syzkaller login: [ 32.770334] BUG: Bad rss-counter state mm:0000000063c759f8 type:MM_FILEPAGES val:33 [ 32.771540] BUG: Bad rss-counter state mm:0000000063c759f8 type:MM_ANONPAGES val:22 [ 32.953140] ================================================================== [ 32.953894] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.954624] Read of size 8 at addr ffff888018dfcc20 by task sshd/221 [ 32.955318] [ 32.955480] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.956136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.956882] Call Trace: [ 32.957128] [ 32.957363] dump_stack_lvl+0x91/0xf0 [ 32.957741] print_report+0xcc/0x620 [ 32.958117] ? __virt_addr_valid+0x102/0x340 [ 32.958539] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.959004] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.959472] kasan_report+0xbe/0xf0 [ 32.959835] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.960311] vma_interval_tree_remove+0xc75/0xec0 [ 32.960769] vma_prepare+0xc54/0x11a0 [ 32.961152] __split_vma+0x5af/0x950 [ 32.961519] ? __pfx___split_vma+0x10/0x10 [ 32.961925] ? find_held_lock+0x2c/0x110 [ 32.962324] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.962760] ? lock_is_held_type+0x9f/0x120 [ 32.963173] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.963639] ? mtree_range_walk+0x632/0x900 [ 32.964061] ? mas_walk+0x5c7/0x7c0 [ 32.964422] do_vmi_munmap+0x1f1/0x2b0 [ 32.964799] mmap_region+0x1f9/0x2660 [ 32.965185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.965520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.965928] ? __pfx_lock_acquire+0x10/0x10 [ 32.966232] ? __pfx_mmap_region+0x10/0x10 [ 32.966538] ? security_mmap_addr+0x7d/0xa0 [ 32.966852] ? get_unmapped_area+0x1f5/0x3f0 [ 32.967182] do_mmap+0x854/0xf00 [ 32.967438] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.967712] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.968021] ksys_mmap_pgoff+0x3af/0x500 [ 32.968301] do_syscall_64+0x3f/0x90 [ 32.968570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.968976] RIP: 0033:0x7fe2dfac0d82 [ 32.969257] 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 [ 32.970537] RSP: 002b:00007ffe93e5d048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.971093] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2dfac0d82 [ 32.971584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2deefa000 [ 32.972101] RBP: 00007fe2deefa000 R08: 0000000000000009 R09: 0000000000001000 [ 32.972613] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d76c7d4b20 [ 32.973129] R13: 00007ffe93e5d060 R14: 00007ffe93e5d090 R15: 00007ffe93e5d3f0 [ 32.973660] [ 32.973844] [ 32.973967] Allocated by task 214: [ 32.974226] kasan_save_stack+0x22/0x50 [ 32.974547] kasan_set_track+0x25/0x30 [ 32.974845] __kasan_slab_alloc+0x59/0x70 [ 32.975146] kmem_cache_alloc+0x16b/0x370 [ 32.975446] vm_area_dup+0x20/0x160 [ 32.975712] __split_vma+0x170/0x950 [ 32.975979] split_vma+0xc6/0x110 [ 32.976232] mprotect_fixup+0x8d2/0xb30 [ 32.976517] do_mprotect_pkey+0x87e/0xd40 [ 32.976826] __x64_sys_mprotect+0x78/0xc0 [ 32.977143] do_syscall_64+0x3f/0x90 [ 32.977417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.977794] [ 32.977921] Freed by task 214: [ 32.978143] kasan_save_stack+0x22/0x50 [ 32.978437] kasan_set_track+0x25/0x30 [ 32.978725] kasan_save_free_info+0x2b/0x50 [ 32.979033] __kasan_slab_free+0x10a/0x190 [ 32.979345] kmem_cache_free+0x10d/0x4d0 [ 32.979637] rcu_core+0x8c8/0x2860 [ 32.979902] __do_softirq+0x1b7/0x7d4 [ 32.980178] [ 32.980299] Last potentially related work creation: [ 32.980646] kasan_save_stack+0x22/0x50 [ 32.980949] __kasan_record_aux_stack+0x8e/0xa0 [ 32.981282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.981653] remove_vma+0x139/0x170 [ 32.981911] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.982236] do_vmi_munmap+0x1f1/0x2b0 [ 32.982522] __vm_munmap+0x138/0x3a0 [ 32.982812] __x64_sys_munmap+0x59/0x80 [ 32.983106] do_syscall_64+0x3f/0x90 [ 32.983387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.983765] [ 32.983887] The buggy address belongs to the object at ffff888018dfcbc8 [ 32.983887] which belongs to the cache vm_area_struct of size 168 [ 32.984692] The buggy address is located 88 bytes inside of [ 32.984692] freed 168-byte region [ffff888018dfcbc8, ffff888018dfcc70) [ 32.985476] [ 32.985595] The buggy address belongs to the physical page: [ 32.985954] page:0000000026222a04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18dfc [ 32.986556] memcg:ffff88800cc27c01 [ 32.986789] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.987148] page_type: 0xffffffff() [ 32.987398] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.987908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc27c01 [ 32.988396] page dumped because: kasan: bad access detected [ 32.988768] [ 32.988901] Memory state around the buggy address: [ 32.989224] ffff888018dfcb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.989692] ffff888018dfcb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.990176] >ffff888018dfcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.990638] ^ [ 32.990935] ffff888018dfcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.991401] ffff888018dfcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.991873] ================================================================== [ 32.992754] Disabling lock debugging due to kernel taint [ 34.975163] BUG: Bad rss-counter state mm:0000000045c597be type:MM_FILEPAGES val:33 [ 34.976314] BUG: Bad rss-counter state mm:0000000045c597be type:MM_ANONPAGES val:22 [ 35.558774] BUG: Bad rss-counter state mm:000000006b4a63f2 type:MM_FILEPAGES val:33 [ 35.559930] BUG: Bad rss-counter state mm:000000006b4a63f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46059' (ECDSA) to the list of known hosts. 2023/06/19 11:04:46 fuzzer started 2023/06/19 11:04:47 dialing manager at localhost:44161 2023/06/19 11:04:47 checking machine... 2023/06/19 11:04:47 checking revisions... [ 36.196368] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:04:47 testing simple program... [ 36.233980] cgroup: Unknown subsys name 'net' [ 36.275404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:04:44 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=00007ffeb479bdb8 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=00007f7c6fb48510000055bda728b790 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=dffffc0000000000 RBX=0000000000000040 RCX=0000000000000000 RDX=1ffffd40000e47e0 RSI=ffffffff817c046c RDI=0000000000000005 RBP=ffffea0000723f00 RSP=ffff888016b0fd00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=ffffea0000723f00 R13=ffff88800e817930 R14=0000000000000001 R15=0100000000000000 RIP=ffffffff8209c0a4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffb069db900 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=00007ffd509eeb6c CR3=000000001ab90000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=e669ebe642341d8be9d0c2c6c5baa524 XMM05=000000000000000000000000000000ff XMM06=a82579e609341d8b1508784dc5a9a500 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000