[ 24.154764] BUG: Bad rss-counter state mm:000000005df7ec37 type:MM_FILEPAGES val:33 [ 24.155888] BUG: Bad rss-counter state mm:000000005df7ec37 type:MM_ANONPAGES val:22 [ 24.194057] ================================================================== [ 24.195137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.196186] Read of size 8 at addr ffff8880196a5ed8 by task sshd/218 [ 24.197078] [ 24.197305] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.198368] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.199489] Call Trace: [ 24.199850] [ 24.200159] dump_stack_lvl+0x91/0xf0 [ 24.200745] print_report+0xcc/0x620 [ 24.201330] ? __virt_addr_valid+0x102/0x340 [ 24.201999] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.202719] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.203444] kasan_report+0xbe/0xf0 [ 24.203986] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.204651] vma_interval_tree_remove+0xc75/0xec0 [ 24.205332] vma_prepare+0xc54/0x11a0 [ 24.205811] __split_vma+0x5af/0x950 [ 24.206281] ? __pfx___split_vma+0x10/0x10 [ 24.206821] ? find_held_lock+0x2c/0x110 [ 24.207342] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.208024] ? lock_is_held_type+0x9f/0x120 [ 24.208623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.209232] ? mtree_range_walk+0x632/0x900 [ 24.209856] ? mas_walk+0x5c7/0x7c0 [ 24.210415] do_vmi_munmap+0x1f1/0x2b0 [ 24.210990] mmap_region+0x1f9/0x2660 [ 24.211470] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.212099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.212805] ? __pfx_lock_acquire+0x10/0x10 [ 24.213425] ? __pfx_mmap_region+0x10/0x10 [ 24.214055] ? security_mmap_addr+0x7d/0xa0 [ 24.214730] ? get_unmapped_area+0x1f5/0x3f0 [ 24.215331] do_mmap+0x854/0xf00 [ 24.215771] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.216274] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.216841] ksys_mmap_pgoff+0x3af/0x500 [ 24.217346] do_syscall_64+0x3f/0x90 [ 24.217829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.218482] RIP: 0033:0x7f572e6ded82 [ 24.218951] 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 [ 24.221076] RSP: 002b:00007ffec3d7c768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.221975] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f572e6ded82 [ 24.222840] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f572db18000 [ 24.223694] RBP: 00007f572db18000 R08: 0000000000000009 R09: 0000000000001000 [ 24.224548] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d188939b20 [ 24.225390] R13: 00007ffec3d7c780 R14: 00007ffec3d7c7b0 R15: 00007ffec3d7cb10 [ 24.226246] [ 24.226544] [ 24.226761] Allocated by task 211: [ 24.227189] kasan_save_stack+0x22/0x50 [ 24.227693] kasan_set_track+0x25/0x30 [ 24.228186] __kasan_slab_alloc+0x59/0x70 [ 24.228706] kmem_cache_alloc+0x16b/0x370 [ 24.229223] vm_area_dup+0x20/0x160 [ 24.229678] __split_vma+0x170/0x950 [ 24.230147] split_vma+0xc6/0x110 [ 24.230601] mprotect_fixup+0x8d2/0xb30 [ 24.231108] do_mprotect_pkey+0x87e/0xd40 [ 24.231640] __x64_sys_mprotect+0x78/0xc0 [ 24.232160] do_syscall_64+0x3f/0x90 [ 24.232641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.233299] [ 24.233515] Freed by task 211: [ 24.233910] kasan_save_stack+0x22/0x50 [ 24.234417] kasan_set_track+0x25/0x30 [ 24.234943] kasan_save_free_info+0x2b/0x50 [ 24.235495] __kasan_slab_free+0x10a/0x190 [ 24.236035] kmem_cache_free+0x10d/0x4d0 [ 24.236557] rcu_core+0x8c8/0x2860 [ 24.237006] __do_softirq+0x1b7/0x7d4 [ 24.237510] [ 24.237733] Last potentially related work creation: [ 24.238338] kasan_save_stack+0x22/0x50 [ 24.238861] __kasan_record_aux_stack+0x8e/0xa0 [ 24.239452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.240101] remove_vma+0x139/0x170 [ 24.240563] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.241134] do_vmi_munmap+0x1f1/0x2b0 [ 24.241633] __vm_munmap+0x138/0x3a0 [ 24.242114] __x64_sys_munmap+0x59/0x80 [ 24.242646] do_syscall_64+0x3f/0x90 [ 24.243137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.243797] [ 24.244018] The buggy address belongs to the object at ffff8880196a5e80 [ 24.244018] which belongs to the cache vm_area_struct of size 168 [ 24.245524] The buggy address is located 88 bytes inside of [ 24.245524] freed 168-byte region [ffff8880196a5e80, ffff8880196a5f28) [ 24.246985] [ 24.247208] The buggy address belongs to the physical page: [ 24.247883] page:00000000040f2ba8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196a5 [ 24.249001] memcg:ffff8880194d9401 [ 24.249432] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.250148] page_type: 0xffffffff() [ 24.250633] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f2900 0000000000000007 [ 24.251580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880194d9401 [ 24.252517] page dumped because: kasan: bad access detected [ 24.253203] [ 24.253424] Memory state around the buggy address: [ 24.254018] ffff8880196a5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.254901] ffff8880196a5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.255788] >ffff8880196a5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.256671] ^ [ 24.257413] ffff8880196a5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.258298] ffff8880196a5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.259190] ================================================================== [ 24.260353] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.265167] BUG: Bad rss-counter state mm:00000000977b55df type:MM_FILEPAGES val:33 [ 26.266360] BUG: Bad rss-counter state mm:00000000977b55df type:MM_ANONPAGES val:22 [ 26.643728] BUG: Bad rss-counter state mm:00000000cf3dd5b4 type:MM_FILEPAGES val:33 [ 26.644896] BUG: Bad rss-counter state mm:00000000cf3dd5b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43497' (ECDSA) to the list of known hosts. 2023/06/20 10:57:31 fuzzer started 2023/06/20 10:57:31 dialing manager at localhost:36067 2023/06/20 10:57:31 checking machine... 2023/06/20 10:57:31 checking revisions... [ 27.367790] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:57:31 testing simple program... [ 27.417002] cgroup: Unknown subsys name 'net' [ 27.459566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:57:30 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff110018b7f20 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800c5bf8e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce361a0 R15=0000000000000000 RIP=ffffffff8135b930 RFL=00000047 [---Z-PC] 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 00007f1e5aa30900 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=00007ffe10cfb000 CR3=00000000197fe000 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=ffff888008c04400 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=00007f22dd46ffa0 CR3=000000000c7ce000 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=dd02c8b51096f286de445181ee3cbe1b XMM02=2c67c8bc2e329bc3000000000011a070 XMM03=fb795ef6d65770560000000000120ec0 XMM04=db3e62339de8200f00000000000ae988 XMM05=751b9502027dc0b90000000000130a78 XMM06=c58d8dbc983659d8000000000012fc50 XMM07=e042d86d42eb936e0000000000121140 XMM08=eed16b8542e79dc5000000000011a0d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000