[ 30.348698] BUG: Bad rss-counter state mm:000000009404cc1e type:MM_FILEPAGES val:33 [ 30.350160] BUG: Bad rss-counter state mm:000000009404cc1e type:MM_ANONPAGES val:22 [ 30.508435] ================================================================== [ 30.509359] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.510287] Read of size 8 at addr ffff88800e8c3798 by task sshd/218 [ 30.511063] [ 30.511385] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.512262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.513282] Call Trace: [ 30.513609] [ 30.513896] dump_stack_lvl+0x91/0xf0 [ 30.514388] print_report+0xcc/0x620 [ 30.514867] ? __virt_addr_valid+0x102/0x340 [ 30.515416] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.516036] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.516666] kasan_report+0xbe/0xf0 [ 30.517148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.517789] vma_interval_tree_remove+0xc75/0xec0 [ 30.518387] vma_prepare+0xc54/0x11a0 [ 30.518882] __split_vma+0x5af/0x950 [ 30.519350] ? __pfx___split_vma+0x10/0x10 [ 30.519882] ? find_held_lock+0x2c/0x110 [ 30.520397] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.520979] ? lock_is_held_type+0x9f/0x120 [ 30.521518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.522131] ? mtree_range_walk+0x632/0x900 [ 30.522685] ? mas_walk+0x5c7/0x7c0 [ 30.523159] do_vmi_munmap+0x1f1/0x2b0 [ 30.523653] mmap_region+0x1f9/0x2660 [ 30.524132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.524666] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.525384] ? __pfx_lock_acquire+0x10/0x10 [ 30.525910] ? __pfx_mmap_region+0x10/0x10 [ 30.526441] ? security_mmap_addr+0x7d/0xa0 [ 30.526968] ? get_unmapped_area+0x1f5/0x3f0 [ 30.527516] do_mmap+0x854/0xf00 [ 30.527954] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.528444] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.529006] ksys_mmap_pgoff+0x3af/0x500 [ 30.529507] do_syscall_64+0x3f/0x90 [ 30.529982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.530627] RIP: 0033:0x7f02f2113d82 [ 30.531083] 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 [ 30.533205] RSP: 002b:00007ffc758d59b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.534108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02f2113d82 [ 30.534953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02f154d000 [ 30.535791] RBP: 00007f02f154d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.536663] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557f6cbeec0 [ 30.537503] R13: 00007ffc758d59d0 R14: 00007ffc758d5a00 R15: 00007ffc758d5d60 [ 30.538352] [ 30.538639] [ 30.538852] Allocated by task 211: [ 30.539279] kasan_save_stack+0x22/0x50 [ 30.539799] kasan_set_track+0x25/0x30 [ 30.540290] __kasan_slab_alloc+0x59/0x70 [ 30.540828] kmem_cache_alloc+0x16b/0x370 [ 30.541346] vm_area_dup+0x20/0x160 [ 30.541798] __split_vma+0x170/0x950 [ 30.542265] split_vma+0xc6/0x110 [ 30.542711] mprotect_fixup+0x8d2/0xb30 [ 30.543211] do_mprotect_pkey+0x87e/0xd40 [ 30.543730] __x64_sys_mprotect+0x78/0xc0 [ 30.544265] do_syscall_64+0x3f/0x90 [ 30.544750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.545408] [ 30.545620] Freed by task 19: [ 30.546008] kasan_save_stack+0x22/0x50 [ 30.546522] kasan_set_track+0x25/0x30 [ 30.547017] kasan_save_free_info+0x2b/0x50 [ 30.547552] __kasan_slab_free+0x10a/0x190 [ 30.548094] kmem_cache_free+0x10d/0x4d0 [ 30.548598] rcu_core+0x8c8/0x2860 [ 30.549069] __do_softirq+0x1b7/0x7d4 [ 30.549553] [ 30.549774] Last potentially related work creation: [ 30.550358] kasan_save_stack+0x22/0x50 [ 30.550871] __kasan_record_aux_stack+0x8e/0xa0 [ 30.551448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.552094] remove_vma+0x139/0x170 [ 30.552541] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.553102] do_vmi_munmap+0x1f1/0x2b0 [ 30.553584] __vm_munmap+0x138/0x3a0 [ 30.554055] __x64_sys_munmap+0x59/0x80 [ 30.554554] do_syscall_64+0x3f/0x90 [ 30.555024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.555657] [ 30.555873] The buggy address belongs to the object at ffff88800e8c3740 [ 30.555873] which belongs to the cache vm_area_struct of size 168 [ 30.557342] The buggy address is located 88 bytes inside of [ 30.557342] freed 168-byte region [ffff88800e8c3740, ffff88800e8c37e8) [ 30.558735] [ 30.558952] The buggy address belongs to the physical page: [ 30.559601] page:00000000ae8809ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8c3 [ 30.560684] memcg:ffff888009409301 [ 30.561110] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.561754] page_type: 0xffffffff() [ 30.562210] raw: 0100000000000200 ffff88800879fc80 ffffea00003bdd00 dead000000000006 [ 30.563121] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009409301 [ 30.564015] page dumped because: kasan: bad access detected [ 30.564688] [ 30.564902] Memory state around the buggy address: [ 30.565483] ffff88800e8c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.566347] ffff88800e8c3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.567206] >ffff88800e8c3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.568067] ^ [ 30.568560] ffff88800e8c3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.569434] ffff88800e8c3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.570273] ================================================================== [ 30.571236] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.581717] BUG: Bad rss-counter state mm:0000000092a652ad type:MM_FILEPAGES val:33 [ 32.582881] BUG: Bad rss-counter state mm:0000000092a652ad type:MM_ANONPAGES val:22 [ 33.015945] BUG: Bad rss-counter state mm:00000000eea28c7a type:MM_FILEPAGES val:33 [ 33.017137] BUG: Bad rss-counter state mm:00000000eea28c7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19640' (ECDSA) to the list of known hosts. 2023/06/20 02:11:08 fuzzer started 2023/06/20 02:11:08 dialing manager at localhost:44161 2023/06/20 02:11:08 checking machine... 2023/06/20 02:11:08 checking revisions... [ 33.774722] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:11:09 testing simple program... [ 33.827131] cgroup: Unknown subsys name 'net' [ 33.871415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f207bb0 RCX=0000000000000000 RDX=ffff8880167351c0 RSI=ffffffff8369cb51 RDI=0000000000000005 RBP=ffff888017f71000 RSP=ffff88800f2079f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888017f711b8 R14=0000000000000042 R15=0000000000000042 RIP=ffffffff814c081b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9da546d900 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=00007ffcf79e2000 CR3=000000000b8a2000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f17c3952370 CR3=000000000da60000 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=07f3cc7de0f9eca68c460da3d4b241b8 XMM02=2c67c8bc2e329bc3000000000011c528 XMM03=fb795ef6d65770560000000000122fa8 XMM04=3c4d32b0d7ef45ea00000000000ae988 XMM05=42b5130f1d1877770000000000133c58 XMM06=bdf2e299e47b49d50000000000132988 XMM07=e042d86d42eb936e0000000000123228 XMM08=6f13dc3ac1bd499c000000000011c588 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000