[ 23.833109] BUG: Bad rss-counter state mm:0000000033c6c395 type:MM_FILEPAGES val:33 [ 23.834093] BUG: Bad rss-counter state mm:0000000033c6c395 type:MM_ANONPAGES val:22 [ 23.956251] ================================================================== [ 23.956914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.957584] Read of size 8 at addr ffff88801326e140 by task sshd/220 [ 23.958125] [ 23.958280] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.958893] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.959580] Call Trace: [ 23.959805] [ 23.960006] dump_stack_lvl+0x91/0xf0 [ 23.960485] print_report+0xcc/0x620 [ 23.960873] ? __virt_addr_valid+0x102/0x340 [ 23.961295] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.961729] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.962162] kasan_report+0xbe/0xf0 [ 23.962502] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.962961] vma_interval_tree_remove+0xc75/0xec0 [ 23.963305] vma_prepare+0xc54/0x11a0 [ 23.963550] __split_vma+0x5af/0x950 [ 23.963791] ? __pfx___split_vma+0x10/0x10 [ 23.964062] ? find_held_lock+0x2c/0x110 [ 23.964328] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.964617] ? lock_is_held_type+0x9f/0x120 [ 23.964913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.965230] ? mtree_range_walk+0x632/0x900 [ 23.965515] ? mas_walk+0x5c7/0x7c0 [ 23.965762] do_vmi_munmap+0x1f1/0x2b0 [ 23.966015] mmap_region+0x1f9/0x2660 [ 23.966265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.966533] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.966904] ? __pfx_lock_acquire+0x10/0x10 [ 23.967179] ? __pfx_mmap_region+0x10/0x10 [ 23.967453] ? security_mmap_addr+0x7d/0xa0 [ 23.967728] ? get_unmapped_area+0x1f5/0x3f0 [ 23.968012] do_mmap+0x854/0xf00 [ 23.968244] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.968501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.968792] ksys_mmap_pgoff+0x3af/0x500 [ 23.969065] do_syscall_64+0x3f/0x90 [ 23.969314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.969651] RIP: 0033:0x7f941cb6bd82 [ 23.969888] 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 [ 23.970975] RSP: 002b:00007ffd557675f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.971439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f941cb6bd82 [ 23.971871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f941bfa5000 [ 23.972309] RBP: 00007f941bfa5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.972741] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587aa945ec0 [ 23.973207] R13: 00007ffd55767610 R14: 00007ffd55767640 R15: 00007ffd557679a0 [ 23.973648] [ 23.973797] [ 23.973909] Allocated by task 211: [ 23.974129] kasan_save_stack+0x22/0x50 [ 23.974392] kasan_set_track+0x25/0x30 [ 23.974648] __kasan_slab_alloc+0x59/0x70 [ 23.974917] kmem_cache_alloc+0x16b/0x370 [ 23.975182] vm_area_dup+0x20/0x160 [ 23.975417] __split_vma+0x170/0x950 [ 23.975658] split_vma+0xc6/0x110 [ 23.975884] mprotect_fixup+0x8d2/0xb30 [ 23.976142] do_mprotect_pkey+0x87e/0xd40 [ 23.976413] __x64_sys_mprotect+0x78/0xc0 [ 23.976682] do_syscall_64+0x3f/0x90 [ 23.976940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.977269] [ 23.977380] Freed by task 210: [ 23.977583] kasan_save_stack+0x22/0x50 [ 23.977843] kasan_set_track+0x25/0x30 [ 23.978097] kasan_save_free_info+0x2b/0x50 [ 23.978370] __kasan_slab_free+0x10a/0x190 [ 23.978647] kmem_cache_free+0x10d/0x4d0 [ 23.978908] rcu_core+0x8c8/0x2860 [ 23.979138] __do_softirq+0x1b7/0x7d4 [ 23.979383] [ 23.979494] Last potentially related work creation: [ 23.979794] kasan_save_stack+0x22/0x50 [ 23.980053] __kasan_record_aux_stack+0x8e/0xa0 [ 23.980348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.980678] remove_vma+0x139/0x170 [ 23.980921] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.981211] do_vmi_munmap+0x1f1/0x2b0 [ 23.981462] __vm_munmap+0x138/0x3a0 [ 23.981704] __x64_sys_munmap+0x59/0x80 [ 23.981962] do_syscall_64+0x3f/0x90 [ 23.982206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.982538] [ 23.982649] The buggy address belongs to the object at ffff88801326e0e8 [ 23.982649] which belongs to the cache vm_area_struct of size 168 [ 23.983403] The buggy address is located 88 bytes inside of [ 23.983403] freed 168-byte region [ffff88801326e0e8, ffff88801326e190) [ 23.984120] [ 23.984231] The buggy address belongs to the physical page: [ 23.984568] page:00000000401b02a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1326e [ 23.985147] memcg:ffff88800ca1ae01 [ 23.985367] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.985701] page_type: 0xffffffff() [ 23.985935] raw: 0100000000000200 ffff8880087a0c80 ffffea0000560340 000000000000000a [ 23.986403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca1ae01 [ 23.986867] page dumped because: kasan: bad access detected [ 23.987207] [ 23.987319] Memory state around the buggy address: [ 23.987621] ffff88801326e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.988056] ffff88801326e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 23.988493] >ffff88801326e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.988937] ^ [ 23.989265] ffff88801326e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.989707] ffff88801326e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.990147] ================================================================== [ 23.990655] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.831115] BUG: Bad rss-counter state mm:00000000226b3de2 type:MM_FILEPAGES val:33 [ 25.832368] BUG: Bad rss-counter state mm:00000000226b3de2 type:MM_ANONPAGES val:22 [ 26.284436] BUG: Bad rss-counter state mm:00000000dd74e95a type:MM_FILEPAGES val:33 [ 26.285338] BUG: Bad rss-counter state mm:00000000dd74e95a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60329' (ECDSA) to the list of known hosts. 2023/06/21 00:49:16 fuzzer started 2023/06/21 00:49:17 dialing manager at localhost:36067 2023/06/21 00:49:17 checking machine... 2023/06/21 00:49:17 checking revisions... [ 27.039162] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:49:17 testing simple program... [ 27.083761] cgroup: Unknown subsys name 'net' [ 27.146115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:49:16 Registers: info registers vcpu 0 RAX=ffffffff85d3e490 RBX=00000000000061c0 RCX=ffffffff81363cba RDX=0000000000000004 RSI=ffff88806ce3a2c0 RDI=ffffffff85616740 RBP=ffff88806ce3a2c0 RSP=ffff888016ba7d18 R8 =0000000000000000 R9 =ffffffff85616780 R10=ffff88806ce3a2d2 R11=1ffff1100d9c7479 R12=ffffffff85616740 R13=00000000000061bc R14=ffff88806ce3a2d4 R15=0000000000000000 RIP=ffffffff8135c187 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff2712f6900 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=00007ffffb7e3000 CR3=000000000c592000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f8d28596ad0 CR3=000000000c648000 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=ecd4a0f6d462bc821b47e7e742c91b85 XMM02=000000000011d930eff9b2d0a8fce9cb XMM03=000000000011da002c67c8bc2e329bc3 XMM04=b3f1992727cbaa3e00000000000ae988 XMM05=dfcdbad4f1609c370000000000131150 XMM06=b502057290e8d5390000000000130328 XMM07=e042d86d42eb936e00000000001218b8 XMM08=16685ae5160b587a000000000011da00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000