[ 33.895351] BUG: Bad rss-counter state mm:000000002e5ce62d type:MM_FILEPAGES val:33 [ 33.896758] BUG: Bad rss-counter state mm:000000002e5ce62d type:MM_ANONPAGES val:22 [ 34.036237] ================================================================== [ 34.037351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.038361] Read of size 8 at addr ffff88800db22798 by task sshd/219 [ 34.039380] [ 34.039660] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.040551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.041562] Call Trace: [ 34.041886] [ 34.042191] dump_stack_lvl+0x91/0xf0 [ 34.042689] print_report+0xcc/0x620 [ 34.043185] ? __virt_addr_valid+0x102/0x340 [ 34.043748] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.044391] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.045062] kasan_report+0xbe/0xf0 [ 34.045541] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.046177] vma_interval_tree_remove+0xc75/0xec0 [ 34.046782] vma_prepare+0xc54/0x11a0 [ 34.047275] __split_vma+0x5af/0x950 [ 34.047754] ? __pfx___split_vma+0x10/0x10 [ 34.048302] ? find_held_lock+0x2c/0x110 [ 34.048849] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.049438] ? lock_is_held_type+0x9f/0x120 [ 34.049975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.050598] ? mtree_range_walk+0x632/0x900 [ 34.051170] ? mas_walk+0x5c7/0x7c0 [ 34.051641] do_vmi_munmap+0x1f1/0x2b0 [ 34.052149] mmap_region+0x1f9/0x2660 [ 34.052632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.053170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.053883] ? __pfx_lock_acquire+0x10/0x10 [ 34.054432] ? __pfx_mmap_region+0x10/0x10 [ 34.054961] ? security_mmap_addr+0x7d/0xa0 [ 34.055498] ? get_unmapped_area+0x1f5/0x3f0 [ 34.056069] do_mmap+0x854/0xf00 [ 34.056517] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.057045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.057611] ksys_mmap_pgoff+0x3af/0x500 [ 34.058134] do_syscall_64+0x3f/0x90 [ 34.058613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.059273] RIP: 0033:0x7ff725d5dd82 [ 34.059733] 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 [ 34.061898] RSP: 002b:00007fff7126f7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.062813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff725d5dd82 [ 34.063680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff725197000 [ 34.064544] RBP: 00007ff725197000 R08: 0000000000000009 R09: 0000000000001000 [ 34.065421] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b973e18b20 [ 34.066274] R13: 00007fff7126f7d0 R14: 00007fff7126f800 R15: 00007fff7126fb60 [ 34.067142] [ 34.067436] [ 34.067652] Allocated by task 212: [ 34.068100] kasan_save_stack+0x22/0x50 [ 34.068604] kasan_set_track+0x25/0x30 [ 34.069129] __kasan_slab_alloc+0x59/0x70 [ 34.069651] kmem_cache_alloc+0x16b/0x370 [ 34.070178] vm_area_dup+0x20/0x160 [ 34.070634] __split_vma+0x170/0x950 [ 34.071113] split_vma+0xc6/0x110 [ 34.071555] mprotect_fixup+0x8d2/0xb30 [ 34.072072] do_mprotect_pkey+0x87e/0xd40 [ 34.072594] __x64_sys_mprotect+0x78/0xc0 [ 34.073153] do_syscall_64+0x3f/0x90 [ 34.073624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.074280] [ 34.074496] Freed by task 19: [ 34.074878] kasan_save_stack+0x22/0x50 [ 34.075392] kasan_set_track+0x25/0x30 [ 34.075889] kasan_save_free_info+0x2b/0x50 [ 34.076439] __kasan_slab_free+0x10a/0x190 [ 34.077014] kmem_cache_free+0x10d/0x4d0 [ 34.077534] rcu_core+0x8c8/0x2860 [ 34.077978] __do_softirq+0x1b7/0x7d4 [ 34.078467] [ 34.078683] Last potentially related work creation: [ 34.079275] kasan_save_stack+0x22/0x50 [ 34.079779] __kasan_record_aux_stack+0x8e/0xa0 [ 34.080507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.081201] remove_vma+0x139/0x170 [ 34.081658] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.082223] do_vmi_munmap+0x1f1/0x2b0 [ 34.082707] __vm_munmap+0x138/0x3a0 [ 34.083187] __x64_sys_munmap+0x59/0x80 [ 34.083689] do_syscall_64+0x3f/0x90 [ 34.084193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.084859] [ 34.085088] The buggy address belongs to the object at ffff88800db22740 [ 34.085088] which belongs to the cache vm_area_struct of size 168 [ 34.086597] The buggy address is located 88 bytes inside of [ 34.086597] freed 168-byte region [ffff88800db22740, ffff88800db227e8) [ 34.088029] [ 34.088253] The buggy address belongs to the physical page: [ 34.088931] page:00000000f4be7d6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb22 [ 34.090047] memcg:ffff88800ded7701 [ 34.090477] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.091143] page_type: 0xffffffff() [ 34.091599] raw: 0100000000000200 ffff88800879fc80 ffffea00003606c0 dead000000000008 [ 34.092538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ded7701 [ 34.093476] page dumped because: kasan: bad access detected [ 34.094152] [ 34.094371] Memory state around the buggy address: [ 34.094942] ffff88800db22680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.095810] ffff88800db22700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.096672] >ffff88800db22780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.097793] ^ [ 34.098402] ffff88800db22800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.099448] ffff88800db22880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.100508] ================================================================== [ 34.101666] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.382913] BUG: Bad rss-counter state mm:000000003b016883 type:MM_FILEPAGES val:33 [ 36.384061] BUG: Bad rss-counter state mm:000000003b016883 type:MM_ANONPAGES val:22 [ 36.756658] BUG: Bad rss-counter state mm:00000000503c653b type:MM_FILEPAGES val:33 [ 36.757954] BUG: Bad rss-counter state mm:00000000503c653b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26879' (ECDSA) to the list of known hosts. 2023/06/19 21:18:54 fuzzer started 2023/06/19 21:18:54 dialing manager at localhost:44161 2023/06/19 21:18:54 checking machine... 2023/06/19 21:18:54 checking revisions... [ 37.511609] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:18:55 testing simple program... [ 37.562810] cgroup: Unknown subsys name 'net' [ 37.611881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83c13900 RDX=1ffff1100286b679 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff8880175d7a88 RSP=ffff8880175d78e0 R8 =0000000000000000 R9 =ffffed100286b679 R10=ffff88801435b3cf R11=63206e6f69737365 R12=ffff8880175d7e60 R13=0000000000000000 R14=ffff88801435b3c8 R15=1ffff11002ebaf1d RIP=ffffffff814c0324 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 00007f4c56717700 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=00007fe6b592f618 CR3=00000000181ba000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732034353a3831 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323838 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000da725d8e RBX=000000001d2b9005 RCX=ffff88806cf09be8 RDX=0000000000000007 RSI=0000000000000008 RDI=00000000a9ac1f16 RBP=ffffffff813782a8 RSP=ffff88806cf09b68 R8 =00000000da725d8e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff82270ee0 RFL=00000216 [----AP-] 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 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=00007f24802c8cd0 CR3=000000000d7ca000 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=d068b35491190eb1044355a3c212f0dd XMM02=000000000011e698eff9b2d0a8fce9cb XMM03=000000000011e7682c67c8bc2e329bc3 XMM04=a6a487ea4a9a332600000000000ae988 XMM05=dfcdbad4f1609c370000000000134198 XMM06=806171799158d9670000000000134020 XMM07=e042d86d42eb936e0000000000124be8 XMM08=a1f1c6692bf77af1000000000011e768 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000