syzkaller login: [ 38.715278] BUG: Bad rss-counter state mm:0000000054681988 type:MM_FILEPAGES val:33 [ 38.716294] BUG: Bad rss-counter state mm:0000000054681988 type:MM_ANONPAGES val:22 [ 38.886656] ================================================================== [ 38.887735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.888990] Read of size 8 at addr ffff88800e23c228 by task sshd/220 [ 38.889859] [ 38.890078] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.890970] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.891948] Call Trace: [ 38.892259] [ 38.892543] dump_stack_lvl+0x91/0xf0 [ 38.893051] print_report+0xcc/0x620 [ 38.893527] ? __virt_addr_valid+0x102/0x340 [ 38.894086] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894695] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895302] kasan_report+0xbe/0xf0 [ 38.895776] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896394] vma_interval_tree_remove+0xc75/0xec0 [ 38.897014] vma_prepare+0xc54/0x11a0 [ 38.897486] __split_vma+0x5af/0x950 [ 38.897950] ? __pfx___split_vma+0x10/0x10 [ 38.898472] ? find_held_lock+0x2c/0x110 [ 38.898987] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.899545] ? lock_is_held_type+0x9f/0x120 [ 38.900083] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.900686] ? mtree_range_walk+0x632/0x900 [ 38.901232] ? mas_walk+0x5c7/0x7c0 [ 38.901705] do_vmi_munmap+0x1f1/0x2b0 [ 38.902200] mmap_region+0x1f9/0x2660 [ 38.902685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.903196] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.903900] ? __pfx_lock_acquire+0x10/0x10 [ 38.904423] ? __pfx_mmap_region+0x10/0x10 [ 38.904963] ? security_mmap_addr+0x7d/0xa0 [ 38.905490] ? get_unmapped_area+0x1f5/0x3f0 [ 38.906040] do_mmap+0x854/0xf00 [ 38.906470] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.906957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.907515] ksys_mmap_pgoff+0x3af/0x500 [ 38.908016] do_syscall_64+0x3f/0x90 [ 38.908491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.909142] RIP: 0033:0x7ff2f981ed82 [ 38.909589] 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 [ 38.911666] RSP: 002b:00007ffd128279a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.912557] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2f981ed82 [ 38.913403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2f8c58000 [ 38.914256] RBP: 00007ff2f8c58000 R08: 0000000000000009 R09: 0000000000001000 [ 38.915091] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e110d44b20 [ 38.915931] R13: 00007ffd128279c0 R14: 00007ffd128279f0 R15: 00007ffd12827d50 [ 38.916780] [ 38.917073] [ 38.917286] Allocated by task 213: [ 38.917719] kasan_save_stack+0x22/0x50 [ 38.918228] kasan_set_track+0x25/0x30 [ 38.918722] __kasan_slab_alloc+0x59/0x70 [ 38.919247] kmem_cache_alloc+0x16b/0x370 [ 38.919770] vm_area_dup+0x20/0x160 [ 38.920219] __split_vma+0x170/0x950 [ 38.920714] split_vma+0xc6/0x110 [ 38.921156] mprotect_fixup+0x8d2/0xb30 [ 38.921654] do_mprotect_pkey+0x87e/0xd40 [ 38.922169] __x64_sys_mprotect+0x78/0xc0 [ 38.922689] do_syscall_64+0x3f/0x90 [ 38.923166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923806] [ 38.924020] Freed by task 204: [ 38.924408] kasan_save_stack+0x22/0x50 [ 38.924917] kasan_set_track+0x25/0x30 [ 38.925408] kasan_save_free_info+0x2b/0x50 [ 38.925940] __kasan_slab_free+0x10a/0x190 [ 38.926463] kmem_cache_free+0x10d/0x4d0 [ 38.926973] rcu_core+0x8c8/0x2860 [ 38.927415] __do_softirq+0x1b7/0x7d4 [ 38.927908] [ 38.928124] Last potentially related work creation: [ 38.928708] kasan_save_stack+0x22/0x50 [ 38.929208] __kasan_record_aux_stack+0x8e/0xa0 [ 38.929771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.930416] remove_vma+0x139/0x170 [ 38.930870] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.931427] do_vmi_munmap+0x1f1/0x2b0 [ 38.931912] __vm_munmap+0x138/0x3a0 [ 38.932383] __x64_sys_munmap+0x59/0x80 [ 38.932894] do_syscall_64+0x3f/0x90 [ 38.933371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934009] [ 38.934225] Second to last potentially related work creation: [ 38.934892] kasan_save_stack+0x22/0x50 [ 38.935394] __kasan_record_aux_stack+0x8e/0xa0 [ 38.935959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.936600] remove_vma+0x139/0x170 [ 38.937060] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.937610] do_vmi_munmap+0x1f1/0x2b0 [ 38.938095] mmap_region+0x1f9/0x2660 [ 38.938570] do_mmap+0x854/0xf00 [ 38.938998] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.939485] ksys_mmap_pgoff+0x3af/0x500 [ 38.939985] do_syscall_64+0x3f/0x90 [ 38.940455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941108] [ 38.941323] The buggy address belongs to the object at ffff88800e23c1d0 [ 38.941323] which belongs to the cache vm_area_struct of size 168 [ 38.942757] The buggy address is located 88 bytes inside of [ 38.942757] freed 168-byte region [ffff88800e23c1d0, ffff88800e23c278) [ 38.944146] [ 38.944359] The buggy address belongs to the physical page: [ 38.945043] page:00000000a4c48a8e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe23c [ 38.946123] memcg:ffff88800dee6101 [ 38.946548] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.947201] page_type: 0xffffffff() [ 38.947649] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f2c0 dead000000000004 [ 38.948562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee6101 [ 38.949487] page dumped because: kasan: bad access detected [ 38.950154] [ 38.950371] Memory state around the buggy address: [ 38.950947] ffff88800e23c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.951811] ffff88800e23c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.952689] >ffff88800e23c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.953548] ^ [ 38.954106] ffff88800e23c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.954962] ffff88800e23c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.955819] ================================================================== [ 38.957070] Disabling lock debugging due to kernel taint [ 40.962181] BUG: Bad rss-counter state mm:000000009e9e09e9 type:MM_FILEPAGES val:33 [ 40.963731] BUG: Bad rss-counter state mm:000000009e9e09e9 type:MM_ANONPAGES val:22 [ 41.372252] BUG: Bad rss-counter state mm:000000008852796a type:MM_FILEPAGES val:33 [ 41.373733] BUG: Bad rss-counter state mm:000000008852796a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51420' (ECDSA) to the list of known hosts. 2023/06/20 15:12:50 fuzzer started 2023/06/20 15:12:50 dialing manager at localhost:36067 2023/06/20 15:12:50 checking machine... 2023/06/20 15:12:50 checking revisions... [ 42.086210] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:12:50 testing simple program... [ 42.138171] cgroup: Unknown subsys name 'net' [ 42.180992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:12:50 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002ceef40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818f6c7a RDI=ffff888015e383f4 RBP=ffff888008c15080 RSP=ffff8880167779c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888016777a20 R13=dffffc0000000000 R14=0000000000008000 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 00007f4be6db6900 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=00007f4be736e0b0 CR3=0000000015e40000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffc21afcc38 CR3=000000000eade000 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=2030353a32313a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a32313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000