syzkaller login: [ 30.373598] BUG: Bad rss-counter state mm:00000000cc17d783 type:MM_FILEPAGES val:33 [ 30.374637] BUG: Bad rss-counter state mm:00000000cc17d783 type:MM_ANONPAGES val:22 [ 30.544480] ================================================================== [ 30.545390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.546323] Read of size 8 at addr ffff88800e520b38 by task sshd/220 [ 30.547088] [ 30.547306] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.548209] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.549194] Call Trace: [ 30.549598] [ 30.549953] dump_stack_lvl+0x91/0xf0 [ 30.550549] print_report+0xcc/0x620 [ 30.551121] ? __virt_addr_valid+0x102/0x340 [ 30.551767] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.552496] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.553227] kasan_report+0xbe/0xf0 [ 30.553790] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.554555] vma_interval_tree_remove+0xc75/0xec0 [ 30.555289] vma_prepare+0xc54/0x11a0 [ 30.555868] __split_vma+0x5af/0x950 [ 30.556442] ? __pfx___split_vma+0x10/0x10 [ 30.557089] ? find_held_lock+0x2c/0x110 [ 30.557715] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.558430] ? lock_is_held_type+0x9f/0x120 [ 30.559061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.559657] ? mtree_range_walk+0x632/0x900 [ 30.560200] ? mas_walk+0x5c7/0x7c0 [ 30.560675] do_vmi_munmap+0x1f1/0x2b0 [ 30.561162] mmap_region+0x1f9/0x2660 [ 30.561632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.562150] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.562845] ? __pfx_lock_acquire+0x10/0x10 [ 30.563370] ? __pfx_mmap_region+0x10/0x10 [ 30.563897] ? security_mmap_addr+0x7d/0xa0 [ 30.564421] ? get_unmapped_area+0x1f5/0x3f0 [ 30.564957] do_mmap+0x854/0xf00 [ 30.565388] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.565877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.566438] ksys_mmap_pgoff+0x3af/0x500 [ 30.566942] do_syscall_64+0x3f/0x90 [ 30.567420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.568054] RIP: 0033:0x7fee082b1d82 [ 30.568501] 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 [ 30.570598] RSP: 002b:00007ffe273fad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.571485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee082b1d82 [ 30.572326] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee076eb000 [ 30.573157] RBP: 00007fee076eb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.573994] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6aaaa4ec0 [ 30.574842] R13: 00007ffe273fad30 R14: 00007ffe273fad60 R15: 00007ffe273fb0c0 [ 30.575700] [ 30.575990] [ 30.576201] Allocated by task 213: [ 30.576625] kasan_save_stack+0x22/0x50 [ 30.577121] kasan_set_track+0x25/0x30 [ 30.577602] __kasan_slab_alloc+0x59/0x70 [ 30.578136] kmem_cache_alloc+0x16b/0x370 [ 30.578649] vm_area_dup+0x20/0x160 [ 30.579098] __split_vma+0x170/0x950 [ 30.579558] split_vma+0xc6/0x110 [ 30.579992] mprotect_fixup+0x8d2/0xb30 [ 30.580497] do_mprotect_pkey+0x87e/0xd40 [ 30.581016] __x64_sys_mprotect+0x78/0xc0 [ 30.581527] do_syscall_64+0x3f/0x90 [ 30.582007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.582660] [ 30.582880] Freed by task 203: [ 30.583272] kasan_save_stack+0x22/0x50 [ 30.583766] kasan_set_track+0x25/0x30 [ 30.584263] kasan_save_free_info+0x2b/0x50 [ 30.584788] __kasan_slab_free+0x10a/0x190 [ 30.585318] kmem_cache_free+0x10d/0x4d0 [ 30.585817] rcu_core+0x8c8/0x2860 [ 30.586277] __do_softirq+0x1b7/0x7d4 [ 30.586746] [ 30.586959] Last potentially related work creation: [ 30.587539] kasan_save_stack+0x22/0x50 [ 30.588042] __kasan_record_aux_stack+0x8e/0xa0 [ 30.588609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.589240] remove_vma+0x139/0x170 [ 30.589685] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.590255] do_vmi_munmap+0x1f1/0x2b0 [ 30.590730] __vm_munmap+0x138/0x3a0 [ 30.591204] __x64_sys_munmap+0x59/0x80 [ 30.591693] do_syscall_64+0x3f/0x90 [ 30.592165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.592802] [ 30.593014] The buggy address belongs to the object at ffff88800e520ae0 [ 30.593014] which belongs to the cache vm_area_struct of size 168 [ 30.594469] The buggy address is located 88 bytes inside of [ 30.594469] freed 168-byte region [ffff88800e520ae0, ffff88800e520b88) [ 30.595851] [ 30.596065] The buggy address belongs to the physical page: [ 30.596712] page:000000006144722a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe520 [ 30.597775] memcg:ffff88800e524e01 [ 30.598225] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.598864] page_type: 0xffffffff() [ 30.599306] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.600218] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e524e01 [ 30.601121] page dumped because: kasan: bad access detected [ 30.601770] [ 30.601985] Memory state around the buggy address: [ 30.602577] ffff88800e520a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.603411] ffff88800e520a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.604258] >ffff88800e520b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.605116] ^ [ 30.605717] ffff88800e520b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.606582] ffff88800e520c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.607427] ================================================================== [ 30.608402] Disabling lock debugging due to kernel taint [ 32.852040] BUG: Bad rss-counter state mm:00000000126eb87b type:MM_FILEPAGES val:33 [ 32.853104] BUG: Bad rss-counter state mm:00000000126eb87b type:MM_ANONPAGES val:22 [ 33.441616] BUG: Bad rss-counter state mm:0000000073e1c29e type:MM_FILEPAGES val:33 [ 33.442795] BUG: Bad rss-counter state mm:0000000073e1c29e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22673' (ECDSA) to the list of known hosts. 2023/06/20 19:19:02 fuzzer started 2023/06/20 19:19:03 dialing manager at localhost:36067 2023/06/20 19:19:03 checking machine... 2023/06/20 19:19:03 checking revisions... [ 34.101469] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:19:03 testing simple program... [ 34.156403] cgroup: Unknown subsys name 'net' [ 34.205717] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:19:02 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=00007fff98797758 CR3=0000000005482000 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=00007f86646ac5100000564fbe3e0790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000dc0 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000132 RDI=ffffffff85265479 RBP=ffff88800f727ca8 RSP=ffff88800f727c58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b23c0 R13=ffff88800c631180 R14=0000000000000000 R15=ffffffff81ef1138 RIP=ffffffff8122e9e0 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 00007f3fe038e900 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=00007f3fe09460b0 CR3=000000000c732000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000