syzkaller login: [ 32.232469] BUG: Bad rss-counter state mm:000000003daf3c75 type:MM_FILEPAGES val:33 [ 32.233681] BUG: Bad rss-counter state mm:000000003daf3c75 type:MM_ANONPAGES val:22 [ 32.384071] ================================================================== [ 32.385057] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.386062] Read of size 8 at addr ffff88800fd09058 by task sshd/219 [ 32.386996] [ 32.387227] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.388139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.389212] Call Trace: [ 32.389557] [ 32.389855] dump_stack_lvl+0x91/0xf0 [ 32.390377] print_report+0xcc/0x620 [ 32.390889] ? __virt_addr_valid+0x102/0x340 [ 32.391469] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.392120] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.392773] kasan_report+0xbe/0xf0 [ 32.393298] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.393955] vma_interval_tree_remove+0xc75/0xec0 [ 32.394597] vma_prepare+0xc54/0x11a0 [ 32.395104] __split_vma+0x5af/0x950 [ 32.395607] ? __pfx___split_vma+0x10/0x10 [ 32.396170] ? find_held_lock+0x2c/0x110 [ 32.396723] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.397334] ? lock_is_held_type+0x9f/0x120 [ 32.397907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.398550] ? mtree_range_walk+0x632/0x900 [ 32.399146] ? mas_walk+0x5c7/0x7c0 [ 32.399665] do_vmi_munmap+0x1f1/0x2b0 [ 32.400200] mmap_region+0x1f9/0x2660 [ 32.400726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.401303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.402080] ? __pfx_lock_acquire+0x10/0x10 [ 32.402660] ? __pfx_mmap_region+0x10/0x10 [ 32.403239] ? security_mmap_addr+0x7d/0xa0 [ 32.403812] ? get_unmapped_area+0x1f5/0x3f0 [ 32.404408] do_mmap+0x854/0xf00 [ 32.404889] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.405424] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.406035] ksys_mmap_pgoff+0x3af/0x500 [ 32.406596] do_syscall_64+0x3f/0x90 [ 32.407120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.407819] RIP: 0033:0x7f164b2bad82 [ 32.408314] 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 [ 32.410637] RSP: 002b:00007ffe8fd70528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.411625] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f164b2bad82 [ 32.412546] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f164a6f4000 [ 32.413491] RBP: 00007f164a6f4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.414412] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e959caec0 [ 32.415335] R13: 00007ffe8fd70540 R14: 00007ffe8fd70570 R15: 00007ffe8fd708d0 [ 32.416274] [ 32.416590] [ 32.416821] Allocated by task 212: [ 32.417305] kasan_save_stack+0x22/0x50 [ 32.417865] kasan_set_track+0x25/0x30 [ 32.418401] __kasan_slab_alloc+0x59/0x70 [ 32.418971] kmem_cache_alloc+0x16b/0x370 [ 32.419537] vm_area_dup+0x20/0x160 [ 32.420035] __split_vma+0x170/0x950 [ 32.420540] split_vma+0xc6/0x110 [ 32.421032] mprotect_fixup+0x8d2/0xb30 [ 32.421586] do_mprotect_pkey+0x87e/0xd40 [ 32.422158] __x64_sys_mprotect+0x78/0xc0 [ 32.422727] do_syscall_64+0x3f/0x90 [ 32.423245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.423949] [ 32.424190] Freed by task 212: [ 32.424623] kasan_save_stack+0x22/0x50 [ 32.425178] kasan_set_track+0x25/0x30 [ 32.425718] kasan_save_free_info+0x2b/0x50 [ 32.426302] __kasan_slab_free+0x10a/0x190 [ 32.426876] kmem_cache_free+0x10d/0x4d0 [ 32.427433] rcu_core+0x8c8/0x2860 [ 32.427921] __do_softirq+0x1b7/0x7d4 [ 32.428440] [ 32.428672] Last potentially related work creation: [ 32.429328] kasan_save_stack+0x22/0x50 [ 32.429883] __kasan_record_aux_stack+0x8e/0xa0 [ 32.430503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.431205] remove_vma+0x139/0x170 [ 32.431696] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.432296] do_vmi_munmap+0x1f1/0x2b0 [ 32.432845] __vm_munmap+0x138/0x3a0 [ 32.433359] __x64_sys_munmap+0x59/0x80 [ 32.433932] do_syscall_64+0x3f/0x90 [ 32.434445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.435150] [ 32.435380] Second to last potentially related work creation: [ 32.436125] kasan_save_stack+0x22/0x50 [ 32.436672] __kasan_record_aux_stack+0x8e/0xa0 [ 32.437312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.438017] remove_vma+0x139/0x170 [ 32.438518] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.439131] do_vmi_munmap+0x1f1/0x2b0 [ 32.439661] mmap_region+0x1f9/0x2660 [ 32.440181] do_mmap+0x854/0xf00 [ 32.440647] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.441187] ksys_mmap_pgoff+0x3af/0x500 [ 32.441736] do_syscall_64+0x3f/0x90 [ 32.442254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.442961] [ 32.443197] The buggy address belongs to the object at ffff88800fd09000 [ 32.443197] which belongs to the cache vm_area_struct of size 168 [ 32.444799] The buggy address is located 88 bytes inside of [ 32.444799] freed 168-byte region [ffff88800fd09000, ffff88800fd090a8) [ 32.446371] [ 32.446606] The buggy address belongs to the physical page: [ 32.447336] page:00000000b597d0e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd09 [ 32.448528] memcg:ffff888019e17c01 [ 32.448997] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.449702] page_type: 0xffffffff() [ 32.450187] raw: 0100000000000200 ffff88800879fc80 ffffea0000678b80 000000000000000a [ 32.451192] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e17c01 [ 32.452182] page dumped because: kasan: bad access detected [ 32.452908] [ 32.453147] Memory state around the buggy address: [ 32.453785] ffff88800fd08f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.454725] ffff88800fd08f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.455649] >ffff88800fd09000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.456579] ^ [ 32.457385] ffff88800fd09080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.458321] ffff88800fd09100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.459255] ================================================================== [ 32.460528] Disabling lock debugging due to kernel taint [ 34.286192] BUG: Bad rss-counter state mm:000000008dc9e7ea type:MM_FILEPAGES val:33 [ 34.287032] BUG: Bad rss-counter state mm:000000008dc9e7ea type:MM_ANONPAGES val:22 [ 34.743323] BUG: Bad rss-counter state mm:000000005c71c2ae type:MM_FILEPAGES val:33 [ 34.744510] BUG: Bad rss-counter state mm:000000005c71c2ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49144' (ECDSA) to the list of known hosts. 2023/06/19 12:24:59 fuzzer started 2023/06/19 12:24:59 dialing manager at localhost:44161 2023/06/19 12:24:59 checking machine... 2023/06/19 12:24:59 checking revisions... [ 35.425365] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:24:59 testing simple program... [ 35.471744] cgroup: Unknown subsys name 'net' [ 35.516400] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:57 Registers: info registers vcpu 0 RAX=ffff888019f09000 RBX=0000000000000800 RCX=0000000000000000 RDX=0000000000000800 RSI=0000000000000000 RDI=ffff888019f09000 RBP=ffff888017f8fcd8 RSP=ffff888017f8fc80 R8 =ffff888019f09000 R9 =0000000000000000 R10=ffffed10033e1200 R11=ffffffff81806df1 R12=ffff888008442000 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180ae1c 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 00007f04c89e3900 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=00007f04c8f9a618 CR3=000000000e6c4000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f04c8f9b0b0 CR3=000000000e6c4000 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