syzkaller login: [ 31.441584] BUG: Bad rss-counter state mm:0000000039c70a74 type:MM_FILEPAGES val:33 [ 31.442899] BUG: Bad rss-counter state mm:0000000039c70a74 type:MM_ANONPAGES val:22 [ 31.486090] ================================================================== [ 31.487075] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.488123] Read of size 8 at addr ffff888009c6dd08 by task sshd/220 [ 31.488893] [ 31.489112] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.489964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.490932] Call Trace: [ 31.491270] [ 31.491583] dump_stack_lvl+0x91/0xf0 [ 31.492159] print_report+0xcc/0x620 [ 31.492729] ? __virt_addr_valid+0x102/0x340 [ 31.493385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.494135] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.494868] kasan_report+0xbe/0xf0 [ 31.495445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.496194] vma_interval_tree_remove+0xc75/0xec0 [ 31.496935] vma_prepare+0xc54/0x11a0 [ 31.497519] __split_vma+0x5af/0x950 [ 31.498095] ? __pfx___split_vma+0x10/0x10 [ 31.498736] ? find_held_lock+0x2c/0x110 [ 31.499419] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.499987] ? lock_is_held_type+0x9f/0x120 [ 31.500529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.501135] ? mtree_range_walk+0x632/0x900 [ 31.501688] ? mas_walk+0x5c7/0x7c0 [ 31.502178] do_vmi_munmap+0x1f1/0x2b0 [ 31.502671] mmap_region+0x1f9/0x2660 [ 31.503154] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.503691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.504413] ? __pfx_lock_acquire+0x10/0x10 [ 31.504945] ? __pfx_mmap_region+0x10/0x10 [ 31.505484] ? security_mmap_addr+0x7d/0xa0 [ 31.506013] ? get_unmapped_area+0x1f5/0x3f0 [ 31.506564] do_mmap+0x854/0xf00 [ 31.507006] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.507554] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.508235] ksys_mmap_pgoff+0x3af/0x500 [ 31.508862] do_syscall_64+0x3f/0x90 [ 31.509444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.510234] RIP: 0033:0x7f4d4c798d82 [ 31.510789] 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 [ 31.513074] RSP: 002b:00007ffe0dcbc878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.513976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d4c798d82 [ 31.514823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d4bbd2000 [ 31.515703] RBP: 00007f4d4bbd2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.516558] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8adec6ec0 [ 31.517393] R13: 00007ffe0dcbc890 R14: 00007ffe0dcbc8c0 R15: 00007ffe0dcbcc20 [ 31.518249] [ 31.518550] [ 31.518767] Allocated by task 213: [ 31.519200] kasan_save_stack+0x22/0x50 [ 31.519713] kasan_set_track+0x25/0x30 [ 31.520202] __kasan_slab_alloc+0x59/0x70 [ 31.520734] kmem_cache_alloc+0x16b/0x370 [ 31.521243] vm_area_dup+0x20/0x160 [ 31.521698] __split_vma+0x170/0x950 [ 31.522167] split_vma+0xc6/0x110 [ 31.522604] mprotect_fixup+0x8d2/0xb30 [ 31.523108] do_mprotect_pkey+0x87e/0xd40 [ 31.523662] __x64_sys_mprotect+0x78/0xc0 [ 31.524189] do_syscall_64+0x3f/0x90 [ 31.524660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.525302] [ 31.525514] Freed by task 213: [ 31.525907] kasan_save_stack+0x22/0x50 [ 31.526408] kasan_set_track+0x25/0x30 [ 31.526900] kasan_save_free_info+0x2b/0x50 [ 31.527499] __kasan_slab_free+0x10a/0x190 [ 31.528034] kmem_cache_free+0x10d/0x4d0 [ 31.528546] rcu_core+0x8c8/0x2860 [ 31.528988] __do_softirq+0x1b7/0x7d4 [ 31.529460] [ 31.529674] Last potentially related work creation: [ 31.530260] kasan_save_stack+0x22/0x50 [ 31.530761] __kasan_record_aux_stack+0x8e/0xa0 [ 31.531372] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.532011] remove_vma+0x139/0x170 [ 31.532465] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.533021] do_vmi_munmap+0x1f1/0x2b0 [ 31.533500] __vm_munmap+0x138/0x3a0 [ 31.533967] __x64_sys_munmap+0x59/0x80 [ 31.534459] do_syscall_64+0x3f/0x90 [ 31.534928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.535599] [ 31.535813] The buggy address belongs to the object at ffff888009c6dcb0 [ 31.535813] which belongs to the cache vm_area_struct of size 168 [ 31.537266] The buggy address is located 88 bytes inside of [ 31.537266] freed 168-byte region [ffff888009c6dcb0, ffff888009c6dd58) [ 31.538672] [ 31.538885] The buggy address belongs to the physical page: [ 31.539562] page:0000000084fbcb04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9c6d [ 31.540640] memcg:ffff88800eebd701 [ 31.541062] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.541705] page_type: 0xffffffff() [ 31.542152] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.543065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eebd701 [ 31.544001] page dumped because: kasan: bad access detected [ 31.544664] [ 31.544882] Memory state around the buggy address: [ 31.545457] ffff888009c6dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.546312] ffff888009c6dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.547167] >ffff888009c6dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.548029] ^ [ 31.548465] ffff888009c6dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.549325] ffff888009c6de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.550171] ================================================================== [ 31.551279] Disabling lock debugging due to kernel taint [ 33.546843] BUG: Bad rss-counter state mm:00000000bb3cc4a7 type:MM_FILEPAGES val:33 [ 33.547979] BUG: Bad rss-counter state mm:00000000bb3cc4a7 type:MM_ANONPAGES val:22 [ 34.001587] BUG: Bad rss-counter state mm:00000000993cc80c type:MM_FILEPAGES val:33 [ 34.002705] BUG: Bad rss-counter state mm:00000000993cc80c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31194' (ECDSA) to the list of known hosts. 2023/06/20 21:25:24 fuzzer started 2023/06/20 21:25:24 dialing manager at localhost:36067 2023/06/20 21:25:24 checking machine... 2023/06/20 21:25:24 checking revisions... [ 34.682227] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:25:24 testing simple program... [ 34.727823] cgroup: Unknown subsys name 'net' [ 34.764318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:25:23 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f3e8b80 RCX=1ffff11001e7d208 RDX=1ffff11001e7d1b6 RSI=0000000000000004 RDI=ffff88800f4d7aa8 RBP=1ffff11001e9af76 RSP=ffff88800f4d7b38 R8 =0000000000000001 R9 =ffffed1001e9af55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f3e8d98 R13=0000000000000000 R14=ffff88800f3e8000 R15=ffff88800f3e8b80 RIP=ffffffff8302b452 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 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=00007fc1cdb3f618 CR3=000000000edb4000 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=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 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000200 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81807029 RBP=ffff88800e96f4f0 RSP=ffff88800e96f428 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff888008442140 R13=ffff88806cf3d150 R14=ffff88806cf3d150 R15=ffff88806cf3d130 RIP=ffffffff845118ab 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 00007fc1cd588900 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=00007ffe3c5bc000 CR3=000000000edb4000 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