syzkaller login: [ 32.119150] BUG: Bad rss-counter state mm:00000000ea8feeab type:MM_FILEPAGES val:33 [ 32.120568] BUG: Bad rss-counter state mm:00000000ea8feeab type:MM_ANONPAGES val:22 [ 32.268671] ================================================================== [ 32.269758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.271035] Read of size 8 at addr ffff888017021d08 by task sshd/220 [ 32.271977] [ 32.272241] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.273288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.274467] Call Trace: [ 32.274790] [ 32.275078] dump_stack_lvl+0x91/0xf0 [ 32.275575] print_report+0xcc/0x620 [ 32.276075] ? __virt_addr_valid+0x102/0x340 [ 32.276642] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.277267] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.277904] kasan_report+0xbe/0xf0 [ 32.278396] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.279022] vma_interval_tree_remove+0xc75/0xec0 [ 32.279626] vma_prepare+0xc54/0x11a0 [ 32.280109] __split_vma+0x5af/0x950 [ 32.280582] ? __pfx___split_vma+0x10/0x10 [ 32.281118] ? find_held_lock+0x2c/0x110 [ 32.281642] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.282218] ? lock_is_held_type+0x9f/0x120 [ 32.282757] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.283364] ? mtree_range_walk+0x632/0x900 [ 32.283911] ? mas_walk+0x5c7/0x7c0 [ 32.284384] do_vmi_munmap+0x1f1/0x2b0 [ 32.284885] mmap_region+0x1f9/0x2660 [ 32.285371] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.285907] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.286619] ? __pfx_lock_acquire+0x10/0x10 [ 32.287152] ? __pfx_mmap_region+0x10/0x10 [ 32.287680] ? security_mmap_addr+0x7d/0xa0 [ 32.288211] ? get_unmapped_area+0x1f5/0x3f0 [ 32.288766] do_mmap+0x854/0xf00 [ 32.289202] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.289703] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.290279] ksys_mmap_pgoff+0x3af/0x500 [ 32.290797] do_syscall_64+0x3f/0x90 [ 32.291271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.291927] RIP: 0033:0x7f1838e1bd82 [ 32.292386] 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 [ 32.294554] RSP: 002b:00007ffe9feb85a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.295481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1838e1bd82 [ 32.296340] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1838255000 [ 32.297196] RBP: 00007f1838255000 R08: 0000000000000009 R09: 0000000000001000 [ 32.298072] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640107fdd90 [ 32.298923] R13: 00007ffe9feb85c0 R14: 00007ffe9feb85f0 R15: 00007ffe9feb8950 [ 32.299793] [ 32.300089] [ 32.300305] Allocated by task 213: [ 32.300746] kasan_save_stack+0x22/0x50 [ 32.301254] kasan_set_track+0x25/0x30 [ 32.301757] __kasan_slab_alloc+0x59/0x70 [ 32.302295] kmem_cache_alloc+0x16b/0x370 [ 32.302810] vm_area_dup+0x20/0x160 [ 32.303266] __split_vma+0x170/0x950 [ 32.303741] split_vma+0xc6/0x110 [ 32.304187] mprotect_fixup+0x8d2/0xb30 [ 32.304690] do_mprotect_pkey+0x87e/0xd40 [ 32.305219] __x64_sys_mprotect+0x78/0xc0 [ 32.305745] do_syscall_64+0x3f/0x90 [ 32.306226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.306870] [ 32.307085] Freed by task 213: [ 32.307485] kasan_save_stack+0x22/0x50 [ 32.307987] kasan_set_track+0x25/0x30 [ 32.308484] kasan_save_free_info+0x2b/0x50 [ 32.309032] __kasan_slab_free+0x10a/0x190 [ 32.309581] kmem_cache_free+0x10d/0x4d0 [ 32.310095] rcu_core+0x8c8/0x2860 [ 32.310535] __do_softirq+0x1b7/0x7d4 [ 32.311023] [ 32.311240] Last potentially related work creation: [ 32.311834] kasan_save_stack+0x22/0x50 [ 32.312346] __kasan_record_aux_stack+0x8e/0xa0 [ 32.312918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.313574] remove_vma+0x139/0x170 [ 32.314042] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.314602] do_vmi_munmap+0x1f1/0x2b0 [ 32.315086] __vm_munmap+0x138/0x3a0 [ 32.315555] __x64_sys_munmap+0x59/0x80 [ 32.316055] do_syscall_64+0x3f/0x90 [ 32.316535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.317187] [ 32.317402] The buggy address belongs to the object at ffff888017021cb0 [ 32.317402] which belongs to the cache vm_area_struct of size 168 [ 32.318906] The buggy address is located 88 bytes inside of [ 32.318906] freed 168-byte region [ffff888017021cb0, ffff888017021d58) [ 32.320338] [ 32.320556] The buggy address belongs to the physical page: [ 32.321220] page:0000000042d72cd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17021 [ 32.322346] memcg:ffff88800d282201 [ 32.322776] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.323431] page_type: 0xffffffff() [ 32.323886] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.324812] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d282201 [ 32.325746] page dumped because: kasan: bad access detected [ 32.326440] [ 32.326665] Memory state around the buggy address: [ 32.327271] ffff888017021c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.328149] ffff888017021c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.328999] >ffff888017021d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.329845] ^ [ 32.330297] ffff888017021d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.331151] ffff888017021e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.332019] ================================================================== [ 32.333217] Disabling lock debugging due to kernel taint [ 34.495854] BUG: Bad rss-counter state mm:00000000d802250f type:MM_FILEPAGES val:33 [ 34.497065] BUG: Bad rss-counter state mm:00000000d802250f type:MM_ANONPAGES val:22 [ 34.996300] BUG: Bad rss-counter state mm:00000000fade6dec type:MM_FILEPAGES val:33 [ 34.997306] BUG: Bad rss-counter state mm:00000000fade6dec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50614' (ECDSA) to the list of known hosts. 2023/06/20 04:02:51 fuzzer started 2023/06/20 04:02:51 dialing manager at localhost:44161 2023/06/20 04:02:51 checking machine... 2023/06/20 04:02:51 checking revisions... [ 35.701203] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:02:51 testing simple program... [ 35.743151] cgroup: Unknown subsys name 'net' [ 35.798541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:02:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe285146e8 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=00007f2c6837b5100000562b2e028790 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=0000000000023842 RBX=0000000000000001 RCX=ffffffff818a83a7 RDX=0000000000023843 RSI=0000000000008a83 RDI=ffffffff8614755e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86147558 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000023842 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130861 RFL=00000283 [--S---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 00007fb3b0f9f900 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=00007f097679d650 CR3=0000000009b4c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6a01de4874ca05c800000000000ae988 XMM05=8d9c67b0c06e048600000000001354b0 XMM06=4fda316b135da52b00000000001342a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000