syzkaller login: [ 31.492879] BUG: Bad rss-counter state mm:00000000007158e3 type:MM_FILEPAGES val:33 [ 31.494887] BUG: Bad rss-counter state mm:00000000007158e3 type:MM_ANONPAGES val:22 [ 31.650393] ================================================================== [ 31.651478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.652443] Read of size 8 at addr ffff88800e4d8140 by task sshd/221 [ 31.653297] [ 31.653521] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.654379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.655363] Call Trace: [ 31.655690] [ 31.655984] dump_stack_lvl+0x91/0xf0 [ 31.656473] print_report+0xcc/0x620 [ 31.656958] ? __virt_addr_valid+0x102/0x340 [ 31.657512] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658121] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658747] kasan_report+0xbe/0xf0 [ 31.659236] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.659866] vma_interval_tree_remove+0xc75/0xec0 [ 31.660466] vma_prepare+0xc54/0x11a0 [ 31.660939] __split_vma+0x5af/0x950 [ 31.661411] ? __pfx___split_vma+0x10/0x10 [ 31.661932] ? find_held_lock+0x2c/0x110 [ 31.662460] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.663018] ? lock_is_held_type+0x9f/0x120 [ 31.663572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.664172] ? mtree_range_walk+0x632/0x900 [ 31.664726] ? mas_walk+0x5c7/0x7c0 [ 31.665202] do_vmi_munmap+0x1f1/0x2b0 [ 31.665691] mmap_region+0x1f9/0x2660 [ 31.666171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.666678] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.667386] ? __pfx_lock_acquire+0x10/0x10 [ 31.667927] ? __pfx_mmap_region+0x10/0x10 [ 31.668456] ? security_mmap_addr+0x7d/0xa0 [ 31.668996] ? get_unmapped_area+0x1f5/0x3f0 [ 31.669551] do_mmap+0x854/0xf00 [ 31.669990] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.670483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.671047] ksys_mmap_pgoff+0x3af/0x500 [ 31.671558] do_syscall_64+0x3f/0x90 [ 31.672035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.672673] RIP: 0033:0x7f9159542d82 [ 31.673124] 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 [ 31.675222] RSP: 002b:00007ffe9eccf288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.676145] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9159542d82 [ 31.676984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f915897c000 [ 31.677826] RBP: 00007f915897c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.678669] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dd13b4980 [ 31.679514] R13: 00007ffe9eccf2a0 R14: 00007ffe9eccf2d0 R15: 00007ffe9eccf630 [ 31.680363] [ 31.680652] [ 31.680865] Allocated by task 214: [ 31.681296] kasan_save_stack+0x22/0x50 [ 31.681805] kasan_set_track+0x25/0x30 [ 31.682301] __kasan_slab_alloc+0x59/0x70 [ 31.682826] kmem_cache_alloc+0x16b/0x370 [ 31.683333] vm_area_dup+0x20/0x160 [ 31.683803] __split_vma+0x170/0x950 [ 31.684270] split_vma+0xc6/0x110 [ 31.684703] mprotect_fixup+0x8d2/0xb30 [ 31.685201] do_mprotect_pkey+0x87e/0xd40 [ 31.685718] __x64_sys_mprotect+0x78/0xc0 [ 31.686242] do_syscall_64+0x3f/0x90 [ 31.686722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.687353] [ 31.687576] Freed by task 214: [ 31.687966] kasan_save_stack+0x22/0x50 [ 31.688468] kasan_set_track+0x25/0x30 [ 31.688962] kasan_save_free_info+0x2b/0x50 [ 31.689485] __kasan_slab_free+0x10a/0x190 [ 31.690019] kmem_cache_free+0x10d/0x4d0 [ 31.690526] rcu_core+0x8c8/0x2860 [ 31.690973] __do_softirq+0x1b7/0x7d4 [ 31.691462] [ 31.691681] Last potentially related work creation: [ 31.692261] kasan_save_stack+0x22/0x50 [ 31.692758] __kasan_record_aux_stack+0x8e/0xa0 [ 31.693329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.693979] remove_vma+0x139/0x170 [ 31.694438] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.695006] do_vmi_munmap+0x1f1/0x2b0 [ 31.695505] __vm_munmap+0x138/0x3a0 [ 31.695972] __x64_sys_munmap+0x59/0x80 [ 31.696469] do_syscall_64+0x3f/0x90 [ 31.696949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.697586] [ 31.697804] The buggy address belongs to the object at ffff88800e4d80e8 [ 31.697804] which belongs to the cache vm_area_struct of size 168 [ 31.699269] The buggy address is located 88 bytes inside of [ 31.699269] freed 168-byte region [ffff88800e4d80e8, ffff88800e4d8190) [ 31.700691] [ 31.700912] The buggy address belongs to the physical page: [ 31.701602] page:0000000019c65c48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4d8 [ 31.702738] memcg:ffff88800c633701 [ 31.703190] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.703887] page_type: 0xffffffff() [ 31.704361] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.705323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c633701 [ 31.706280] page dumped because: kasan: bad access detected [ 31.706968] [ 31.707194] Memory state around the buggy address: [ 31.707807] ffff88800e4d8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.708698] ffff88800e4d8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.709599] >ffff88800e4d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.710504] ^ [ 31.711186] ffff88800e4d8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.712097] ffff88800e4d8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.712996] ================================================================== [ 31.713998] Disabling lock debugging due to kernel taint [ 33.589326] BUG: Bad rss-counter state mm:00000000ae7222cd type:MM_FILEPAGES val:33 [ 33.590267] BUG: Bad rss-counter state mm:00000000ae7222cd type:MM_ANONPAGES val:22 [ 34.042940] BUG: Bad rss-counter state mm:0000000096a54f00 type:MM_FILEPAGES val:33 [ 34.044384] BUG: Bad rss-counter state mm:0000000096a54f00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42977' (ECDSA) to the list of known hosts. 2023/06/20 02:08:50 fuzzer started 2023/06/20 02:08:50 dialing manager at localhost:44161 2023/06/20 02:08:50 checking machine... 2023/06/20 02:08:50 checking revisions... [ 34.794466] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:08:50 testing simple program... [ 34.841272] cgroup: Unknown subsys name 'net' [ 34.878709] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:08:49 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=00007ffd1dcf7738 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=00007ff1ee7a751000005653ea494790 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=ffff888008c11e60 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880147951c0 RSI=ffffffff818ea340 RDI=0000000000000001 RBP=0000000000000003 RSP=ffff88800f0bfd48 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800e7b8000 R13=ffff888008c11e60 R14=ffff88800e7b8058 R15=0000000000000002 RIP=ffffffff818ea356 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 00007fec90514700 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=00007f8546263c40 CR3=000000000c7aa000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732039343a3830 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000