syzkaller login: [ 30.587635] BUG: Bad rss-counter state mm:000000008e6e361a type:MM_FILEPAGES val:33 [ 30.588188] BUG: Bad rss-counter state mm:000000008e6e361a type:MM_ANONPAGES val:22 [ 30.748938] ================================================================== [ 30.750107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.751333] Read of size 8 at addr ffff888016c0b4e0 by task sshd/221 [ 30.752263] [ 30.752482] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.753356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.754364] Call Trace: [ 30.754697] [ 30.754979] dump_stack_lvl+0x91/0xf0 [ 30.755478] print_report+0xcc/0x620 [ 30.755962] ? __virt_addr_valid+0x102/0x340 [ 30.756513] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757133] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757753] kasan_report+0xbe/0xf0 [ 30.758242] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758908] vma_interval_tree_remove+0xc75/0xec0 [ 30.759551] vma_prepare+0xc54/0x11a0 [ 30.760057] __split_vma+0x5af/0x950 [ 30.760565] ? __pfx___split_vma+0x10/0x10 [ 30.761128] ? find_held_lock+0x2c/0x110 [ 30.761677] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.762298] ? lock_is_held_type+0x9f/0x120 [ 30.762864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.763493] ? mtree_range_walk+0x632/0x900 [ 30.764071] ? mas_walk+0x5c7/0x7c0 [ 30.764574] do_vmi_munmap+0x1f1/0x2b0 [ 30.765101] mmap_region+0x1f9/0x2660 [ 30.765614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.766167] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.766927] ? __pfx_lock_acquire+0x10/0x10 [ 30.767495] ? __pfx_mmap_region+0x10/0x10 [ 30.768051] ? security_mmap_addr+0x7d/0xa0 [ 30.768608] ? get_unmapped_area+0x1f5/0x3f0 [ 30.769193] do_mmap+0x854/0xf00 [ 30.769650] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.770190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.770779] ksys_mmap_pgoff+0x3af/0x500 [ 30.771319] do_syscall_64+0x3f/0x90 [ 30.771820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772496] RIP: 0033:0x7f2b6bd58d82 [ 30.772977] 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 [ 30.775264] RSP: 002b:00007ffde866db08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.776226] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b6bd58d82 [ 30.777127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b6b192000 [ 30.778025] RBP: 00007f2b6b192000 R08: 0000000000000009 R09: 0000000000001000 [ 30.778939] R10: 0000000000000812 R11: 0000000000000206 R12: 000056245657ad90 [ 30.779835] R13: 00007ffde866db20 R14: 00007ffde866db50 R15: 00007ffde866deb0 [ 30.780752] [ 30.781055] [ 30.781280] Allocated by task 214: [ 30.781728] kasan_save_stack+0x22/0x50 [ 30.782271] kasan_set_track+0x25/0x30 [ 30.782792] __kasan_slab_alloc+0x59/0x70 [ 30.783353] kmem_cache_alloc+0x16b/0x370 [ 30.783897] vm_area_dup+0x20/0x160 [ 30.784375] __split_vma+0x170/0x950 [ 30.784859] split_vma+0xc6/0x110 [ 30.785316] mprotect_fixup+0x8d2/0xb30 [ 30.785844] do_mprotect_pkey+0x87e/0xd40 [ 30.786401] __x64_sys_mprotect+0x78/0xc0 [ 30.786951] do_syscall_64+0x3f/0x90 [ 30.787450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788131] [ 30.788359] Freed by task 214: [ 30.788770] kasan_save_stack+0x22/0x50 [ 30.789304] kasan_set_track+0x25/0x30 [ 30.789827] kasan_save_free_info+0x2b/0x50 [ 30.790409] __kasan_slab_free+0x10a/0x190 [ 30.790975] kmem_cache_free+0x10d/0x4d0 [ 30.791519] rcu_core+0x8c8/0x2860 [ 30.791984] __do_softirq+0x1b7/0x7d4 [ 30.792489] [ 30.792803] Last potentially related work creation: [ 30.793443] kasan_save_stack+0x22/0x50 [ 30.793976] __kasan_record_aux_stack+0x8e/0xa0 [ 30.794591] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.795271] remove_vma+0x139/0x170 [ 30.795748] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.796337] do_vmi_munmap+0x1f1/0x2b0 [ 30.796853] __vm_munmap+0x138/0x3a0 [ 30.797343] __x64_sys_munmap+0x59/0x80 [ 30.797853] do_syscall_64+0x3f/0x90 [ 30.798369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799043] [ 30.799268] The buggy address belongs to the object at ffff888016c0b488 [ 30.799268] which belongs to the cache vm_area_struct of size 168 [ 30.800819] The buggy address is located 88 bytes inside of [ 30.800819] freed 168-byte region [ffff888016c0b488, ffff888016c0b530) [ 30.802300] [ 30.802525] The buggy address belongs to the physical page: [ 30.803213] page:0000000021fb57a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c0b [ 30.804362] memcg:ffff88800ec62101 [ 30.804804] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.805481] page_type: 0xffffffff() [ 30.805950] raw: 0100000000000200 ffff8880087a0c80 ffffea000031a640 dead000000000004 [ 30.806931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec62101 [ 30.807889] page dumped because: kasan: bad access detected [ 30.808588] [ 30.808817] Memory state around the buggy address: [ 30.809419] ffff888016c0b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.810334] ffff888016c0b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.811234] >ffff888016c0b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.812131] ^ [ 30.812917] ffff888016c0b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.813812] ffff888016c0b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.814720] ================================================================== [ 30.815749] Disabling lock debugging due to kernel taint [ 32.686303] BUG: Bad rss-counter state mm:0000000045a8fac6 type:MM_FILEPAGES val:33 [ 32.687378] BUG: Bad rss-counter state mm:0000000045a8fac6 type:MM_ANONPAGES val:22 [ 33.097478] BUG: Bad rss-counter state mm:00000000203e22a7 type:MM_FILEPAGES val:33 [ 33.099131] BUG: Bad rss-counter state mm:00000000203e22a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41497' (ECDSA) to the list of known hosts. 2023/06/21 00:23:07 fuzzer started 2023/06/21 00:23:08 dialing manager at localhost:36067 2023/06/21 00:23:08 checking machine... 2023/06/21 00:23:08 checking revisions... [ 33.993544] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:23:08 testing simple program... [ 34.047682] cgroup: Unknown subsys name 'net' [ 34.106931] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:23:07 Registers: info registers vcpu 0 RAX=ffffffff8450cc7f RBX=000000000000000b RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000d RDI=ffff88800f1cf6b0 RBP=dffffc0000000000 RSP=ffff88800f1cf5c8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000000 R14=ffff88800f1cf658 R15=00000000000000a4 RIP=ffffffff813ad649 RFL=00000287 [--S--PC] 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 00007fc6b9347900 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=00007ffe5f528000 CR3=000000000e772000 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=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 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=00007fff2384d428 CR3=0000000005482000 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=00007f41db255510000055f09abd1790 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