syzkaller login: [ 41.464488] BUG: Bad rss-counter state mm:0000000075525dd9 type:MM_FILEPAGES val:33 [ 41.465505] BUG: Bad rss-counter state mm:0000000075525dd9 type:MM_ANONPAGES val:22 [ 41.634464] ================================================================== [ 41.635504] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.636537] Read of size 8 at addr ffff88800fbe6798 by task sshd/220 [ 41.637506] [ 41.637850] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.638797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.639872] Call Trace: [ 41.640227] [ 41.640538] dump_stack_lvl+0x91/0xf0 [ 41.641072] print_report+0xcc/0x620 [ 41.641605] ? __virt_addr_valid+0x102/0x340 [ 41.642226] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.642905] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.643577] kasan_report+0xbe/0xf0 [ 41.644096] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.644779] vma_interval_tree_remove+0xc75/0xec0 [ 41.645446] vma_prepare+0xc54/0x11a0 [ 41.645985] __split_vma+0x5af/0x950 [ 41.646503] ? __pfx___split_vma+0x10/0x10 [ 41.647091] ? find_held_lock+0x2c/0x110 [ 41.647668] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.648285] ? lock_is_held_type+0x9f/0x120 [ 41.648874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.649542] ? mtree_range_walk+0x632/0x900 [ 41.650174] ? mas_walk+0x5c7/0x7c0 [ 41.650702] do_vmi_munmap+0x1f1/0x2b0 [ 41.651244] mmap_region+0x1f9/0x2660 [ 41.651772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.652332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.653114] ? __pfx_lock_acquire+0x10/0x10 [ 41.653709] ? __pfx_mmap_region+0x10/0x10 [ 41.654291] ? security_mmap_addr+0x7d/0xa0 [ 41.654876] ? get_unmapped_area+0x1f5/0x3f0 [ 41.655482] do_mmap+0x854/0xf00 [ 41.655962] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.656505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.657120] ksys_mmap_pgoff+0x3af/0x500 [ 41.657686] do_syscall_64+0x3f/0x90 [ 41.658210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.658926] RIP: 0033:0x7f33846bcd82 [ 41.659426] 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 [ 41.661740] RSP: 002b:00007ffe8a070a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.662711] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33846bcd82 [ 41.663613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3383af6000 [ 41.664642] RBP: 00007f3383af6000 R08: 0000000000000009 R09: 0000000000001000 [ 41.665521] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f17cceaf70 [ 41.666408] R13: 00007ffe8a070a30 R14: 00007ffe8a070a60 R15: 00007ffe8a070dc0 [ 41.667302] [ 41.667605] [ 41.667829] Allocated by task 213: [ 41.668272] kasan_save_stack+0x22/0x50 [ 41.668798] kasan_set_track+0x25/0x30 [ 41.669314] __kasan_slab_alloc+0x59/0x70 [ 41.669868] kmem_cache_alloc+0x16b/0x370 [ 41.670408] vm_area_dup+0x20/0x160 [ 41.670892] __split_vma+0x170/0x950 [ 41.671393] split_vma+0xc6/0x110 [ 41.671864] mprotect_fixup+0x8d2/0xb30 [ 41.672399] do_mprotect_pkey+0x87e/0xd40 [ 41.672959] __x64_sys_mprotect+0x78/0xc0 [ 41.673514] do_syscall_64+0x3f/0x90 [ 41.674039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.674723] [ 41.674952] Freed by task 203: [ 41.675374] kasan_save_stack+0x22/0x50 [ 41.675910] kasan_set_track+0x25/0x30 [ 41.676437] kasan_save_free_info+0x2b/0x50 [ 41.677004] __kasan_slab_free+0x10a/0x190 [ 41.677576] kmem_cache_free+0x10d/0x4d0 [ 41.678123] rcu_core+0x8c8/0x2860 [ 41.678598] __do_softirq+0x1b7/0x7d4 [ 41.679193] [ 41.679423] Last potentially related work creation: [ 41.680048] kasan_save_stack+0x22/0x50 [ 41.680572] __kasan_record_aux_stack+0x8e/0xa0 [ 41.681166] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.681853] remove_vma+0x139/0x170 [ 41.682323] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.682913] do_vmi_munmap+0x1f1/0x2b0 [ 41.683425] __vm_munmap+0x138/0x3a0 [ 41.683913] __x64_sys_munmap+0x59/0x80 [ 41.684433] do_syscall_64+0x3f/0x90 [ 41.684923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.685588] [ 41.685818] The buggy address belongs to the object at ffff88800fbe6740 [ 41.685818] which belongs to the cache vm_area_struct of size 168 [ 41.687370] The buggy address is located 88 bytes inside of [ 41.687370] freed 168-byte region [ffff88800fbe6740, ffff88800fbe67e8) [ 41.688878] [ 41.689108] The buggy address belongs to the physical page: [ 41.689837] page:0000000032269bff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbe6 [ 41.691001] memcg:ffff88800fb8ac01 [ 41.691450] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.692192] page_type: 0xffffffff() [ 41.692670] raw: 0100000000000200 ffff88800879fc80 ffffea00003ef840 dead000000000005 [ 41.693644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb8ac01 [ 41.694583] page dumped because: kasan: bad access detected [ 41.695262] [ 41.695488] Memory state around the buggy address: [ 41.696094] ffff88800fbe6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.696988] ffff88800fbe6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.697877] >ffff88800fbe6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.698764] ^ [ 41.699274] ffff88800fbe6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.700159] ffff88800fbe6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.701047] ================================================================== [ 41.702288] Disabling lock debugging due to kernel taint [ 43.608294] BUG: Bad rss-counter state mm:00000000a2487ae4 type:MM_FILEPAGES val:33 [ 43.609329] BUG: Bad rss-counter state mm:00000000a2487ae4 type:MM_ANONPAGES val:22 [ 44.146758] BUG: Bad rss-counter state mm:00000000b2c418ab type:MM_FILEPAGES val:33 [ 44.147956] BUG: Bad rss-counter state mm:00000000b2c418ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10643' (ECDSA) to the list of known hosts. 2023/06/19 15:15:29 fuzzer started 2023/06/19 15:15:29 dialing manager at localhost:44161 2023/06/19 15:15:29 checking machine... 2023/06/19 15:15:29 checking revisions... [ 44.894468] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:15:30 testing simple program... [ 44.941655] cgroup: Unknown subsys name 'net' [ 44.995912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:15:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffec1233ff8 CR3=0000000017de6000 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=2039323a35313a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a35313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff86137d01 RDX=1ffff1100d9e136e RSI=ffffffff8180c8da RDI=ffff88806cf09b70 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888018d43680 R15=ffff88800c706c80 RIP=ffffffff813ad446 RFL=00000296 [--S-AP-] 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 00007f79caf0a900 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=00007f79cb4c20b0 CR3=000000000dfda000 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=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