syzkaller login: [ 40.810056] BUG: Bad rss-counter state mm:0000000068ef6776 type:MM_FILEPAGES val:33 [ 40.811383] BUG: Bad rss-counter state mm:0000000068ef6776 type:MM_ANONPAGES val:22 [ 40.856185] ================================================================== [ 40.857252] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.858287] Read of size 8 at addr ffff88800e184b38 by task sshd/220 [ 40.859106] [ 40.859347] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.860275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.861327] Call Trace: [ 40.861679] [ 40.862030] dump_stack_lvl+0x91/0xf0 [ 40.862573] print_report+0xcc/0x620 [ 40.863113] ? __virt_addr_valid+0x102/0x340 [ 40.863731] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.864442] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.865157] kasan_report+0xbe/0xf0 [ 40.865710] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.866454] vma_interval_tree_remove+0xc75/0xec0 [ 40.867149] vma_prepare+0xc54/0x11a0 [ 40.867703] __split_vma+0x5af/0x950 [ 40.868252] ? __pfx___split_vma+0x10/0x10 [ 40.868867] ? find_held_lock+0x2c/0x110 [ 40.869473] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.870156] ? lock_is_held_type+0x9f/0x120 [ 40.870782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.871480] ? mtree_range_walk+0x632/0x900 [ 40.872119] ? mas_walk+0x5c7/0x7c0 [ 40.872664] do_vmi_munmap+0x1f1/0x2b0 [ 40.873240] mmap_region+0x1f9/0x2660 [ 40.873822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.874422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.875251] ? __pfx_lock_acquire+0x10/0x10 [ 40.875874] ? __pfx_mmap_region+0x10/0x10 [ 40.876490] ? security_mmap_addr+0x7d/0xa0 [ 40.877100] ? get_unmapped_area+0x1f5/0x3f0 [ 40.877743] do_mmap+0x854/0xf00 [ 40.878258] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.878841] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.879501] ksys_mmap_pgoff+0x3af/0x500 [ 40.880089] do_syscall_64+0x3f/0x90 [ 40.880639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.881381] RIP: 0033:0x7f81c23a9d82 [ 40.881914] 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 [ 40.884361] RSP: 002b:00007ffc97d59218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.885409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81c23a9d82 [ 40.886407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81c17e3000 [ 40.887388] RBP: 00007f81c17e3000 R08: 0000000000000009 R09: 0000000000001000 [ 40.888348] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a39c443f70 [ 40.889319] R13: 00007ffc97d59230 R14: 00007ffc97d59260 R15: 00007ffc97d595c0 [ 40.890310] [ 40.890642] [ 40.890886] Allocated by task 213: [ 40.891385] kasan_save_stack+0x22/0x50 [ 40.891955] kasan_set_track+0x25/0x30 [ 40.892516] __kasan_slab_alloc+0x59/0x70 [ 40.893114] kmem_cache_alloc+0x16b/0x370 [ 40.893698] vm_area_dup+0x20/0x160 [ 40.894226] __split_vma+0x170/0x950 [ 40.894763] split_vma+0xc6/0x110 [ 40.895262] mprotect_fixup+0x8d2/0xb30 [ 40.895832] do_mprotect_pkey+0x87e/0xd40 [ 40.896426] __x64_sys_mprotect+0x78/0xc0 [ 40.897010] do_syscall_64+0x3f/0x90 [ 40.897549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.898302] [ 40.898549] Freed by task 204: [ 40.899004] kasan_save_stack+0x22/0x50 [ 40.899577] kasan_set_track+0x25/0x30 [ 40.900143] kasan_save_free_info+0x2b/0x50 [ 40.900748] __kasan_slab_free+0x10a/0x190 [ 40.901357] kmem_cache_free+0x10d/0x4d0 [ 40.901950] rcu_core+0x8c8/0x2860 [ 40.902456] __do_softirq+0x1b7/0x7d4 [ 40.903006] [ 40.903253] Last potentially related work creation: [ 40.903922] kasan_save_stack+0x22/0x50 [ 40.904497] __kasan_record_aux_stack+0x8e/0xa0 [ 40.905167] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.905915] remove_vma+0x139/0x170 [ 40.906437] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.907078] do_vmi_munmap+0x1f1/0x2b0 [ 40.907633] __vm_munmap+0x138/0x3a0 [ 40.908164] __x64_sys_munmap+0x59/0x80 [ 40.908730] do_syscall_64+0x3f/0x90 [ 40.909265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.909990] [ 40.910233] Second to last potentially related work creation: [ 40.911003] kasan_save_stack+0x22/0x50 [ 40.911578] __kasan_record_aux_stack+0x8e/0xa0 [ 40.912225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.912953] remove_vma+0x139/0x170 [ 40.913459] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.914100] do_vmi_munmap+0x1f1/0x2b0 [ 40.914648] mmap_region+0x1f9/0x2660 [ 40.915183] do_mmap+0x854/0xf00 [ 40.915670] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.916223] ksys_mmap_pgoff+0x3af/0x500 [ 40.916789] do_syscall_64+0x3f/0x90 [ 40.917318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.918052] [ 40.918295] The buggy address belongs to the object at ffff88800e184ae0 [ 40.918295] which belongs to the cache vm_area_struct of size 168 [ 40.919944] The buggy address is located 88 bytes inside of [ 40.919944] freed 168-byte region [ffff88800e184ae0, ffff88800e184b88) [ 40.921534] [ 40.921787] The buggy address belongs to the physical page: [ 40.922545] page:000000008a35c384 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe184 [ 40.923772] memcg:ffff88800dfe7601 [ 40.924259] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.924982] page_type: 0xffffffff() [ 40.925494] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.926555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfe7601 [ 40.927585] page dumped because: kasan: bad access detected [ 40.928327] [ 40.928569] Memory state around the buggy address: [ 40.929221] ffff88800e184a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.930187] ffff88800e184a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 40.931137] >ffff88800e184b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.932085] ^ [ 40.932765] ffff88800e184b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 40.933716] ffff88800e184c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 40.934688] ================================================================== [ 40.936381] Disabling lock debugging due to kernel taint [ 42.897627] BUG: Bad rss-counter state mm:000000004fd546fc type:MM_FILEPAGES val:33 [ 42.898638] BUG: Bad rss-counter state mm:000000004fd546fc type:MM_ANONPAGES val:22 [ 43.429475] BUG: Bad rss-counter state mm:00000000adf98f53 type:MM_FILEPAGES val:33 [ 43.430628] BUG: Bad rss-counter state mm:00000000adf98f53 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39715' (ECDSA) to the list of known hosts. 2023/06/20 06:59:58 fuzzer started 2023/06/20 06:59:59 dialing manager at localhost:44161 2023/06/20 06:59:59 checking machine... 2023/06/20 06:59:59 checking revisions... [ 44.076769] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:59:59 testing simple program... [ 44.129208] cgroup: Unknown subsys name 'net' [ 44.171857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000025 RCX=ffffffff8372634d RDX=ffff88801589b680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000026 RSP=ffff88801627f7b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96c08 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c01fc 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 00007f3dd19b3900 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=00007ffdcc49d000 CR3=000000000e4ca000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fc2148d3048 CR3=000000000eada000 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=2038353a39353a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a39353a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000