syzkaller login: [ 31.526261] BUG: Bad rss-counter state mm:00000000d3a46b4c type:MM_FILEPAGES val:33 [ 31.527505] BUG: Bad rss-counter state mm:00000000d3a46b4c type:MM_ANONPAGES val:22 [ 31.652941] ================================================================== [ 31.653846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.654778] Read of size 8 at addr ffff88801ba4f228 by task sshd/220 [ 31.655542] [ 31.655893] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.656760] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.657741] Call Trace: [ 31.658091] [ 31.658377] dump_stack_lvl+0x91/0xf0 [ 31.658864] print_report+0xcc/0x620 [ 31.659344] ? __virt_addr_valid+0x102/0x340 [ 31.659922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.660538] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.661155] kasan_report+0xbe/0xf0 [ 31.661629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.662248] vma_interval_tree_remove+0xc75/0xec0 [ 31.662872] vma_prepare+0xc54/0x11a0 [ 31.663370] __split_vma+0x5af/0x950 [ 31.663871] ? __pfx___split_vma+0x10/0x10 [ 31.664436] ? find_held_lock+0x2c/0x110 [ 31.664982] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.665567] ? lock_is_held_type+0x9f/0x120 [ 31.666133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.666766] ? mtree_range_walk+0x632/0x900 [ 31.667338] ? mas_walk+0x5c7/0x7c0 [ 31.667830] do_vmi_munmap+0x1f1/0x2b0 [ 31.668352] mmap_region+0x1f9/0x2660 [ 31.668852] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.669384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.670129] ? __pfx_lock_acquire+0x10/0x10 [ 31.670691] ? __pfx_mmap_region+0x10/0x10 [ 31.671250] ? security_mmap_addr+0x7d/0xa0 [ 31.671800] ? get_unmapped_area+0x1f5/0x3f0 [ 31.672395] do_mmap+0x854/0xf00 [ 31.672848] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.673359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.673951] ksys_mmap_pgoff+0x3af/0x500 [ 31.674484] do_syscall_64+0x3f/0x90 [ 31.674984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.675659] RIP: 0033:0x7fd084bdbd82 [ 31.676151] 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 [ 31.678384] RSP: 002b:00007ffe86b85c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.679338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd084bdbd82 [ 31.680234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd084015000 [ 31.681123] RBP: 00007fd084015000 R08: 0000000000000009 R09: 0000000000001000 [ 31.682013] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4528c3ec0 [ 31.682905] R13: 00007ffe86b85cb0 R14: 00007ffe86b85ce0 R15: 00007ffe86b86040 [ 31.683800] [ 31.684124] [ 31.684345] Allocated by task 213: [ 31.684795] kasan_save_stack+0x22/0x50 [ 31.685321] kasan_set_track+0x25/0x30 [ 31.685834] __kasan_slab_alloc+0x59/0x70 [ 31.686375] kmem_cache_alloc+0x16b/0x370 [ 31.686913] vm_area_dup+0x20/0x160 [ 31.687381] __split_vma+0x170/0x950 [ 31.687871] split_vma+0xc6/0x110 [ 31.688333] mprotect_fixup+0x8d2/0xb30 [ 31.688851] do_mprotect_pkey+0x87e/0xd40 [ 31.689385] __x64_sys_mprotect+0x78/0xc0 [ 31.689934] do_syscall_64+0x3f/0x90 [ 31.690425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.691089] [ 31.691312] Freed by task 213: [ 31.691717] kasan_save_stack+0x22/0x50 [ 31.692262] kasan_set_track+0x25/0x30 [ 31.692771] kasan_save_free_info+0x2b/0x50 [ 31.693329] __kasan_slab_free+0x10a/0x190 [ 31.693887] kmem_cache_free+0x10d/0x4d0 [ 31.694419] rcu_core+0x8c8/0x2860 [ 31.694887] __do_softirq+0x1b7/0x7d4 [ 31.695382] [ 31.695606] Last potentially related work creation: [ 31.696213] kasan_save_stack+0x22/0x50 [ 31.696782] __kasan_record_aux_stack+0x8e/0xa0 [ 31.697382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.698050] remove_vma+0x139/0x170 [ 31.698519] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.699102] do_vmi_munmap+0x1f1/0x2b0 [ 31.699603] __vm_munmap+0x138/0x3a0 [ 31.700100] __x64_sys_munmap+0x59/0x80 [ 31.700616] do_syscall_64+0x3f/0x90 [ 31.701111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.701779] [ 31.702000] The buggy address belongs to the object at ffff88801ba4f1d0 [ 31.702000] which belongs to the cache vm_area_struct of size 168 [ 31.703535] The buggy address is located 88 bytes inside of [ 31.703535] freed 168-byte region [ffff88801ba4f1d0, ffff88801ba4f278) [ 31.705029] [ 31.705258] The buggy address belongs to the physical page: [ 31.705941] page:00000000d39cfa23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ba4f [ 31.707081] memcg:ffff888009772f01 [ 31.707531] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.708218] page_type: 0xffffffff() [ 31.708681] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.709638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009772f01 [ 31.710589] page dumped because: kasan: bad access detected [ 31.711270] [ 31.711496] Memory state around the buggy address: [ 31.712109] ffff88801ba4f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.713005] ffff88801ba4f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.713895] >ffff88801ba4f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.714792] ^ [ 31.715398] ffff88801ba4f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.716303] ffff88801ba4f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.717196] ================================================================== [ 31.718385] Disabling lock debugging due to kernel taint [ 33.373272] BUG: Bad rss-counter state mm:00000000975a4e72 type:MM_FILEPAGES val:33 [ 33.374020] BUG: Bad rss-counter state mm:00000000975a4e72 type:MM_ANONPAGES val:22 [ 33.808357] BUG: Bad rss-counter state mm:00000000dbb77d32 type:MM_FILEPAGES val:33 [ 33.809359] BUG: Bad rss-counter state mm:00000000dbb77d32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53764' (ECDSA) to the list of known hosts. 2023/06/21 06:49:30 fuzzer started 2023/06/21 06:49:31 dialing manager at localhost:36067 2023/06/21 06:49:31 checking machine... 2023/06/21 06:49:31 checking revisions... [ 34.543768] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:49:31 testing simple program... [ 34.601368] cgroup: Unknown subsys name 'net' [ 34.643303] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:49:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000043 RCX=0000000000000000 RDX=ffff888017feb680 RSI=0000000000000044 RDI=0000000000000082 RBP=0000000000000044 RSP=ffff888016b277b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99cf8 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0400 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 00007f626982a900 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=00007f6269de1618 CR3=000000001bbd2000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f7bbc88e920 CR3=000000000c646000 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=c071bcbca87a6b9d114e9a7c82eb459c XMM02=ec2efd57dc4c00df000000000011ac00 XMM03=50a71a2f26be7713000000000011acd0 XMM04=bdcd5ca76ea384a100000000000ae988 XMM05=19e9129bd510f2350000000000131f98 XMM06=c1590ab14f5c72050000000000130e00 XMM07=e042d86d42eb936e00000000001223b0 XMM08=50a71a2f26be7713000000000011acd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000