syzkaller login: [ 30.616429] BUG: Bad rss-counter state mm:00000000806758b2 type:MM_FILEPAGES val:33 [ 30.617628] BUG: Bad rss-counter state mm:00000000806758b2 type:MM_ANONPAGES val:22 [ 30.695788] ================================================================== [ 30.696672] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.697640] Read of size 8 at addr ffff88801a05a310 by task sshd/221 [ 30.698370] [ 30.698602] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.699536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.700469] Call Trace: [ 30.700794] [ 30.701071] dump_stack_lvl+0x91/0xf0 [ 30.701586] print_report+0xcc/0x620 [ 30.702052] ? __virt_addr_valid+0x102/0x340 [ 30.702615] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.703248] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.703896] kasan_report+0xbe/0xf0 [ 30.704402] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705085] vma_interval_tree_remove+0xc75/0xec0 [ 30.705728] vma_prepare+0xc54/0x11a0 [ 30.706220] __split_vma+0x5af/0x950 [ 30.706735] ? __pfx___split_vma+0x10/0x10 [ 30.707290] ? find_held_lock+0x2c/0x110 [ 30.707866] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.708488] ? lock_is_held_type+0x9f/0x120 [ 30.709062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.709716] ? mtree_range_walk+0x632/0x900 [ 30.710298] ? mas_walk+0x5c7/0x7c0 [ 30.710817] do_vmi_munmap+0x1f1/0x2b0 [ 30.711354] mmap_region+0x1f9/0x2660 [ 30.711868] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.712377] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.713177] ? __pfx_lock_acquire+0x10/0x10 [ 30.713749] ? __pfx_mmap_region+0x10/0x10 [ 30.714300] ? security_mmap_addr+0x7d/0xa0 [ 30.714895] ? get_unmapped_area+0x1f5/0x3f0 [ 30.715481] do_mmap+0x854/0xf00 [ 30.715939] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.716484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.717091] ksys_mmap_pgoff+0x3af/0x500 [ 30.717634] do_syscall_64+0x3f/0x90 [ 30.718128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718827] RIP: 0033:0x7fa9f9ce1d82 [ 30.719293] 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 [ 30.721638] RSP: 002b:00007ffe9c6f8128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.722680] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9f9ce1d82 [ 30.723581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9f911b000 [ 30.724478] RBP: 00007fa9f911b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.725396] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560da90b5ec0 [ 30.726318] R13: 00007ffe9c6f8140 R14: 00007ffe9c6f8170 R15: 00007ffe9c6f84d0 [ 30.727227] [ 30.727557] [ 30.727787] Allocated by task 214: [ 30.728230] kasan_save_stack+0x22/0x50 [ 30.728786] kasan_set_track+0x25/0x30 [ 30.729296] __kasan_slab_alloc+0x59/0x70 [ 30.729857] kmem_cache_alloc+0x16b/0x370 [ 30.730403] vm_area_dup+0x20/0x160 [ 30.730921] __split_vma+0x170/0x950 [ 30.731412] split_vma+0xc6/0x110 [ 30.731887] mprotect_fixup+0x8d2/0xb30 [ 30.732420] do_mprotect_pkey+0x87e/0xd40 [ 30.733004] __x64_sys_mprotect+0x78/0xc0 [ 30.733589] do_syscall_64+0x3f/0x90 [ 30.734099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734802] [ 30.735024] Freed by task 19: [ 30.735431] kasan_save_stack+0x22/0x50 [ 30.735981] kasan_set_track+0x25/0x30 [ 30.736506] kasan_save_free_info+0x2b/0x50 [ 30.737071] __kasan_slab_free+0x10a/0x190 [ 30.737644] kmem_cache_free+0x10d/0x4d0 [ 30.738178] rcu_core+0x8c8/0x2860 [ 30.738652] __do_softirq+0x1b7/0x7d4 [ 30.739136] [ 30.739363] Last potentially related work creation: [ 30.739994] kasan_save_stack+0x22/0x50 [ 30.740536] __kasan_record_aux_stack+0x8e/0xa0 [ 30.741163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.741877] remove_vma+0x139/0x170 [ 30.742348] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.742927] do_vmi_munmap+0x1f1/0x2b0 [ 30.743443] __vm_munmap+0x138/0x3a0 [ 30.743949] __x64_sys_munmap+0x59/0x80 [ 30.744495] do_syscall_64+0x3f/0x90 [ 30.745004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745709] [ 30.745938] The buggy address belongs to the object at ffff88801a05a2b8 [ 30.745938] which belongs to the cache vm_area_struct of size 168 [ 30.747547] The buggy address is located 88 bytes inside of [ 30.747547] freed 168-byte region [ffff88801a05a2b8, ffff88801a05a360) [ 30.749083] [ 30.749298] The buggy address belongs to the physical page: [ 30.750021] page:00000000d1136b83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a05a [ 30.751200] memcg:ffff88800ff31901 [ 30.751656] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.752342] page_type: 0xffffffff() [ 30.752856] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.753843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff31901 [ 30.754822] page dumped because: kasan: bad access detected [ 30.755530] [ 30.755757] Memory state around the buggy address: [ 30.756365] ffff88801a05a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.757293] ffff88801a05a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.758236] >ffff88801a05a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.759149] ^ [ 30.759661] ffff88801a05a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.760582] ffff88801a05a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.761538] ================================================================== [ 30.762568] Disabling lock debugging due to kernel taint [ 32.586501] BUG: Bad rss-counter state mm:000000002f0ded57 type:MM_FILEPAGES val:33 [ 32.587683] BUG: Bad rss-counter state mm:000000002f0ded57 type:MM_ANONPAGES val:22 [ 33.075685] BUG: Bad rss-counter state mm:00000000772e4425 type:MM_FILEPAGES val:33 [ 33.076448] BUG: Bad rss-counter state mm:00000000772e4425 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54393' (ECDSA) to the list of known hosts. 2023/06/21 02:36:37 fuzzer started 2023/06/21 02:36:37 dialing manager at localhost:36067 2023/06/21 02:36:37 checking machine... 2023/06/21 02:36:37 checking revisions... [ 33.805445] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:36:37 testing simple program... [ 33.858853] cgroup: Unknown subsys name 'net' [ 33.896689] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:37 Registers: info registers vcpu 0 RAX=ffffffff8180ce89 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888009077601 RSI=ffff888009077620 RDI=ffff888009077620 RBP=ffff88806ce09ac8 RSP=ffff88806ce099f8 R8 =ffffffff86138eb4 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff888009077628 R15=ffff88806ce09a70 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f7fa324b900 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=00007fae373f2650 CR3=000000000d638000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=96346ca7220fcd6b00000000000ae988 XMM05=f49abcc64b6bd3670000000000132578 XMM06=c291bd5c70af25b90000000000131368 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0aa69 RBX=ffffffff8605534c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffffffff8605534c RSP=ffff888009b473d8 R8 =ffffffff864bbb4e R9 =ffff888009b474d0 R10=0000000000038001 R11=00000000000b6a61 R12=ffffffff8605534c R13=ffffffff86055348 R14=ffffffff86055348 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fae36e3d900 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=00007fae373f4618 CR3=0000000016d70000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000