syzkaller login: [ 30.150710] BUG: Bad rss-counter state mm:00000000807212af type:MM_FILEPAGES val:33 [ 30.152756] BUG: Bad rss-counter state mm:00000000807212af type:MM_ANONPAGES val:22 [ 30.273254] ================================================================== [ 30.274323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.275444] Read of size 8 at addr ffff88800b98f6b0 by task sshd/219 [ 30.276462] [ 30.276665] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.277333] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.278090] Call Trace: [ 30.278335] [ 30.278554] dump_stack_lvl+0x91/0xf0 [ 30.278927] print_report+0xcc/0x620 [ 30.279300] ? __virt_addr_valid+0x102/0x340 [ 30.279740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.280207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.280689] kasan_report+0xbe/0xf0 [ 30.281051] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.281530] vma_interval_tree_remove+0xc75/0xec0 [ 30.282001] vma_prepare+0xc54/0x11a0 [ 30.282372] __split_vma+0x5af/0x950 [ 30.282736] ? __pfx___split_vma+0x10/0x10 [ 30.283148] ? find_held_lock+0x2c/0x110 [ 30.283556] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.284010] ? lock_is_held_type+0x9f/0x120 [ 30.284432] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.284904] ? mtree_range_walk+0x632/0x900 [ 30.285328] ? mas_walk+0x5c7/0x7c0 [ 30.285697] do_vmi_munmap+0x1f1/0x2b0 [ 30.286076] mmap_region+0x1f9/0x2660 [ 30.286449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.286846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.287402] ? __pfx_lock_acquire+0x10/0x10 [ 30.287819] ? __pfx_mmap_region+0x10/0x10 [ 30.288231] ? security_mmap_addr+0x7d/0xa0 [ 30.288643] ? get_unmapped_area+0x1f5/0x3f0 [ 30.289069] do_mmap+0x854/0xf00 [ 30.289407] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.289789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.290224] ksys_mmap_pgoff+0x3af/0x500 [ 30.290621] do_syscall_64+0x3f/0x90 [ 30.290991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.291487] RIP: 0033:0x7f7dc5b84d82 [ 30.291860] 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 [ 30.293513] RSP: 002b:00007ffdeb37cb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.294213] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dc5b84d82 [ 30.294867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dc4fbe000 [ 30.295527] RBP: 00007f7dc4fbe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.296203] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8ac0eaec0 [ 30.296870] R13: 00007ffdeb37cb30 R14: 00007ffdeb37cb60 R15: 00007ffdeb37cec0 [ 30.297541] [ 30.297767] [ 30.297935] Allocated by task 212: [ 30.298269] kasan_save_stack+0x22/0x50 [ 30.298657] kasan_set_track+0x25/0x30 [ 30.299038] __kasan_slab_alloc+0x59/0x70 [ 30.299440] kmem_cache_alloc+0x16b/0x370 [ 30.299846] vm_area_dup+0x20/0x160 [ 30.300201] __split_vma+0x170/0x950 [ 30.300561] split_vma+0xc6/0x110 [ 30.300904] mprotect_fixup+0x8d2/0xb30 [ 30.301295] do_mprotect_pkey+0x87e/0xd40 [ 30.301697] __x64_sys_mprotect+0x78/0xc0 [ 30.302098] do_syscall_64+0x3f/0x90 [ 30.302468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.302966] [ 30.303132] Freed by task 212: [ 30.303434] kasan_save_stack+0x22/0x50 [ 30.303832] kasan_set_track+0x25/0x30 [ 30.304209] kasan_save_free_info+0x2b/0x50 [ 30.304621] __kasan_slab_free+0x10a/0x190 [ 30.305033] kmem_cache_free+0x10d/0x4d0 [ 30.305427] rcu_core+0x8c8/0x2860 [ 30.305774] __do_softirq+0x1b7/0x7d4 [ 30.306141] [ 30.306304] Last potentially related work creation: [ 30.306766] kasan_save_stack+0x22/0x50 [ 30.307158] __kasan_record_aux_stack+0x8e/0xa0 [ 30.307604] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.308116] remove_vma+0x139/0x170 [ 30.308466] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.308902] do_vmi_munmap+0x1f1/0x2b0 [ 30.309276] __vm_munmap+0x138/0x3a0 [ 30.309639] __x64_sys_munmap+0x59/0x80 [ 30.310018] do_syscall_64+0x3f/0x90 [ 30.310383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.310894] [ 30.311060] The buggy address belongs to the object at ffff88800b98f658 [ 30.311060] which belongs to the cache vm_area_struct of size 168 [ 30.312212] The buggy address is located 88 bytes inside of [ 30.312212] freed 168-byte region [ffff88800b98f658, ffff88800b98f700) [ 30.313305] [ 30.313472] The buggy address belongs to the physical page: [ 30.313982] page:00000000776a49eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb98f [ 30.314827] memcg:ffff8880168eef01 [ 30.315157] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.315699] page_type: 0xffffffff() [ 30.316045] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.316759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168eef01 [ 30.317457] page dumped because: kasan: bad access detected [ 30.317973] [ 30.318136] Memory state around the buggy address: [ 30.318588] ffff88800b98f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.319249] ffff88800b98f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.319928] >ffff88800b98f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.320583] ^ [ 30.321032] ffff88800b98f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.321694] ffff88800b98f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.322344] ================================================================== [ 30.323354] Disabling lock debugging due to kernel taint [ 32.228631] BUG: Bad rss-counter state mm:000000006db16a20 type:MM_FILEPAGES val:33 [ 32.229742] BUG: Bad rss-counter state mm:000000006db16a20 type:MM_ANONPAGES val:22 [ 32.724413] BUG: Bad rss-counter state mm:0000000029547e12 type:MM_FILEPAGES val:33 [ 32.725625] BUG: Bad rss-counter state mm:0000000029547e12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50453' (ECDSA) to the list of known hosts. 2023/06/21 07:59:03 fuzzer started 2023/06/21 07:59:03 dialing manager at localhost:36067 2023/06/21 07:59:03 checking machine... 2023/06/21 07:59:03 checking revisions... [ 33.451910] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:59:03 testing simple program... [ 33.502889] cgroup: Unknown subsys name 'net' [ 33.539503] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:59:03 Registers: info registers vcpu 0 RAX=ffffffff85d3e490 RBX=0000000000000200 RCX=ffffffff815345ff RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800e9fff58 RSP=ffff88800e9fff10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007f4299130618 R15=0000000000000000 RIP=ffffffff812d1346 RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4298b79900 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=00007f4299130618 CR3=00000000102e2000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fe0c35b0840 CR3=000000000c53c000 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=968f11bdc1d4d6a618402a06f0433fcd XMM02=000000000011b468ec2efd57dc4c00df XMM03=00000000001229406bbfec37b7b835f9 XMM04=bb14c65af93a36c300000000000ae988 XMM05=0acff2b4e9ea589e0000000000133560 XMM06=806171799158d9670000000000132600 XMM07=e042d86d42eb936e0000000000122bc0 XMM08=6bbfec37b7b835f9000000000011b4c8 XMM09=00000000000000000000000000000000 XMM10=20200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000