syzkaller login: [ 30.489511] BUG: Bad rss-counter state mm:00000000a9e4aea6 type:MM_FILEPAGES val:33 [ 30.490468] BUG: Bad rss-counter state mm:00000000a9e4aea6 type:MM_ANONPAGES val:22 [ 30.654073] ================================================================== [ 30.655122] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.656247] Read of size 8 at addr ffff88800ff71798 by task sshd/220 [ 30.657080] [ 30.657303] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.658156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.659121] Call Trace: [ 30.659443] [ 30.659739] dump_stack_lvl+0x91/0xf0 [ 30.660222] print_report+0xcc/0x620 [ 30.660707] ? __virt_addr_valid+0x102/0x340 [ 30.661259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.661862] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.662465] kasan_report+0xbe/0xf0 [ 30.662937] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663547] vma_interval_tree_remove+0xc75/0xec0 [ 30.664152] vma_prepare+0xc54/0x11a0 [ 30.664627] __split_vma+0x5af/0x950 [ 30.665090] ? __pfx___split_vma+0x10/0x10 [ 30.665619] ? find_held_lock+0x2c/0x110 [ 30.666131] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.666686] ? lock_is_held_type+0x9f/0x120 [ 30.667213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.667834] ? mtree_range_walk+0x632/0x900 [ 30.668373] ? mas_walk+0x5c7/0x7c0 [ 30.668842] do_vmi_munmap+0x1f1/0x2b0 [ 30.669324] mmap_region+0x1f9/0x2660 [ 30.669803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.670304] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.671009] ? __pfx_lock_acquire+0x10/0x10 [ 30.671541] ? __pfx_mmap_region+0x10/0x10 [ 30.672071] ? security_mmap_addr+0x7d/0xa0 [ 30.672596] ? get_unmapped_area+0x1f5/0x3f0 [ 30.673134] do_mmap+0x854/0xf00 [ 30.673572] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.674060] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.674617] ksys_mmap_pgoff+0x3af/0x500 [ 30.675114] do_syscall_64+0x3f/0x90 [ 30.675587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676233] RIP: 0033:0x7fcd4336fd82 [ 30.676691] 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 [ 30.678765] RSP: 002b:00007fffe64edb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.679650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd4336fd82 [ 30.680506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd427a9000 [ 30.681336] RBP: 00007fcd427a9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.682169] R10: 0000000000000812 R11: 0000000000000206 R12: 000056450d793b20 [ 30.682998] R13: 00007fffe64edb60 R14: 00007fffe64edb90 R15: 00007fffe64edef0 [ 30.683853] [ 30.684142] [ 30.684359] Allocated by task 213: [ 30.684787] kasan_save_stack+0x22/0x50 [ 30.685306] kasan_set_track+0x25/0x30 [ 30.685803] __kasan_slab_alloc+0x59/0x70 [ 30.686330] kmem_cache_alloc+0x16b/0x370 [ 30.686847] vm_area_dup+0x20/0x160 [ 30.687299] __split_vma+0x170/0x950 [ 30.687786] split_vma+0xc6/0x110 [ 30.688232] mprotect_fixup+0x8d2/0xb30 [ 30.688735] do_mprotect_pkey+0x87e/0xd40 [ 30.689256] __x64_sys_mprotect+0x78/0xc0 [ 30.689788] do_syscall_64+0x3f/0x90 [ 30.690253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.690894] [ 30.691111] Freed by task 203: [ 30.691502] kasan_save_stack+0x22/0x50 [ 30.692017] kasan_set_track+0x25/0x30 [ 30.692515] kasan_save_free_info+0x2b/0x50 [ 30.693044] __kasan_slab_free+0x10a/0x190 [ 30.693572] kmem_cache_free+0x10d/0x4d0 [ 30.694083] rcu_core+0x8c8/0x2860 [ 30.694522] __do_softirq+0x1b7/0x7d4 [ 30.695011] [ 30.695227] Last potentially related work creation: [ 30.695818] kasan_save_stack+0x22/0x50 [ 30.696319] __kasan_record_aux_stack+0x8e/0xa0 [ 30.696885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.697529] remove_vma+0x139/0x170 [ 30.697981] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.698535] do_vmi_munmap+0x1f1/0x2b0 [ 30.699016] __vm_munmap+0x138/0x3a0 [ 30.699476] __x64_sys_munmap+0x59/0x80 [ 30.699989] do_syscall_64+0x3f/0x90 [ 30.700464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.701096] [ 30.701308] The buggy address belongs to the object at ffff88800ff71740 [ 30.701308] which belongs to the cache vm_area_struct of size 168 [ 30.702775] The buggy address is located 88 bytes inside of [ 30.702775] freed 168-byte region [ffff88800ff71740, ffff88800ff717e8) [ 30.704183] [ 30.704402] The buggy address belongs to the physical page: [ 30.705075] page:00000000656ece6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff71 [ 30.706164] memcg:ffff88800c9a9301 [ 30.706589] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.707243] page_type: 0xffffffff() [ 30.707713] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.708637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9a9301 [ 30.709535] page dumped because: kasan: bad access detected [ 30.710188] [ 30.710411] Memory state around the buggy address: [ 30.710983] ffff88800ff71680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.711858] ffff88800ff71700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.712711] >ffff88800ff71780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.713547] ^ [ 30.714035] ffff88800ff71800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.714890] ffff88800ff71880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.715736] ================================================================== [ 30.716822] Disabling lock debugging due to kernel taint [ 32.598630] BUG: Bad rss-counter state mm:0000000078627759 type:MM_FILEPAGES val:33 [ 32.600026] BUG: Bad rss-counter state mm:0000000078627759 type:MM_ANONPAGES val:22 [ 33.069646] BUG: Bad rss-counter state mm:000000007f0b4e91 type:MM_FILEPAGES val:33 [ 33.070611] BUG: Bad rss-counter state mm:000000007f0b4e91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63671' (ECDSA) to the list of known hosts. 2023/06/20 07:13:41 fuzzer started 2023/06/20 07:13:41 dialing manager at localhost:44161 2023/06/20 07:13:41 checking machine... 2023/06/20 07:13:41 checking revisions... [ 33.774259] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:13:41 testing simple program... [ 33.814420] cgroup: Unknown subsys name 'net' [ 33.850334] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:13:41 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800db6f0e8 RCX=ffff88800db6f0e8 RDX=0000000000110011 RSI=ffff88800db6f0e8 RDI=ffff88800879fc80 RBP=ffff88800f027de8 RSP=ffff88800f027d50 R8 =0000000080110010 R9 =0000000000000000 R10=ffffea000036dbc0 R11=000000008012000f R12=ffffea000036dbc0 R13=0000000000000000 R14=0000000000110010 R15=ffff88800879fc80 RIP=ffffffff818094f2 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 00007f8d2ad65900 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=00007f8d2ad1901c CR3=000000000eaaa000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffdff363bc8 CR3=000000000dd72000 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=2031343a33313a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000