syzkaller login: [ 31.136497] BUG: Bad rss-counter state mm:00000000bdf8eb7b type:MM_FILEPAGES val:33 [ 31.137701] BUG: Bad rss-counter state mm:00000000bdf8eb7b type:MM_ANONPAGES val:22 [ 31.177423] ================================================================== [ 31.178427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.179557] Read of size 8 at addr ffff888019bb1df0 by task sshd/219 [ 31.180520] [ 31.180741] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.181675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.182688] Call Trace: [ 31.183059] <TASK> [ 31.183423] dump_stack_lvl+0x91/0xf0 [ 31.184048] print_report+0xcc/0x620 [ 31.184525] ? __virt_addr_valid+0x102/0x340 [ 31.185075] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185687] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186297] kasan_report+0xbe/0xf0 [ 31.186773] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187398] vma_interval_tree_remove+0xc75/0xec0 [ 31.188003] vma_prepare+0xc54/0x11a0 [ 31.188481] __split_vma+0x5af/0x950 [ 31.188953] ? __pfx___split_vma+0x10/0x10 [ 31.189480] ? find_held_lock+0x2c/0x110 [ 31.190003] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.190568] ? lock_is_held_type+0x9f/0x120 [ 31.191115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.191718] ? mtree_range_walk+0x632/0x900 [ 31.192267] ? mas_walk+0x5c7/0x7c0 [ 31.192740] do_vmi_munmap+0x1f1/0x2b0 [ 31.193229] mmap_region+0x1f9/0x2660 [ 31.193705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.194206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.194940] ? __pfx_lock_acquire+0x10/0x10 [ 31.195471] ? __pfx_mmap_region+0x10/0x10 [ 31.195998] ? security_mmap_addr+0x7d/0xa0 [ 31.196530] ? get_unmapped_area+0x1f5/0x3f0 [ 31.197079] do_mmap+0x854/0xf00 [ 31.197515] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.198008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.198568] ksys_mmap_pgoff+0x3af/0x500 [ 31.199083] do_syscall_64+0x3f/0x90 [ 31.199563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200207] RIP: 0033:0x7f8cafac8d82 [ 31.200667] 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 [ 31.202768] RSP: 002b:00007fffdd50c6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.203668] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cafac8d82 [ 31.204501] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8caef02000 [ 31.205346] RBP: 00007f8caef02000 R08: 0000000000000009 R09: 0000000000001000 [ 31.206187] R10: 0000000000000812 R11: 0000000000000206 R12: 000055901eca1ec0 [ 31.207030] R13: 00007fffdd50c710 R14: 00007fffdd50c740 R15: 00007fffdd50caa0 [ 31.207878] </TASK> [ 31.208166] [ 31.208381] Allocated by task 212: [ 31.208806] kasan_save_stack+0x22/0x50 [ 31.209301] kasan_set_track+0x25/0x30 [ 31.209784] __kasan_slab_alloc+0x59/0x70 [ 31.210305] kmem_cache_alloc+0x16b/0x370 [ 31.210827] vm_area_dup+0x20/0x160 [ 31.211309] __split_vma+0x170/0x950 [ 31.211779] split_vma+0xc6/0x110 [ 31.212214] mprotect_fixup+0x8d2/0xb30 [ 31.212714] do_mprotect_pkey+0x87e/0xd40 [ 31.213242] __x64_sys_mprotect+0x78/0xc0 [ 31.213760] do_syscall_64+0x3f/0x90 [ 31.214228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214881] [ 31.215093] Freed by task 202: [ 31.215480] kasan_save_stack+0x22/0x50 [ 31.215976] kasan_set_track+0x25/0x30 [ 31.216469] kasan_save_free_info+0x2b/0x50 [ 31.217011] __kasan_slab_free+0x10a/0x190 [ 31.217544] kmem_cache_free+0x10d/0x4d0 [ 31.218052] rcu_core+0x8c8/0x2860 [ 31.218518] __do_softirq+0x1b7/0x7d4 [ 31.219000] [ 31.219225] Last potentially related work creation: [ 31.219811] kasan_save_stack+0x22/0x50 [ 31.220320] __kasan_record_aux_stack+0x8e/0xa0 [ 31.220891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.221534] remove_vma+0x139/0x170 [ 31.221988] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.222549] do_vmi_munmap+0x1f1/0x2b0 [ 31.223038] __vm_munmap+0x138/0x3a0 [ 31.223507] __x64_sys_munmap+0x59/0x80 [ 31.224003] do_syscall_64+0x3f/0x90 [ 31.224475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225111] [ 31.225330] The buggy address belongs to the object at ffff888019bb1d98 [ 31.225330] which belongs to the cache vm_area_struct of size 168 [ 31.226792] The buggy address is located 88 bytes inside of [ 31.226792] freed 168-byte region [ffff888019bb1d98, ffff888019bb1e40) [ 31.228197] [ 31.228409] The buggy address belongs to the physical page: [ 31.229068] page:00000000eb2eecfe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bb1 [ 31.230136] memcg:ffff888016d3dc01 [ 31.230556] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.231250] page_type: 0xffffffff() [ 31.231694] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a1f80 dead000000000007 [ 31.232612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d3dc01 [ 31.233517] page dumped because: kasan: bad access detected [ 31.234175] [ 31.234399] Memory state around the buggy address: [ 31.234974] ffff888019bb1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.235827] ffff888019bb1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.236672] >ffff888019bb1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.237514] ^ [ 31.238316] ffff888019bb1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.239177] ffff888019bb1e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.240014] ================================================================== [ 31.240972] Disabling lock debugging due to kernel taint [ 33.195714] BUG: Bad rss-counter state mm:0000000064777a73 type:MM_FILEPAGES val:33 [ 33.196958] BUG: Bad rss-counter state mm:0000000064777a73 type:MM_ANONPAGES val:22 [ 33.731456] BUG: Bad rss-counter state mm:000000005279f0aa type:MM_FILEPAGES val:33 [ 33.732699] BUG: Bad rss-counter state mm:000000005279f0aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24578' (ECDSA) to the list of known hosts. 2023/06/20 17:24:44 fuzzer started 2023/06/20 17:24:44 dialing manager at localhost:36067 2023/06/20 17:24:44 checking machine... 2023/06/20 17:24:44 checking revisions... [ 34.333024] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:24:44 testing simple program... [ 34.379471] cgroup: Unknown subsys name 'net' [ 34.432138] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:24:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801811f9f8 RCX=0000000000000001 RDX=1ffff11003023f51 RSI=ffffffff818c73ee RDI=ffff88801811fa04 RBP=ffff88801811fa88 RSP=ffff88801811f910 R8 =0000000000000001 R9 =ffff88801811f970 R10=0000000000038001 R11=0000000000020cbd R12=ffff88801811f9f8 R13=0000000000000000 R14=ffff888016a49b40 R15=ffff88800e114480 RIP=ffffffff813ad547 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 00007fcfd8668900 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=00007ffe28961000 CR3=000000000f994000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f6702d6f0c0 CR3=00000000182d2000 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=2034343a34323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a34323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000