syzkaller login: [ 38.653215] BUG: Bad rss-counter state mm:00000000371600fd type:MM_FILEPAGES val:33 [ 38.653849] BUG: Bad rss-counter state mm:00000000371600fd type:MM_ANONPAGES val:22 [ 38.777348] ================================================================== [ 38.778361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.779358] Read of size 8 at addr ffff888009574228 by task sshd/218 [ 38.780216] [ 38.780450] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.781381] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.782405] Call Trace: [ 38.782743] [ 38.783048] dump_stack_lvl+0x91/0xf0 [ 38.783576] print_report+0xcc/0x620 [ 38.784098] ? __virt_addr_valid+0x102/0x340 [ 38.784695] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.785353] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.786009] kasan_report+0xbe/0xf0 [ 38.786514] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.787180] vma_interval_tree_remove+0xc75/0xec0 [ 38.787832] vma_prepare+0xc54/0x11a0 [ 38.788346] __split_vma+0x5af/0x950 [ 38.788875] ? __pfx___split_vma+0x10/0x10 [ 38.789447] ? find_held_lock+0x2c/0x110 [ 38.790018] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.790621] ? lock_is_held_type+0x9f/0x120 [ 38.791205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.791858] ? mtree_range_walk+0x632/0x900 [ 38.792464] ? mas_walk+0x5c7/0x7c0 [ 38.792986] do_vmi_munmap+0x1f1/0x2b0 [ 38.793516] mmap_region+0x1f9/0x2660 [ 38.794029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.794587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.795352] ? __pfx_lock_acquire+0x10/0x10 [ 38.795914] ? __pfx_mmap_region+0x10/0x10 [ 38.796477] ? security_mmap_addr+0x7d/0xa0 [ 38.797055] ? get_unmapped_area+0x1f5/0x3f0 [ 38.797644] do_mmap+0x854/0xf00 [ 38.798115] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.798649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.799253] ksys_mmap_pgoff+0x3af/0x500 [ 38.799799] do_syscall_64+0x3f/0x90 [ 38.800320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.801034] RIP: 0033:0x7fdbcff9cd82 [ 38.801525] 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 [ 38.803803] RSP: 002b:00007ffcb6ba6be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.804805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbcff9cd82 [ 38.805708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbcf3d6000 [ 38.806613] RBP: 00007fdbcf3d6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.807513] R10: 0000000000000812 R11: 0000000000000206 R12: 000055740f54af60 [ 38.808414] R13: 00007ffcb6ba6c00 R14: 00007ffcb6ba6c30 R15: 00007ffcb6ba6f90 [ 38.809342] [ 38.809652] [ 38.809887] Allocated by task 211: [ 38.810346] kasan_save_stack+0x22/0x50 [ 38.810897] kasan_set_track+0x25/0x30 [ 38.811436] __kasan_slab_alloc+0x59/0x70 [ 38.812004] kmem_cache_alloc+0x16b/0x370 [ 38.812562] vm_area_dup+0x20/0x160 [ 38.813067] __split_vma+0x170/0x950 [ 38.813571] split_vma+0xc6/0x110 [ 38.814045] mprotect_fixup+0x8d2/0xb30 [ 38.814589] do_mprotect_pkey+0x87e/0xd40 [ 38.815148] __x64_sys_mprotect+0x78/0xc0 [ 38.815705] do_syscall_64+0x3f/0x90 [ 38.816213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.816908] [ 38.817141] Freed by task 211: [ 38.817560] kasan_save_stack+0x22/0x50 [ 38.818098] kasan_set_track+0x25/0x30 [ 38.818625] kasan_save_free_info+0x2b/0x50 [ 38.819192] __kasan_slab_free+0x10a/0x190 [ 38.819760] kmem_cache_free+0x10d/0x4d0 [ 38.820314] rcu_core+0x8c8/0x2860 [ 38.820790] __do_softirq+0x1b7/0x7d4 [ 38.821299] [ 38.821529] Last potentially related work creation: [ 38.822156] kasan_save_stack+0x22/0x50 [ 38.822691] __kasan_record_aux_stack+0x8e/0xa0 [ 38.823305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.823988] remove_vma+0x139/0x170 [ 38.824469] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.825089] do_vmi_munmap+0x1f1/0x2b0 [ 38.825612] __vm_munmap+0x138/0x3a0 [ 38.826105] __x64_sys_munmap+0x59/0x80 [ 38.826641] do_syscall_64+0x3f/0x90 [ 38.827148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.827842] [ 38.828074] Second to last potentially related work creation: [ 38.828811] kasan_save_stack+0x22/0x50 [ 38.829347] __kasan_record_aux_stack+0x8e/0xa0 [ 38.829954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.830639] remove_vma+0x139/0x170 [ 38.831120] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.831715] do_vmi_munmap+0x1f1/0x2b0 [ 38.832233] mmap_region+0x1f9/0x2660 [ 38.832763] do_mmap+0x854/0xf00 [ 38.833226] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.833751] ksys_mmap_pgoff+0x7d/0x500 [ 38.834292] do_syscall_64+0x3f/0x90 [ 38.834800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.835500] [ 38.835730] The buggy address belongs to the object at ffff8880095741d0 [ 38.835730] which belongs to the cache vm_area_struct of size 168 [ 38.837312] The buggy address is located 88 bytes inside of [ 38.837312] freed 168-byte region [ffff8880095741d0, ffff888009574278) [ 38.838822] [ 38.839052] The buggy address belongs to the physical page: [ 38.839756] page:000000006ce1e3e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9574 [ 38.840914] memcg:ffff88800d247601 [ 38.841373] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.842059] page_type: 0xffffffff() [ 38.842544] raw: 0100000000000200 ffff8880087a0c80 ffffea0000255580 dead000000000002 [ 38.843524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d247601 [ 38.844502] page dumped because: kasan: bad access detected [ 38.845225] [ 38.845455] Memory state around the buggy address: [ 38.846087] ffff888009574100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.847002] ffff888009574180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.847922] >ffff888009574200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.848853] ^ [ 38.849453] ffff888009574280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.850378] ffff888009574300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.851315] ================================================================== [ 38.852426] Disabling lock debugging due to kernel taint [ 40.712497] BUG: Bad rss-counter state mm:0000000000379788 type:MM_FILEPAGES val:33 [ 40.713491] BUG: Bad rss-counter state mm:0000000000379788 type:MM_ANONPAGES val:22 [ 41.199498] BUG: Bad rss-counter state mm:000000005d42aa30 type:MM_FILEPAGES val:33 [ 41.200487] BUG: Bad rss-counter state mm:000000005d42aa30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3791' (ECDSA) to the list of known hosts. 2023/06/20 12:18:33 fuzzer started 2023/06/20 12:18:33 dialing manager at localhost:36067 2023/06/20 12:18:33 checking machine... 2023/06/20 12:18:33 checking revisions... [ 41.866042] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:18:33 testing simple program... [ 41.912305] cgroup: Unknown subsys name 'net' [ 41.945328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:18:33 Registers: info registers vcpu 0 RAX=e21cd55c55f58700 RBX=1ffff11002840f27 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888014207928 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ee5 RFL=00000286 [--S--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 00007f9bda950900 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=00007f9bd9d52ad0 CR3=000000000c5b6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4a75156368cdce6800000000000ae988 XMM05=2c8302a28d6450a50000000000134330 XMM06=bdf2e299e47b49d50000000000132db0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd429685618 CR3=000000000c648000 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=2032333a38313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a38313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000