syzkaller login: [ 30.418007] BUG: Bad rss-counter state mm:00000000462b1b93 type:MM_FILEPAGES val:33 [ 30.419560] BUG: Bad rss-counter state mm:00000000462b1b93 type:MM_ANONPAGES val:22 [ 30.561428] ================================================================== [ 30.562434] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.563441] Read of size 8 at addr ffff88800de96228 by task sshd/220 [ 30.564413] [ 30.564649] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.565567] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.566602] Call Trace: [ 30.566970] [ 30.567277] dump_stack_lvl+0x91/0xf0 [ 30.567802] print_report+0xcc/0x620 [ 30.568321] ? __virt_addr_valid+0x102/0x340 [ 30.568911] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.569572] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.570238] kasan_report+0xbe/0xf0 [ 30.570749] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.571419] vma_interval_tree_remove+0xc75/0xec0 [ 30.572068] vma_prepare+0xc54/0x11a0 [ 30.572583] __split_vma+0x5af/0x950 [ 30.573089] ? __pfx___split_vma+0x10/0x10 [ 30.573655] ? find_held_lock+0x2c/0x110 [ 30.574221] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.574832] ? lock_is_held_type+0x9f/0x120 [ 30.575411] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.576067] ? mtree_range_walk+0x632/0x900 [ 30.576665] ? mas_walk+0x5c7/0x7c0 [ 30.577179] do_vmi_munmap+0x1f1/0x2b0 [ 30.577710] mmap_region+0x1f9/0x2660 [ 30.578227] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.578775] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.579559] ? __pfx_lock_acquire+0x10/0x10 [ 30.580138] ? __pfx_mmap_region+0x10/0x10 [ 30.580722] ? security_mmap_addr+0x7d/0xa0 [ 30.581314] ? get_unmapped_area+0x1f5/0x3f0 [ 30.581899] do_mmap+0x854/0xf00 [ 30.582368] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.582898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.583518] ksys_mmap_pgoff+0x3af/0x500 [ 30.584076] do_syscall_64+0x3f/0x90 [ 30.584590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.585288] RIP: 0033:0x7fddee847d82 [ 30.585774] 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 [ 30.588048] RSP: 002b:00007ffce4dcf468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.589017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddee847d82 [ 30.589923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddedc81000 [ 30.590863] RBP: 00007fddedc81000 R08: 0000000000000009 R09: 0000000000001000 [ 30.591767] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c350ce9ec0 [ 30.592673] R13: 00007ffce4dcf480 R14: 00007ffce4dcf4b0 R15: 00007ffce4dcf810 [ 30.593617] [ 30.593940] [ 30.594177] Allocated by task 213: [ 30.594653] kasan_save_stack+0x22/0x50 [ 30.595215] kasan_set_track+0x25/0x30 [ 30.595761] __kasan_slab_alloc+0x59/0x70 [ 30.596340] kmem_cache_alloc+0x16b/0x370 [ 30.596910] vm_area_dup+0x20/0x160 [ 30.597411] __split_vma+0x170/0x950 [ 30.597927] split_vma+0xc6/0x110 [ 30.598417] mprotect_fixup+0x8d2/0xb30 [ 30.598995] do_mprotect_pkey+0x87e/0xd40 [ 30.599569] __x64_sys_mprotect+0x78/0xc0 [ 30.600148] do_syscall_64+0x3f/0x90 [ 30.600676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.601391] [ 30.601630] Freed by task 213: [ 30.602069] kasan_save_stack+0x22/0x50 [ 30.602631] kasan_set_track+0x25/0x30 [ 30.603185] kasan_save_free_info+0x2b/0x50 [ 30.603774] __kasan_slab_free+0x10a/0x190 [ 30.604368] kmem_cache_free+0x10d/0x4d0 [ 30.604931] rcu_core+0x8c8/0x2860 [ 30.605498] __do_softirq+0x1b7/0x7d4 [ 30.606033] [ 30.606271] Last potentially related work creation: [ 30.606939] kasan_save_stack+0x22/0x50 [ 30.607501] __kasan_record_aux_stack+0x8e/0xa0 [ 30.608136] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.608852] remove_vma+0x139/0x170 [ 30.609353] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.609973] do_vmi_munmap+0x1f1/0x2b0 [ 30.610510] __vm_munmap+0x138/0x3a0 [ 30.611035] __x64_sys_munmap+0x59/0x80 [ 30.611590] do_syscall_64+0x3f/0x90 [ 30.612118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.612834] [ 30.613077] Second to last potentially related work creation: [ 30.613833] kasan_save_stack+0x22/0x50 [ 30.614390] __kasan_record_aux_stack+0x8e/0xa0 [ 30.615043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.615763] remove_vma+0x139/0x170 [ 30.616268] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.616884] do_vmi_munmap+0x1f1/0x2b0 [ 30.617430] mmap_region+0x1f9/0x2660 [ 30.617959] do_mmap+0x854/0xf00 [ 30.618441] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.619095] ksys_mmap_pgoff+0x3af/0x500 [ 30.619638] do_syscall_64+0x3f/0x90 [ 30.620141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.620822] [ 30.621053] The buggy address belongs to the object at ffff88800de961d0 [ 30.621053] which belongs to the cache vm_area_struct of size 168 [ 30.622598] The buggy address is located 88 bytes inside of [ 30.622598] freed 168-byte region [ffff88800de961d0, ffff88800de96278) [ 30.624129] [ 30.624353] The buggy address belongs to the physical page: [ 30.625051] page:00000000557590c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde96 [ 30.626200] memcg:ffff88800e6ddb01 [ 30.626652] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.627398] page_type: 0xffffffff() [ 30.627875] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.628851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6ddb01 [ 30.629819] page dumped because: kasan: bad access detected [ 30.630523] [ 30.630752] Memory state around the buggy address: [ 30.631382] ffff88800de96100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.632279] ffff88800de96180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.633161] >ffff88800de96200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.634047] ^ [ 30.634620] ffff88800de96280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.635511] ffff88800de96300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.636399] ================================================================== [ 30.637342] Disabling lock debugging due to kernel taint [ 32.546334] BUG: Bad rss-counter state mm:00000000074c39ae type:MM_FILEPAGES val:33 [ 32.547160] BUG: Bad rss-counter state mm:00000000074c39ae type:MM_ANONPAGES val:22 [ 33.024844] BUG: Bad rss-counter state mm:00000000983aa63c type:MM_FILEPAGES val:33 [ 33.026091] BUG: Bad rss-counter state mm:00000000983aa63c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46007' (ECDSA) to the list of known hosts. 2023/06/20 19:53:31 fuzzer started 2023/06/20 19:53:31 dialing manager at localhost:36067 2023/06/20 19:53:31 checking machine... 2023/06/20 19:53:31 checking revisions... [ 33.559722] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:53:31 testing simple program... [ 33.597596] cgroup: Unknown subsys name 'net' [ 33.644561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888016d27bd0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6d7d R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff11002da4f7b RIP=ffffffff845368c8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f02db2ff900 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=00007f02db8b70b0 CR3=000000000beaa000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007fbae847d0f0 CR3=000000000d83c000 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=df79fade26638fbab44d8d87218f2344 XMM02=2c67c8bc2e329bc3000000000011ac38 XMM03=fb795ef6d65770560000000000121d28 XMM04=96f892543c5064a300000000000ae988 XMM05=59d5b690e0af863b0000000000132f50 XMM06=00c3ffa147b8d8570000000000132dd8 XMM07=e042d86d42eb936e0000000000121fa8 XMM08=1169f3c043e3bc8e000000000011ac98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000