syzkaller login: [ 28.744909] BUG: Bad rss-counter state mm:000000001d82adf7 type:MM_FILEPAGES val:33 [ 28.745686] BUG: Bad rss-counter state mm:000000001d82adf7 type:MM_ANONPAGES val:22 [ 28.860791] ================================================================== [ 28.861468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.862172] Read of size 8 at addr ffff88801a166880 by task sshd/220 [ 28.862761] [ 28.862927] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.863676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.864417] Call Trace: [ 28.864659] [ 28.864873] dump_stack_lvl+0x91/0xf0 [ 28.865243] print_report+0xcc/0x620 [ 28.865628] ? __virt_addr_valid+0x102/0x340 [ 28.866044] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866527] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866906] kasan_report+0xbe/0xf0 [ 28.867196] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.867569] vma_interval_tree_remove+0xc75/0xec0 [ 28.867925] vma_prepare+0xc54/0x11a0 [ 28.868211] __split_vma+0x5af/0x950 [ 28.868494] ? __pfx___split_vma+0x10/0x10 [ 28.868811] ? find_held_lock+0x2c/0x110 [ 28.869123] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.869463] ? lock_is_held_type+0x9f/0x120 [ 28.869792] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.870157] ? mtree_range_walk+0x632/0x900 [ 28.870495] ? mas_walk+0x5c7/0x7c0 [ 28.870792] do_vmi_munmap+0x1f1/0x2b0 [ 28.871097] mmap_region+0x1f9/0x2660 [ 28.871398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.871716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.872179] ? __pfx_lock_acquire+0x10/0x10 [ 28.872525] ? __pfx_mmap_region+0x10/0x10 [ 28.872864] ? security_mmap_addr+0x7d/0xa0 [ 28.873210] ? get_unmapped_area+0x1f5/0x3f0 [ 28.873558] do_mmap+0x854/0xf00 [ 28.873842] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.874149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.874513] ksys_mmap_pgoff+0x3af/0x500 [ 28.874830] do_syscall_64+0x3f/0x90 [ 28.875141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.875560] RIP: 0033:0x7fada208cd82 [ 28.875854] 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 [ 28.877229] RSP: 002b:00007ffcadacfaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.877801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fada208cd82 [ 28.878342] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fada14c6000 [ 28.878898] RBP: 00007fada14c6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.879435] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564e8cbf980 [ 28.879973] R13: 00007ffcadacfac0 R14: 00007ffcadacfaf0 R15: 00007ffcadacfe50 [ 28.880517] [ 28.880706] [ 28.880841] Allocated by task 213: [ 28.881119] kasan_save_stack+0x22/0x50 [ 28.881439] kasan_set_track+0x25/0x30 [ 28.881756] __kasan_slab_alloc+0x59/0x70 [ 28.882091] kmem_cache_alloc+0x16b/0x370 [ 28.882428] vm_area_dup+0x20/0x160 [ 28.882716] __split_vma+0x170/0x950 [ 28.883016] split_vma+0xc6/0x110 [ 28.883301] mprotect_fixup+0x8d2/0xb30 [ 28.883622] do_mprotect_pkey+0x87e/0xd40 [ 28.883948] __x64_sys_mprotect+0x78/0xc0 [ 28.884276] do_syscall_64+0x3f/0x90 [ 28.884575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.884985] [ 28.885124] Freed by task 13: [ 28.885372] kasan_save_stack+0x22/0x50 [ 28.885693] kasan_set_track+0x25/0x30 [ 28.886005] kasan_save_free_info+0x2b/0x50 [ 28.886351] __kasan_slab_free+0x10a/0x190 [ 28.886700] kmem_cache_free+0x10d/0x4d0 [ 28.887019] rcu_core+0x8c8/0x2860 [ 28.887299] __do_softirq+0x1b7/0x7d4 [ 28.887596] [ 28.887730] Last potentially related work creation: [ 28.888097] kasan_save_stack+0x22/0x50 [ 28.888413] __kasan_record_aux_stack+0x8e/0xa0 [ 28.888772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.889178] remove_vma+0x139/0x170 [ 28.889464] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.889815] do_vmi_munmap+0x1f1/0x2b0 [ 28.890115] __vm_munmap+0x138/0x3a0 [ 28.890413] __x64_sys_munmap+0x59/0x80 [ 28.890720] do_syscall_64+0x3f/0x90 [ 28.891021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.891423] [ 28.891562] The buggy address belongs to the object at ffff88801a166828 [ 28.891562] which belongs to the cache vm_area_struct of size 168 [ 28.892510] The buggy address is located 88 bytes inside of [ 28.892510] freed 168-byte region [ffff88801a166828, ffff88801a1668d0) [ 28.893403] [ 28.893536] The buggy address belongs to the physical page: [ 28.893957] page:00000000efe6f1f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a166 [ 28.894661] memcg:ffff888009727001 [ 28.894927] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.895325] page_type: 0xffffffff() [ 28.895606] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.896197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009727001 [ 28.896780] page dumped because: kasan: bad access detected [ 28.897195] [ 28.897329] Memory state around the buggy address: [ 28.897696] ffff88801a166780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.898240] ffff88801a166800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.898800] >ffff88801a166880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.899344] ^ [ 28.899603] ffff88801a166900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.900138] ffff88801a166980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.900672] ================================================================== [ 28.901285] Disabling lock debugging due to kernel taint [ 31.028555] BUG: Bad rss-counter state mm:00000000a167d84b type:MM_FILEPAGES val:33 [ 31.029318] BUG: Bad rss-counter state mm:00000000a167d84b type:MM_ANONPAGES val:22 [ 31.494694] BUG: Bad rss-counter state mm:0000000026714d28 type:MM_FILEPAGES val:33 [ 31.495786] BUG: Bad rss-counter state mm:0000000026714d28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57678' (ECDSA) to the list of known hosts. 2023/06/21 04:39:26 fuzzer started 2023/06/21 04:39:26 dialing manager at localhost:36067 2023/06/21 04:39:26 checking machine... 2023/06/21 04:39:26 checking revisions... [ 32.207704] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:39:26 testing simple program... [ 32.256918] cgroup: Unknown subsys name 'net' [ 32.305332] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:39:26 Registers: info registers vcpu 0 RAX=0000000000000012 RBX=0000000000000002 RCX=ffffffff8451105d RDX=0000000000000012 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffffffff8604f5d8 RSP=ffff88806ce099e0 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f61c R13=ffffffff8604f5d8 R14=ffffffff8604f5d8 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000293 [--S-A-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 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=0000556f17c4e050 CR3=0000000019de0000 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=2035323a39333a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a39333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000556f17c4d450 RCX=0000000000000400 RDX=0000000000000400 RSI=0000556f17c4d450 RDI=0000556f17c54d00 RBP=0000556f17c4d450 RSP=00007fff2b5d3f80 R8 =00007f5a7c3826f8 R9 =00007f5a7c37815e R10=0000000000000000 R11=0000000000000287 R12=0000000000000400 R13=00007f5a7c3826f8 R14=0000000000000000 R15=0000556f17c54d00 RIP=00007f5a7c7f4ff9 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5a7c382900 00000000 00000000 GS =0000 0000000000000000 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=00007f5a7c93a0b0 CR3=0000000017e40000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000