syzkaller login: [ 30.444042] BUG: Bad rss-counter state mm:000000009aa66518 type:MM_FILEPAGES val:33 [ 30.445343] BUG: Bad rss-counter state mm:000000009aa66518 type:MM_ANONPAGES val:22 [ 30.588065] ================================================================== [ 30.588988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.589919] Read of size 8 at addr ffff88800f81a058 by task sshd/220 [ 30.590848] [ 30.591069] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.591924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.592921] Call Trace: [ 30.593240] [ 30.593519] dump_stack_lvl+0x91/0xf0 [ 30.594015] print_report+0xcc/0x620 [ 30.594492] ? __virt_addr_valid+0x102/0x340 [ 30.595055] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.595689] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.596322] kasan_report+0xbe/0xf0 [ 30.596799] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.597425] vma_interval_tree_remove+0xc75/0xec0 [ 30.598019] vma_prepare+0xc54/0x11a0 [ 30.598492] __split_vma+0x5af/0x950 [ 30.598983] ? __pfx___split_vma+0x10/0x10 [ 30.599516] ? find_held_lock+0x2c/0x110 [ 30.600027] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.600586] ? lock_is_held_type+0x9f/0x120 [ 30.601117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.601730] ? mtree_range_walk+0x632/0x900 [ 30.602280] ? mas_walk+0x5c7/0x7c0 [ 30.602776] do_vmi_munmap+0x1f1/0x2b0 [ 30.603266] mmap_region+0x1f9/0x2660 [ 30.603744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.604248] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.604964] ? __pfx_lock_acquire+0x10/0x10 [ 30.605499] ? __pfx_mmap_region+0x10/0x10 [ 30.606031] ? security_mmap_addr+0x7d/0xa0 [ 30.606554] ? get_unmapped_area+0x1f5/0x3f0 [ 30.607128] do_mmap+0x854/0xf00 [ 30.607564] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.608059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.608619] ksys_mmap_pgoff+0x3af/0x500 [ 30.609119] do_syscall_64+0x3f/0x90 [ 30.609602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.610242] RIP: 0033:0x7f9348275d82 [ 30.610720] 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 [ 30.612829] RSP: 002b:00007ffd4181b438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.613732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9348275d82 [ 30.614592] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93476af000 [ 30.615453] RBP: 00007f93476af000 R08: 0000000000000009 R09: 0000000000001000 [ 30.616306] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613701e2ec0 [ 30.617159] R13: 00007ffd4181b450 R14: 00007ffd4181b480 R15: 00007ffd4181b7e0 [ 30.618009] [ 30.618306] [ 30.618520] Allocated by task 213: [ 30.618964] kasan_save_stack+0x22/0x50 [ 30.619467] kasan_set_track+0x25/0x30 [ 30.619968] __kasan_slab_alloc+0x59/0x70 [ 30.620486] kmem_cache_alloc+0x16b/0x370 [ 30.621014] vm_area_dup+0x20/0x160 [ 30.621470] __split_vma+0x170/0x950 [ 30.621944] split_vma+0xc6/0x110 [ 30.622387] mprotect_fixup+0x8d2/0xb30 [ 30.622891] do_mprotect_pkey+0x87e/0xd40 [ 30.623415] __x64_sys_mprotect+0x78/0xc0 [ 30.623928] do_syscall_64+0x3f/0x90 [ 30.624405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.625048] [ 30.625261] Freed by task 213: [ 30.625651] kasan_save_stack+0x22/0x50 [ 30.626152] kasan_set_track+0x25/0x30 [ 30.626657] kasan_save_free_info+0x2b/0x50 [ 30.627185] __kasan_slab_free+0x10a/0x190 [ 30.627723] kmem_cache_free+0x10d/0x4d0 [ 30.628228] rcu_core+0x8c8/0x2860 [ 30.628675] __do_softirq+0x1b7/0x7d4 [ 30.629150] [ 30.629363] Last potentially related work creation: [ 30.629950] kasan_save_stack+0x22/0x50 [ 30.630461] __kasan_record_aux_stack+0x8e/0xa0 [ 30.631048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.631686] remove_vma+0x139/0x170 [ 30.632142] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.632694] do_vmi_munmap+0x1f1/0x2b0 [ 30.633187] __vm_munmap+0x138/0x3a0 [ 30.633657] __x64_sys_munmap+0x59/0x80 [ 30.634150] do_syscall_64+0x3f/0x90 [ 30.634631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635284] [ 30.635502] The buggy address belongs to the object at ffff88800f81a000 [ 30.635502] which belongs to the cache vm_area_struct of size 168 [ 30.636980] The buggy address is located 88 bytes inside of [ 30.636980] freed 168-byte region [ffff88800f81a000, ffff88800f81a0a8) [ 30.638394] [ 30.638614] The buggy address belongs to the physical page: [ 30.639301] page:0000000030244335 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf81a [ 30.640385] memcg:ffff88801693d701 [ 30.640806] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.641440] page_type: 0xffffffff() [ 30.641888] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.642818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801693d701 [ 30.643724] page dumped because: kasan: bad access detected [ 30.644377] [ 30.644594] Memory state around the buggy address: [ 30.645167] ffff88800f819f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.646020] ffff88800f819f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.646880] >ffff88800f81a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.647742] ^ [ 30.648465] ffff88800f81a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.649315] ffff88800f81a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.650167] ================================================================== [ 30.651559] Disabling lock debugging due to kernel taint [ 32.658632] BUG: Bad rss-counter state mm:0000000075d0cf2e type:MM_FILEPAGES val:33 [ 32.659675] BUG: Bad rss-counter state mm:0000000075d0cf2e type:MM_ANONPAGES val:22 [ 33.170027] BUG: Bad rss-counter state mm:000000002d42b8ca type:MM_FILEPAGES val:33 [ 33.171379] BUG: Bad rss-counter state mm:000000002d42b8ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16056' (ECDSA) to the list of known hosts. 2023/06/21 05:58:40 fuzzer started 2023/06/21 05:58:40 dialing manager at localhost:36067 2023/06/21 05:58:40 checking machine... 2023/06/21 05:58:40 checking revisions... [ 33.899886] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:58:40 testing simple program... [ 33.934119] cgroup: Unknown subsys name 'net' [ 33.972755] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:58:40 Registers: info registers vcpu 0 RAX=ffffed1001c9817c RBX=ffffed1001c9817d RCX=ffffffff812e0126 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88800e4c0be0 RBP=ffffed1001c9817c RSP=ffff88806ce09d30 R8 =0000000000000001 R9 =ffffed1001c9817c R10=ffff88800e4c0be3 R11=00000000000b6a61 R12=ffff88800e4c0be8 R13=ffff88800e4c0bf0 R14=ffffffff813782f8 R15=ffff88800ec80f18 RIP=ffffffff8180f176 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 00007f91e60cb900 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=00007f91e6680650 CR3=0000000018188000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f0dbe64ff10 CR3=000000000d5a4000 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=214fa51896df82820046b4b71f6bfeb5 XMM02=0000000000119f90eff9b2d0a8fce9cb XMM03=000000000011a0602c67c8bc2e329bc3 XMM04=ca5b21f54cd608c000000000000ae988 XMM05=19e9129bd510f23500000000001312e0 XMM06=00603b655ade40b50000000000130148 XMM07=e042d86d42eb936e0000000000121418 XMM08=99d864b0e0d8137a000000000011a060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000