[ 29.019712] BUG: Bad rss-counter state mm:000000005d478060 type:MM_FILEPAGES val:33 [ 29.021127] BUG: Bad rss-counter state mm:000000005d478060 type:MM_ANONPAGES val:22 [ 29.169406] ================================================================== [ 29.170506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.171679] Read of size 8 at addr ffff88800c4d9df0 by task sshd/219 [ 29.172605] [ 29.172838] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.173748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.174764] Call Trace: [ 29.175095] [ 29.175388] dump_stack_lvl+0x91/0xf0 [ 29.175917] print_report+0xcc/0x620 [ 29.176409] ? __virt_addr_valid+0x102/0x340 [ 29.176985] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.177629] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.178285] kasan_report+0xbe/0xf0 [ 29.178780] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.179404] vma_interval_tree_remove+0xc75/0xec0 [ 29.180046] vma_prepare+0xc54/0x11a0 [ 29.180537] __split_vma+0x5af/0x950 [ 29.181033] ? __pfx___split_vma+0x10/0x10 [ 29.181591] ? find_held_lock+0x2c/0x110 [ 29.182140] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.182726] ? lock_is_held_type+0x9f/0x120 [ 29.183273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.183917] ? mtree_range_walk+0x632/0x900 [ 29.184479] ? mas_walk+0x5c7/0x7c0 [ 29.184982] do_vmi_munmap+0x1f1/0x2b0 [ 29.185490] mmap_region+0x1f9/0x2660 [ 29.186007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.186528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.187274] ? __pfx_lock_acquire+0x10/0x10 [ 29.187849] ? __pfx_mmap_region+0x10/0x10 [ 29.188402] ? security_mmap_addr+0x7d/0xa0 [ 29.188970] ? get_unmapped_area+0x1f5/0x3f0 [ 29.189549] do_mmap+0x854/0xf00 [ 29.190039] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.190537] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.191130] ksys_mmap_pgoff+0x3af/0x500 [ 29.191684] do_syscall_64+0x3f/0x90 [ 29.192174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.192853] RIP: 0033:0x7f93080cad82 [ 29.193324] 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 [ 29.195572] RSP: 002b:00007ffc5ed3fb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.196559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93080cad82 [ 29.197471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9307504000 [ 29.198402] RBP: 00007f9307504000 R08: 0000000000000009 R09: 0000000000001000 [ 29.199304] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555eac73bd90 [ 29.200232] R13: 00007ffc5ed3fb80 R14: 00007ffc5ed3fbb0 R15: 00007ffc5ed3ff10 [ 29.201163] [ 29.201474] [ 29.201718] Allocated by task 212: [ 29.202198] kasan_save_stack+0x22/0x50 [ 29.202754] kasan_set_track+0x25/0x30 [ 29.203281] __kasan_slab_alloc+0x59/0x70 [ 29.203862] kmem_cache_alloc+0x16b/0x370 [ 29.204408] vm_area_dup+0x20/0x160 [ 29.204910] __split_vma+0x170/0x950 [ 29.205407] split_vma+0xc6/0x110 [ 29.205912] mprotect_fixup+0x8d2/0xb30 [ 29.206451] do_mprotect_pkey+0x87e/0xd40 [ 29.207020] __x64_sys_mprotect+0x78/0xc0 [ 29.207596] do_syscall_64+0x3f/0x90 [ 29.208114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.208810] [ 29.209037] Freed by task 203: [ 29.209456] kasan_save_stack+0x22/0x50 [ 29.210025] kasan_set_track+0x25/0x30 [ 29.210548] kasan_save_free_info+0x2b/0x50 [ 29.211117] __kasan_slab_free+0x10a/0x190 [ 29.211719] kmem_cache_free+0x10d/0x4d0 [ 29.212261] rcu_core+0x8c8/0x2860 [ 29.212804] __do_softirq+0x1b7/0x7d4 [ 29.213423] [ 29.213671] Last potentially related work creation: [ 29.214315] kasan_save_stack+0x22/0x50 [ 29.214856] __kasan_record_aux_stack+0x8e/0xa0 [ 29.215470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.216165] remove_vma+0x139/0x170 [ 29.216669] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.217249] do_vmi_munmap+0x1f1/0x2b0 [ 29.217775] __vm_munmap+0x138/0x3a0 [ 29.218293] __x64_sys_munmap+0x59/0x80 [ 29.218840] do_syscall_64+0x3f/0x90 [ 29.219336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.220039] [ 29.220264] The buggy address belongs to the object at ffff88800c4d9d98 [ 29.220264] which belongs to the cache vm_area_struct of size 168 [ 29.221875] The buggy address is located 88 bytes inside of [ 29.221875] freed 168-byte region [ffff88800c4d9d98, ffff88800c4d9e40) [ 29.223384] [ 29.223635] The buggy address belongs to the physical page: [ 29.224338] page:000000008bcbf58d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4d9 [ 29.225513] memcg:ffff88800edb0901 [ 29.225996] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.226700] page_type: 0xffffffff() [ 29.227176] raw: 0100000000000200 ffff88800879fc80 ffffea0000328400 dead000000000006 [ 29.228178] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edb0901 [ 29.229153] page dumped because: kasan: bad access detected [ 29.229895] [ 29.230122] Memory state around the buggy address: [ 29.230756] ffff88800c4d9c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.231696] ffff88800c4d9d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.232643] >ffff88800c4d9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.233579] ^ [ 29.234456] ffff88800c4d9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.235368] ffff88800c4d9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.236295] ================================================================== [ 29.237319] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.411363] BUG: Bad rss-counter state mm:000000008a7543c3 type:MM_FILEPAGES val:33 [ 31.412675] BUG: Bad rss-counter state mm:000000008a7543c3 type:MM_ANONPAGES val:22 [ 31.904517] BUG: Bad rss-counter state mm:00000000c0405e2e type:MM_FILEPAGES val:33 [ 31.905965] BUG: Bad rss-counter state mm:00000000c0405e2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50474' (ECDSA) to the list of known hosts. 2023/06/19 11:49:31 fuzzer started 2023/06/19 11:49:32 dialing manager at localhost:44161 2023/06/19 11:49:32 checking machine... 2023/06/19 11:49:32 checking revisions... [ 32.681051] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:49:32 testing simple program... [ 32.730512] cgroup: Unknown subsys name 'net' [ 32.810951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:49:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800d75f818 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007f10c60da900 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=00007f10c556e9e8 CR3=000000000d740000 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=4a8551cb8010afd000000000000ae988 XMM05=867eb56ef1abdfd40000000000134b08 XMM06=806171799158d9670000000000133588 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88800e407000 RCX=0000000000000000 RDX=ffff888009490000 RSI=ffffffff8449b565 RDI=0000000000000007 RBP=0000000000000024 RSP=ffff88800f1e7aa0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=ffff88800e406e18 R13=ffff88800f1e7e88 R14=0000000000000003 R15=ffff88800f1e7e70 RIP=ffffffff814c0800 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 00007fb3dedc3900 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=00007fb3ded88008 CR3=00000000146ca000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000