[ 24.050550] BUG: Bad rss-counter state mm:00000000c840c7af type:MM_FILEPAGES val:31 [ 24.051973] BUG: Bad rss-counter state mm:00000000c840c7af type:MM_ANONPAGES val:22 [ 24.175805] ================================================================== [ 24.176457] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.177112] Read of size 8 at addr ffff888018085d08 by task sshd/220 [ 24.177656] [ 24.177813] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.178525] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.179224] Call Trace: [ 24.179453] [ 24.179655] dump_stack_lvl+0x91/0xf0 [ 24.180002] print_report+0xcc/0x620 [ 24.180362] ? __virt_addr_valid+0x102/0x340 [ 24.180758] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.181201] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.181643] kasan_report+0xbe/0xf0 [ 24.182012] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.182456] vma_interval_tree_remove+0xc75/0xec0 [ 24.182904] vma_prepare+0xc54/0x11a0 [ 24.183243] __split_vma+0x5af/0x950 [ 24.183576] ? __pfx___split_vma+0x10/0x10 [ 24.183948] ? find_held_lock+0x2c/0x110 [ 24.184313] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.184711] ? lock_is_held_type+0x9f/0x120 [ 24.185091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.185518] ? mtree_range_walk+0x632/0x900 [ 24.185906] ? mas_walk+0x5c7/0x7c0 [ 24.186242] do_vmi_munmap+0x1f1/0x2b0 [ 24.186589] mmap_region+0x1f9/0x2660 [ 24.186937] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.187295] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.187794] ? __pfx_lock_acquire+0x10/0x10 [ 24.188168] ? __pfx_mmap_region+0x10/0x10 [ 24.188539] ? security_mmap_addr+0x7d/0xa0 [ 24.188912] ? get_unmapped_area+0x1f5/0x3f0 [ 24.189296] do_mmap+0x854/0xf00 [ 24.189605] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.189952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.190343] ksys_mmap_pgoff+0x3af/0x500 [ 24.190707] do_syscall_64+0x3f/0x90 [ 24.191043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.191495] RIP: 0033:0x7f95d82a5d82 [ 24.191816] 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 [ 24.193296] RSP: 002b:00007ffd6af72968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.193929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95d82a5d82 [ 24.194524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95d76df000 [ 24.195130] RBP: 00007f95d76df000 R08: 0000000000000009 R09: 0000000000001000 [ 24.195728] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc4a392b20 [ 24.196322] R13: 00007ffd6af72980 R14: 00007ffd6af729b0 R15: 00007ffd6af72d10 [ 24.196927] [ 24.197134] [ 24.197286] Allocated by task 212: [ 24.197592] kasan_save_stack+0x22/0x50 [ 24.197946] kasan_set_track+0x25/0x30 [ 24.198288] __kasan_slab_alloc+0x59/0x70 [ 24.198659] kmem_cache_alloc+0x16b/0x370 [ 24.199024] vm_area_dup+0x20/0x160 [ 24.199338] __split_vma+0x170/0x950 [ 24.199662] split_vma+0xc6/0x110 [ 24.199969] mprotect_fixup+0x8d2/0xb30 [ 24.200315] do_mprotect_pkey+0x87e/0xd40 [ 24.200675] __x64_sys_mprotect+0x78/0xc0 [ 24.201039] do_syscall_64+0x3f/0x90 [ 24.201368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.201814] [ 24.201966] Freed by task 212: [ 24.202239] kasan_save_stack+0x22/0x50 [ 24.202586] kasan_set_track+0x25/0x30 [ 24.202942] kasan_save_free_info+0x2b/0x50 [ 24.203309] __kasan_slab_free+0x10a/0x190 [ 24.203680] kmem_cache_free+0x10d/0x4d0 [ 24.204033] rcu_core+0x8c8/0x2860 [ 24.204343] __do_softirq+0x1b7/0x7d4 [ 24.204675] [ 24.204826] Last potentially related work creation: [ 24.205229] kasan_save_stack+0x22/0x50 [ 24.205580] __kasan_record_aux_stack+0x8e/0xa0 [ 24.205973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.206419] remove_vma+0x139/0x170 [ 24.206747] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.207134] do_vmi_munmap+0x1f1/0x2b0 [ 24.207472] __vm_munmap+0x138/0x3a0 [ 24.207796] __x64_sys_munmap+0x59/0x80 [ 24.208142] do_syscall_64+0x3f/0x90 [ 24.208469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.208917] [ 24.209066] The buggy address belongs to the object at ffff888018085cb0 [ 24.209066] which belongs to the cache vm_area_struct of size 168 [ 24.210078] The buggy address is located 88 bytes inside of [ 24.210078] freed 168-byte region [ffff888018085cb0, ffff888018085d58) [ 24.211050] [ 24.211200] The buggy address belongs to the physical page: [ 24.211657] page:000000009164a28f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18085 [ 24.212408] memcg:ffff88800ec56201 [ 24.212704] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.213190] page_type: 0xffffffff() [ 24.213504] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395fc0 dead000000000007 [ 24.214142] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec56201 [ 24.214780] page dumped because: kasan: bad access detected [ 24.215234] [ 24.215384] Memory state around the buggy address: [ 24.215789] ffff888018085c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.216372] ffff888018085c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.216958] >ffff888018085d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.217543] ^ [ 24.217844] ffff888018085d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.218430] ffff888018085e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.219022] ================================================================== [ 24.219781] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.013092] BUG: Bad rss-counter state mm:00000000eef97d3f type:MM_FILEPAGES val:33 [ 26.014268] BUG: Bad rss-counter state mm:00000000eef97d3f type:MM_ANONPAGES val:22 [ 26.411117] BUG: Bad rss-counter state mm:00000000bc58beea type:MM_FILEPAGES val:33 [ 26.412152] BUG: Bad rss-counter state mm:00000000bc58beea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44771' (ECDSA) to the list of known hosts. 2023/06/21 07:24:05 fuzzer started 2023/06/21 07:24:05 dialing manager at localhost:36067 2023/06/21 07:24:05 checking machine... 2023/06/21 07:24:05 checking revisions... [ 27.151040] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:24:05 testing simple program... [ 27.205887] cgroup: Unknown subsys name 'net' [ 27.257241] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:24:05 Registers: info registers vcpu 0 RAX=1ffffffff0c0a3e5 RBX=ffffffff86051f28 RCX=ffffffff84537da6 RDX=0000000000000000 RSI=ffffffff864b6d1e RDI=ffffffff86051f28 RBP=ffffffff86051f28 RSP=ffff88806ce099e0 R8 =ffffffff864b6d1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffffffff86051f28 R13=ffffffff86051f28 R14=ffffffff86051f28 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 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=00007f4ce5db1650 CR3=000000000dc7e000 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=2035303a34323a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a34323a3730203132 XMM08=00007f0fd00042500000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fffc44565f0 RCX=00005628acb3b010 RDX=000000000000001d RSI=0000000000000002 RDI=0000000000000000 RBP=0000000000000000 RSP=00007fffc4455a60 R8 =00005628ab121345 R9 =ffffffffffffff01 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007fffc44565f0 R14=0000000000000000 R15=00007fffc4455d00 RIP=00007f9483952681 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9482eb2900 00000000 00000000 GS =0000 0000000000000000 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=00007f94822adbf0 CR3=000000000f290000 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=4685ad647273e5e300000000000ae988 XMM05=69b1ebd3e8dbaa8800000000001328a0 XMM06=19e9129bd510f2350000000000131390 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000