syzkaller login: [ 32.490701] BUG: Bad rss-counter state mm:000000008bd4872f type:MM_FILEPAGES val:33 [ 32.492595] BUG: Bad rss-counter state mm:000000008bd4872f type:MM_ANONPAGES val:22 [ 32.651198] ================================================================== [ 32.652104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.653036] Read of size 8 at addr ffff88800f14b310 by task sshd/221 [ 32.653801] [ 32.654016] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.654939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.655906] Call Trace: [ 32.656225] [ 32.656509] dump_stack_lvl+0x91/0xf0 [ 32.657012] print_report+0xcc/0x620 [ 32.657498] ? __virt_addr_valid+0x102/0x340 [ 32.658044] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.658662] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.659272] kasan_report+0xbe/0xf0 [ 32.659737] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.660348] vma_interval_tree_remove+0xc75/0xec0 [ 32.660953] vma_prepare+0xc54/0x11a0 [ 32.661448] __split_vma+0x5af/0x950 [ 32.661919] ? __pfx___split_vma+0x10/0x10 [ 32.662455] ? find_held_lock+0x2c/0x110 [ 32.662981] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.663549] ? lock_is_held_type+0x9f/0x120 [ 32.664090] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.664697] ? mtree_range_walk+0x632/0x900 [ 32.665266] ? mas_walk+0x5c7/0x7c0 [ 32.665738] do_vmi_munmap+0x1f1/0x2b0 [ 32.666240] mmap_region+0x1f9/0x2660 [ 32.666730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.667237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.667951] ? __pfx_lock_acquire+0x10/0x10 [ 32.668489] ? __pfx_mmap_region+0x10/0x10 [ 32.669026] ? security_mmap_addr+0x7d/0xa0 [ 32.669558] ? get_unmapped_area+0x1f5/0x3f0 [ 32.670108] do_mmap+0x854/0xf00 [ 32.670553] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.671040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.671600] ksys_mmap_pgoff+0x3af/0x500 [ 32.672109] do_syscall_64+0x3f/0x90 [ 32.672592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.673259] RIP: 0033:0x7f9721051d82 [ 32.673716] 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 [ 32.675822] RSP: 002b:00007ffc25b3b048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.676719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9721051d82 [ 32.677572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f972048b000 [ 32.678411] RBP: 00007f972048b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.679258] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560431e0f60 [ 32.680094] R13: 00007ffc25b3b060 R14: 00007ffc25b3b090 R15: 00007ffc25b3b3f0 [ 32.680946] [ 32.681243] [ 32.681461] Allocated by task 214: [ 32.681888] kasan_save_stack+0x22/0x50 [ 32.682387] kasan_set_track+0x25/0x30 [ 32.682887] __kasan_slab_alloc+0x59/0x70 [ 32.683412] kmem_cache_alloc+0x16b/0x370 [ 32.683921] vm_area_dup+0x20/0x160 [ 32.684375] __split_vma+0x170/0x950 [ 32.684844] split_vma+0xc6/0x110 [ 32.685304] mprotect_fixup+0x8d2/0xb30 [ 32.685806] do_mprotect_pkey+0x87e/0xd40 [ 32.686326] __x64_sys_mprotect+0x78/0xc0 [ 32.686846] do_syscall_64+0x3f/0x90 [ 32.687327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.687986] [ 32.688209] Freed by task 214: [ 32.688617] kasan_save_stack+0x22/0x50 [ 32.689136] kasan_set_track+0x25/0x30 [ 32.689643] kasan_save_free_info+0x2b/0x50 [ 32.690189] __kasan_slab_free+0x10a/0x190 [ 32.690734] kmem_cache_free+0x10d/0x4d0 [ 32.691259] rcu_core+0x8c8/0x2860 [ 32.691719] __do_softirq+0x1b7/0x7d4 [ 32.692203] [ 32.692423] Last potentially related work creation: [ 32.693048] kasan_save_stack+0x22/0x50 [ 32.693570] __kasan_record_aux_stack+0x8e/0xa0 [ 32.694160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.694826] remove_vma+0x139/0x170 [ 32.695288] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.695868] do_vmi_munmap+0x1f1/0x2b0 [ 32.696368] __vm_munmap+0x138/0x3a0 [ 32.696853] __x64_sys_munmap+0x59/0x80 [ 32.697368] do_syscall_64+0x3f/0x90 [ 32.697851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.698516] [ 32.698739] The buggy address belongs to the object at ffff88800f14b2b8 [ 32.698739] which belongs to the cache vm_area_struct of size 168 [ 32.700261] The buggy address is located 88 bytes inside of [ 32.700261] freed 168-byte region [ffff88800f14b2b8, ffff88800f14b360) [ 32.701736] [ 32.701957] The buggy address belongs to the physical page: [ 32.702644] page:0000000077516b7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf14b [ 32.703763] memcg:ffff88801943be01 [ 32.704203] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.704868] page_type: 0xffffffff() [ 32.705342] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.706300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801943be01 [ 32.707239] page dumped because: kasan: bad access detected [ 32.707922] [ 32.708146] Memory state around the buggy address: [ 32.708754] ffff88800f14b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.709650] ffff88800f14b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.710539] >ffff88800f14b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.711403] ^ [ 32.711887] ffff88800f14b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.712782] ffff88800f14b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.713687] ================================================================== [ 32.714803] Disabling lock debugging due to kernel taint [ 34.675741] BUG: Bad rss-counter state mm:0000000038e91f3e type:MM_FILEPAGES val:33 [ 34.676704] BUG: Bad rss-counter state mm:0000000038e91f3e type:MM_ANONPAGES val:22 [ 35.171499] BUG: Bad rss-counter state mm:0000000070b2a68f type:MM_FILEPAGES val:33 [ 35.172584] BUG: Bad rss-counter state mm:0000000070b2a68f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15573' (ECDSA) to the list of known hosts. 2023/06/19 12:25:39 fuzzer started 2023/06/19 12:25:40 dialing manager at localhost:44161 2023/06/19 12:25:40 checking machine... 2023/06/19 12:25:40 checking revisions... [ 35.870410] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:25:40 testing simple program... [ 35.904847] cgroup: Unknown subsys name 'net' [ 35.942944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:25:38 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=ffff888008c58000 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=00007ffc40114ba8 CR3=0000000009534000 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=2039333a35323a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a35323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f4a0f1645a0 CR3=000000000d5f6000 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=baf68901ccdb23a11246bc2d9c77e339 XMM02=2c67c8bc2e329bc3000000000011f4c0 XMM03=fb795ef6d65770560000000000123c60 XMM04=68001175233f389c00000000000ae988 XMM05=e4cb8bb95a7664b600000000001337e8 XMM06=c00c8749fc9d6fbe0000000000132650 XMM07=e042d86d42eb936e0000000000123ee0 XMM08=a8da07705a50e171000000000011f520 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000