syzkaller login: [ 29.978198] BUG: Bad rss-counter state mm:00000000b0715e50 type:MM_FILEPAGES val:33 [ 29.979354] BUG: Bad rss-counter state mm:00000000b0715e50 type:MM_ANONPAGES val:22 [ 30.158004] ================================================================== [ 30.158940] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.159880] Read of size 8 at addr ffff8880168f3310 by task sshd/220 [ 30.160661] [ 30.160881] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.161944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.162943] Call Trace: [ 30.163267] <TASK> [ 30.163579] dump_stack_lvl+0x91/0xf0 [ 30.164080] print_report+0xcc/0x620 [ 30.164571] ? __virt_addr_valid+0x102/0x340 [ 30.165120] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.165762] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.166436] kasan_report+0xbe/0xf0 [ 30.166914] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.167551] vma_interval_tree_remove+0xc75/0xec0 [ 30.168158] vma_prepare+0xc54/0x11a0 [ 30.168648] __split_vma+0x5af/0x950 [ 30.169113] ? __pfx___split_vma+0x10/0x10 [ 30.169669] ? find_held_lock+0x2c/0x110 [ 30.170207] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.170777] ? lock_is_held_type+0x9f/0x120 [ 30.171310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.171917] ? mtree_range_walk+0x632/0x900 [ 30.172483] ? mas_walk+0x5c7/0x7c0 [ 30.172955] do_vmi_munmap+0x1f1/0x2b0 [ 30.173469] mmap_region+0x1f9/0x2660 [ 30.173959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.174486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.175199] ? __pfx_lock_acquire+0x10/0x10 [ 30.175738] ? __pfx_mmap_region+0x10/0x10 [ 30.176262] ? security_mmap_addr+0x7d/0xa0 [ 30.176805] ? get_unmapped_area+0x1f5/0x3f0 [ 30.177352] do_mmap+0x854/0xf00 [ 30.177839] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.178333] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.178905] ksys_mmap_pgoff+0x3af/0x500 [ 30.179433] do_syscall_64+0x3f/0x90 [ 30.179907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.180567] RIP: 0033:0x7fae1a86cd82 [ 30.181016] 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 [ 30.183170] RSP: 002b:00007ffceca3ae78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.184082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae1a86cd82 [ 30.184928] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae19ca6000 [ 30.185810] RBP: 00007fae19ca6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.186670] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613d05a0f70 [ 30.187521] R13: 00007ffceca3ae90 R14: 00007ffceca3aec0 R15: 00007ffceca3b220 [ 30.188374] </TASK> [ 30.188669] [ 30.188882] Allocated by task 213: [ 30.189311] kasan_save_stack+0x22/0x50 [ 30.189843] kasan_set_track+0x25/0x30 [ 30.190336] __kasan_slab_alloc+0x59/0x70 [ 30.190866] kmem_cache_alloc+0x16b/0x370 [ 30.191391] vm_area_dup+0x20/0x160 [ 30.191851] __split_vma+0x170/0x950 [ 30.192314] split_vma+0xc6/0x110 [ 30.192760] mprotect_fixup+0x8d2/0xb30 [ 30.193263] do_mprotect_pkey+0x87e/0xd40 [ 30.193815] __x64_sys_mprotect+0x78/0xc0 [ 30.194338] do_syscall_64+0x3f/0x90 [ 30.194826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.195480] [ 30.195697] Freed by task 203: [ 30.196087] kasan_save_stack+0x22/0x50 [ 30.196598] kasan_set_track+0x25/0x30 [ 30.197094] kasan_save_free_info+0x2b/0x50 [ 30.197651] __kasan_slab_free+0x10a/0x190 [ 30.198196] kmem_cache_free+0x10d/0x4d0 [ 30.198724] rcu_core+0x8c8/0x2860 [ 30.199164] __do_softirq+0x1b7/0x7d4 [ 30.199656] [ 30.199866] Last potentially related work creation: [ 30.200465] kasan_save_stack+0x22/0x50 [ 30.200966] __kasan_record_aux_stack+0x8e/0xa0 [ 30.201567] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.202229] remove_vma+0x139/0x170 [ 30.202821] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.203380] do_vmi_munmap+0x1f1/0x2b0 [ 30.203862] __vm_munmap+0x138/0x3a0 [ 30.204330] __x64_sys_munmap+0x59/0x80 [ 30.204847] do_syscall_64+0x3f/0x90 [ 30.205325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.206004] [ 30.206220] Second to last potentially related work creation: [ 30.206912] kasan_save_stack+0x22/0x50 [ 30.207428] __kasan_record_aux_stack+0x8e/0xa0 [ 30.207998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.208652] remove_vma+0x139/0x170 [ 30.209097] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.209676] do_vmi_munmap+0x1f1/0x2b0 [ 30.210172] mmap_region+0x1f9/0x2660 [ 30.210661] do_mmap+0x854/0xf00 [ 30.211092] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.211592] ksys_mmap_pgoff+0x3af/0x500 [ 30.212090] do_syscall_64+0x3f/0x90 [ 30.212577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.213211] [ 30.213447] The buggy address belongs to the object at ffff8880168f32b8 [ 30.213447] which belongs to the cache vm_area_struct of size 168 [ 30.214933] The buggy address is located 88 bytes inside of [ 30.214933] freed 168-byte region [ffff8880168f32b8, ffff8880168f3360) [ 30.216331] [ 30.216554] The buggy address belongs to the physical page: [ 30.217203] page:000000005d754d65 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168f3 [ 30.218331] memcg:ffff8880168f2001 [ 30.218763] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.219415] page_type: 0xffffffff() [ 30.219863] raw: 0100000000000200 ffff8880087a0c80 ffffea00005bbac0 0000000000000004 [ 30.220778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168f2001 [ 30.221700] page dumped because: kasan: bad access detected [ 30.222374] [ 30.222596] Memory state around the buggy address: [ 30.223171] ffff8880168f3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.224034] ffff8880168f3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.224895] >ffff8880168f3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.225766] ^ [ 30.226256] ffff8880168f3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.227120] ffff8880168f3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.227970] ================================================================== [ 30.228892] Disabling lock debugging due to kernel taint [ 32.404789] BUG: Bad rss-counter state mm:00000000a89c1e16 type:MM_FILEPAGES val:33 [ 32.406376] BUG: Bad rss-counter state mm:00000000a89c1e16 type:MM_ANONPAGES val:22 [ 32.868174] BUG: Bad rss-counter state mm:000000006e673e8c type:MM_FILEPAGES val:33 [ 32.869174] BUG: Bad rss-counter state mm:000000006e673e8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13626' (ECDSA) to the list of known hosts. 2023/06/20 13:26:58 fuzzer started 2023/06/20 13:26:58 dialing manager at localhost:36067 2023/06/20 13:26:58 checking machine... 2023/06/20 13:26:58 checking revisions... [ 33.604567] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:26:59 testing simple program... [ 33.657911] cgroup: Unknown subsys name 'net' [ 33.706031] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:26:58 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88801993e2f0 RCX=ffffffff818ca391 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88801993e380 RBP=ffff888015c84000 RSP=ffff8880145ffd30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000040500000 R13=ffff88801993e380 R14=0000000000000000 R15=ffff888015c841e8 RIP=ffffffff8180fea8 RFL=00000202 [-------] 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 00007f0c88df4900 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=00007f0c893ac0b0 CR3=0000000016562000 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=2038353a36323a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a36323a3331203032 XMM08=3d656e696c646d632022656369767265 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=00007f12a51273e0 CR3=0000000009978000 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=00000000000000000000000000000000 XMM01=392e2a0fb58da994af43ced0406ee7b9 XMM02=ec2efd57dc4c00df000000000011a388 XMM03=dc10f2f0fc3960bb000000000011a458 XMM04=769c8a99abeb1dab00000000000ae988 XMM05=19e9129bd510f2350000000000132de0 XMM06=4fda316b135da52b0000000000132c68 XMM07=e042d86d42eb936e0000000000121c18 XMM08=dc10f2f0fc3960bb000000000011a458 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000