syzkaller login: [ 38.696257] BUG: Bad rss-counter state mm:00000000ec77bed7 type:MM_FILEPAGES val:33 [ 38.697694] BUG: Bad rss-counter state mm:00000000ec77bed7 type:MM_ANONPAGES val:22 [ 38.849892] ================================================================== [ 38.850833] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.851780] Read of size 8 at addr ffff88800ecded08 by task sshd/219 [ 38.852667] [ 38.852886] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.853775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.854778] Call Trace: [ 38.855099] [ 38.855387] dump_stack_lvl+0x91/0xf0 [ 38.855879] print_report+0xcc/0x620 [ 38.856368] ? __virt_addr_valid+0x102/0x340 [ 38.856921] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857563] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858211] kasan_report+0xbe/0xf0 [ 38.858704] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859330] vma_interval_tree_remove+0xc75/0xec0 [ 38.859932] vma_prepare+0xc54/0x11a0 [ 38.860418] __split_vma+0x5af/0x950 [ 38.860887] ? __pfx___split_vma+0x10/0x10 [ 38.861417] ? find_held_lock+0x2c/0x110 [ 38.861958] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.862524] ? lock_is_held_type+0x9f/0x120 [ 38.863062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.863684] ? mtree_range_walk+0x632/0x900 [ 38.864251] ? mas_walk+0x5c7/0x7c0 [ 38.864724] do_vmi_munmap+0x1f1/0x2b0 [ 38.865214] mmap_region+0x1f9/0x2660 [ 38.865699] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.866213] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.866930] ? __pfx_lock_acquire+0x10/0x10 [ 38.867465] ? __pfx_mmap_region+0x10/0x10 [ 38.867993] ? security_mmap_addr+0x7d/0xa0 [ 38.868541] ? get_unmapped_area+0x1f5/0x3f0 [ 38.869096] do_mmap+0x854/0xf00 [ 38.869555] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.870056] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.870615] ksys_mmap_pgoff+0x3af/0x500 [ 38.871124] do_syscall_64+0x3f/0x90 [ 38.871601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.872249] RIP: 0033:0x7f9b8685ed82 [ 38.872713] 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 [ 38.874860] RSP: 002b:00007ffe8c41fce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.875762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b8685ed82 [ 38.876610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b85c98000 [ 38.877462] RBP: 00007f9b85c98000 R08: 0000000000000009 R09: 0000000000001000 [ 38.878313] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563cd1390d90 [ 38.879158] R13: 00007ffe8c41fd00 R14: 00007ffe8c41fd30 R15: 00007ffe8c420090 [ 38.880023] [ 38.880316] [ 38.880534] Allocated by task 212: [ 38.880959] kasan_save_stack+0x22/0x50 [ 38.881469] kasan_set_track+0x25/0x30 [ 38.881972] __kasan_slab_alloc+0x59/0x70 [ 38.882496] kmem_cache_alloc+0x16b/0x370 [ 38.883017] vm_area_dup+0x20/0x160 [ 38.883477] __split_vma+0x170/0x950 [ 38.883945] split_vma+0xc6/0x110 [ 38.884397] mprotect_fixup+0x8d2/0xb30 [ 38.884903] do_mprotect_pkey+0x87e/0xd40 [ 38.885432] __x64_sys_mprotect+0x78/0xc0 [ 38.885959] do_syscall_64+0x3f/0x90 [ 38.886439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887083] [ 38.887298] Freed by task 212: [ 38.887694] kasan_save_stack+0x22/0x50 [ 38.888196] kasan_set_track+0x25/0x30 [ 38.888687] kasan_save_free_info+0x2b/0x50 [ 38.889235] __kasan_slab_free+0x10a/0x190 [ 38.889785] kmem_cache_free+0x10d/0x4d0 [ 38.890291] rcu_core+0x8c8/0x2860 [ 38.890725] __do_softirq+0x1b7/0x7d4 [ 38.891199] [ 38.891417] Last potentially related work creation: [ 38.891989] kasan_save_stack+0x22/0x50 [ 38.892496] __kasan_record_aux_stack+0x8e/0xa0 [ 38.893068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.893732] remove_vma+0x139/0x170 [ 38.894183] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.894751] do_vmi_munmap+0x1f1/0x2b0 [ 38.895239] __vm_munmap+0x138/0x3a0 [ 38.895705] __x64_sys_munmap+0x59/0x80 [ 38.896195] do_syscall_64+0x3f/0x90 [ 38.896673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897314] [ 38.897538] Second to last potentially related work creation: [ 38.898226] kasan_save_stack+0x22/0x50 [ 38.898726] __kasan_record_aux_stack+0x8e/0xa0 [ 38.899295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.899934] remove_vma+0x139/0x170 [ 38.900383] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.900941] do_vmi_munmap+0x1f1/0x2b0 [ 38.901431] mmap_region+0x1f9/0x2660 [ 38.901938] do_mmap+0x854/0xf00 [ 38.902365] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902857] ksys_mmap_pgoff+0x7d/0x500 [ 38.903352] do_syscall_64+0x3f/0x90 [ 38.903831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904479] [ 38.904696] The buggy address belongs to the object at ffff88800ecdecb0 [ 38.904696] which belongs to the cache vm_area_struct of size 168 [ 38.906187] The buggy address is located 88 bytes inside of [ 38.906187] freed 168-byte region [ffff88800ecdecb0, ffff88800ecded58) [ 38.907574] [ 38.907793] The buggy address belongs to the physical page: [ 38.908443] page:000000007024296f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecde [ 38.909542] memcg:ffff88800ed25a01 [ 38.909972] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.910614] page_type: 0xffffffff() [ 38.911064] raw: 0100000000000200 ffff8880087a0c80 ffffea000039cc00 dead000000000008 [ 38.911985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed25a01 [ 38.912891] page dumped because: kasan: bad access detected [ 38.913573] [ 38.913791] Memory state around the buggy address: [ 38.914369] ffff88800ecdec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.915232] ffff88800ecdec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.916089] >ffff88800ecded00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.916944] ^ [ 38.917401] ffff88800ecded80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.918269] ffff88800ecdee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.919111] ================================================================== [ 38.920099] Disabling lock debugging due to kernel taint [ 40.708229] BUG: Bad rss-counter state mm:0000000060face9f type:MM_FILEPAGES val:33 [ 40.709535] BUG: Bad rss-counter state mm:0000000060face9f type:MM_ANONPAGES val:22 [ 41.182176] BUG: Bad rss-counter state mm:00000000d24511de type:MM_FILEPAGES val:33 [ 41.183199] BUG: Bad rss-counter state mm:00000000d24511de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1662' (ECDSA) to the list of known hosts. 2023/06/21 02:36:49 fuzzer started 2023/06/21 02:36:50 dialing manager at localhost:36067 2023/06/21 02:36:50 checking machine... 2023/06/21 02:36:50 checking revisions... [ 41.913377] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:36:50 testing simple program... [ 41.965646] cgroup: Unknown subsys name 'net' [ 42.046823] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:49 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffea0000687e00 RDX=0000000000000000 RSI=ffff88801a1f8000 RDI=0000000000000130 RBP=ffffffff813782f8 RSP=ffff88806ce09e08 R8 =0000000000000130 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88801a1f8130 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88801a1f81b0 RIP=ffffffff8180c9ea RFL=00000212 [----A--] 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 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=00007ff0eee02030 CR3=000000000d5e8000 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=c162ccf06e5bfd88ec4d328c4de07df0 XMM02=2c67c8bc2e329bc3000000000011adc8 XMM03=fb795ef6d65770560000000000121768 XMM04=7c8b88493b1d762200000000000ae988 XMM05=dfcdbad4f1609c370000000000132678 XMM06=24d07a093ff559370000000000131850 XMM07=e042d86d42eb936e00000000001219e8 XMM08=2f8de484251c33f0000000000011ae28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f79f0f14366 RCX=ffffffff81007b62 RDX=ffff8880094e9b40 RSI=0000000000000001 RDI=0000000000000002 RBP=0000000000000001 RSP=ffff888016ef74e0 R8 =ffffffff864bbb58 R9 =ffff888016ef75a0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888016ef7628 R13=0000000000000000 R14=ffff8880094e9b40 R15=ffff88801bc1f000 RIP=ffffffff814c0408 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 00007f79f0a21900 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=00007ffdd0376000 CR3=000000000ef2e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000