [ 61.043221] kasan_save_free_info+0x2b/0x50 [ 61.043760] __kasan_slab_free+0x10a/0x190 [ 61.044306] kmem_cache_free+0x10d/0x4d0 [ 61.044823] rcu_core+0x8c8/0x2860 [ 61.045271] __do_softirq+0x1b7/0x7d4 [ 61.045747] [ 61.045962] Last potentially related work creation: [ 61.046545] kasan_save_stack+0x22/0x50 [ 61.047045] __kasan_record_aux_stack+0x8e/0xa0 [ 61.047616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.048269] remove_vma+0x139/0x170 [ 61.048722] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.049276] do_vmi_munmap+0x1f1/0x2b0 [ 61.049761] __vm_munmap+0x138/0x3a0 [ 61.050224] __x64_sys_munmap+0x59/0x80 [ 61.050719] do_syscall_64+0x3f/0x90 [ 61.051195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.051836] [ 61.052065] The buggy address belongs to the object at ffff888019e1e828 [ 61.052065] which belongs to the cache vm_area_struct of size 168 [ 61.053529] The buggy address is located 88 bytes inside of [ 61.053529] freed 168-byte region [ffff888019e1e828, ffff888019e1e8d0) [ 61.054938] [ 61.055153] The buggy address belongs to the physical page: [ 61.055803] page:00000000be3b2158 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e1e [ 61.056895] memcg:ffff8880168e7701 [ 61.057321] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.057968] page_type: 0xffffffff() [ 61.058417] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.059335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168e7701 [ 61.060255] page dumped because: kasan: bad access detected [ 61.060921] [ 61.061134] Memory state around the buggy address: [ 61.061702] ffff888019e1e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.062539] ffff888019e1e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.063378] >ffff888019e1e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.064224] ^ [ 61.064633] ffff888019e1e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.065486] ffff888019e1e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.066328] ================================================================== [ 61.067650] Disabling lock debugging due to kernel taint [ 62.981632] BUG: Bad rss-counter state mm:00000000fa3c2d58 type:MM_FILEPAGES val:33 [ 62.982617] BUG: Bad rss-counter state mm:00000000fa3c2d58 type:MM_ANONPAGES val:22 [ 63.516800] BUG: Bad rss-counter state mm:00000000b2c21db3 type:MM_FILEPAGES val:33 [ 63.518207] BUG: Bad rss-counter state mm:00000000b2c21db3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49346' (ECDSA) to the list of known hosts. 2023/06/20 14:30:23 fuzzer started 2023/06/20 14:30:24 dialing manager at localhost:36067 2023/06/20 14:30:24 checking machine... 2023/06/20 14:30:24 checking revisions... [ 64.226471] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:30:24 testing simple program... [ 64.271249] cgroup: Unknown subsys name 'net' [ 64.327208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:30:23 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=00007fcd77c4c650 CR3=000000000dd88000 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=2033323a30333a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a30333a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801630e840 RCX=0000000000000000 RDX=1ffffffff09a5d49 RSI=ffffffff818c69aa RDI=ffffffff84d2ea48 RBP=000000000000c000 RSP=ffff888016487d10 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff84d2ea40 R13=0000000000000008 R14=ffffffff84d2fb80 R15=ffff888008f7a000 RIP=ffffffff818c69e7 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 00007fcd77697900 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=00007ffdbb374000 CR3=000000000f600000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000