syzkaller login: [ 60.618047] BUG: Bad rss-counter state mm:0000000034ddfb2d type:MM_FILEPAGES val:33 [ 60.619379] BUG: Bad rss-counter state mm:0000000034ddfb2d type:MM_ANONPAGES val:22 [ 60.772621] ================================================================== [ 60.773552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.774495] Read of size 8 at addr ffff88800eada6b0 by task sshd/219 [ 60.775388] [ 60.775615] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.776495] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.777493] Call Trace: [ 60.777809] [ 60.778117] dump_stack_lvl+0x91/0xf0 [ 60.778619] print_report+0xcc/0x620 [ 60.779129] ? __virt_addr_valid+0x102/0x340 [ 60.779694] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.780320] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.780947] kasan_report+0xbe/0xf0 [ 60.781425] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.782060] vma_interval_tree_remove+0xc75/0xec0 [ 60.782688] vma_prepare+0xc54/0x11a0 [ 60.783196] __split_vma+0x5af/0x950 [ 60.783693] ? __pfx___split_vma+0x10/0x10 [ 60.784244] ? find_held_lock+0x2c/0x110 [ 60.784781] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.785371] ? lock_is_held_type+0x9f/0x120 [ 60.785927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.786566] ? mtree_range_walk+0x632/0x900 [ 60.787155] ? mas_walk+0x5c7/0x7c0 [ 60.787649] do_vmi_munmap+0x1f1/0x2b0 [ 60.788157] mmap_region+0x1f9/0x2660 [ 60.788661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.789199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.789942] ? __pfx_lock_acquire+0x10/0x10 [ 60.790500] ? __pfx_mmap_region+0x10/0x10 [ 60.791057] ? security_mmap_addr+0x7d/0xa0 [ 60.791639] ? get_unmapped_area+0x1f5/0x3f0 [ 60.792218] do_mmap+0x854/0xf00 [ 60.792673] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.793190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.793777] ksys_mmap_pgoff+0x3af/0x500 [ 60.794302] do_syscall_64+0x3f/0x90 [ 60.794804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.795494] RIP: 0033:0x7f1dac8a6d82 [ 60.795971] 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 [ 60.798218] RSP: 002b:00007ffdc4a29488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.799171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1dac8a6d82 [ 60.800065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1dabce0000 [ 60.800950] RBP: 00007f1dabce0000 R08: 0000000000000009 R09: 0000000000001000 [ 60.801834] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556245b4eec0 [ 60.802711] R13: 00007ffdc4a294a0 R14: 00007ffdc4a294d0 R15: 00007ffdc4a29830 [ 60.803637] [ 60.803944] [ 60.804173] Allocated by task 212: [ 60.804619] kasan_save_stack+0x22/0x50 [ 60.805145] kasan_set_track+0x25/0x30 [ 60.805658] __kasan_slab_alloc+0x59/0x70 [ 60.806204] kmem_cache_alloc+0x16b/0x370 [ 60.806741] vm_area_dup+0x20/0x160 [ 60.807231] __split_vma+0x170/0x950 [ 60.807713] split_vma+0xc6/0x110 [ 60.808169] mprotect_fixup+0x8d2/0xb30 [ 60.808688] do_mprotect_pkey+0x87e/0xd40 [ 60.809230] __x64_sys_mprotect+0x78/0xc0 [ 60.809773] do_syscall_64+0x3f/0x90 [ 60.810263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.810934] [ 60.811170] Freed by task 212: [ 60.811584] kasan_save_stack+0x22/0x50 [ 60.812108] kasan_set_track+0x25/0x30 [ 60.812618] kasan_save_free_info+0x2b/0x50 [ 60.813178] __kasan_slab_free+0x10a/0x190 [ 60.813734] kmem_cache_free+0x10d/0x4d0 [ 60.814267] rcu_core+0x8c8/0x2860 [ 60.814735] __do_softirq+0x1b7/0x7d4 [ 60.815256] [ 60.815482] Last potentially related work creation: [ 60.816108] kasan_save_stack+0x22/0x50 [ 60.816648] __kasan_record_aux_stack+0x8e/0xa0 [ 60.817242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.817915] remove_vma+0x139/0x170 [ 60.818384] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.818969] do_vmi_munmap+0x1f1/0x2b0 [ 60.819490] __vm_munmap+0x138/0x3a0 [ 60.819980] __x64_sys_munmap+0x59/0x80 [ 60.820501] do_syscall_64+0x3f/0x90 [ 60.821002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.821662] [ 60.821884] The buggy address belongs to the object at ffff88800eada658 [ 60.821884] which belongs to the cache vm_area_struct of size 168 [ 60.823436] The buggy address is located 88 bytes inside of [ 60.823436] freed 168-byte region [ffff88800eada658, ffff88800eada700) [ 60.824916] [ 60.825143] The buggy address belongs to the physical page: [ 60.825829] page:0000000069dd775d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeada [ 60.826970] memcg:ffff88800e0d4801 [ 60.827436] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.828166] page_type: 0xffffffff() [ 60.828640] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c2580 dead000000000005 [ 60.829599] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d4801 [ 60.830554] page dumped because: kasan: bad access detected [ 60.831258] [ 60.831481] Memory state around the buggy address: [ 60.832095] ffff88800eada580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.832996] ffff88800eada600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.833881] >ffff88800eada680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.834781] ^ [ 60.835401] ffff88800eada700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.836290] ffff88800eada780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.837188] ================================================================== [ 60.838226] Disabling lock debugging due to kernel taint [ 63.088838] BUG: Bad rss-counter state mm:0000000083522c80 type:MM_FILEPAGES val:33 [ 63.090035] BUG: Bad rss-counter state mm:0000000083522c80 type:MM_ANONPAGES val:22 [ 63.520056] BUG: Bad rss-counter state mm:00000000ff2407c6 type:MM_FILEPAGES val:33 [ 63.521226] BUG: Bad rss-counter state mm:00000000ff2407c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38102' (ECDSA) to the list of known hosts. 2023/06/20 13:33:50 fuzzer started 2023/06/20 13:33:50 dialing manager at localhost:36067 2023/06/20 13:33:50 checking machine... 2023/06/20 13:33:50 checking revisions... [ 64.235009] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:33:50 testing simple program... [ 64.285093] cgroup: Unknown subsys name 'net' [ 64.329904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:50 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=0000000000000001 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=00007ffd812dcd58 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=00007ffb6a53a510000055e328efd790 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=dffffc0000000000 RBX=ffff88806cf09a70 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffff88806cf09f50 RDI=ffffffff84537da7 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a58 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888016e83680 R15=ffff88800c83b508 RIP=ffffffff811303b2 RFL=00000246 [---Z-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 00007f823e11f900 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=00007f823e6d70b0 CR3=000000000e786000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000