[ 31.551765] BUG: Bad rss-counter state mm:00000000447dbe0e type:MM_FILEPAGES val:33 [ 31.553068] BUG: Bad rss-counter state mm:00000000447dbe0e type:MM_ANONPAGES val:22 [ 31.592237] ================================================================== [ 31.593221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.594150] Read of size 8 at addr ffff888019b31d08 by task sshd/218 [ 31.594909] [ 31.595125] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.595983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.596949] Call Trace: [ 31.597261] <TASK> [ 31.597538] dump_stack_lvl+0x91/0xf0 [ 31.598014] print_report+0xcc/0x620 [ 31.598483] ? __virt_addr_valid+0x102/0x340 [ 31.599037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.599648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600267] kasan_report+0xbe/0xf0 [ 31.600739] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601352] vma_interval_tree_remove+0xc75/0xec0 [ 31.601965] vma_prepare+0xc54/0x11a0 [ 31.602440] __split_vma+0x5af/0x950 [ 31.602909] ? __pfx___split_vma+0x10/0x10 [ 31.603440] ? find_held_lock+0x2c/0x110 [ 31.603965] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.604544] ? lock_is_held_type+0x9f/0x120 [ 31.605083] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.605691] ? mtree_range_walk+0x632/0x900 [ 31.606242] ? mas_walk+0x5c7/0x7c0 [ 31.606715] do_vmi_munmap+0x1f1/0x2b0 [ 31.607207] mmap_region+0x1f9/0x2660 [ 31.607685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.608201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.608912] ? __pfx_lock_acquire+0x10/0x10 [ 31.609443] ? __pfx_mmap_region+0x10/0x10 [ 31.609978] ? security_mmap_addr+0x7d/0xa0 [ 31.610514] ? get_unmapped_area+0x1f5/0x3f0 [ 31.611061] do_mmap+0x854/0xf00 [ 31.611499] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.611990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.612553] ksys_mmap_pgoff+0x3af/0x500 [ 31.613063] do_syscall_64+0x3f/0x90 [ 31.613541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614183] RIP: 0033:0x7fe45a8a4d82 [ 31.614643] 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 [ 31.616784] RSP: 002b:00007fffe291d5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.617667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe45a8a4d82 [ 31.618494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe459cde000 [ 31.619456] RBP: 00007fe459cde000 R08: 0000000000000009 R09: 0000000000001000 [ 31.620300] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591b3896b20 [ 31.621129] R13: 00007fffe291d610 R14: 00007fffe291d640 R15: 00007fffe291d9a0 [ 31.621979] </TASK> [ 31.622265] [ 31.622479] Allocated by task 210: [ 31.622891] kasan_save_stack+0x22/0x50 [ 31.623381] kasan_set_track+0x25/0x30 [ 31.623865] __kasan_slab_alloc+0x59/0x70 [ 31.624395] kmem_cache_alloc+0x16b/0x370 [ 31.624911] vm_area_dup+0x20/0x160 [ 31.625358] __split_vma+0x170/0x950 [ 31.625812] split_vma+0xc6/0x110 [ 31.626238] mprotect_fixup+0x8d2/0xb30 [ 31.626735] do_mprotect_pkey+0x87e/0xd40 [ 31.627244] __x64_sys_mprotect+0x78/0xc0 [ 31.627747] do_syscall_64+0x3f/0x90 [ 31.628212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.628838] [ 31.629049] Freed by task 210: [ 31.629428] kasan_save_stack+0x22/0x50 [ 31.629917] kasan_set_track+0x25/0x30 [ 31.630397] kasan_save_free_info+0x2b/0x50 [ 31.630908] __kasan_slab_free+0x10a/0x190 [ 31.631424] kmem_cache_free+0x10d/0x4d0 [ 31.631913] rcu_core+0x8c8/0x2860 [ 31.632355] __do_softirq+0x1b7/0x7d4 [ 31.632822] [ 31.633035] Last potentially related work creation: [ 31.633606] kasan_save_stack+0x22/0x50 [ 31.634097] __kasan_record_aux_stack+0x8e/0xa0 [ 31.634656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.635284] remove_vma+0x139/0x170 [ 31.635721] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.636288] do_vmi_munmap+0x1f1/0x2b0 [ 31.636754] __vm_munmap+0x138/0x3a0 [ 31.637211] __x64_sys_munmap+0x59/0x80 [ 31.637690] do_syscall_64+0x3f/0x90 [ 31.638151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.638772] [ 31.638983] The buggy address belongs to the object at ffff888019b31cb0 [ 31.638983] which belongs to the cache vm_area_struct of size 168 [ 31.640430] The buggy address is located 88 bytes inside of [ 31.640430] freed 168-byte region [ffff888019b31cb0, ffff888019b31d58) [ 31.641838] [ 31.642052] The buggy address belongs to the physical page: [ 31.642690] page:00000000273e66d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b31 [ 31.643741] memcg:ffff888019b2a401 [ 31.644157] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.644804] page_type: 0xffffffff() [ 31.645248] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.646150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b2a401 [ 31.647041] page dumped because: kasan: bad access detected [ 31.647686] [ 31.647896] Memory state around the buggy address: [ 31.648474] ffff888019b31c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.649315] ffff888019b31c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.650152] >ffff888019b31d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.650974] ^ [ 31.651399] ffff888019b31d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.652226] ffff888019b31e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.653078] ================================================================== [ 31.654205] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.413454] BUG: Bad rss-counter state mm:0000000070c4232e type:MM_FILEPAGES val:33 [ 33.414438] BUG: Bad rss-counter state mm:0000000070c4232e type:MM_ANONPAGES val:22 [ 33.915974] BUG: Bad rss-counter state mm:00000000d36287df type:MM_FILEPAGES val:33 [ 33.917657] BUG: Bad rss-counter state mm:00000000d36287df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1181' (ECDSA) to the list of known hosts. 2023/06/21 02:39:30 fuzzer started 2023/06/21 02:39:31 dialing manager at localhost:36067 2023/06/21 02:39:31 checking machine... 2023/06/21 02:39:31 checking revisions... [ 34.637678] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:39:31 testing simple program... [ 34.682444] cgroup: Unknown subsys name 'net' [ 34.742379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:39:30 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f37104c19d0 CR3=000000000fe9a000 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=2030333a39333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a39333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8180ce88 RDX=dffffc0000000000 RSI=ffffffff8180ce89 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138eb4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130719 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 00007f82fb07d900 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=00007ffe2e31c000 CR3=0000000016530000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000