[ 26.109829] BUG: Bad rss-counter state mm:000000008a566a89 type:MM_FILEPAGES val:33 [ 26.110890] BUG: Bad rss-counter state mm:000000008a566a89 type:MM_ANONPAGES val:22 [ 26.274677] ================================================================== [ 26.275761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.276915] Read of size 8 at addr ffff888018738058 by task sshd/219 [ 26.277978] [ 26.278199] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.279063] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.280069] Call Trace: [ 26.280389] [ 26.280682] dump_stack_lvl+0x91/0xf0 [ 26.281174] print_report+0xcc/0x620 [ 26.281653] ? __virt_addr_valid+0x102/0x340 [ 26.282214] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.282834] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.283454] kasan_report+0xbe/0xf0 [ 26.283931] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.284570] vma_interval_tree_remove+0xc75/0xec0 [ 26.285204] vma_prepare+0xc54/0x11a0 [ 26.285682] __split_vma+0x5af/0x950 [ 26.286158] ? __pfx___split_vma+0x10/0x10 [ 26.286685] ? find_held_lock+0x2c/0x110 [ 26.287206] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.287781] ? lock_is_held_type+0x9f/0x120 [ 26.288341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.288953] ? mtree_range_walk+0x632/0x900 [ 26.289507] ? mas_walk+0x5c7/0x7c0 [ 26.289979] do_vmi_munmap+0x1f1/0x2b0 [ 26.290476] mmap_region+0x1f9/0x2660 [ 26.290960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.291468] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.292190] ? __pfx_lock_acquire+0x10/0x10 [ 26.292722] ? __pfx_mmap_region+0x10/0x10 [ 26.293300] ? security_mmap_addr+0x7d/0xa0 [ 26.293834] ? get_unmapped_area+0x1f5/0x3f0 [ 26.294389] do_mmap+0x854/0xf00 [ 26.294830] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.295327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.295898] ksys_mmap_pgoff+0x3af/0x500 [ 26.296428] do_syscall_64+0x3f/0x90 [ 26.296907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.297547] RIP: 0033:0x7f73bb7f8d82 [ 26.298009] 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 [ 26.300142] RSP: 002b:00007ffc277db458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.301058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73bb7f8d82 [ 26.301904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73bac32000 [ 26.302751] RBP: 00007f73bac32000 R08: 0000000000000009 R09: 0000000000001000 [ 26.303604] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591dd56ff70 [ 26.304468] R13: 00007ffc277db470 R14: 00007ffc277db4a0 R15: 00007ffc277db800 [ 26.305378] [ 26.305687] [ 26.305905] Allocated by task 212: [ 26.306332] kasan_save_stack+0x22/0x50 [ 26.306842] kasan_set_track+0x25/0x30 [ 26.307330] __kasan_slab_alloc+0x59/0x70 [ 26.307852] kmem_cache_alloc+0x16b/0x370 [ 26.308379] vm_area_dup+0x20/0x160 [ 26.308830] __split_vma+0x170/0x950 [ 26.309288] split_vma+0xc6/0x110 [ 26.309722] mprotect_fixup+0x8d2/0xb30 [ 26.310229] do_mprotect_pkey+0x87e/0xd40 [ 26.310750] __x64_sys_mprotect+0x78/0xc0 [ 26.311275] do_syscall_64+0x3f/0x90 [ 26.311741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.312413] [ 26.312633] Freed by task 19: [ 26.313011] kasan_save_stack+0x22/0x50 [ 26.313520] kasan_set_track+0x25/0x30 [ 26.314005] kasan_save_free_info+0x2b/0x50 [ 26.314540] __kasan_slab_free+0x10a/0x190 [ 26.315068] kmem_cache_free+0x10d/0x4d0 [ 26.315574] rcu_core+0x8c8/0x2860 [ 26.316018] __do_softirq+0x1b7/0x7d4 [ 26.316501] [ 26.316717] Last potentially related work creation: [ 26.317301] kasan_save_stack+0x22/0x50 [ 26.317804] __kasan_record_aux_stack+0x8e/0xa0 [ 26.318380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.319018] remove_vma+0x139/0x170 [ 26.319471] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.320019] do_vmi_munmap+0x1f1/0x2b0 [ 26.320524] __vm_munmap+0x138/0x3a0 [ 26.320991] __x64_sys_munmap+0x59/0x80 [ 26.321494] do_syscall_64+0x3f/0x90 [ 26.321966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.322618] [ 26.322831] The buggy address belongs to the object at ffff888018738000 [ 26.322831] which belongs to the cache vm_area_struct of size 168 [ 26.324304] The buggy address is located 88 bytes inside of [ 26.324304] freed 168-byte region [ffff888018738000, ffff8880187380a8) [ 26.325691] [ 26.325910] The buggy address belongs to the physical page: [ 26.326564] page:000000004b02b146 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18738 [ 26.327646] memcg:ffff88800f310201 [ 26.328084] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.328723] page_type: 0xffffffff() [ 26.329174] raw: 0100000000000200 ffff88800879fc80 ffffea00003fe5c0 dead000000000008 [ 26.330081] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f310201 [ 26.330979] page dumped because: kasan: bad access detected [ 26.331630] [ 26.331844] Memory state around the buggy address: [ 26.332444] ffff888018737f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.333308] ffff888018737f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.334168] >ffff888018738000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.335029] ^ [ 26.335759] ffff888018738080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 26.336646] ffff888018738100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.337519] ================================================================== [ 26.338514] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.596513] BUG: Bad rss-counter state mm:0000000072fe0909 type:MM_FILEPAGES val:33 [ 28.598255] BUG: Bad rss-counter state mm:0000000072fe0909 type:MM_ANONPAGES val:22 [ 29.080503] BUG: Bad rss-counter state mm:000000000acb7d36 type:MM_FILEPAGES val:33 [ 29.081482] BUG: Bad rss-counter state mm:000000000acb7d36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13487' (ECDSA) to the list of known hosts. 2023/06/19 14:47:54 fuzzer started 2023/06/19 14:47:54 dialing manager at localhost:44161 2023/06/19 14:47:54 checking machine... 2023/06/19 14:47:54 checking revisions... [ 29.807355] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:47:54 testing simple program... [ 29.861701] cgroup: Unknown subsys name 'net' [ 29.915253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:47:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00007f21b3479ae8 RCX=ffffffff844b1bdd RDX=1ffff11002de3fce RSI=ffffffffffffffff RDI=00007f21b3479ae8 RBP=dffffc0000000000 RSP=ffff888016f1fd68 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff888016f1fe70 R14=ffffffffffffffff R15=1ffff11002de3faf RIP=ffffffff814c02f8 RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21b2ec5900 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=00007f21b3479ae8 CR3=000000000d8da000 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=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 info registers vcpu 1 RAX=00000000dead4ead RBX=ffffffff85616740 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85616744 RBP=1ffff1100d9e13b7 RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000246 R13=ffff88806cf3a2d0 R14=0000000000000200 R15=ffff88806cf3a2d2 RIP=ffffffff812e004a 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 00007fd6724cb900 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=00007fd67193bf70 CR3=000000000cc00000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8a03da5ad10634fa00000000000ae988 XMM05=05307164ad1e02af0000000000133528 XMM06=4fda316b135da52b0000000000131840 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000