syzkaller login: [ 30.340895] BUG: Bad rss-counter state mm:00000000181ef804 type:MM_FILEPAGES val:33 [ 30.342399] BUG: Bad rss-counter state mm:00000000181ef804 type:MM_ANONPAGES val:22 [ 30.501793] ================================================================== [ 30.502653] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.503554] Read of size 8 at addr ffff888015c5f968 by task sshd/220 [ 30.504328] [ 30.504547] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.505525] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.506511] Call Trace: [ 30.506840] [ 30.507123] dump_stack_lvl+0x91/0xf0 [ 30.507613] print_report+0xcc/0x620 [ 30.508109] ? __virt_addr_valid+0x102/0x340 [ 30.508659] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.509302] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.509937] kasan_report+0xbe/0xf0 [ 30.510412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.511030] vma_interval_tree_remove+0xc75/0xec0 [ 30.511631] vma_prepare+0xc54/0x11a0 [ 30.512107] __split_vma+0x5af/0x950 [ 30.512577] ? __pfx___split_vma+0x10/0x10 [ 30.513106] ? find_held_lock+0x2c/0x110 [ 30.513637] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.514202] ? lock_is_held_type+0x9f/0x120 [ 30.514736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.515337] ? mtree_range_walk+0x632/0x900 [ 30.515889] ? mas_walk+0x5c7/0x7c0 [ 30.516361] do_vmi_munmap+0x1f1/0x2b0 [ 30.516845] mmap_region+0x1f9/0x2660 [ 30.517336] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.517842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.518555] ? __pfx_lock_acquire+0x10/0x10 [ 30.519080] ? __pfx_mmap_region+0x10/0x10 [ 30.519613] ? security_mmap_addr+0x7d/0xa0 [ 30.520151] ? get_unmapped_area+0x1f5/0x3f0 [ 30.520699] do_mmap+0x854/0xf00 [ 30.521133] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.521644] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.522207] ksys_mmap_pgoff+0x3af/0x500 [ 30.522712] do_syscall_64+0x3f/0x90 [ 30.523197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.523839] RIP: 0033:0x7fdf2568bd82 [ 30.524299] 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 [ 30.526410] RSP: 002b:00007ffd592ec378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.527310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf2568bd82 [ 30.528160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf24ac5000 [ 30.529000] RBP: 00007fdf24ac5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.529845] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed440b4b20 [ 30.530690] R13: 00007ffd592ec390 R14: 00007ffd592ec3c0 R15: 00007ffd592ec720 [ 30.531547] [ 30.531836] [ 30.532053] Allocated by task 213: [ 30.532481] kasan_save_stack+0x22/0x50 [ 30.532982] kasan_set_track+0x25/0x30 [ 30.533498] __kasan_slab_alloc+0x59/0x70 [ 30.534019] kmem_cache_alloc+0x16b/0x370 [ 30.534532] vm_area_dup+0x20/0x160 [ 30.534993] __split_vma+0x170/0x950 [ 30.535461] split_vma+0xc6/0x110 [ 30.535900] mprotect_fixup+0x8d2/0xb30 [ 30.536405] do_mprotect_pkey+0x87e/0xd40 [ 30.536921] __x64_sys_mprotect+0x78/0xc0 [ 30.537448] do_syscall_64+0x3f/0x90 [ 30.537922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.538566] [ 30.538780] Freed by task 213: [ 30.539184] kasan_save_stack+0x22/0x50 [ 30.539691] kasan_set_track+0x25/0x30 [ 30.540186] kasan_save_free_info+0x2b/0x50 [ 30.540718] __kasan_slab_free+0x10a/0x190 [ 30.541266] kmem_cache_free+0x10d/0x4d0 [ 30.541769] rcu_core+0x8c8/0x2860 [ 30.542216] __do_softirq+0x1b7/0x7d4 [ 30.542695] [ 30.542909] Last potentially related work creation: [ 30.543494] kasan_save_stack+0x22/0x50 [ 30.544000] __kasan_record_aux_stack+0x8e/0xa0 [ 30.544588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.545242] remove_vma+0x139/0x170 [ 30.545689] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.546263] do_vmi_munmap+0x1f1/0x2b0 [ 30.546764] __vm_munmap+0x138/0x3a0 [ 30.547250] __x64_sys_munmap+0x59/0x80 [ 30.547761] do_syscall_64+0x3f/0x90 [ 30.548262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.548924] [ 30.549144] The buggy address belongs to the object at ffff888015c5f910 [ 30.549144] which belongs to the cache vm_area_struct of size 168 [ 30.550687] The buggy address is located 88 bytes inside of [ 30.550687] freed 168-byte region [ffff888015c5f910, ffff888015c5f9b8) [ 30.552150] [ 30.552372] The buggy address belongs to the physical page: [ 30.553064] page:000000009a15a9ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c5f [ 30.554224] memcg:ffff888016a0dd01 [ 30.554668] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.555346] page_type: 0xffffffff() [ 30.555814] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.556773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a0dd01 [ 30.557729] page dumped because: kasan: bad access detected [ 30.558421] [ 30.558641] Memory state around the buggy address: [ 30.559246] ffff888015c5f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.560143] ffff888015c5f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.561036] >ffff888015c5f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.561943] ^ [ 30.562761] ffff888015c5f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.563654] ffff888015c5fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.564543] ================================================================== [ 30.565660] Disabling lock debugging due to kernel taint [ 32.418048] BUG: Bad rss-counter state mm:00000000b6b68f2b type:MM_FILEPAGES val:33 [ 32.418859] BUG: Bad rss-counter state mm:00000000b6b68f2b type:MM_ANONPAGES val:22 [ 32.864190] BUG: Bad rss-counter state mm:00000000c876fd5c type:MM_FILEPAGES val:33 [ 32.865980] BUG: Bad rss-counter state mm:00000000c876fd5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14807' (ECDSA) to the list of known hosts. 2023/06/21 06:35:28 fuzzer started 2023/06/21 06:35:28 dialing manager at localhost:36067 2023/06/21 06:35:28 checking machine... 2023/06/21 06:35:28 checking revisions... [ 33.634456] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:35:28 testing simple program... [ 33.695805] cgroup: Unknown subsys name 'net' [ 33.734193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:28 Registers: info registers vcpu 0 RAX=0000000067c27ebc RBX=000000000d783b20 RCX=ffff888014307a90 RDX=000000000000000e RSI=0000000000000010 RDI=00000000924f5d68 RBP=ffff888008441500 RSP=ffff8880143079f8 R8 =00000000c9149b22 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff888014307a60 R15=000000000000000e RIP=ffffffff82270461 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 00007fb42515a900 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=00007fb4257120b0 CR3=000000000e5d2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015808000 RSI=ffffffff815a537c RDI=0000000000000006 RBP=ffff88800d8a7d28 RSP=ffff88800d8a7c58 R8 =0000000000000006 R9 =0000000000000101 R10=0000000040000000 R11=0000000000000000 R12=0000000040000000 R13=ffff88800d8a7d60 R14=0000000000000101 R15=ffffc90000659080 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 00007fc2cd72a900 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=00007fc2ccc48000 CR3=00000000141d0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6ec85689e85f48c700000000000ae988 XMM05=df90239346a3576f0000000000132f48 XMM06=4fda316b135da52b0000000000131d38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000