[ 24.152076] BUG: Bad rss-counter state mm:00000000c75cd595 type:MM_FILEPAGES val:33 [ 24.152912] BUG: Bad rss-counter state mm:00000000c75cd595 type:MM_ANONPAGES val:22 [ 24.262976] ================================================================== [ 24.263726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.264529] Read of size 8 at addr ffff88801c08b228 by task sshd/219 [ 24.265163] [ 24.265357] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.266044] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.266923] Call Trace: [ 24.267181] [ 24.267411] dump_stack_lvl+0x91/0xf0 [ 24.267813] print_report+0xcc/0x620 [ 24.268223] ? __virt_addr_valid+0x102/0x340 [ 24.268680] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.269185] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.269688] kasan_report+0xbe/0xf0 [ 24.270073] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.270581] vma_interval_tree_remove+0xc75/0xec0 [ 24.271067] vma_prepare+0xc54/0x11a0 [ 24.271461] __split_vma+0x5af/0x950 [ 24.271844] ? __pfx___split_vma+0x10/0x10 [ 24.272296] ? find_held_lock+0x2c/0x110 [ 24.272724] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.273145] ? lock_is_held_type+0x9f/0x120 [ 24.273516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.273928] ? mtree_range_walk+0x632/0x900 [ 24.274309] ? mas_walk+0x5c7/0x7c0 [ 24.274633] do_vmi_munmap+0x1f1/0x2b0 [ 24.274974] mmap_region+0x1f9/0x2660 [ 24.275306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.275662] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.276161] ? __pfx_lock_acquire+0x10/0x10 [ 24.276531] ? __pfx_mmap_region+0x10/0x10 [ 24.276893] ? security_mmap_addr+0x7d/0xa0 [ 24.277260] ? get_unmapped_area+0x1f5/0x3f0 [ 24.277636] do_mmap+0x854/0xf00 [ 24.277933] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.278279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.278666] ksys_mmap_pgoff+0x3af/0x500 [ 24.279020] do_syscall_64+0x3f/0x90 [ 24.279357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.279807] RIP: 0033:0x7f5a49e13d82 [ 24.280145] 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 [ 24.281623] RSP: 002b:00007ffda93d91f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.282250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a49e13d82 [ 24.282837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a4924d000 [ 24.283417] RBP: 00007f5a4924d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.284024] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a91a2c1ec0 [ 24.284609] R13: 00007ffda93d9210 R14: 00007ffda93d9240 R15: 00007ffda93d95a0 [ 24.285202] [ 24.285405] [ 24.285553] Allocated by task 208: [ 24.285848] kasan_save_stack+0x22/0x50 [ 24.286194] kasan_set_track+0x25/0x30 [ 24.286533] __kasan_slab_alloc+0x59/0x70 [ 24.286895] kmem_cache_alloc+0x16b/0x370 [ 24.287249] vm_area_dup+0x20/0x160 [ 24.287564] __split_vma+0x170/0x950 [ 24.287893] split_vma+0xc6/0x110 [ 24.288196] mprotect_fixup+0x8d2/0xb30 [ 24.288541] do_mprotect_pkey+0x87e/0xd40 [ 24.288902] __x64_sys_mprotect+0x78/0xc0 [ 24.289259] do_syscall_64+0x3f/0x90 [ 24.289588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.290018] [ 24.290139] Freed by task 13: [ 24.290355] kasan_save_stack+0x22/0x50 [ 24.290641] kasan_set_track+0x25/0x30 [ 24.290924] kasan_save_free_info+0x2b/0x50 [ 24.291228] __kasan_slab_free+0x10a/0x190 [ 24.291539] kmem_cache_free+0x10d/0x4d0 [ 24.291832] rcu_core+0x8c8/0x2860 [ 24.292104] __do_softirq+0x1b7/0x7d4 [ 24.292385] [ 24.292507] Last potentially related work creation: [ 24.292847] kasan_save_stack+0x22/0x50 [ 24.293133] __kasan_record_aux_stack+0x8e/0xa0 [ 24.293470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.293840] remove_vma+0x139/0x170 [ 24.294107] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.294431] do_vmi_munmap+0x1f1/0x2b0 [ 24.294713] __vm_munmap+0x138/0x3a0 [ 24.294978] __x64_sys_munmap+0x59/0x80 [ 24.295262] do_syscall_64+0x3f/0x90 [ 24.295535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.295909] [ 24.296036] The buggy address belongs to the object at ffff88801c08b1d0 [ 24.296036] which belongs to the cache vm_area_struct of size 168 [ 24.296883] The buggy address is located 88 bytes inside of [ 24.296883] freed 168-byte region [ffff88801c08b1d0, ffff88801c08b278) [ 24.297686] [ 24.297807] The buggy address belongs to the physical page: [ 24.298189] page:000000006b01a5f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c08b [ 24.298812] memcg:ffff88800ebb2801 [ 24.299056] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.299425] page_type: 0xffffffff() [ 24.299679] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.300220] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebb2801 [ 24.300737] page dumped because: kasan: bad access detected [ 24.301113] [ 24.301236] Memory state around the buggy address: [ 24.301567] ffff88801c08b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.302061] ffff88801c08b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.302554] >ffff88801c08b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.303038] ^ [ 24.303352] ffff88801c08b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.303833] ffff88801c08b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.304320] ================================================================== [ 24.304861] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.992043] BUG: Bad rss-counter state mm:00000000679d0370 type:MM_FILEPAGES val:33 [ 26.993327] BUG: Bad rss-counter state mm:00000000679d0370 type:MM_ANONPAGES val:22 [ 27.412506] BUG: Bad rss-counter state mm:000000000542874c type:MM_FILEPAGES val:33 [ 27.413544] BUG: Bad rss-counter state mm:000000000542874c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49685' (ECDSA) to the list of known hosts. 2023/06/21 08:49:59 fuzzer started 2023/06/21 08:50:00 dialing manager at localhost:36067 2023/06/21 08:50:00 checking machine... 2023/06/21 08:50:00 checking revisions... [ 28.170938] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:50:00 testing simple program... [ 28.215517] cgroup: Unknown subsys name 'net' [ 28.273956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:49:59 Registers: info registers vcpu 0 RAX=ffffed10031e4e95 RBX=ffffed10031e4e96 RCX=ffffffff8452c9da RDX=0000000000000001 RSI=0000000000000008 RDI=ffff888018f274a8 RBP=ffffed10031e4e95 RSP=ffff88800ebdfcf8 R8 =0000000000000001 R9 =ffffed10031e4e95 R10=ffff888018f274af R11=00000000000b6a61 R12=ffff888018f274a8 R13=ffff888018f27320 R14=0000000000000000 R15=ffff888018f273c0 RIP=ffffffff8180f0a4 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 00007fb22fc39900 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=00007fb2301f0618 CR3=000000001a942000 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=563412feff00545000000000000080fe 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=dffffc0000000000 RBX=ffff88806cf09b60 RCX=ffffffff864b3801 RDX=0000000000000000 RSI=ffffffff81288ac5 RDI=ffff88806cf09b6c RBP=000000000000000c RSP=ffff88806cf09a78 R8 =ffffffff864b381e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800f263a00 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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=00007f0b2057c020 CR3=000000000f0a6000 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=868053ce9657d3957d4dbe2552f7d43b XMM02=000000000011c960ec2efd57dc4c00df XMM03=0000000000121ab8106dd4a3f9013202 XMM04=cbeb0610c99b40c800000000000ae988 XMM05=dfcdbad4f1609c370000000000132118 XMM06=98c21f49dce20b7900000000001312d0 XMM07=e042d86d42eb936e0000000000122758 XMM08=106dd4a3f9013202000000000011c9c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000