syzkaller login: [ 67.383992] BUG: Bad rss-counter state mm:0000000073bb61fb type:MM_FILEPAGES val:33 [ 67.385575] BUG: Bad rss-counter state mm:0000000073bb61fb type:MM_ANONPAGES val:22 [ 67.549756] ================================================================== [ 67.550653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.551583] Read of size 8 at addr ffff888018ce7140 by task sshd/222 [ 67.552347] [ 67.552562] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.553494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.554473] Call Trace: [ 67.554792] [ 67.555086] dump_stack_lvl+0x91/0xf0 [ 67.555573] print_report+0xcc/0x620 [ 67.556050] ? __virt_addr_valid+0x102/0x340 [ 67.556593] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.557202] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.557812] kasan_report+0xbe/0xf0 [ 67.558306] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.558922] vma_interval_tree_remove+0xc75/0xec0 [ 67.559528] vma_prepare+0xc54/0x11a0 [ 67.560009] __split_vma+0x5af/0x950 [ 67.560482] ? __pfx___split_vma+0x10/0x10 [ 67.561014] ? find_held_lock+0x2c/0x110 [ 67.561534] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.562101] ? lock_is_held_type+0x9f/0x120 [ 67.562647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.563250] ? mtree_range_walk+0x632/0x900 [ 67.563800] ? mas_walk+0x5c7/0x7c0 [ 67.564270] do_vmi_munmap+0x1f1/0x2b0 [ 67.564765] mmap_region+0x1f9/0x2660 [ 67.565248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.565762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.566518] ? __pfx_lock_acquire+0x10/0x10 [ 67.567069] ? __pfx_mmap_region+0x10/0x10 [ 67.567614] ? security_mmap_addr+0x7d/0xa0 [ 67.568156] ? get_unmapped_area+0x1f5/0x3f0 [ 67.568703] do_mmap+0x854/0xf00 [ 67.569143] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.569634] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.570214] ksys_mmap_pgoff+0x3af/0x500 [ 67.570727] do_syscall_64+0x3f/0x90 [ 67.571208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.571863] RIP: 0033:0x7f4613749d82 [ 67.572316] 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 [ 67.574448] RSP: 002b:00007ffd42a25c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.575368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4613749d82 [ 67.576233] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4612b83000 [ 67.577089] RBP: 00007f4612b83000 R08: 0000000000000009 R09: 0000000000001000 [ 67.577941] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4e4733f70 [ 67.578792] R13: 00007ffd42a25c70 R14: 00007ffd42a25ca0 R15: 00007ffd42a26000 [ 67.579659] [ 67.579954] [ 67.580170] Allocated by task 215: [ 67.580600] kasan_save_stack+0x22/0x50 [ 67.581147] kasan_set_track+0x25/0x30 [ 67.581635] __kasan_slab_alloc+0x59/0x70 [ 67.582168] kmem_cache_alloc+0x16b/0x370 [ 67.582720] vm_area_dup+0x20/0x160 [ 67.583183] __split_vma+0x170/0x950 [ 67.583674] split_vma+0xc6/0x110 [ 67.584130] mprotect_fixup+0x8d2/0xb30 [ 67.584629] do_mprotect_pkey+0x87e/0xd40 [ 67.585154] __x64_sys_mprotect+0x78/0xc0 [ 67.585684] do_syscall_64+0x3f/0x90 [ 67.586182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.586800] [ 67.587006] Freed by task 215: [ 67.587376] kasan_save_stack+0x22/0x50 [ 67.587879] kasan_set_track+0x25/0x30 [ 67.588391] kasan_save_free_info+0x2b/0x50 [ 67.588928] __kasan_slab_free+0x10a/0x190 [ 67.589455] kmem_cache_free+0x10d/0x4d0 [ 67.589968] rcu_core+0x8c8/0x2860 [ 67.590423] __do_softirq+0x1b7/0x7d4 [ 67.590906] [ 67.591122] Last potentially related work creation: [ 67.591738] kasan_save_stack+0x22/0x50 [ 67.592250] __kasan_record_aux_stack+0x8e/0xa0 [ 67.592831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.593492] remove_vma+0x139/0x170 [ 67.593962] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.594555] do_vmi_munmap+0x1f1/0x2b0 [ 67.595061] __vm_munmap+0x138/0x3a0 [ 67.595548] __x64_sys_munmap+0x59/0x80 [ 67.596064] do_syscall_64+0x3f/0x90 [ 67.596564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.597221] [ 67.597440] Second to last potentially related work creation: [ 67.598129] kasan_save_stack+0x22/0x50 [ 67.598639] __kasan_record_aux_stack+0x8e/0xa0 [ 67.599223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.599907] remove_vma+0x139/0x170 [ 67.600363] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.600938] do_vmi_munmap+0x1f1/0x2b0 [ 67.601432] mmap_region+0x1f9/0x2660 [ 67.601915] do_mmap+0x854/0xf00 [ 67.602346] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.602812] ksys_mmap_pgoff+0x7d/0x500 [ 67.603282] do_syscall_64+0x3f/0x90 [ 67.603733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.604388] [ 67.604598] The buggy address belongs to the object at ffff888018ce70e8 [ 67.604598] which belongs to the cache vm_area_struct of size 168 [ 67.606057] The buggy address is located 88 bytes inside of [ 67.606057] freed 168-byte region [ffff888018ce70e8, ffff888018ce7190) [ 67.607510] [ 67.607726] The buggy address belongs to the physical page: [ 67.608410] page:00000000a74f8ec4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ce7 [ 67.609434] memcg:ffff88800f24e801 [ 67.609837] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.610474] page_type: 0xffffffff() [ 67.610912] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 67.611837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f24e801 [ 67.612748] page dumped because: kasan: bad access detected [ 67.613410] [ 67.613630] Memory state around the buggy address: [ 67.614189] ffff888018ce7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.615068] ffff888018ce7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 67.615872] >ffff888018ce7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.616676] ^ [ 67.617310] ffff888018ce7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 67.618168] ffff888018ce7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 67.619047] ================================================================== [ 67.620015] Disabling lock debugging due to kernel taint [ 69.912906] BUG: Bad rss-counter state mm:000000000f5c0e46 type:MM_FILEPAGES val:33 [ 69.914126] BUG: Bad rss-counter state mm:000000000f5c0e46 type:MM_ANONPAGES val:22 [ 70.337960] BUG: Bad rss-counter state mm:00000000c012fa43 type:MM_FILEPAGES val:33 [ 70.339247] BUG: Bad rss-counter state mm:00000000c012fa43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2742' (ECDSA) to the list of known hosts. 2023/06/19 13:31:21 fuzzer started 2023/06/19 13:31:21 dialing manager at localhost:44161 2023/06/19 13:31:21 checking machine... 2023/06/19 13:31:21 checking revisions... [ 71.073758] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:31:21 testing simple program... [ 71.125536] cgroup: Unknown subsys name 'net' [ 71.172636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:31:15 Registers: info registers vcpu 0 RAX=ffff8880118279f8 RBX=ffff8880118279e8 RCX=ffffffff812e00e5 RDX=dffffc0000000000 RSI=ffff88800e366bd0 RDI=ffff888011827a18 RBP=ffff8880118279f8 RSP=ffff88800ef37c68 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e366a00 R13=0000000000000000 R14=ffff88801bcd5178 R15=ffff88801bcd5130 RIP=ffffffff8184753a RFL=00000002 [-------] 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 00007f3ff0c90900 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=00007f3ff12480b0 CR3=000000000d828000 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=31333a3331203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e136d RSI=ffffffff81c61c84 RDI=ffff88806cf09b68 RBP=0000000000000011 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020c48 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015829b40 R15=ffff888017c66c60 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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 00007fb7c9a3a700 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=00007f9511e7fb40 CR3=0000000009e9e000 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=2030323a31333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a31333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000