syzkaller login: [ 39.387243] BUG: Bad rss-counter state mm:00000000cfb32bb3 type:MM_FILEPAGES val:33 [ 39.388663] BUG: Bad rss-counter state mm:00000000cfb32bb3 type:MM_ANONPAGES val:22 [ 39.538227] ================================================================== [ 39.539130] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.540051] Read of size 8 at addr ffff888016f61228 by task sshd/219 [ 39.540916] [ 39.541136] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.542018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.543019] Call Trace: [ 39.543339] [ 39.543626] dump_stack_lvl+0x91/0xf0 [ 39.544110] print_report+0xcc/0x620 [ 39.544590] ? __virt_addr_valid+0x102/0x340 [ 39.545141] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.545760] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.546395] kasan_report+0xbe/0xf0 [ 39.546872] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.547488] vma_interval_tree_remove+0xc75/0xec0 [ 39.548093] vma_prepare+0xc54/0x11a0 [ 39.548576] __split_vma+0x5af/0x950 [ 39.549044] ? __pfx___split_vma+0x10/0x10 [ 39.549570] ? find_held_lock+0x2c/0x110 [ 39.550107] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.550673] ? lock_is_held_type+0x9f/0x120 [ 39.551210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.551814] ? mtree_range_walk+0x632/0x900 [ 39.552363] ? mas_walk+0x5c7/0x7c0 [ 39.552838] do_vmi_munmap+0x1f1/0x2b0 [ 39.553328] mmap_region+0x1f9/0x2660 [ 39.553808] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.554344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.555067] ? __pfx_lock_acquire+0x10/0x10 [ 39.555628] ? __pfx_mmap_region+0x10/0x10 [ 39.556188] ? security_mmap_addr+0x7d/0xa0 [ 39.556713] ? get_unmapped_area+0x1f5/0x3f0 [ 39.557278] do_mmap+0x854/0xf00 [ 39.557718] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.558245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.558819] ksys_mmap_pgoff+0x3af/0x500 [ 39.559334] do_syscall_64+0x3f/0x90 [ 39.559818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.560472] RIP: 0033:0x7fde96a06d82 [ 39.560928] 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 [ 39.563084] RSP: 002b:00007ffcb325f6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.564000] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde96a06d82 [ 39.564847] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde95e40000 [ 39.565691] RBP: 00007fde95e40000 R08: 0000000000000009 R09: 0000000000001000 [ 39.566554] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6755a1f70 [ 39.567418] R13: 00007ffcb325f700 R14: 00007ffcb325f730 R15: 00007ffcb325fa90 [ 39.568285] [ 39.568581] [ 39.568803] Allocated by task 212: [ 39.569246] kasan_save_stack+0x22/0x50 [ 39.569756] kasan_set_track+0x25/0x30 [ 39.570260] __kasan_slab_alloc+0x59/0x70 [ 39.570793] kmem_cache_alloc+0x16b/0x370 [ 39.571319] vm_area_dup+0x20/0x160 [ 39.571778] __split_vma+0x170/0x950 [ 39.572253] split_vma+0xc6/0x110 [ 39.572696] mprotect_fixup+0x8d2/0xb30 [ 39.573200] do_mprotect_pkey+0x87e/0xd40 [ 39.573733] __x64_sys_mprotect+0x78/0xc0 [ 39.574261] do_syscall_64+0x3f/0x90 [ 39.574741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.575379] [ 39.575592] Freed by task 212: [ 39.575985] kasan_save_stack+0x22/0x50 [ 39.576494] kasan_set_track+0x25/0x30 [ 39.576987] kasan_save_free_info+0x2b/0x50 [ 39.577525] __kasan_slab_free+0x10a/0x190 [ 39.578082] kmem_cache_free+0x10d/0x4d0 [ 39.578594] rcu_core+0x8c8/0x2860 [ 39.579045] __do_softirq+0x1b7/0x7d4 [ 39.579526] [ 39.579747] Last potentially related work creation: [ 39.580339] kasan_save_stack+0x22/0x50 [ 39.580851] __kasan_record_aux_stack+0x8e/0xa0 [ 39.581428] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.582080] remove_vma+0x139/0x170 [ 39.582535] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.583092] do_vmi_munmap+0x1f1/0x2b0 [ 39.583576] __vm_munmap+0x138/0x3a0 [ 39.584045] __x64_sys_munmap+0x59/0x80 [ 39.584548] do_syscall_64+0x3f/0x90 [ 39.585022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.585662] [ 39.585881] The buggy address belongs to the object at ffff888016f611d0 [ 39.585881] which belongs to the cache vm_area_struct of size 168 [ 39.587374] The buggy address is located 88 bytes inside of [ 39.587374] freed 168-byte region [ffff888016f611d0, ffff888016f61278) [ 39.588772] [ 39.588990] The buggy address belongs to the physical page: [ 39.589641] page:00000000a248a657 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f61 [ 39.590743] memcg:ffff888019b1ce01 [ 39.591167] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.591812] page_type: 0xffffffff() [ 39.592267] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.593175] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b1ce01 [ 39.594095] page dumped because: kasan: bad access detected [ 39.594762] [ 39.594979] Memory state around the buggy address: [ 39.595567] ffff888016f61100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.596429] ffff888016f61180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.597286] >ffff888016f61200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.598160] ^ [ 39.598724] ffff888016f61280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.599582] ffff888016f61300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.600445] ================================================================== [ 39.601420] Disabling lock debugging due to kernel taint [ 42.009442] BUG: Bad rss-counter state mm:00000000d17fc288 type:MM_FILEPAGES val:33 [ 42.010448] BUG: Bad rss-counter state mm:00000000d17fc288 type:MM_ANONPAGES val:22 [ 42.578049] BUG: Bad rss-counter state mm:0000000002a28538 type:MM_FILEPAGES val:33 [ 42.579200] BUG: Bad rss-counter state mm:0000000002a28538 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47294' (ECDSA) to the list of known hosts. 2023/06/19 19:50:17 fuzzer started 2023/06/19 19:50:18 dialing manager at localhost:44161 2023/06/19 19:50:18 checking machine... 2023/06/19 19:50:18 checking revisions... [ 43.211190] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:50:18 testing simple program... [ 43.247382] cgroup: Unknown subsys name 'net' [ 43.287010] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:50:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000053 RCX=0000000000000000 RDX=ffff888014771b40 RSI=ffffffff8184d3e1 RDI=0000000000000007 RBP=ffff8880096a5853 RSP=ffff8880147378d0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff8880096a5800 R13=0000000000000000 R14=ffffea000025a940 R15=ffffea000025a940 RIP=ffffffff8184d3e1 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 00007f9461e99900 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=00007f48a216f650 CR3=000000000d87c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b31d02020845fbd600000000000ae988 XMM05=023217a552a7ce930000000000135a50 XMM06=c291bd5c70af25b90000000000134840 XMM07=fb795ef6d65770560000000000124710 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000000000c RCX=ffffffff8363612b RDX=ffff88800ba31b40 RSI=0000000000000000 RDI=0000000000000005 RBP=00007ffeab689b28 RSP=ffff8880183dfb10 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000000c R11=000009cf000009cf R12=0000000000000000 R13=000000000000000c R14=ffff8880183dfbb8 R15=00007ffeab689b04 RIP=ffffffff814c07eb RFL=00000206 [-----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 00007f48a1bba900 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=00007f48a2171618 CR3=000000000c576000 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