[ 24.444336] BUG: Bad rss-counter state mm:00000000fe37bd3e type:MM_FILEPAGES val:33 [ 24.446383] BUG: Bad rss-counter state mm:00000000fe37bd3e type:MM_ANONPAGES val:22 [ 24.611420] ================================================================== [ 24.612340] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.613292] Read of size 8 at addr ffff88801abd4798 by task sshd/219 [ 24.614060] [ 24.614282] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.615222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.616230] Call Trace: [ 24.616559] [ 24.616851] dump_stack_lvl+0x91/0xf0 [ 24.617353] print_report+0xcc/0x620 [ 24.617839] ? __virt_addr_valid+0x102/0x340 [ 24.618400] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.619010] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.619634] kasan_report+0xbe/0xf0 [ 24.620112] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.620754] vma_interval_tree_remove+0xc75/0xec0 [ 24.621368] vma_prepare+0xc54/0x11a0 [ 24.621850] __split_vma+0x5af/0x950 [ 24.622335] ? __pfx___split_vma+0x10/0x10 [ 24.622865] ? find_held_lock+0x2c/0x110 [ 24.623390] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.623971] ? lock_is_held_type+0x9f/0x120 [ 24.624526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.625144] ? mtree_range_walk+0x632/0x900 [ 24.625708] ? mas_walk+0x5c7/0x7c0 [ 24.626189] do_vmi_munmap+0x1f1/0x2b0 [ 24.626685] mmap_region+0x1f9/0x2660 [ 24.627185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.627703] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.628448] ? __pfx_lock_acquire+0x10/0x10 [ 24.628989] ? __pfx_mmap_region+0x10/0x10 [ 24.629520] ? security_mmap_addr+0x7d/0xa0 [ 24.630062] ? get_unmapped_area+0x1f5/0x3f0 [ 24.630619] do_mmap+0x854/0xf00 [ 24.631069] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.631571] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.632135] ksys_mmap_pgoff+0x3af/0x500 [ 24.632653] do_syscall_64+0x3f/0x90 [ 24.633136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.633791] RIP: 0033:0x7fdc84ebcd82 [ 24.634257] 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 [ 24.636429] RSP: 002b:00007ffe31dda598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.637359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc84ebcd82 [ 24.638212] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc842f6000 [ 24.639059] RBP: 00007fdc842f6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.639901] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557b9ba5ec0 [ 24.640782] R13: 00007ffe31dda5b0 R14: 00007ffe31dda5e0 R15: 00007ffe31dda940 [ 24.641642] [ 24.641939] [ 24.642159] Allocated by task 208: [ 24.642599] kasan_save_stack+0x22/0x50 [ 24.643110] kasan_set_track+0x25/0x30 [ 24.643609] __kasan_slab_alloc+0x59/0x70 [ 24.644139] kmem_cache_alloc+0x16b/0x370 [ 24.644674] vm_area_dup+0x20/0x160 [ 24.645141] __split_vma+0x170/0x950 [ 24.645613] split_vma+0xc6/0x110 [ 24.646058] mprotect_fixup+0x8d2/0xb30 [ 24.646567] do_mprotect_pkey+0x87e/0xd40 [ 24.647089] __x64_sys_mprotect+0x78/0xc0 [ 24.647615] do_syscall_64+0x3f/0x90 [ 24.648104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.648758] [ 24.648974] Freed by task 208: [ 24.649372] kasan_save_stack+0x22/0x50 [ 24.649882] kasan_set_track+0x25/0x30 [ 24.650385] kasan_save_free_info+0x2b/0x50 [ 24.650925] __kasan_slab_free+0x10a/0x190 [ 24.651462] kmem_cache_free+0x10d/0x4d0 [ 24.651974] rcu_core+0x8c8/0x2860 [ 24.652435] __do_softirq+0x1b7/0x7d4 [ 24.652916] [ 24.653131] Last potentially related work creation: [ 24.653736] kasan_save_stack+0x22/0x50 [ 24.654251] __kasan_record_aux_stack+0x8e/0xa0 [ 24.654843] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.655493] remove_vma+0x139/0x170 [ 24.655949] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.656528] do_vmi_munmap+0x1f1/0x2b0 [ 24.657026] __vm_munmap+0x138/0x3a0 [ 24.657495] __x64_sys_munmap+0x59/0x80 [ 24.658003] do_syscall_64+0x3f/0x90 [ 24.658489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.659146] [ 24.659364] The buggy address belongs to the object at ffff88801abd4740 [ 24.659364] which belongs to the cache vm_area_struct of size 168 [ 24.660849] The buggy address is located 88 bytes inside of [ 24.660849] freed 168-byte region [ffff88801abd4740, ffff88801abd47e8) [ 24.662267] [ 24.662489] The buggy address belongs to the physical page: [ 24.663157] page:000000007ec2cd22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1abd4 [ 24.664279] memcg:ffff88801abad701 [ 24.664708] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.665357] page_type: 0xffffffff() [ 24.665809] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.666734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801abad701 [ 24.667655] page dumped because: kasan: bad access detected [ 24.668329] [ 24.668541] Memory state around the buggy address: [ 24.669121] ffff88801abd4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.669974] ffff88801abd4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.670838] >ffff88801abd4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.671687] ^ [ 24.672178] ffff88801abd4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.673052] ffff88801abd4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.673906] ================================================================== [ 24.674894] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.521291] BUG: Bad rss-counter state mm:0000000013c559ed type:MM_FILEPAGES val:33 [ 26.522232] BUG: Bad rss-counter state mm:0000000013c559ed type:MM_ANONPAGES val:22 [ 27.017994] BUG: Bad rss-counter state mm:00000000f491ddd4 type:MM_FILEPAGES val:33 [ 27.019028] BUG: Bad rss-counter state mm:00000000f491ddd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50930' (ECDSA) to the list of known hosts. 2023/06/20 14:46:57 fuzzer started 2023/06/20 14:46:57 dialing manager at localhost:36067 2023/06/20 14:46:57 checking machine... 2023/06/20 14:46:57 checking revisions... [ 27.666237] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:46:57 testing simple program... [ 27.710442] cgroup: Unknown subsys name 'net' [ 27.763583] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:46:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000007c RCX=ffffffff83723e30 RDX=ffff888016080000 RSI=0000000000000000 RDI=0000000000000005 RBP=000000000000007d RSP=ffff88800ff677b8 R8 =0000000000000005 R9 =0000000000000011 R10=000000000000007c R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99ec0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c086b RFL=00000202 [-------] 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 00007f20ecb34900 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=00007f20ed0eb618 CR3=000000000f760000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888014347cd0 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf0a001 RSI=ffff88806cf09ff8 RDI=ffff88806cf09ff8 RBP=ffff88806cf09ac8 RSP=ffff88806cf099f8 R8 =ffffffff864b2f42 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ff8 R15=ffff88806cf09a70 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f425a8a3900 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=00007f4259cca9f0 CR3=0000000009a66000 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=00cf76bc51ecc29527432174b846af42 XMM02=ec2efd57dc4c00df000000000011c370 XMM03=2b1f5ef475e6d6e4000000000011c440 XMM04=e4cd9b141b91d96900000000000ae988 XMM05=f86c4683ce2a5ab50000000000133698 XMM06=dfcdbad4f1609c3700000000001321c0 XMM07=fb795ef6d657705600000000001219c0 XMM08=2c67c8bc2e329bc3000000000011c3e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000