syzkaller login: [ 60.287102] BUG: Bad rss-counter state mm:00000000f3f896da type:MM_FILEPAGES val:33 [ 60.288300] BUG: Bad rss-counter state mm:00000000f3f896da type:MM_ANONPAGES val:22 [ 60.445432] ================================================================== [ 60.446358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.447294] Read of size 8 at addr ffff88800d6365c8 by task sshd/220 [ 60.448064] [ 60.448463] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.449338] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.450318] Call Trace: [ 60.450663] [ 60.450949] dump_stack_lvl+0x91/0xf0 [ 60.451447] print_report+0xcc/0x620 [ 60.451938] ? __virt_addr_valid+0x102/0x340 [ 60.452523] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.453151] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.453808] kasan_report+0xbe/0xf0 [ 60.454297] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.454944] vma_interval_tree_remove+0xc75/0xec0 [ 60.455562] vma_prepare+0xc54/0x11a0 [ 60.456059] __split_vma+0x5af/0x950 [ 60.456559] ? __pfx___split_vma+0x10/0x10 [ 60.457117] ? find_held_lock+0x2c/0x110 [ 60.457655] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.458234] ? lock_is_held_type+0x9f/0x120 [ 60.458786] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.459415] ? mtree_range_walk+0x632/0x900 [ 60.459977] ? mas_walk+0x5c7/0x7c0 [ 60.460463] do_vmi_munmap+0x1f1/0x2b0 [ 60.460975] mmap_region+0x1f9/0x2660 [ 60.461476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.462002] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.462736] ? __pfx_lock_acquire+0x10/0x10 [ 60.463280] ? __pfx_mmap_region+0x10/0x10 [ 60.463812] ? security_mmap_addr+0x7d/0xa0 [ 60.464373] ? get_unmapped_area+0x1f5/0x3f0 [ 60.464931] do_mmap+0x854/0xf00 [ 60.465379] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.465885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.466457] ksys_mmap_pgoff+0x3af/0x500 [ 60.466974] do_syscall_64+0x3f/0x90 [ 60.467465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.468125] RIP: 0033:0x7fadf6f2dd82 [ 60.468602] 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 [ 60.470751] RSP: 002b:00007fff030b0688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.471675] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadf6f2dd82 [ 60.472540] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadf6367000 [ 60.473398] RBP: 00007fadf6367000 R08: 0000000000000009 R09: 0000000000001000 [ 60.474257] R10: 0000000000000812 R11: 0000000000000206 R12: 000056130f088ec0 [ 60.475115] R13: 00007fff030b06a0 R14: 00007fff030b06d0 R15: 00007fff030b0a30 [ 60.475983] [ 60.476300] [ 60.476522] Allocated by task 213: [ 60.476957] kasan_save_stack+0x22/0x50 [ 60.477466] kasan_set_track+0x25/0x30 [ 60.477963] __kasan_slab_alloc+0x59/0x70 [ 60.478500] kmem_cache_alloc+0x16b/0x370 [ 60.479023] vm_area_dup+0x20/0x160 [ 60.479495] __split_vma+0x170/0x950 [ 60.479963] split_vma+0xc6/0x110 [ 60.480425] mprotect_fixup+0x8d2/0xb30 [ 60.480938] do_mprotect_pkey+0x87e/0xd40 [ 60.481465] __x64_sys_mprotect+0x78/0xc0 [ 60.481994] do_syscall_64+0x3f/0x90 [ 60.482474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.483127] [ 60.483346] Freed by task 213: [ 60.483741] kasan_save_stack+0x22/0x50 [ 60.484261] kasan_set_track+0x25/0x30 [ 60.484767] kasan_save_free_info+0x2b/0x50 [ 60.485304] __kasan_slab_free+0x10a/0x190 [ 60.485845] kmem_cache_free+0x10d/0x4d0 [ 60.486360] rcu_core+0x8c8/0x2860 [ 60.486811] __do_softirq+0x1b7/0x7d4 [ 60.487300] [ 60.487521] Last potentially related work creation: [ 60.488119] kasan_save_stack+0x22/0x50 [ 60.488659] __kasan_record_aux_stack+0x8e/0xa0 [ 60.489249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.489999] remove_vma+0x139/0x170 [ 60.490463] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.491030] do_vmi_munmap+0x1f1/0x2b0 [ 60.491521] __vm_munmap+0x138/0x3a0 [ 60.492005] __x64_sys_munmap+0x59/0x80 [ 60.492523] do_syscall_64+0x3f/0x90 [ 60.493018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.493680] [ 60.493900] Second to last potentially related work creation: [ 60.494595] kasan_save_stack+0x22/0x50 [ 60.495116] __kasan_record_aux_stack+0x8e/0xa0 [ 60.495707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.496395] remove_vma+0x139/0x170 [ 60.496861] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.497422] do_vmi_munmap+0x1f1/0x2b0 [ 60.497921] mmap_region+0x1f9/0x2660 [ 60.498407] do_mmap+0x854/0xf00 [ 60.498840] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.499340] ksys_mmap_pgoff+0x3af/0x500 [ 60.499849] do_syscall_64+0x3f/0x90 [ 60.500358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.501019] [ 60.501238] The buggy address belongs to the object at ffff88800d636570 [ 60.501238] which belongs to the cache vm_area_struct of size 168 [ 60.502728] The buggy address is located 88 bytes inside of [ 60.502728] freed 168-byte region [ffff88800d636570, ffff88800d636618) [ 60.504177] [ 60.504405] The buggy address belongs to the physical page: [ 60.505109] page:00000000dd22cc43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd636 [ 60.506269] memcg:ffff88800d3a3101 [ 60.506727] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.507421] page_type: 0xffffffff() [ 60.507900] raw: 0100000000000200 ffff8880087a0c80 ffffea000036bd00 dead000000000008 [ 60.508915] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3a3101 [ 60.509873] page dumped because: kasan: bad access detected [ 60.510582] [ 60.510807] Memory state around the buggy address: [ 60.511417] ffff88800d636480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.512342] ffff88800d636500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 60.513258] >ffff88800d636580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.514174] ^ [ 60.514892] ffff88800d636600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 60.515795] ffff88800d636680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.516701] ================================================================== [ 60.517678] Disabling lock debugging due to kernel taint [ 62.871097] BUG: Bad rss-counter state mm:00000000c311f0b5 type:MM_FILEPAGES val:33 [ 62.872656] BUG: Bad rss-counter state mm:00000000c311f0b5 type:MM_ANONPAGES val:22 [ 63.428252] BUG: Bad rss-counter state mm:000000003f1d3cee type:MM_FILEPAGES val:33 [ 63.429440] BUG: Bad rss-counter state mm:000000003f1d3cee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38157' (ECDSA) to the list of known hosts. 2023/06/20 22:58:10 fuzzer started 2023/06/20 22:58:10 dialing manager at localhost:36067 2023/06/20 22:58:10 checking machine... 2023/06/20 22:58:10 checking revisions... [ 64.068089] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:58:11 testing simple program... [ 64.120770] cgroup: Unknown subsys name 'net' [ 64.175975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:58:10 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=00007f2eee481510 CR3=0000000019df8000 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=2030313a38353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019d674e0 RCX=ffffffff86139701 RDX=1ffff110033ace9c RSI=ffffffff8180ca5a RDI=ffff888019d674ec RBP=0000000000000003 RSP=ffff888019d673f8 R8 =ffffffff86139748 R9 =ffff888019d67458 R10=0000000000038001 R11=0000000000020f03 R12=ffff888019d674e0 R13=0000000000000000 R14=ffff888016fdd1c0 R15=0000000000000000 RIP=ffffffff813ad51f 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 00007fdebf8b2900 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=00007ffd56dc3000 CR3=0000000015962000 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=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