[ 30.992408] BUG: Bad rss-counter state mm:00000000bffa0f67 type:MM_FILEPAGES val:33 [ 30.993830] BUG: Bad rss-counter state mm:00000000bffa0f67 type:MM_ANONPAGES val:22 [ 31.137675] ================================================================== [ 31.138569] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.139533] Read of size 8 at addr ffff888019405df0 by task sshd/218 [ 31.140298] [ 31.140520] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.141511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.142482] Call Trace: [ 31.142811] [ 31.143117] dump_stack_lvl+0x91/0xf0 [ 31.143623] print_report+0xcc/0x620 [ 31.144128] ? __virt_addr_valid+0x102/0x340 [ 31.144685] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145303] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145942] kasan_report+0xbe/0xf0 [ 31.146419] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.147057] vma_interval_tree_remove+0xc75/0xec0 [ 31.147658] vma_prepare+0xc54/0x11a0 [ 31.148147] __split_vma+0x5af/0x950 [ 31.148620] ? __pfx___split_vma+0x10/0x10 [ 31.149157] ? find_held_lock+0x2c/0x110 [ 31.149693] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.150269] ? lock_is_held_type+0x9f/0x120 [ 31.150866] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.151528] ? mtree_range_walk+0x632/0x900 [ 31.152086] ? mas_walk+0x5c7/0x7c0 [ 31.152569] do_vmi_munmap+0x1f1/0x2b0 [ 31.153059] mmap_region+0x1f9/0x2660 [ 31.153552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.154075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.154794] ? __pfx_lock_acquire+0x10/0x10 [ 31.155338] ? __pfx_mmap_region+0x10/0x10 [ 31.155867] ? security_mmap_addr+0x7d/0xa0 [ 31.156410] ? get_unmapped_area+0x1f5/0x3f0 [ 31.156960] do_mmap+0x854/0xf00 [ 31.157404] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.157899] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.158479] ksys_mmap_pgoff+0x3af/0x500 [ 31.158997] do_syscall_64+0x3f/0x90 [ 31.159477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160115] RIP: 0033:0x7f41e89a0d82 [ 31.160566] 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 [ 31.162693] RSP: 002b:00007fff037ae778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.163635] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f41e89a0d82 [ 31.164509] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41e7dda000 [ 31.165354] RBP: 00007f41e7dda000 R08: 0000000000000009 R09: 0000000000001000 [ 31.166198] R10: 0000000000000812 R11: 0000000000000206 R12: 000055991e499b20 [ 31.167050] R13: 00007fff037ae790 R14: 00007fff037ae7c0 R15: 00007fff037aeb20 [ 31.167899] [ 31.168194] [ 31.168414] Allocated by task 210: [ 31.168845] kasan_save_stack+0x22/0x50 [ 31.169347] kasan_set_track+0x25/0x30 [ 31.169842] __kasan_slab_alloc+0x59/0x70 [ 31.170371] kmem_cache_alloc+0x16b/0x370 [ 31.170902] vm_area_dup+0x20/0x160 [ 31.171357] __split_vma+0x170/0x950 [ 31.171828] split_vma+0xc6/0x110 [ 31.172269] mprotect_fixup+0x8d2/0xb30 [ 31.172774] do_mprotect_pkey+0x87e/0xd40 [ 31.173292] __x64_sys_mprotect+0x78/0xc0 [ 31.173819] do_syscall_64+0x3f/0x90 [ 31.174297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.174958] [ 31.175177] Freed by task 210: [ 31.175577] kasan_save_stack+0x22/0x50 [ 31.176085] kasan_set_track+0x25/0x30 [ 31.176588] kasan_save_free_info+0x2b/0x50 [ 31.177122] __kasan_slab_free+0x10a/0x190 [ 31.177657] kmem_cache_free+0x10d/0x4d0 [ 31.178173] rcu_core+0x8c8/0x2860 [ 31.178611] __do_softirq+0x1b7/0x7d4 [ 31.179104] [ 31.179322] Last potentially related work creation: [ 31.179919] kasan_save_stack+0x22/0x50 [ 31.180430] __kasan_record_aux_stack+0x8e/0xa0 [ 31.181010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.181701] remove_vma+0x139/0x170 [ 31.182170] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.182736] do_vmi_munmap+0x1f1/0x2b0 [ 31.183237] __vm_munmap+0x138/0x3a0 [ 31.183713] __x64_sys_munmap+0x59/0x80 [ 31.184217] do_syscall_64+0x3f/0x90 [ 31.184691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185342] [ 31.185561] The buggy address belongs to the object at ffff888019405d98 [ 31.185561] which belongs to the cache vm_area_struct of size 168 [ 31.187070] The buggy address is located 88 bytes inside of [ 31.187070] freed 168-byte region [ffff888019405d98, ffff888019405e40) [ 31.188512] [ 31.188724] The buggy address belongs to the physical page: [ 31.189395] page:00000000257e63f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19405 [ 31.190497] memcg:ffff88800eedaa01 [ 31.190943] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.191593] page_type: 0xffffffff() [ 31.192057] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.192992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eedaa01 [ 31.193896] page dumped because: kasan: bad access detected [ 31.194556] [ 31.194779] Memory state around the buggy address: [ 31.195379] ffff888019405c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.196236] ffff888019405d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.197093] >ffff888019405d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.197947] ^ [ 31.198773] ffff888019405e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.199655] ffff888019405e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.200517] ================================================================== [ 31.201475] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.811712] BUG: Bad rss-counter state mm:00000000ac276e62 type:MM_FILEPAGES val:33 [ 33.812843] BUG: Bad rss-counter state mm:00000000ac276e62 type:MM_ANONPAGES val:22 [ 34.169555] BUG: Bad rss-counter state mm:00000000a9eea16b type:MM_FILEPAGES val:33 [ 34.170573] BUG: Bad rss-counter state mm:00000000a9eea16b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37704' (ECDSA) to the list of known hosts. 2023/06/21 04:06:55 fuzzer started 2023/06/21 04:06:56 dialing manager at localhost:36067 2023/06/21 04:06:56 checking machine... 2023/06/21 04:06:56 checking revisions... [ 34.940311] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:06:56 testing simple program... [ 34.990182] cgroup: Unknown subsys name 'net' [ 35.059384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:06:55 Registers: info registers vcpu 0 RAX=00007fc9a32d8720 RBX=000055873f8ab428 RCX=000055873f8a9010 RDX=00007fc9a32d8720 RSI=0000000000000000 RDI=000055873f8ab428 RBP=000055873f8ab428 RSP=00007ffca9c4b120 R8 =0000000000000000 R9 =ffffffffffffff01 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007fc9a32d8720 R14=00007ffca9c4b120 R15=00000000fffffffe RIP=00007fc9a35637a6 RFL=00000202 [-------] 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 00007fc9a2a83900 00000000 00000000 GS =0000 0000000000000000 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=000055bccfa7a748 CR3=000000000b990000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6d7e4a2631b201ab00000000000ae988 XMM05=cd7d438bb02a62e000000000001322d8 XMM06=4a222662dc1884930000000000131010 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffc08370e58 CR3=0000000005482000 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=00007f593382351000005572ee1db790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000