syzkaller login: [ 30.641445] BUG: Bad rss-counter state mm:00000000efc753cb type:MM_FILEPAGES val:33 [ 30.642245] BUG: Bad rss-counter state mm:00000000efc753cb type:MM_ANONPAGES val:22 [ 30.784282] ================================================================== [ 30.785408] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.786743] Read of size 8 at addr ffff888019cc55c8 by task sshd/220 [ 30.787436] [ 30.787613] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.788326] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.789131] Call Trace: [ 30.789403] [ 30.789636] dump_stack_lvl+0x91/0xf0 [ 30.790038] print_report+0xcc/0x620 [ 30.790455] ? __virt_addr_valid+0x102/0x340 [ 30.790900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791399] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791903] kasan_report+0xbe/0xf0 [ 30.792289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792785] vma_interval_tree_remove+0xc75/0xec0 [ 30.793270] vma_prepare+0xc54/0x11a0 [ 30.793659] __split_vma+0x5af/0x950 [ 30.794060] ? __pfx___split_vma+0x10/0x10 [ 30.794540] ? find_held_lock+0x2c/0x110 [ 30.794968] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.795431] ? lock_is_held_type+0x9f/0x120 [ 30.795873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.796363] ? mtree_range_walk+0x632/0x900 [ 30.796820] ? mas_walk+0x5c7/0x7c0 [ 30.797218] do_vmi_munmap+0x1f1/0x2b0 [ 30.797636] mmap_region+0x1f9/0x2660 [ 30.798031] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.798457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.799062] ? __pfx_lock_acquire+0x10/0x10 [ 30.799503] ? __pfx_mmap_region+0x10/0x10 [ 30.799952] ? security_mmap_addr+0x7d/0xa0 [ 30.800400] ? get_unmapped_area+0x1f5/0x3f0 [ 30.800851] do_mmap+0x854/0xf00 [ 30.801219] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.801633] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.802091] ksys_mmap_pgoff+0x3af/0x500 [ 30.802514] do_syscall_64+0x3f/0x90 [ 30.802911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803442] RIP: 0033:0x7fa5b7b6cd82 [ 30.803823] 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 [ 30.805564] RSP: 002b:00007fffa24f3be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.806307] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5b7b6cd82 [ 30.807013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5b6fa6000 [ 30.807713] RBP: 00007fa5b6fa6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.808419] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653bcb84980 [ 30.809112] R13: 00007fffa24f3c00 R14: 00007fffa24f3c30 R15: 00007fffa24f3f90 [ 30.809808] [ 30.810062] [ 30.810237] Allocated by task 213: [ 30.810602] kasan_save_stack+0x22/0x50 [ 30.811008] kasan_set_track+0x25/0x30 [ 30.811411] __kasan_slab_alloc+0x59/0x70 [ 30.811832] kmem_cache_alloc+0x16b/0x370 [ 30.812266] vm_area_dup+0x20/0x160 [ 30.812643] __split_vma+0x170/0x950 [ 30.813022] split_vma+0xc6/0x110 [ 30.813383] mprotect_fixup+0x8d2/0xb30 [ 30.813791] do_mprotect_pkey+0x87e/0xd40 [ 30.814226] __x64_sys_mprotect+0x78/0xc0 [ 30.814677] do_syscall_64+0x3f/0x90 [ 30.815054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815592] [ 30.815770] Freed by task 213: [ 30.816103] kasan_save_stack+0x22/0x50 [ 30.816522] kasan_set_track+0x25/0x30 [ 30.816917] kasan_save_free_info+0x2b/0x50 [ 30.817342] __kasan_slab_free+0x10a/0x190 [ 30.817776] kmem_cache_free+0x10d/0x4d0 [ 30.818210] rcu_core+0x8c8/0x2860 [ 30.818597] __do_softirq+0x1b7/0x7d4 [ 30.818992] [ 30.819172] Last potentially related work creation: [ 30.819642] kasan_save_stack+0x22/0x50 [ 30.820054] __kasan_record_aux_stack+0x8e/0xa0 [ 30.820524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.821053] remove_vma+0x139/0x170 [ 30.821417] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821862] do_vmi_munmap+0x1f1/0x2b0 [ 30.822264] __vm_munmap+0x138/0x3a0 [ 30.822667] __x64_sys_munmap+0x59/0x80 [ 30.823086] do_syscall_64+0x3f/0x90 [ 30.823469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823996] [ 30.824177] The buggy address belongs to the object at ffff888019cc5570 [ 30.824177] which belongs to the cache vm_area_struct of size 168 [ 30.825392] The buggy address is located 88 bytes inside of [ 30.825392] freed 168-byte region [ffff888019cc5570, ffff888019cc5618) [ 30.826571] [ 30.826753] The buggy address belongs to the physical page: [ 30.827300] page:00000000e9fe8919 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cc5 [ 30.828203] memcg:ffff888009a8a201 [ 30.828554] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.829089] page_type: 0xffffffff() [ 30.829464] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.830194] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a8a201 [ 30.830949] page dumped because: kasan: bad access detected [ 30.831488] [ 30.831674] Memory state around the buggy address: [ 30.832160] ffff888019cc5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.832846] ffff888019cc5500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.833561] >ffff888019cc5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.834272] ^ [ 30.834860] ffff888019cc5600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.835581] ffff888019cc5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.836285] ================================================================== [ 30.837098] Disabling lock debugging due to kernel taint [ 33.412092] BUG: Bad rss-counter state mm:0000000060474fcb type:MM_FILEPAGES val:33 [ 33.413620] BUG: Bad rss-counter state mm:0000000060474fcb type:MM_ANONPAGES val:22 [ 33.990058] BUG: Bad rss-counter state mm:00000000a3b6fec9 type:MM_FILEPAGES val:33 [ 33.991280] BUG: Bad rss-counter state mm:00000000a3b6fec9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59518' (ECDSA) to the list of known hosts. 2023/06/19 14:33:33 fuzzer started 2023/06/19 14:33:33 dialing manager at localhost:44161 2023/06/19 14:33:33 checking machine... 2023/06/19 14:33:33 checking revisions... [ 34.633795] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:33:33 testing simple program... [ 34.683142] cgroup: Unknown subsys name 'net' [ 34.720594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:31 Registers: info registers vcpu 0 RAX=ffffea000031a888 RBX=000000000000018e RCX=ffffffff8178b801 RDX=ffffea000031a888 RSI=0000000000000008 RDI=ffffea000031a8a0 RBP=0000000000000000 RSP=ffff88801643f498 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000000000001a17d R12=0000000000000001 R13=dffffc0000000000 R14=ffffea000031a880 R15=ffff88806ce40140 RIP=ffffffff8178b719 RFL=00000046 [---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 00007effd991e700 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=00007ffd690adfa8 CR3=000000000e296000 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=00007f23999fb5100000562f63d4e790 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=ffff888009b90000 RCX=0000000000000000 RDX=ffff888018dc3680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880145f7500 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000001 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c02c4 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 00007f5ec790a900 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=00007fff0ed58000 CR3=000000000c966000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000