syzkaller login: [ 38.508168] BUG: Bad rss-counter state mm:00000000b2c1f3a2 type:MM_FILEPAGES val:33 [ 38.509026] BUG: Bad rss-counter state mm:00000000b2c1f3a2 type:MM_ANONPAGES val:22 [ 38.637923] ================================================================== [ 38.638531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.639151] Read of size 8 at addr ffff88800dd92df0 by task sshd/221 [ 38.639660] [ 38.639822] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.640382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.641016] Call Trace: [ 38.641225] [ 38.641413] dump_stack_lvl+0x91/0xf0 [ 38.641738] print_report+0xcc/0x620 [ 38.642064] ? __virt_addr_valid+0x102/0x340 [ 38.642421] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.642820] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.643218] kasan_report+0xbe/0xf0 [ 38.643582] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.643953] vma_interval_tree_remove+0xc75/0xec0 [ 38.644336] vma_prepare+0xc54/0x11a0 [ 38.644653] __split_vma+0x5af/0x950 [ 38.644962] ? __pfx___split_vma+0x10/0x10 [ 38.645310] ? find_held_lock+0x2c/0x110 [ 38.645656] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.646027] ? lock_is_held_type+0x9f/0x120 [ 38.646383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.646781] ? mtree_range_walk+0x632/0x900 [ 38.647154] ? mas_walk+0x5c7/0x7c0 [ 38.647502] do_vmi_munmap+0x1f1/0x2b0 [ 38.647827] mmap_region+0x1f9/0x2660 [ 38.648147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.648485] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.648950] ? __pfx_lock_acquire+0x10/0x10 [ 38.649301] ? __pfx_mmap_region+0x10/0x10 [ 38.649651] ? security_mmap_addr+0x7d/0xa0 [ 38.650000] ? get_unmapped_area+0x1f5/0x3f0 [ 38.650360] do_mmap+0x854/0xf00 [ 38.650652] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.650980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.651349] ksys_mmap_pgoff+0x3af/0x500 [ 38.651718] do_syscall_64+0x3f/0x90 [ 38.652034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.652461] RIP: 0033:0x7fcffbbe1d82 [ 38.652762] 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 [ 38.654122] RSP: 002b:00007ffdac254308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.654707] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcffbbe1d82 [ 38.655258] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcffb01b000 [ 38.655847] RBP: 00007fcffb01b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.656393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055754c5ced90 [ 38.656937] R13: 00007ffdac254320 R14: 00007ffdac254350 R15: 00007ffdac2546b0 [ 38.657467] [ 38.657662] [ 38.657807] Allocated by task 214: [ 38.658091] kasan_save_stack+0x22/0x50 [ 38.658430] kasan_set_track+0x25/0x30 [ 38.658758] __kasan_slab_alloc+0x59/0x70 [ 38.659102] kmem_cache_alloc+0x16b/0x370 [ 38.659473] vm_area_dup+0x20/0x160 [ 38.659782] __split_vma+0x170/0x950 [ 38.660091] split_vma+0xc6/0x110 [ 38.660381] mprotect_fixup+0x8d2/0xb30 [ 38.660714] do_mprotect_pkey+0x87e/0xd40 [ 38.661057] __x64_sys_mprotect+0x78/0xc0 [ 38.661400] do_syscall_64+0x3f/0x90 [ 38.661716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.662137] [ 38.662280] Freed by task 214: [ 38.662535] kasan_save_stack+0x22/0x50 [ 38.662865] kasan_set_track+0x25/0x30 [ 38.663190] kasan_save_free_info+0x2b/0x50 [ 38.663625] __kasan_slab_free+0x10a/0x190 [ 38.663976] kmem_cache_free+0x10d/0x4d0 [ 38.664309] rcu_core+0x8c8/0x2860 [ 38.664603] __do_softirq+0x1b7/0x7d4 [ 38.664920] [ 38.665064] Last potentially related work creation: [ 38.665440] kasan_save_stack+0x22/0x50 [ 38.665772] __kasan_record_aux_stack+0x8e/0xa0 [ 38.666145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.666566] remove_vma+0x139/0x170 [ 38.666863] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.667228] do_vmi_munmap+0x1f1/0x2b0 [ 38.667589] __vm_munmap+0x138/0x3a0 [ 38.667885] __x64_sys_munmap+0x59/0x80 [ 38.668196] do_syscall_64+0x3f/0x90 [ 38.668497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.668900] [ 38.669034] Second to last potentially related work creation: [ 38.669452] kasan_save_stack+0x22/0x50 [ 38.669766] __kasan_record_aux_stack+0x8e/0xa0 [ 38.670120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.670519] remove_vma+0x139/0x170 [ 38.670801] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.671147] do_vmi_munmap+0x1f1/0x2b0 [ 38.672830] __vm_munmap+0x138/0x3a0 [ 38.673139] __x64_sys_munmap+0x59/0x80 [ 38.673466] do_syscall_64+0x3f/0x90 [ 38.673785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.674179] [ 38.674308] The buggy address belongs to the object at ffff88800dd92d98 [ 38.674308] which belongs to the cache vm_area_struct of size 168 [ 38.675232] The buggy address is located 88 bytes inside of [ 38.675232] freed 168-byte region [ffff88800dd92d98, ffff88800dd92e40) [ 38.676238] [ 38.676384] The buggy address belongs to the physical page: [ 38.676812] page:000000006015dc77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd92 [ 38.677512] memcg:ffff888013a8e801 [ 38.677792] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.678249] page_type: 0xffffffff() [ 38.678547] raw: 0100000000000200 ffff8880087a0c80 ffffea0000377580 dead000000000003 [ 38.679138] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013a8e801 [ 38.679749] page dumped because: kasan: bad access detected [ 38.680175] [ 38.680318] Memory state around the buggy address: [ 38.680691] ffff88800dd92c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.681240] ffff88800dd92d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.681788] >ffff88800dd92d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.682332] ^ [ 38.682852] ffff88800dd92e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.683533] ffff88800dd92e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.684094] ================================================================== [ 38.685192] Disabling lock debugging due to kernel taint [ 42.348812] BUG: Bad rss-counter state mm:00000000e478ed63 type:MM_FILEPAGES val:33 [ 42.350135] BUG: Bad rss-counter state mm:00000000e478ed63 type:MM_ANONPAGES val:22 [ 43.111163] BUG: Bad rss-counter state mm:00000000d60caf13 type:MM_FILEPAGES val:33 [ 43.112597] BUG: Bad rss-counter state mm:00000000d60caf13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10341' (ECDSA) to the list of known hosts. 2023/06/21 08:05:32 fuzzer started 2023/06/21 08:05:32 dialing manager at localhost:36067 2023/06/21 08:05:32 checking machine... 2023/06/21 08:05:32 checking revisions... [ 44.111555] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:05:32 testing simple program... [ 44.177956] cgroup: Unknown subsys name 'net' [ 44.235141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:05:32 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=00007f98b6f71328 CR3=000000000ed5a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fe29d9d12a0 CR3=000000000f2f8000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=ba2a2f87c53770ac0000000000134838 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=835be6bc65baf2eb00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000