[ 39.273405] BUG: Bad rss-counter state mm:00000000f959b52b type:MM_FILEPAGES val:33 [ 39.274350] BUG: Bad rss-counter state mm:00000000f959b52b type:MM_ANONPAGES val:22 [ 39.389417] ================================================================== [ 39.390088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.390735] Read of size 8 at addr ffff88800d9455c8 by task sshd/218 [ 39.391317] [ 39.391470] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.392097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.392782] Call Trace: [ 39.393004] [ 39.393452] dump_stack_lvl+0x91/0xf0 [ 39.393795] print_report+0xcc/0x620 [ 39.394140] ? __virt_addr_valid+0x102/0x340 [ 39.394525] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.394946] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.395437] kasan_report+0xbe/0xf0 [ 39.395756] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.396152] vma_interval_tree_remove+0xc75/0xec0 [ 39.396555] vma_prepare+0xc54/0x11a0 [ 39.396897] __split_vma+0x5af/0x950 [ 39.397241] ? __pfx___split_vma+0x10/0x10 [ 39.397634] ? find_held_lock+0x2c/0x110 [ 39.398022] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.398395] ? lock_is_held_type+0x9f/0x120 [ 39.398773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.399237] ? mtree_range_walk+0x632/0x900 [ 39.399620] ? mas_walk+0x5c7/0x7c0 [ 39.399952] do_vmi_munmap+0x1f1/0x2b0 [ 39.400307] mmap_region+0x1f9/0x2660 [ 39.400616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.400966] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.401451] ? __pfx_lock_acquire+0x10/0x10 [ 39.401835] ? __pfx_mmap_region+0x10/0x10 [ 39.402185] ? security_mmap_addr+0x7d/0xa0 [ 39.402530] ? get_unmapped_area+0x1f5/0x3f0 [ 39.402887] do_mmap+0x854/0xf00 [ 39.403238] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.403574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.403955] ksys_mmap_pgoff+0x3af/0x500 [ 39.404294] do_syscall_64+0x3f/0x90 [ 39.404605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.405052] RIP: 0033:0x7f92b3cd6d82 [ 39.405373] 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 [ 39.406785] RSP: 002b:00007ffdfcc37f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.407401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92b3cd6d82 [ 39.407936] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92b3110000 [ 39.408469] RBP: 00007f92b3110000 R08: 0000000000000009 R09: 0000000000001000 [ 39.409011] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc7c7fdb20 [ 39.409577] R13: 00007ffdfcc37fa0 R14: 00007ffdfcc37fd0 R15: 00007ffdfcc38330 [ 39.410170] [ 39.410372] [ 39.410524] Allocated by task 211: [ 39.410832] kasan_save_stack+0x22/0x50 [ 39.411211] kasan_set_track+0x25/0x30 [ 39.411519] __kasan_slab_alloc+0x59/0x70 [ 39.411847] kmem_cache_alloc+0x16b/0x370 [ 39.412188] vm_area_dup+0x20/0x160 [ 39.412493] __split_vma+0x170/0x950 [ 39.412813] split_vma+0xc6/0x110 [ 39.413111] mprotect_fixup+0x8d2/0xb30 [ 39.413450] do_mprotect_pkey+0x87e/0xd40 [ 39.413813] __x64_sys_mprotect+0x78/0xc0 [ 39.414168] do_syscall_64+0x3f/0x90 [ 39.414488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.414923] [ 39.415126] Freed by task 211: [ 39.415379] kasan_save_stack+0x22/0x50 [ 39.415721] kasan_set_track+0x25/0x30 [ 39.416028] kasan_save_free_info+0x2b/0x50 [ 39.416361] __kasan_slab_free+0x10a/0x190 [ 39.416728] kmem_cache_free+0x10d/0x4d0 [ 39.417055] rcu_core+0x8c8/0x2860 [ 39.417354] __do_softirq+0x1b7/0x7d4 [ 39.417662] [ 39.417806] Last potentially related work creation: [ 39.418197] kasan_save_stack+0x22/0x50 [ 39.418524] __kasan_record_aux_stack+0x8e/0xa0 [ 39.418883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.419342] remove_vma+0x139/0x170 [ 39.419628] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.419984] do_vmi_munmap+0x1f1/0x2b0 [ 39.420295] __vm_munmap+0x138/0x3a0 [ 39.420599] __x64_sys_munmap+0x59/0x80 [ 39.420915] do_syscall_64+0x3f/0x90 [ 39.421232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.421643] [ 39.421780] The buggy address belongs to the object at ffff88800d945570 [ 39.421780] which belongs to the cache vm_area_struct of size 168 [ 39.422685] The buggy address is located 88 bytes inside of [ 39.422685] freed 168-byte region [ffff88800d945570, ffff88800d945618) [ 39.423660] [ 39.423802] The buggy address belongs to the physical page: [ 39.424234] page:0000000078d87db5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd945 [ 39.424936] memcg:ffff88801a34e401 [ 39.425208] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.425630] page_type: 0xffffffff() [ 39.425930] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.426533] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a34e401 [ 39.427149] page dumped because: kasan: bad access detected [ 39.427582] [ 39.427721] Memory state around the buggy address: [ 39.428099] ffff88800d945480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.428677] ffff88800d945500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.429258] >ffff88800d945580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.429847] ^ [ 39.430293] ffff88800d945600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.430876] ffff88800d945680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.431497] ================================================================== [ 39.432230] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.306464] BUG: Bad rss-counter state mm:0000000082d147f5 type:MM_FILEPAGES val:33 [ 41.307028] BUG: Bad rss-counter state mm:0000000082d147f5 type:MM_ANONPAGES val:22 [ 41.751991] BUG: Bad rss-counter state mm:00000000e20e57d8 type:MM_FILEPAGES val:33 [ 41.752770] BUG: Bad rss-counter state mm:00000000e20e57d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23760' (ECDSA) to the list of known hosts. 2023/06/20 08:42:26 fuzzer started 2023/06/20 08:42:26 dialing manager at localhost:44161 2023/06/20 08:42:26 checking machine... 2023/06/20 08:42:26 checking revisions... [ 42.265160] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:42:27 testing simple program... [ 42.299432] cgroup: Unknown subsys name 'net' [ 42.336647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:42:18 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=00007f8f704a2ca0 CR3=000000000e352000 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=2036323a32343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100340afdb RBX=ffff88801a057ea8 RCX=1ffff11002fe3c14 RDX=dffffc0000000000 RSI=ffff88800dc43700 RDI=ffff88801a057ed8 RBP=ffff888017f1e070 RSP=ffff88801698f398 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800dc43600 R13=0000000000000000 R14=ffff88801a0c4af8 R15=ffff88801a0c4ab0 RIP=ffffffff818474fe RFL=00000046 [---Z-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 00007fdf4cb14900 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=00007fdf4caf3020 CR3=00000000158f0000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000