syzkaller login: [ 28.702925] BUG: Bad rss-counter state mm:00000000904b8dca type:MM_FILEPAGES val:33 [ 28.703874] BUG: Bad rss-counter state mm:00000000904b8dca type:MM_ANONPAGES val:22 [ 28.877245] ================================================================== [ 28.878122] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.879020] Read of size 8 at addr ffff88800e1f3968 by task sshd/218 [ 28.879748] [ 28.880017] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.880824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.881737] Call Trace: [ 28.882065] [ 28.882336] dump_stack_lvl+0x91/0xf0 [ 28.882797] print_report+0xcc/0x620 [ 28.883254] ? __virt_addr_valid+0x102/0x340 [ 28.883777] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.884360] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.884941] kasan_report+0xbe/0xf0 [ 28.885395] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885988] vma_interval_tree_remove+0xc75/0xec0 [ 28.886640] vma_prepare+0xc54/0x11a0 [ 28.887097] __split_vma+0x5af/0x950 [ 28.887550] ? __pfx___split_vma+0x10/0x10 [ 28.888055] ? find_held_lock+0x2c/0x110 [ 28.888579] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.889141] ? lock_is_held_type+0x9f/0x120 [ 28.889674] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.890286] ? mtree_range_walk+0x632/0x900 [ 28.890832] ? mas_walk+0x5c7/0x7c0 [ 28.891304] do_vmi_munmap+0x1f1/0x2b0 [ 28.891787] mmap_region+0x1f9/0x2660 [ 28.892268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.892773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.893478] ? __pfx_lock_acquire+0x10/0x10 [ 28.894011] ? __pfx_mmap_region+0x10/0x10 [ 28.894556] ? security_mmap_addr+0x7d/0xa0 [ 28.895088] ? get_unmapped_area+0x1f5/0x3f0 [ 28.895625] do_mmap+0x854/0xf00 [ 28.896063] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.896556] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.897114] ksys_mmap_pgoff+0x3af/0x500 [ 28.897632] do_syscall_64+0x3f/0x90 [ 28.898111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.898757] RIP: 0033:0x7f1829a13d82 [ 28.899205] 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 [ 28.901362] RSP: 002b:00007fff18ae7538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.902275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1829a13d82 [ 28.903132] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1828e4d000 [ 28.903966] RBP: 00007f1828e4d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.904802] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555e7fcfd90 [ 28.905647] R13: 00007fff18ae7550 R14: 00007fff18ae7580 R15: 00007fff18ae78e0 [ 28.906525] [ 28.906811] [ 28.907023] Allocated by task 211: [ 28.907448] kasan_save_stack+0x22/0x50 [ 28.907945] kasan_set_track+0x25/0x30 [ 28.908427] __kasan_slab_alloc+0x59/0x70 [ 28.908946] kmem_cache_alloc+0x16b/0x370 [ 28.909455] vm_area_dup+0x20/0x160 [ 28.909912] __split_vma+0x170/0x950 [ 28.910383] split_vma+0xc6/0x110 [ 28.910814] mprotect_fixup+0x8d2/0xb30 [ 28.911313] do_mprotect_pkey+0x87e/0xd40 [ 28.911831] __x64_sys_mprotect+0x78/0xc0 [ 28.912352] do_syscall_64+0x3f/0x90 [ 28.912817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913455] [ 28.913667] Freed by task 211: [ 28.914067] kasan_save_stack+0x22/0x50 [ 28.914573] kasan_set_track+0x25/0x30 [ 28.915063] kasan_save_free_info+0x2b/0x50 [ 28.915584] __kasan_slab_free+0x10a/0x190 [ 28.916118] kmem_cache_free+0x10d/0x4d0 [ 28.916630] rcu_core+0x8c8/0x2860 [ 28.917078] __do_softirq+0x1b7/0x7d4 [ 28.917554] [ 28.917775] Last potentially related work creation: [ 28.918374] kasan_save_stack+0x22/0x50 [ 28.918869] __kasan_record_aux_stack+0x8e/0xa0 [ 28.919433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.920073] remove_vma+0x139/0x170 [ 28.920517] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.921067] do_vmi_munmap+0x1f1/0x2b0 [ 28.921560] __vm_munmap+0x138/0x3a0 [ 28.922032] __x64_sys_munmap+0x59/0x80 [ 28.922529] do_syscall_64+0x3f/0x90 [ 28.923005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.923640] [ 28.923852] Second to last potentially related work creation: [ 28.924538] kasan_save_stack+0x22/0x50 [ 28.925041] __kasan_record_aux_stack+0x8e/0xa0 [ 28.925604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.926270] remove_vma+0x139/0x170 [ 28.926713] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.927265] do_vmi_munmap+0x1f1/0x2b0 [ 28.927745] mmap_region+0x1f9/0x2660 [ 28.928229] do_mmap+0x854/0xf00 [ 28.928676] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.929187] ksys_mmap_pgoff+0x3af/0x500 [ 28.929705] do_syscall_64+0x3f/0x90 [ 28.930191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930844] [ 28.931063] The buggy address belongs to the object at ffff88800e1f3910 [ 28.931063] which belongs to the cache vm_area_struct of size 168 [ 28.932574] The buggy address is located 88 bytes inside of [ 28.932574] freed 168-byte region [ffff88800e1f3910, ffff88800e1f39b8) [ 28.934020] [ 28.934269] The buggy address belongs to the physical page: [ 28.934948] page:0000000018947bb5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f3 [ 28.936074] memcg:ffff88800e4f6001 [ 28.936515] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.937176] page_type: 0xffffffff() [ 28.937640] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.938580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4f6001 [ 28.939486] page dumped because: kasan: bad access detected [ 28.940143] [ 28.940357] Memory state around the buggy address: [ 28.940942] ffff88800e1f3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.941804] ffff88800e1f3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.942670] >ffff88800e1f3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.943567] ^ [ 28.944347] ffff88800e1f3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.945205] ffff88800e1f3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.946079] ================================================================== [ 28.947167] Disabling lock debugging due to kernel taint [ 30.756751] BUG: Bad rss-counter state mm:0000000047c3f584 type:MM_FILEPAGES val:33 [ 30.757523] BUG: Bad rss-counter state mm:0000000047c3f584 type:MM_ANONPAGES val:22 [ 31.321995] BUG: Bad rss-counter state mm:000000008168b9fe type:MM_FILEPAGES val:33 [ 31.323191] BUG: Bad rss-counter state mm:000000008168b9fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9113' (ECDSA) to the list of known hosts. 2023/06/21 03:31:15 fuzzer started 2023/06/21 03:31:15 dialing manager at localhost:36067 2023/06/21 03:31:15 checking machine... 2023/06/21 03:31:15 checking revisions... [ 31.942784] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:31:16 testing simple program... [ 31.982988] cgroup: Unknown subsys name 'net' [ 32.022408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:31:15 Registers: info registers vcpu 0 RAX=000000000000000e RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000dc0 RSI=000000000000000e RDI=ffff88800ea0faf8 RBP=ffff888008441500 RSP=ffff88800ea0fa20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff88800ea0fa88 R15=ffff8880141f4000 RIP=ffffffff822703f4 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 00007fb53cfe6900 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=00007fb53d59b650 CR3=00000000181ce000 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=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 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=0000000000000001 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=00007fff8f907d78 CR3=000000000f610000 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=2035313a31333a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a31333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000