syzkaller login: [ 30.422216] BUG: Bad rss-counter state mm:0000000096b184cf type:MM_FILEPAGES val:33 [ 30.423223] BUG: Bad rss-counter state mm:0000000096b184cf type:MM_ANONPAGES val:22 [ 30.596861] ================================================================== [ 30.597844] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.598855] Read of size 8 at addr ffff888015e1e140 by task sshd/221 [ 30.599694] [ 30.600009] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.600940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.602029] Call Trace: [ 30.602375] [ 30.602686] dump_stack_lvl+0x91/0xf0 [ 30.603213] print_report+0xcc/0x620 [ 30.603741] ? __virt_addr_valid+0x102/0x340 [ 30.604346] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.605010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.605685] kasan_report+0xbe/0xf0 [ 30.606202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.606877] vma_interval_tree_remove+0xc75/0xec0 [ 30.607525] vma_prepare+0xc54/0x11a0 [ 30.608042] __split_vma+0x5af/0x950 [ 30.608555] ? __pfx___split_vma+0x10/0x10 [ 30.609135] ? find_held_lock+0x2c/0x110 [ 30.609720] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.610335] ? lock_is_held_type+0x9f/0x120 [ 30.610927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.611597] ? mtree_range_walk+0x632/0x900 [ 30.612191] ? mas_walk+0x5c7/0x7c0 [ 30.612710] do_vmi_munmap+0x1f1/0x2b0 [ 30.613253] mmap_region+0x1f9/0x2660 [ 30.613805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.614354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.615141] ? __pfx_lock_acquire+0x10/0x10 [ 30.615735] ? __pfx_mmap_region+0x10/0x10 [ 30.616317] ? security_mmap_addr+0x7d/0xa0 [ 30.616901] ? get_unmapped_area+0x1f5/0x3f0 [ 30.617493] do_mmap+0x854/0xf00 [ 30.617979] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.618529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.619143] ksys_mmap_pgoff+0x3af/0x500 [ 30.619686] do_syscall_64+0x3f/0x90 [ 30.620206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.620909] RIP: 0033:0x7fb1480cdd82 [ 30.621397] 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 [ 30.623765] RSP: 002b:00007ffc42120aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.624751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1480cdd82 [ 30.625715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb147507000 [ 30.626649] RBP: 00007fb147507000 R08: 0000000000000009 R09: 0000000000001000 [ 30.627569] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ca829fec0 [ 30.628487] R13: 00007ffc42120ac0 R14: 00007ffc42120af0 R15: 00007ffc42120e50 [ 30.629434] [ 30.629774] [ 30.630012] Allocated by task 214: [ 30.630475] kasan_save_stack+0x22/0x50 [ 30.631021] kasan_set_track+0x25/0x30 [ 30.631565] __kasan_slab_alloc+0x59/0x70 [ 30.632136] kmem_cache_alloc+0x16b/0x370 [ 30.632703] vm_area_dup+0x20/0x160 [ 30.633197] __split_vma+0x170/0x950 [ 30.633721] split_vma+0xc6/0x110 [ 30.634200] mprotect_fixup+0x8d2/0xb30 [ 30.634754] do_mprotect_pkey+0x87e/0xd40 [ 30.635322] __x64_sys_mprotect+0x78/0xc0 [ 30.635895] do_syscall_64+0x3f/0x90 [ 30.636414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.637128] [ 30.637364] Freed by task 203: [ 30.637812] kasan_save_stack+0x22/0x50 [ 30.638350] kasan_set_track+0x25/0x30 [ 30.638889] kasan_save_free_info+0x2b/0x50 [ 30.639470] __kasan_slab_free+0x10a/0x190 [ 30.640045] kmem_cache_free+0x10d/0x4d0 [ 30.640605] rcu_core+0x8c8/0x2860 [ 30.641096] __do_softirq+0x1b7/0x7d4 [ 30.641636] [ 30.641857] Last potentially related work creation: [ 30.642440] kasan_save_stack+0x22/0x50 [ 30.642948] __kasan_record_aux_stack+0x8e/0xa0 [ 30.643521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.644155] remove_vma+0x139/0x170 [ 30.644611] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.645170] do_vmi_munmap+0x1f1/0x2b0 [ 30.645669] __vm_munmap+0x138/0x3a0 [ 30.646141] __x64_sys_munmap+0x59/0x80 [ 30.646643] do_syscall_64+0x3f/0x90 [ 30.647111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.647758] [ 30.647974] The buggy address belongs to the object at ffff888015e1e0e8 [ 30.647974] which belongs to the cache vm_area_struct of size 168 [ 30.649423] The buggy address is located 88 bytes inside of [ 30.649423] freed 168-byte region [ffff888015e1e0e8, ffff888015e1e190) [ 30.650864] [ 30.651110] The buggy address belongs to the physical page: [ 30.651841] page:0000000047e69e34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e1e [ 30.653036] memcg:ffff88800f628401 [ 30.653504] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.654235] page_type: 0xffffffff() [ 30.654726] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.655737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f628401 [ 30.656719] page dumped because: kasan: bad access detected [ 30.657442] [ 30.657694] Memory state around the buggy address: [ 30.658329] ffff888015e1e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.659264] ffff888015e1e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.660201] >ffff888015e1e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.661133] ^ [ 30.661853] ffff888015e1e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.662801] ffff888015e1e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.663747] ================================================================== [ 30.664805] Disabling lock debugging due to kernel taint [ 32.506657] BUG: Bad rss-counter state mm:00000000fa55bea4 type:MM_FILEPAGES val:33 [ 32.507658] BUG: Bad rss-counter state mm:00000000fa55bea4 type:MM_ANONPAGES val:22 [ 32.925086] BUG: Bad rss-counter state mm:0000000064e3d311 type:MM_FILEPAGES val:33 [ 32.926692] BUG: Bad rss-counter state mm:0000000064e3d311 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61121' (ECDSA) to the list of known hosts. 2023/06/20 16:46:30 fuzzer started 2023/06/20 16:46:30 dialing manager at localhost:36067 2023/06/20 16:46:30 checking machine... 2023/06/20 16:46:30 checking revisions... [ 33.638416] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:46:30 testing simple program... [ 33.692342] cgroup: Unknown subsys name 'net' [ 33.742633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:46:29 Registers: info registers vcpu 0 RAX=000000168f7fa8d8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000052e2d RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ed433 R11=00000000000b6a61 R12=0000000000052e2d R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000013 [----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 00007fe9d6828700 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=00007f9d76886618 CR3=0000000015f6a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732039323a3634 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363836 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fdeaafe38c0 CR3=0000000015f6a000 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=2039323a36343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a36343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000