syzkaller login: [ 31.223183] BUG: Bad rss-counter state mm:00000000b19bc897 type:MM_FILEPAGES val:33 [ 31.224259] BUG: Bad rss-counter state mm:00000000b19bc897 type:MM_ANONPAGES val:22 [ 31.272689] ================================================================== [ 31.273981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.275277] Read of size 8 at addr ffff8880199b66b0 by task sshd/220 [ 31.276419] [ 31.276737] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.277999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.279347] Call Trace: [ 31.279837] [ 31.280232] dump_stack_lvl+0x91/0xf0 [ 31.280917] print_report+0xcc/0x620 [ 31.281646] ? __virt_addr_valid+0x102/0x340 [ 31.282368] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283166] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283981] kasan_report+0xbe/0xf0 [ 31.284716] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285576] vma_interval_tree_remove+0xc75/0xec0 [ 31.286203] vma_prepare+0xc54/0x11a0 [ 31.286710] __split_vma+0x5af/0x950 [ 31.287185] ? __pfx___split_vma+0x10/0x10 [ 31.287742] ? find_held_lock+0x2c/0x110 [ 31.288275] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.288853] ? lock_is_held_type+0x9f/0x120 [ 31.289422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.290034] ? mtree_range_walk+0x632/0x900 [ 31.290616] ? mas_walk+0x5c7/0x7c0 [ 31.291095] do_vmi_munmap+0x1f1/0x2b0 [ 31.291619] mmap_region+0x1f9/0x2660 [ 31.292108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.292637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.293387] ? __pfx_lock_acquire+0x10/0x10 [ 31.293931] ? __pfx_mmap_region+0x10/0x10 [ 31.294487] ? security_mmap_addr+0x7d/0xa0 [ 31.295027] ? get_unmapped_area+0x1f5/0x3f0 [ 31.295620] do_mmap+0x854/0xf00 [ 31.296073] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.296600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.297185] ksys_mmap_pgoff+0x3af/0x500 [ 31.297710] do_syscall_64+0x3f/0x90 [ 31.298190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298872] RIP: 0033:0x7f521dc9bd82 [ 31.299331] 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 [ 31.301510] RSP: 002b:00007ffc43c0f238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.302426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f521dc9bd82 [ 31.303268] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f521d0d5000 [ 31.304149] RBP: 00007f521d0d5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.304997] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571a8020f70 [ 31.305886] R13: 00007ffc43c0f250 R14: 00007ffc43c0f280 R15: 00007ffc43c0f5e0 [ 31.306767] [ 31.307067] [ 31.307285] Allocated by task 213: [ 31.307742] kasan_save_stack+0x22/0x50 [ 31.308255] kasan_set_track+0x25/0x30 [ 31.308771] __kasan_slab_alloc+0x59/0x70 [ 31.309319] kmem_cache_alloc+0x16b/0x370 [ 31.309848] vm_area_dup+0x20/0x160 [ 31.310307] __split_vma+0x170/0x950 [ 31.310787] split_vma+0xc6/0x110 [ 31.311235] mprotect_fixup+0x8d2/0xb30 [ 31.311767] do_mprotect_pkey+0x87e/0xd40 [ 31.312287] __x64_sys_mprotect+0x78/0xc0 [ 31.312830] do_syscall_64+0x3f/0x90 [ 31.313330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314173] [ 31.314403] Freed by task 213: [ 31.314798] kasan_save_stack+0x22/0x50 [ 31.315302] kasan_set_track+0x25/0x30 [ 31.315823] kasan_save_free_info+0x2b/0x50 [ 31.316355] __kasan_slab_free+0x10a/0x190 [ 31.316916] kmem_cache_free+0x10d/0x4d0 [ 31.317459] rcu_core+0x8c8/0x2860 [ 31.317910] __do_softirq+0x1b7/0x7d4 [ 31.318416] [ 31.318639] Last potentially related work creation: [ 31.319227] kasan_save_stack+0x22/0x50 [ 31.319773] __kasan_record_aux_stack+0x8e/0xa0 [ 31.320357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.321036] remove_vma+0x139/0x170 [ 31.321519] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.322087] do_vmi_munmap+0x1f1/0x2b0 [ 31.322602] __vm_munmap+0x138/0x3a0 [ 31.323078] __x64_sys_munmap+0x59/0x80 [ 31.323616] do_syscall_64+0x3f/0x90 [ 31.324114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.324800] [ 31.325045] The buggy address belongs to the object at ffff8880199b6658 [ 31.325045] which belongs to the cache vm_area_struct of size 168 [ 31.326623] The buggy address is located 88 bytes inside of [ 31.326623] freed 168-byte region [ffff8880199b6658, ffff8880199b6700) [ 31.328130] [ 31.328370] The buggy address belongs to the physical page: [ 31.329109] page:000000004ae60250 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199b6 [ 31.330273] memcg:ffff88800f45b401 [ 31.330741] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.331453] page_type: 0xffffffff() [ 31.331930] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.332897] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f45b401 [ 31.333879] page dumped because: kasan: bad access detected [ 31.334600] [ 31.334824] Memory state around the buggy address: [ 31.335457] ffff8880199b6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.336372] ffff8880199b6600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.337315] >ffff8880199b6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.338216] ^ [ 31.338849] ffff8880199b6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.339782] ffff8880199b6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.340711] ================================================================== [ 31.341769] Disabling lock debugging due to kernel taint [ 33.583221] BUG: Bad rss-counter state mm:000000005a9f7681 type:MM_FILEPAGES val:33 [ 33.584387] BUG: Bad rss-counter state mm:000000005a9f7681 type:MM_ANONPAGES val:22 [ 33.974703] BUG: Bad rss-counter state mm:00000000cdf75cd9 type:MM_FILEPAGES val:33 [ 33.975869] BUG: Bad rss-counter state mm:00000000cdf75cd9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59732' (ECDSA) to the list of known hosts. 2023/06/20 17:25:30 fuzzer started 2023/06/20 17:25:31 dialing manager at localhost:36067 2023/06/20 17:25:31 checking machine... 2023/06/20 17:25:31 checking revisions... [ 34.673833] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:25:31 testing simple program... [ 34.716795] cgroup: Unknown subsys name 'net' [ 34.774316] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:25:30 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff846000aa RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800db68000 R15=ffff88800dddbec0 RIP=ffffffff813ad470 RFL=00000286 [--S--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 00007f3b78d25700 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=00007ffc498684b8 CR3=000000000f0f6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030333a3532 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323731 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff8180ca59 RDX=dffffc0000000000 RSI=00000000000080ca RDI=ffff88800e3ff548 RBP=ffff88800e3ff5a0 RSP=ffff88800e3ff4d8 R8 =ffffffff86139748 R9 =ffff88800e3ff588 R10=0000000000038001 R11=0000000000020f03 R12=ffff88800e3ff5a8 R13=ffff88800e3ff590 R14=ffff88800e3ff589 R15=ffff88800e3ff548 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007f0e6442b900 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=00007f0e649e2618 CR3=000000000fde8000 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=563412feff00545000000000000080fe 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