syzkaller login: [ 30.693626] BUG: Bad rss-counter state mm:0000000016c93ee2 type:MM_FILEPAGES val:33 [ 30.694621] BUG: Bad rss-counter state mm:0000000016c93ee2 type:MM_ANONPAGES val:22 [ 30.865461] ================================================================== [ 30.866681] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.868083] Read of size 8 at addr ffff88800dfa2d08 by task sshd/219 [ 30.869116] [ 30.869404] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.870577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.871637] Call Trace: [ 30.871963] <TASK> [ 30.872256] dump_stack_lvl+0x91/0xf0 [ 30.872762] print_report+0xcc/0x620 [ 30.873262] ? __virt_addr_valid+0x102/0x340 [ 30.873829] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874465] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875107] kasan_report+0xbe/0xf0 [ 30.875600] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876231] vma_interval_tree_remove+0xc75/0xec0 [ 30.876853] vma_prepare+0xc54/0x11a0 [ 30.877340] __split_vma+0x5af/0x950 [ 30.877822] ? __pfx___split_vma+0x10/0x10 [ 30.878357] ? find_held_lock+0x2c/0x110 [ 30.878891] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.879487] ? lock_is_held_type+0x9f/0x120 [ 30.880043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.880662] ? mtree_range_walk+0x632/0x900 [ 30.881225] ? mas_walk+0x5c7/0x7c0 [ 30.881716] do_vmi_munmap+0x1f1/0x2b0 [ 30.882215] mmap_region+0x1f9/0x2660 [ 30.882712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.883232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.883979] ? __pfx_lock_acquire+0x10/0x10 [ 30.884517] ? __pfx_mmap_region+0x10/0x10 [ 30.885060] ? security_mmap_addr+0x7d/0xa0 [ 30.885598] ? get_unmapped_area+0x1f5/0x3f0 [ 30.886159] do_mmap+0x854/0xf00 [ 30.886607] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.887114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.887692] ksys_mmap_pgoff+0x3af/0x500 [ 30.888205] do_syscall_64+0x3f/0x90 [ 30.888690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889346] RIP: 0033:0x7fe3fa008d82 [ 30.889808] 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 [ 30.891990] RSP: 002b:00007ffc679c3c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.892892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3fa008d82 [ 30.893744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3f9442000 [ 30.894610] RBP: 00007fe3f9442000 R08: 0000000000000009 R09: 0000000000001000 [ 30.895468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2b648cd90 [ 30.896322] R13: 00007ffc679c3c90 R14: 00007ffc679c3cc0 R15: 00007ffc679c4020 [ 30.897185] </TASK> [ 30.897483] [ 30.897706] Allocated by task 212: [ 30.898136] kasan_save_stack+0x22/0x50 [ 30.898643] kasan_set_track+0x25/0x30 [ 30.899137] __kasan_slab_alloc+0x59/0x70 [ 30.899684] kmem_cache_alloc+0x16b/0x370 [ 30.900201] vm_area_dup+0x20/0x160 [ 30.900658] __split_vma+0x170/0x950 [ 30.901129] split_vma+0xc6/0x110 [ 30.901579] mprotect_fixup+0x8d2/0xb30 [ 30.902087] do_mprotect_pkey+0x87e/0xd40 [ 30.902607] __x64_sys_mprotect+0x78/0xc0 [ 30.903132] do_syscall_64+0x3f/0x90 [ 30.903620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904265] [ 30.904483] Freed by task 19: [ 30.904867] kasan_save_stack+0x22/0x50 [ 30.905377] kasan_set_track+0x25/0x30 [ 30.905877] kasan_save_free_info+0x2b/0x50 [ 30.906419] __kasan_slab_free+0x10a/0x190 [ 30.906948] kmem_cache_free+0x10d/0x4d0 [ 30.907462] rcu_core+0x8c8/0x2860 [ 30.907917] __do_softirq+0x1b7/0x7d4 [ 30.908405] [ 30.908626] Last potentially related work creation: [ 30.909275] kasan_save_stack+0x22/0x50 [ 30.909790] __kasan_record_aux_stack+0x8e/0xa0 [ 30.910358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.911004] remove_vma+0x139/0x170 [ 30.911474] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.912039] do_vmi_munmap+0x1f1/0x2b0 [ 30.912526] __vm_munmap+0x138/0x3a0 [ 30.912992] __x64_sys_munmap+0x59/0x80 [ 30.913481] do_syscall_64+0x3f/0x90 [ 30.913950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914590] [ 30.914803] The buggy address belongs to the object at ffff88800dfa2cb0 [ 30.914803] which belongs to the cache vm_area_struct of size 168 [ 30.916277] The buggy address is located 88 bytes inside of [ 30.916277] freed 168-byte region [ffff88800dfa2cb0, ffff88800dfa2d58) [ 30.917669] [ 30.917880] The buggy address belongs to the physical page: [ 30.918528] page:000000009ff2757d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfa2 [ 30.919631] memcg:ffff88800ed06101 [ 30.920062] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.920725] page_type: 0xffffffff() [ 30.921173] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.922094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed06101 [ 30.922991] page dumped because: kasan: bad access detected [ 30.923660] [ 30.923874] Memory state around the buggy address: [ 30.924530] ffff88800dfa2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.925501] ffff88800dfa2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.926480] >ffff88800dfa2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.927494] ^ [ 30.927997] ffff88800dfa2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.928979] ffff88800dfa2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.929962] ================================================================== [ 30.931038] Disabling lock debugging due to kernel taint [ 32.837101] BUG: Bad rss-counter state mm:00000000a4e6b40a type:MM_FILEPAGES val:33 [ 32.837940] BUG: Bad rss-counter state mm:00000000a4e6b40a type:MM_ANONPAGES val:22 [ 33.282333] BUG: Bad rss-counter state mm:0000000098250d95 type:MM_FILEPAGES val:33 [ 33.283796] BUG: Bad rss-counter state mm:0000000098250d95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38433' (ECDSA) to the list of known hosts. 2023/06/20 18:51:15 fuzzer started 2023/06/20 18:51:15 dialing manager at localhost:36067 2023/06/20 18:51:15 checking machine... 2023/06/20 18:51:15 checking revisions... [ 34.022153] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:51:15 testing simple program... [ 34.075517] cgroup: Unknown subsys name 'net' [ 34.115090] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff888019e89b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016f1f4e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800d8184c0 RIP=ffffffff814c02c5 RFL=00000293 [--S-A-C] 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 00007f0aa226e900 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=00007ffc3638d000 CR3=0000000016e66000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019716ec0 RCX=0000000000000000 RDX=ffff888009500000 RSI=ffffffff844f54ba RDI=0000000000000007 RBP=ffff88800950f1a0 RSP=ffff88800950f0c8 R8 =0000000000000007 R9 =0000000000000000 R10=e000000000000000 R11=0000000000000128 R12=dffffc0000000000 R13=000000000000003d R14=000000000000003d R15=e000000000000000 RIP=ffffffff814c089b 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 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=00007f041fc01200 CR3=000000000d6a6000 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=7a78b0206dcccda6154f6059e9c21828 XMM02=ec2efd57dc4c00df000000000011abd8 XMM03=6bb20b36208bc76e000000000011aca8 XMM04=71c2040378cc29d700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131ed8 XMM06=c233ab086fcb76500000000000130d40 XMM07=e042d86d42eb936e00000000001223a0 XMM08=6bb20b36208bc76e000000000011aca8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000