syzkaller login: [ 31.715970] BUG: Bad rss-counter state mm:000000001b250337 type:MM_FILEPAGES val:33 [ 31.716956] BUG: Bad rss-counter state mm:000000001b250337 type:MM_ANONPAGES val:22 [ 31.879731] ================================================================== [ 31.880831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.881853] Read of size 8 at addr ffff88800e82c310 by task sshd/220 [ 31.882713] [ 31.882980] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.883944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.885022] Call Trace: [ 31.885378] [ 31.885689] dump_stack_lvl+0x91/0xf0 [ 31.886230] print_report+0xcc/0x620 [ 31.886783] ? __virt_addr_valid+0x102/0x340 [ 31.887400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.888073] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.888738] kasan_report+0xbe/0xf0 [ 31.889259] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.889940] vma_interval_tree_remove+0xc75/0xec0 [ 31.890604] vma_prepare+0xc54/0x11a0 [ 31.891147] __split_vma+0x5af/0x950 [ 31.891665] ? __pfx___split_vma+0x10/0x10 [ 31.892254] ? find_held_lock+0x2c/0x110 [ 31.892833] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.893461] ? lock_is_held_type+0x9f/0x120 [ 31.894052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.894723] ? mtree_range_walk+0x632/0x900 [ 31.895349] ? mas_walk+0x5c7/0x7c0 [ 31.895874] do_vmi_munmap+0x1f1/0x2b0 [ 31.896418] mmap_region+0x1f9/0x2660 [ 31.896948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.897512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.898296] ? __pfx_lock_acquire+0x10/0x10 [ 31.898888] ? __pfx_mmap_region+0x10/0x10 [ 31.899470] ? security_mmap_addr+0x7d/0xa0 [ 31.900057] ? get_unmapped_area+0x1f5/0x3f0 [ 31.900661] do_mmap+0x854/0xf00 [ 31.901144] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.901692] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.902317] ksys_mmap_pgoff+0x3af/0x500 [ 31.902893] do_syscall_64+0x3f/0x90 [ 31.903431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.904150] RIP: 0033:0x7f4e4cac4d82 [ 31.904658] 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 [ 31.907029] RSP: 002b:00007fff9f5f04e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.908041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e4cac4d82 [ 31.908986] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e4befe000 [ 31.909928] RBP: 00007f4e4befe000 R08: 0000000000000009 R09: 0000000000001000 [ 31.910878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c50140eb20 [ 31.911820] R13: 00007fff9f5f0500 R14: 00007fff9f5f0530 R15: 00007fff9f5f0890 [ 31.912778] [ 31.913101] [ 31.913340] Allocated by task 213: [ 31.913825] kasan_save_stack+0x22/0x50 [ 31.914387] kasan_set_track+0x25/0x30 [ 31.914956] __kasan_slab_alloc+0x59/0x70 [ 31.915541] kmem_cache_alloc+0x16b/0x370 [ 31.916129] vm_area_dup+0x20/0x160 [ 31.916634] __split_vma+0x170/0x950 [ 31.917156] split_vma+0xc6/0x110 [ 31.917652] mprotect_fixup+0x8d2/0xb30 [ 31.918226] do_mprotect_pkey+0x87e/0xd40 [ 31.918813] __x64_sys_mprotect+0x78/0xc0 [ 31.919409] do_syscall_64+0x3f/0x90 [ 31.919947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.920673] [ 31.920918] Freed by task 19: [ 31.921354] kasan_save_stack+0x22/0x50 [ 31.921928] kasan_set_track+0x25/0x30 [ 31.922487] kasan_save_free_info+0x2b/0x50 [ 31.923096] __kasan_slab_free+0x10a/0x190 [ 31.923686] kmem_cache_free+0x10d/0x4d0 [ 31.924249] rcu_core+0x8c8/0x2860 [ 31.924736] __do_softirq+0x1b7/0x7d4 [ 31.925264] [ 31.925503] Last potentially related work creation: [ 31.926154] kasan_save_stack+0x22/0x50 [ 31.926718] __kasan_record_aux_stack+0x8e/0xa0 [ 31.927376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.928085] remove_vma+0x139/0x170 [ 31.928582] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.929199] do_vmi_munmap+0x1f1/0x2b0 [ 31.929732] __vm_munmap+0x138/0x3a0 [ 31.930246] __x64_sys_munmap+0x59/0x80 [ 31.930787] do_syscall_64+0x3f/0x90 [ 31.931327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.932043] [ 31.932282] Second to last potentially related work creation: [ 31.933038] kasan_save_stack+0x22/0x50 [ 31.933599] __kasan_record_aux_stack+0x8e/0xa0 [ 31.934238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.934966] remove_vma+0x139/0x170 [ 31.935469] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.936099] do_vmi_munmap+0x1f1/0x2b0 [ 31.936644] mmap_region+0x1f9/0x2660 [ 31.937177] do_mmap+0x854/0xf00 [ 31.937656] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.938200] ksys_mmap_pgoff+0x3af/0x500 [ 31.938758] do_syscall_64+0x3f/0x90 [ 31.939307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.940024] [ 31.940266] The buggy address belongs to the object at ffff88800e82c2b8 [ 31.940266] which belongs to the cache vm_area_struct of size 168 [ 31.941901] The buggy address is located 88 bytes inside of [ 31.941901] freed 168-byte region [ffff88800e82c2b8, ffff88800e82c360) [ 31.943474] [ 31.943714] The buggy address belongs to the physical page: [ 31.944450] page:00000000636db511 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe82c [ 31.945659] memcg:ffff88800ed7db01 [ 31.946140] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.946883] page_type: 0xffffffff() [ 31.947384] raw: 0100000000000200 ffff8880087a0c80 ffffea000036e980 dead000000000008 [ 31.948408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed7db01 [ 31.949423] page dumped because: kasan: bad access detected [ 31.950162] [ 31.950405] Memory state around the buggy address: [ 31.951064] ffff88800e82c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.952024] ffff88800e82c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.952982] >ffff88800e82c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.953934] ^ [ 31.954459] ffff88800e82c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.955437] ffff88800e82c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.956394] ================================================================== [ 31.957542] Disabling lock debugging due to kernel taint [ 34.039664] BUG: Bad rss-counter state mm:0000000082623a02 type:MM_FILEPAGES val:33 [ 34.040587] BUG: Bad rss-counter state mm:0000000082623a02 type:MM_ANONPAGES val:22 [ 34.470687] BUG: Bad rss-counter state mm:00000000f88df938 type:MM_FILEPAGES val:33 [ 34.471886] BUG: Bad rss-counter state mm:00000000f88df938 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64570' (ECDSA) to the list of known hosts. 2023/06/20 15:05:39 fuzzer started 2023/06/20 15:05:39 dialing manager at localhost:36067 2023/06/20 15:05:39 checking machine... 2023/06/20 15:05:39 checking revisions... [ 35.172602] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:05:40 testing simple program... [ 35.219945] cgroup: Unknown subsys name 'net' [ 35.279635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:05:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f97d1c0 RSI=0000000000000004 RDI=ffff88800e29e85c RBP=ffff88800e29e780 RSP=ffff888006a97af0 R8 =0000000000000005 R9 =000000000000000f R10=0000000000000000 R11=0000090700000907 R12=ffff88800e29e85c R13=ffff88800e29e780 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff8180fea4 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 00007f6bf1ac0900 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=00007f6bf2077618 CR3=000000001658e000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f2dd1a080f0 CR3=000000000c892000 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=7f6a0995d78507824345105f2823ad4b XMM02=2c67c8bc2e329bc30000000000119eb0 XMM03=fb795ef6d657705600000000001213f0 XMM04=af11863258c1707b00000000000ae988 XMM05=3fd8ad34c680710400000000001329f8 XMM06=4fda316b135da52b00000000001323f0 XMM07=e042d86d42eb936e0000000000121670 XMM08=67bf31b1d28bd0800000000000119f10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000