syzkaller login: [ 30.332756] BUG: Bad rss-counter state mm:0000000022f94ec6 type:MM_FILEPAGES val:33 [ 30.333950] BUG: Bad rss-counter state mm:0000000022f94ec6 type:MM_ANONPAGES val:22 [ 30.482353] ================================================================== [ 30.483249] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.484192] Read of size 8 at addr ffff888016b96ed8 by task sshd/219 [ 30.485005] [ 30.485244] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.486111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.487091] Call Trace: [ 30.487423] [ 30.487712] dump_stack_lvl+0x91/0xf0 [ 30.488215] print_report+0xcc/0x620 [ 30.488700] ? __virt_addr_valid+0x102/0x340 [ 30.489255] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.489881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.490508] kasan_report+0xbe/0xf0 [ 30.490988] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.491617] vma_interval_tree_remove+0xc75/0xec0 [ 30.492258] vma_prepare+0xc54/0x11a0 [ 30.492766] __split_vma+0x5af/0x950 [ 30.493268] ? __pfx___split_vma+0x10/0x10 [ 30.493814] ? find_held_lock+0x2c/0x110 [ 30.494361] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.494956] ? lock_is_held_type+0x9f/0x120 [ 30.495525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.496151] ? mtree_range_walk+0x632/0x900 [ 30.496757] ? mas_walk+0x5c7/0x7c0 [ 30.497261] do_vmi_munmap+0x1f1/0x2b0 [ 30.497773] mmap_region+0x1f9/0x2660 [ 30.498272] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.498811] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.499566] ? __pfx_lock_acquire+0x10/0x10 [ 30.500120] ? __pfx_mmap_region+0x10/0x10 [ 30.500691] ? security_mmap_addr+0x7d/0xa0 [ 30.501250] ? get_unmapped_area+0x1f5/0x3f0 [ 30.501836] do_mmap+0x854/0xf00 [ 30.502291] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.502818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.503409] ksys_mmap_pgoff+0x3af/0x500 [ 30.503946] do_syscall_64+0x3f/0x90 [ 30.504462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.505144] RIP: 0033:0x7f99abea7d82 [ 30.505621] 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 [ 30.507880] RSP: 002b:00007ffc0f3d4aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.508855] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99abea7d82 [ 30.509756] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99ab2e1000 [ 30.510650] RBP: 00007f99ab2e1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.511540] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613e629df70 [ 30.512449] R13: 00007ffc0f3d4ac0 R14: 00007ffc0f3d4af0 R15: 00007ffc0f3d4e50 [ 30.513352] [ 30.513668] [ 30.513895] Allocated by task 212: [ 30.514349] kasan_save_stack+0x22/0x50 [ 30.514872] kasan_set_track+0x25/0x30 [ 30.515397] __kasan_slab_alloc+0x59/0x70 [ 30.515943] kmem_cache_alloc+0x16b/0x370 [ 30.516499] vm_area_dup+0x20/0x160 [ 30.516969] __split_vma+0x170/0x950 [ 30.517459] split_vma+0xc6/0x110 [ 30.517908] mprotect_fixup+0x8d2/0xb30 [ 30.518443] do_mprotect_pkey+0x87e/0xd40 [ 30.518988] __x64_sys_mprotect+0x78/0xc0 [ 30.519537] do_syscall_64+0x3f/0x90 [ 30.520040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.520718] [ 30.520943] Freed by task 13: [ 30.521352] kasan_save_stack+0x22/0x50 [ 30.521882] kasan_set_track+0x25/0x30 [ 30.522392] kasan_save_free_info+0x2b/0x50 [ 30.522954] __kasan_slab_free+0x10a/0x190 [ 30.523510] kmem_cache_free+0x10d/0x4d0 [ 30.524044] rcu_core+0x8c8/0x2860 [ 30.524521] __do_softirq+0x1b7/0x7d4 [ 30.525038] [ 30.525263] Last potentially related work creation: [ 30.525879] kasan_save_stack+0x22/0x50 [ 30.526403] __kasan_record_aux_stack+0x8e/0xa0 [ 30.526995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.527682] remove_vma+0x139/0x170 [ 30.528158] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.528753] do_vmi_munmap+0x1f1/0x2b0 [ 30.529274] __vm_munmap+0x138/0x3a0 [ 30.529761] __x64_sys_munmap+0x59/0x80 [ 30.530277] do_syscall_64+0x3f/0x90 [ 30.530783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.531455] [ 30.531677] The buggy address belongs to the object at ffff888016b96e80 [ 30.531677] which belongs to the cache vm_area_struct of size 168 [ 30.533234] The buggy address is located 88 bytes inside of [ 30.533234] freed 168-byte region [ffff888016b96e80, ffff888016b96f28) [ 30.534720] [ 30.534952] The buggy address belongs to the physical page: [ 30.535646] page:000000005c658b79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b96 [ 30.536818] memcg:ffff888019e0c201 [ 30.537275] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.537949] page_type: 0xffffffff() [ 30.538421] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.539390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e0c201 [ 30.540354] page dumped because: kasan: bad access detected [ 30.541043] [ 30.541270] Memory state around the buggy address: [ 30.541889] ffff888016b96d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.542791] ffff888016b96e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.543682] >ffff888016b96e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.544606] ^ [ 30.545387] ffff888016b96f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.546281] ffff888016b96f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.547180] ================================================================== [ 30.548373] Disabling lock debugging due to kernel taint [ 32.481524] BUG: Bad rss-counter state mm:000000005904e662 type:MM_FILEPAGES val:33 [ 32.482538] BUG: Bad rss-counter state mm:000000005904e662 type:MM_ANONPAGES val:22 [ 32.970445] BUG: Bad rss-counter state mm:000000001c348800 type:MM_FILEPAGES val:33 [ 32.971420] BUG: Bad rss-counter state mm:000000001c348800 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55491' (ECDSA) to the list of known hosts. 2023/06/20 20:49:24 fuzzer started 2023/06/20 20:49:25 dialing manager at localhost:36067 2023/06/20 20:49:25 checking machine... 2023/06/20 20:49:25 checking revisions... [ 33.684828] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:49:25 testing simple program... [ 33.737096] cgroup: Unknown subsys name 'net' [ 33.811545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:49:24 Registers: info registers vcpu 0 RAX=ffffffff85408001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407f01 RSI=ffffffff85407f00 RDI=ffff88806ce09aa8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff864bd7f0 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f08 R15=ffff88806ce09a98 RIP=ffffffff811304d5 RFL=00000282 [--S----] 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=00007f1344dea1d0 CR3=000000000cfce000 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=bdb79b1cb19e82898c44b3d96ae20630 XMM02=000000000011d9b0ec2efd57dc4c00df XMM03=00000000001220988d6c076a070d4701 XMM04=a52a024b6bb1dfd800000000000ae988 XMM05=dfcdbad4f1609c370000000000131f78 XMM06=806171799158d9670000000000131e00 XMM07=e042d86d42eb936e0000000000122318 XMM08=8d6c076a070d4701000000000011da10 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800f1d1b40 RSI=ffffffff844a8f9a RDI=0000000000000005 RBP=ffff88800e71fc00 RSP=ffff888016eefb18 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=ffff888016eefe88 R15=ffff888016eefe70 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 00007fa432c7f900 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=00007fa432c5e020 CR3=000000001bbb8000 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