syzkaller login: [ 38.794834] BUG: Bad rss-counter state mm:000000008ff06733 type:MM_FILEPAGES val:33 [ 38.795845] BUG: Bad rss-counter state mm:000000008ff06733 type:MM_ANONPAGES val:22 [ 38.964023] ================================================================== [ 38.964910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.965841] Read of size 8 at addr ffff88800eb8b880 by task sshd/219 [ 38.966784] [ 38.967004] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.967859] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.968809] Call Trace: [ 38.969133] [ 38.969415] dump_stack_lvl+0x91/0xf0 [ 38.969899] print_report+0xcc/0x620 [ 38.970376] ? __virt_addr_valid+0x102/0x340 [ 38.970936] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971551] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972162] kasan_report+0xbe/0xf0 [ 38.972629] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973261] vma_interval_tree_remove+0xc75/0xec0 [ 38.973902] vma_prepare+0xc54/0x11a0 [ 38.974404] __split_vma+0x5af/0x950 [ 38.974922] ? __pfx___split_vma+0x10/0x10 [ 38.975481] ? find_held_lock+0x2c/0x110 [ 38.976031] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.976627] ? lock_is_held_type+0x9f/0x120 [ 38.977197] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.977837] ? mtree_range_walk+0x632/0x900 [ 38.978409] ? mas_walk+0x5c7/0x7c0 [ 38.978924] do_vmi_munmap+0x1f1/0x2b0 [ 38.979445] mmap_region+0x1f9/0x2660 [ 38.979958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.980494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.981245] ? __pfx_lock_acquire+0x10/0x10 [ 38.981817] ? __pfx_mmap_region+0x10/0x10 [ 38.982384] ? security_mmap_addr+0x7d/0xa0 [ 38.982959] ? get_unmapped_area+0x1f5/0x3f0 [ 38.983540] do_mmap+0x854/0xf00 [ 38.983995] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.984526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.985122] ksys_mmap_pgoff+0x3af/0x500 [ 38.985659] do_syscall_64+0x3f/0x90 [ 38.986164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986856] RIP: 0033:0x7f808ca90d82 [ 38.987338] 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 [ 38.989601] RSP: 002b:00007fff371a6028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.990557] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f808ca90d82 [ 38.991457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f808beca000 [ 38.992355] RBP: 00007f808beca000 R08: 0000000000000009 R09: 0000000000001000 [ 38.993240] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c635a1f70 [ 38.994149] R13: 00007fff371a6040 R14: 00007fff371a6070 R15: 00007fff371a63d0 [ 38.995074] [ 38.995384] [ 38.995617] Allocated by task 212: [ 38.996080] kasan_save_stack+0x22/0x50 [ 38.996610] kasan_set_track+0x25/0x30 [ 38.997129] __kasan_slab_alloc+0x59/0x70 [ 38.997684] kmem_cache_alloc+0x16b/0x370 [ 38.998229] vm_area_dup+0x20/0x160 [ 38.998707] __split_vma+0x170/0x950 [ 38.999215] split_vma+0xc6/0x110 [ 38.999670] mprotect_fixup+0x8d2/0xb30 [ 39.000202] do_mprotect_pkey+0x87e/0xd40 [ 39.000747] __x64_sys_mprotect+0x78/0xc0 [ 39.001301] do_syscall_64+0x3f/0x90 [ 39.001801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002474] [ 39.002700] Freed by task 19: [ 39.003112] kasan_save_stack+0x22/0x50 [ 39.003645] kasan_set_track+0x25/0x30 [ 39.004171] kasan_save_free_info+0x2b/0x50 [ 39.004735] __kasan_slab_free+0x10a/0x190 [ 39.005298] kmem_cache_free+0x10d/0x4d0 [ 39.005826] rcu_core+0x8c8/0x2860 [ 39.006297] __do_softirq+0x1b7/0x7d4 [ 39.006815] [ 39.007049] Last potentially related work creation: [ 39.007745] kasan_save_stack+0x22/0x50 [ 39.008274] __kasan_record_aux_stack+0x8e/0xa0 [ 39.008874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.009563] remove_vma+0x139/0x170 [ 39.010037] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.010627] do_vmi_munmap+0x1f1/0x2b0 [ 39.011149] __vm_munmap+0x138/0x3a0 [ 39.011644] __x64_sys_munmap+0x59/0x80 [ 39.012161] do_syscall_64+0x3f/0x90 [ 39.012658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.013339] [ 39.013561] The buggy address belongs to the object at ffff88800eb8b828 [ 39.013561] which belongs to the cache vm_area_struct of size 168 [ 39.015123] The buggy address is located 88 bytes inside of [ 39.015123] freed 168-byte region [ffff88800eb8b828, ffff88800eb8b8d0) [ 39.016603] [ 39.016824] The buggy address belongs to the physical page: [ 39.017524] page:0000000074468814 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb8b [ 39.018661] memcg:ffff8880144d8401 [ 39.019136] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.019863] page_type: 0xffffffff() [ 39.020329] raw: 0100000000000200 ffff88800879fc80 ffffea000031af80 dead000000000005 [ 39.021298] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144d8401 [ 39.022242] page dumped because: kasan: bad access detected [ 39.022947] [ 39.023174] Memory state around the buggy address: [ 39.023788] ffff88800eb8b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.024693] ffff88800eb8b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.025588] >ffff88800eb8b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.026475] ^ [ 39.026920] ffff88800eb8b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.027820] ffff88800eb8b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.028703] ================================================================== [ 39.029727] Disabling lock debugging due to kernel taint [ 40.963751] BUG: Bad rss-counter state mm:00000000e9db526b type:MM_FILEPAGES val:33 [ 40.964705] BUG: Bad rss-counter state mm:00000000e9db526b type:MM_ANONPAGES val:22 [ 41.449542] BUG: Bad rss-counter state mm:000000005d2a0e5c type:MM_FILEPAGES val:33 [ 41.450693] BUG: Bad rss-counter state mm:000000005d2a0e5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24088' (ECDSA) to the list of known hosts. 2023/06/19 19:59:09 fuzzer started 2023/06/19 19:59:09 dialing manager at localhost:44161 2023/06/19 19:59:09 checking machine... 2023/06/19 19:59:09 checking revisions... [ 42.277329] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:59:09 testing simple program... [ 42.322102] cgroup: Unknown subsys name 'net' [ 42.361890] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:59:09 Registers: info registers vcpu 0 RAX=00007ffd0bddc198 RBX=00005642789d9f70 RCX=0000000000000006 RDX=0000000000000d2a RSI=000000000000000a RDI=00005642789e8146 RBP=00007ffd0bddc190 RSP=00007ffd0bddc128 R8 =00005642789e8146 R9 =00007f1038b01be0 R10=000000000000006f R11=0000000000000246 R12=00007f103854f900 R13=00007ffd0bddc198 R14=0000000000000d2a R15=0000000000000000 RIP=00007f1038a9e970 RFL=00000283 [--S---C] 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 00007f103854f900 00000000 00000000 GS =0000 0000000000000000 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=00007f1038b04650 CR3=000000000eef0000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=22206f74207465732073692042414e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=5f5350554f5247524553552066492023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880165bf610 RCX=ffffffff86137501 RDX=1ffff11002cb7ec2 RSI=ffffffff8180c585 RDI=ffff8880165bf61c RBP=0000000000000001 RSP=ffff8880165bf528 R8 =ffffffff8613751e R9 =ffff8880165bf588 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880165bf610 R13=0000000000000000 R14=ffff888015d83680 R15=ffff88800da07e80 RIP=ffffffff813ad4cf 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 00007ff8b2d95700 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=00007f07db340b30 CR3=000000001952c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039303a3935 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000