syzkaller login: [ 41.766632] BUG: Bad rss-counter state mm:00000000b8303d5d type:MM_FILEPAGES val:33 [ 41.768454] BUG: Bad rss-counter state mm:00000000b8303d5d type:MM_ANONPAGES val:22 [ 41.934200] ================================================================== [ 41.935325] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.936481] Read of size 8 at addr ffff88800ed03140 by task sshd/219 [ 41.937669] [ 41.937886] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.938756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.939751] Call Trace: [ 41.940071] [ 41.940366] dump_stack_lvl+0x91/0xf0 [ 41.940871] print_report+0xcc/0x620 [ 41.941354] ? __virt_addr_valid+0x102/0x340 [ 41.941907] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.942541] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.943156] kasan_report+0xbe/0xf0 [ 41.943642] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.944275] vma_interval_tree_remove+0xc75/0xec0 [ 41.944899] vma_prepare+0xc54/0x11a0 [ 41.945392] __split_vma+0x5af/0x950 [ 41.945889] ? __pfx___split_vma+0x10/0x10 [ 41.946429] ? find_held_lock+0x2c/0x110 [ 41.946958] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.947536] ? lock_is_held_type+0x9f/0x120 [ 41.948075] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.948698] ? mtree_range_walk+0x632/0x900 [ 41.949273] ? mas_walk+0x5c7/0x7c0 [ 41.949761] do_vmi_munmap+0x1f1/0x2b0 [ 41.950261] mmap_region+0x1f9/0x2660 [ 41.950751] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.951282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.952013] ? __pfx_lock_acquire+0x10/0x10 [ 41.952556] ? __pfx_mmap_region+0x10/0x10 [ 41.953100] ? security_mmap_addr+0x7d/0xa0 [ 41.953642] ? get_unmapped_area+0x1f5/0x3f0 [ 41.954193] do_mmap+0x854/0xf00 [ 41.954644] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.955143] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.955715] ksys_mmap_pgoff+0x3af/0x500 [ 41.956230] do_syscall_64+0x3f/0x90 [ 41.956721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.957400] RIP: 0033:0x7f28ec652d82 [ 41.957867] 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 [ 41.960024] RSP: 002b:00007ffc48dd4548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.960949] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28ec652d82 [ 41.961803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28eba8c000 [ 41.962649] RBP: 00007f28eba8c000 R08: 0000000000000009 R09: 0000000000001000 [ 41.963497] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632df274ec0 [ 41.964347] R13: 00007ffc48dd4560 R14: 00007ffc48dd4590 R15: 00007ffc48dd48f0 [ 41.965219] [ 41.965518] [ 41.965737] Allocated by task 212: [ 41.966169] kasan_save_stack+0x22/0x50 [ 41.966686] kasan_set_track+0x25/0x30 [ 41.967179] __kasan_slab_alloc+0x59/0x70 [ 41.967704] kmem_cache_alloc+0x16b/0x370 [ 41.968223] vm_area_dup+0x20/0x160 [ 41.968708] __split_vma+0x170/0x950 [ 41.969209] split_vma+0xc6/0x110 [ 41.969650] mprotect_fixup+0x8d2/0xb30 [ 41.970152] do_mprotect_pkey+0x87e/0xd40 [ 41.970683] __x64_sys_mprotect+0x78/0xc0 [ 41.971204] do_syscall_64+0x3f/0x90 [ 41.971682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.972328] [ 41.972547] Freed by task 212: [ 41.972953] kasan_save_stack+0x22/0x50 [ 41.973469] kasan_set_track+0x25/0x30 [ 41.973969] kasan_save_free_info+0x2b/0x50 [ 41.974504] __kasan_slab_free+0x10a/0x190 [ 41.975041] kmem_cache_free+0x10d/0x4d0 [ 41.975549] rcu_core+0x8c8/0x2860 [ 41.975994] __do_softirq+0x1b7/0x7d4 [ 41.976476] [ 41.976699] Last potentially related work creation: [ 41.977317] kasan_save_stack+0x22/0x50 [ 41.977829] __kasan_record_aux_stack+0x8e/0xa0 [ 41.978499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.979146] remove_vma+0x139/0x170 [ 41.979606] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.980176] do_vmi_munmap+0x1f1/0x2b0 [ 41.980671] __vm_munmap+0x138/0x3a0 [ 41.981152] __x64_sys_munmap+0x59/0x80 [ 41.981650] do_syscall_64+0x3f/0x90 [ 41.982124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.982768] [ 41.982986] The buggy address belongs to the object at ffff88800ed030e8 [ 41.982986] which belongs to the cache vm_area_struct of size 168 [ 41.984462] The buggy address is located 88 bytes inside of [ 41.984462] freed 168-byte region [ffff88800ed030e8, ffff88800ed03190) [ 41.985902] [ 41.986124] The buggy address belongs to the physical page: [ 41.986786] page:00000000423d4070 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed03 [ 41.987871] memcg:ffff88800d5ff901 [ 41.988299] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.988971] page_type: 0xffffffff() [ 41.989428] raw: 0100000000000200 ffff88800879fc80 ffffea00003b50c0 dead000000000008 [ 41.990357] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5ff901 [ 41.991270] page dumped because: kasan: bad access detected [ 41.991933] [ 41.992150] Memory state around the buggy address: [ 41.992735] ffff88800ed03000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.993604] ffff88800ed03080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 41.994468] >ffff88800ed03100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.995315] ^ [ 41.995966] ffff88800ed03180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.996839] ffff88800ed03200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.997700] ================================================================== [ 41.998640] Disabling lock debugging due to kernel taint [ 44.007259] BUG: Bad rss-counter state mm:00000000a1dffef4 type:MM_FILEPAGES val:33 [ 44.007846] BUG: Bad rss-counter state mm:00000000a1dffef4 type:MM_ANONPAGES val:22 [ 44.503716] BUG: Bad rss-counter state mm:000000004e8bc075 type:MM_FILEPAGES val:33 [ 44.504424] BUG: Bad rss-counter state mm:000000004e8bc075 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62508' (ECDSA) to the list of known hosts. 2023/06/20 02:46:54 fuzzer started 2023/06/20 02:46:54 dialing manager at localhost:44161 2023/06/20 02:46:54 checking machine... 2023/06/20 02:46:54 checking revisions... [ 45.212763] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:46:54 testing simple program... [ 45.263830] cgroup: Unknown subsys name 'net' [ 45.303783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:46:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff2c80e838 CR3=0000000005482000 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=00007fad2248b510000055a107196790 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 info registers vcpu 1 RAX=1ffff11001afd039 RBX=ffff88800d7e8198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d7e81d0 RBP=ffff88801994e858 RSP=ffff888018d8fc98 R8 =0000000000000001 R9 =ffffed10031b1f87 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888019b8fbe8 R14=ffffffff818c75ae R15=ffff88800982a580 RIP=ffffffff81846375 RFL=00000083 [--S---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 00007f75d1195900 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=00007f75d174c618 CR3=000000000de84000 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=563412feff00545000000000000080fe 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