syzkaller login: [ 31.184277] BUG: Bad rss-counter state mm:0000000029fa1903 type:MM_FILEPAGES val:33 [ 31.185206] BUG: Bad rss-counter state mm:0000000029fa1903 type:MM_ANONPAGES val:22 [ 31.224807] ================================================================== [ 31.225535] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.226241] Read of size 8 at addr ffff88800e0ac140 by task sshd/219 [ 31.226805] [ 31.226960] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.227751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.228431] Call Trace: [ 31.228625] [ 31.228796] dump_stack_lvl+0x91/0xf0 [ 31.229095] print_report+0xcc/0x620 [ 31.229385] ? __virt_addr_valid+0x102/0x340 [ 31.229718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.230104] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.230480] kasan_report+0xbe/0xf0 [ 31.230775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231147] vma_interval_tree_remove+0xc75/0xec0 [ 31.231510] vma_prepare+0xc54/0x11a0 [ 31.231800] __split_vma+0x5af/0x950 [ 31.232086] ? __pfx___split_vma+0x10/0x10 [ 31.232402] ? find_held_lock+0x2c/0x110 [ 31.232713] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.233048] ? lock_is_held_type+0x9f/0x120 [ 31.233377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.233747] ? mtree_range_walk+0x632/0x900 [ 31.234081] ? mas_walk+0x5c7/0x7c0 [ 31.234368] do_vmi_munmap+0x1f1/0x2b0 [ 31.234665] mmap_region+0x1f9/0x2660 [ 31.234953] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.235263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.235693] ? __pfx_lock_acquire+0x10/0x10 [ 31.236013] ? __pfx_mmap_region+0x10/0x10 [ 31.236328] ? security_mmap_addr+0x7d/0xa0 [ 31.236650] ? get_unmapped_area+0x1f5/0x3f0 [ 31.236974] do_mmap+0x854/0xf00 [ 31.237235] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.237536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.237873] ksys_mmap_pgoff+0x3af/0x500 [ 31.238174] do_syscall_64+0x3f/0x90 [ 31.238463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238859] RIP: 0033:0x7f4484e6fd82 [ 31.239136] 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 [ 31.240436] RSP: 002b:00007ffc89f26bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.240990] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4484e6fd82 [ 31.241492] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44842a9000 [ 31.242011] RBP: 00007f44842a9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.242532] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f318c5ec0 [ 31.243050] R13: 00007ffc89f26be0 R14: 00007ffc89f26c10 R15: 00007ffc89f26f70 [ 31.243574] [ 31.243749] [ 31.243878] Allocated by task 212: [ 31.244136] kasan_save_stack+0x22/0x50 [ 31.244438] kasan_set_track+0x25/0x30 [ 31.244730] __kasan_slab_alloc+0x59/0x70 [ 31.245045] kmem_cache_alloc+0x16b/0x370 [ 31.245350] vm_area_dup+0x20/0x160 [ 31.245625] __split_vma+0x170/0x950 [ 31.245904] split_vma+0xc6/0x110 [ 31.246167] mprotect_fixup+0x8d2/0xb30 [ 31.246467] do_mprotect_pkey+0x87e/0xd40 [ 31.246784] __x64_sys_mprotect+0x78/0xc0 [ 31.247088] do_syscall_64+0x3f/0x90 [ 31.247375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247768] [ 31.247897] Freed by task 13: [ 31.248133] kasan_save_stack+0x22/0x50 [ 31.248435] kasan_set_track+0x25/0x30 [ 31.248731] kasan_save_free_info+0x2b/0x50 [ 31.249048] __kasan_slab_free+0x10a/0x190 [ 31.249367] kmem_cache_free+0x10d/0x4d0 [ 31.249667] rcu_core+0x8c8/0x2860 [ 31.249931] __do_softirq+0x1b7/0x7d4 [ 31.250216] [ 31.250341] Last potentially related work creation: [ 31.250708] kasan_save_stack+0x22/0x50 [ 31.251008] __kasan_record_aux_stack+0x8e/0xa0 [ 31.251348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.251739] remove_vma+0x139/0x170 [ 31.252008] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.252341] do_vmi_munmap+0x1f1/0x2b0 [ 31.252629] __vm_munmap+0x138/0x3a0 [ 31.252910] __x64_sys_munmap+0x59/0x80 [ 31.253205] do_syscall_64+0x3f/0x90 [ 31.253489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253865] [ 31.253993] The buggy address belongs to the object at ffff88800e0ac0e8 [ 31.253993] which belongs to the cache vm_area_struct of size 168 [ 31.254887] The buggy address is located 88 bytes inside of [ 31.254887] freed 168-byte region [ffff88800e0ac0e8, ffff88800e0ac190) [ 31.255740] [ 31.255870] The buggy address belongs to the physical page: [ 31.256268] page:0000000058cf4f14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0ac [ 31.256914] memcg:ffff8880147eea01 [ 31.257170] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.257558] page_type: 0xffffffff() [ 31.257834] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.258394] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147eea01 [ 31.258952] page dumped because: kasan: bad access detected [ 31.259348] [ 31.259472] Memory state around the buggy address: [ 31.259817] ffff88800e0ac000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.260331] ffff88800e0ac080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.260849] >ffff88800e0ac100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.261363] ^ [ 31.261742] ffff88800e0ac180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.262258] ffff88800e0ac200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.262774] ================================================================== [ 31.263336] Disabling lock debugging due to kernel taint [ 33.161220] BUG: Bad rss-counter state mm:000000003edb14c7 type:MM_FILEPAGES val:33 [ 33.162158] BUG: Bad rss-counter state mm:000000003edb14c7 type:MM_ANONPAGES val:22 [ 33.637548] BUG: Bad rss-counter state mm:00000000884873ef type:MM_FILEPAGES val:33 [ 33.638562] BUG: Bad rss-counter state mm:00000000884873ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19051' (ECDSA) to the list of known hosts. 2023/06/20 17:20:42 fuzzer started 2023/06/20 17:20:42 dialing manager at localhost:36067 2023/06/20 17:20:42 checking machine... 2023/06/20 17:20:42 checking revisions... [ 34.338112] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:20:42 testing simple program... [ 34.392713] cgroup: Unknown subsys name 'net' [ 34.430021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:20:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002bf8ebf RCX=ffffffff83795b71 RDX=ffff888016e9b680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019eb3280 RSP=ffff888015fc75c8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000aad00000aad R12=0000000000000000 R13=0000000000000001 R14=ffff88800fb9e000 R15=ffff88800fb9e600 RIP=ffffffff814c0864 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 00007f1c22388900 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=000056350de2e954 CR3=000000000e85a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 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=00007feee3540570 CR3=000000000c6ac000 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=2032343a30323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000