syzkaller login: [ 30.393106] BUG: Bad rss-counter state mm:000000007abfded6 type:MM_FILEPAGES val:33 [ 30.393814] BUG: Bad rss-counter state mm:000000007abfded6 type:MM_ANONPAGES val:22 [ 30.518249] ================================================================== [ 30.518927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.519607] Read of size 8 at addr ffff888018603058 by task sshd/220 [ 30.520135] [ 30.520282] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.520846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.521461] Call Trace: [ 30.521691] [ 30.521902] dump_stack_lvl+0x91/0xf0 [ 30.522267] print_report+0xcc/0x620 [ 30.522792] ? __virt_addr_valid+0x102/0x340 [ 30.523178] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.523625] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.524016] kasan_report+0xbe/0xf0 [ 30.524335] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.524746] vma_interval_tree_remove+0xc75/0xec0 [ 30.525118] vma_prepare+0xc54/0x11a0 [ 30.525422] __split_vma+0x5af/0x950 [ 30.525745] ? __pfx___split_vma+0x10/0x10 [ 30.526089] ? find_held_lock+0x2c/0x110 [ 30.526415] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.526793] ? lock_is_held_type+0x9f/0x120 [ 30.527163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.527624] ? mtree_range_walk+0x632/0x900 [ 30.527981] ? mas_walk+0x5c7/0x7c0 [ 30.528338] do_vmi_munmap+0x1f1/0x2b0 [ 30.528691] mmap_region+0x1f9/0x2660 [ 30.529041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.529400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.529896] ? __pfx_lock_acquire+0x10/0x10 [ 30.530259] ? __pfx_mmap_region+0x10/0x10 [ 30.530611] ? security_mmap_addr+0x7d/0xa0 [ 30.530979] ? get_unmapped_area+0x1f5/0x3f0 [ 30.531401] do_mmap+0x854/0xf00 [ 30.531758] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.532147] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.532506] ksys_mmap_pgoff+0x3af/0x500 [ 30.532882] do_syscall_64+0x3f/0x90 [ 30.533233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.533654] RIP: 0033:0x7fd97021ad82 [ 30.534014] 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 [ 30.535469] RSP: 002b:00007ffc796bd3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.536102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd97021ad82 [ 30.536666] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd96f654000 [ 30.537248] RBP: 00007fd96f654000 R08: 0000000000000009 R09: 0000000000001000 [ 30.537857] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0f3cd6ec0 [ 30.538449] R13: 00007ffc796bd3f0 R14: 00007ffc796bd420 R15: 00007ffc796bd780 [ 30.539090] [ 30.539344] [ 30.539493] Allocated by task 213: [ 30.539786] kasan_save_stack+0x22/0x50 [ 30.540144] kasan_set_track+0x25/0x30 [ 30.540489] __kasan_slab_alloc+0x59/0x70 [ 30.540863] kmem_cache_alloc+0x16b/0x370 [ 30.541236] vm_area_dup+0x20/0x160 [ 30.541557] __split_vma+0x170/0x950 [ 30.541886] split_vma+0xc6/0x110 [ 30.542193] mprotect_fixup+0x8d2/0xb30 [ 30.542549] do_mprotect_pkey+0x87e/0xd40 [ 30.542917] __x64_sys_mprotect+0x78/0xc0 [ 30.543313] do_syscall_64+0x3f/0x90 [ 30.543647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.544109] [ 30.544260] Freed by task 203: [ 30.544534] kasan_save_stack+0x22/0x50 [ 30.544887] kasan_set_track+0x25/0x30 [ 30.545245] kasan_save_free_info+0x2b/0x50 [ 30.545618] __kasan_slab_free+0x10a/0x190 [ 30.545997] kmem_cache_free+0x10d/0x4d0 [ 30.546351] rcu_core+0x8c8/0x2860 [ 30.546625] __do_softirq+0x1b7/0x7d4 [ 30.546942] [ 30.547115] Last potentially related work creation: [ 30.547570] kasan_save_stack+0x22/0x50 [ 30.547960] __kasan_record_aux_stack+0x8e/0xa0 [ 30.548356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.548797] remove_vma+0x139/0x170 [ 30.549148] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.549532] do_vmi_munmap+0x1f1/0x2b0 [ 30.549877] __vm_munmap+0x138/0x3a0 [ 30.550199] __x64_sys_munmap+0x59/0x80 [ 30.550539] do_syscall_64+0x3f/0x90 [ 30.550903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.551388] [ 30.551541] The buggy address belongs to the object at ffff888018603000 [ 30.551541] which belongs to the cache vm_area_struct of size 168 [ 30.552577] The buggy address is located 88 bytes inside of [ 30.552577] freed 168-byte region [ffff888018603000, ffff8880186030a8) [ 30.553552] [ 30.553705] The buggy address belongs to the physical page: [ 30.554187] page:0000000016282fdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18603 [ 30.554964] memcg:ffff888016844c01 [ 30.555321] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.555771] page_type: 0xffffffff() [ 30.556105] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.556756] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016844c01 [ 30.557392] page dumped because: kasan: bad access detected [ 30.557809] [ 30.557960] Memory state around the buggy address: [ 30.558374] ffff888018602f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.558980] ffff888018602f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.559614] >ffff888018603000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.560219] ^ [ 30.560732] ffff888018603080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.561339] ffff888018603100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.561920] ================================================================== [ 30.562650] Disabling lock debugging due to kernel taint [ 32.416328] BUG: Bad rss-counter state mm:0000000028c6c0f4 type:MM_FILEPAGES val:33 [ 32.416986] BUG: Bad rss-counter state mm:0000000028c6c0f4 type:MM_ANONPAGES val:22 [ 32.782452] BUG: Bad rss-counter state mm:0000000081f7ade8 type:MM_FILEPAGES val:33 [ 32.783356] BUG: Bad rss-counter state mm:0000000081f7ade8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8313' (ECDSA) to the list of known hosts. 2023/06/21 09:52:31 fuzzer started 2023/06/21 09:52:31 dialing manager at localhost:36067 2023/06/21 09:52:31 checking machine... 2023/06/21 09:52:31 checking revisions... [ 33.370050] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:52:31 testing simple program... [ 33.412072] cgroup: Unknown subsys name 'net' [ 33.447111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:52:31 Registers: info registers vcpu 0 RAX=ffffffff81132d45 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff888008d9f870 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000206 [-----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 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=00007ff02535cac0 CR3=0000000016a9a000 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=2030333a32353a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a32353a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007fb1a0f13008 RBX=00007fb1a0f12e40 RCX=0000000000000002 RDX=00007fb1a14f9878 RSI=0000000000000002 RDI=00007fb1a0f13008 RBP=00007ffd5f105070 RSP=00007ffd5f105070 R8 =000055eb488230d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=000055eb48842f70 R13=0000000000000021 R14=0000000000000020 R15=0000000000000000 RIP=00007fb1a0f100d8 RFL=00010246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb1a0f44900 00000000 00000000 GS =0000 0000000000000000 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=00007fb1a0f13008 CR3=00000000094cc000 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