syzkaller login: [ 115.032432] BUG: Bad rss-counter state mm:00000000b050a6fb type:MM_FILEPAGES val:33 [ 115.033653] BUG: Bad rss-counter state mm:00000000b050a6fb type:MM_ANONPAGES val:22 [ 115.070874] ================================================================== [ 115.071994] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 115.073155] Read of size 8 at addr ffff888016db44e0 by task sshd/220 [ 115.073918] [ 115.074146] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 115.075216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 115.076231] Call Trace: [ 115.076569] [ 115.076856] dump_stack_lvl+0x91/0xf0 [ 115.077355] print_report+0xcc/0x620 [ 115.077841] ? __virt_addr_valid+0x102/0x340 [ 115.078400] ? vma_interval_tree_remove+0xc75/0xec0 [ 115.079021] ? vma_interval_tree_remove+0xc75/0xec0 [ 115.079651] kasan_report+0xbe/0xf0 [ 115.080125] ? vma_interval_tree_remove+0xc75/0xec0 [ 115.080751] vma_interval_tree_remove+0xc75/0xec0 [ 115.081358] vma_prepare+0xc54/0x11a0 [ 115.081845] __split_vma+0x5af/0x950 [ 115.082469] ? __pfx___split_vma+0x10/0x10 [ 115.083005] ? find_held_lock+0x2c/0x110 [ 115.083562] do_vmi_align_munmap+0x2ba/0x11f0 [ 115.084132] ? lock_is_held_type+0x9f/0x120 [ 115.084697] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 115.085482] ? mtree_range_walk+0x632/0x900 [ 115.086216] ? mas_walk+0x5c7/0x7c0 [ 115.086843] do_vmi_munmap+0x1f1/0x2b0 [ 115.087521] mmap_region+0x1f9/0x2660 [ 115.088183] ? vm_mmap_pgoff+0x15c/0x3a0 [ 115.088893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 115.089819] ? __pfx_lock_acquire+0x10/0x10 [ 115.090378] ? __pfx_mmap_region+0x10/0x10 [ 115.090915] ? security_mmap_addr+0x7d/0xa0 [ 115.091484] ? get_unmapped_area+0x1f5/0x3f0 [ 115.092037] do_mmap+0x854/0xf00 [ 115.092503] vm_mmap_pgoff+0x1a6/0x3a0 [ 115.093014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 115.093608] ksys_mmap_pgoff+0x3af/0x500 [ 115.094116] do_syscall_64+0x3f/0x90 [ 115.094625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 115.095293] RIP: 0033:0x7f005e81dd82 [ 115.095780] 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 [ 115.097936] RSP: 002b:00007ffd96b2de68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 115.098881] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f005e81dd82 [ 115.099779] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f005dc57000 [ 115.100654] RBP: 00007f005dc57000 R08: 0000000000000009 R09: 0000000000001000 [ 115.101521] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4405d6d90 [ 115.102385] R13: 00007ffd96b2de80 R14: 00007ffd96b2deb0 R15: 00007ffd96b2e210 [ 115.103293] [ 115.103613] [ 115.103833] Allocated by task 213: [ 115.104269] kasan_save_stack+0x22/0x50 [ 115.104794] kasan_set_track+0x25/0x30 [ 115.105290] __kasan_slab_alloc+0x59/0x70 [ 115.105835] kmem_cache_alloc+0x16b/0x370 [ 115.106370] vm_area_dup+0x20/0x160 [ 115.106829] __split_vma+0x170/0x950 [ 115.107308] split_vma+0xc6/0x110 [ 115.107778] mprotect_fixup+0x8d2/0xb30 [ 115.108278] do_mprotect_pkey+0x87e/0xd40 [ 115.108813] __x64_sys_mprotect+0x78/0xc0 [ 115.109353] do_syscall_64+0x3f/0x90 [ 115.109866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 115.110587] [ 115.110861] Freed by task 213: [ 115.111279] kasan_save_stack+0x22/0x50 [ 115.111798] kasan_set_track+0x25/0x30 [ 115.112293] kasan_save_free_info+0x2b/0x50 [ 115.112836] __kasan_slab_free+0x10a/0x190 [ 115.113412] kmem_cache_free+0x10d/0x4d0 [ 115.113927] rcu_core+0x8c8/0x2860 [ 115.114390] __do_softirq+0x1b7/0x7d4 [ 115.114875] [ 115.115089] Last potentially related work creation: [ 115.115713] kasan_save_stack+0x22/0x50 [ 115.116214] __kasan_record_aux_stack+0x8e/0xa0 [ 115.116814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 115.117486] remove_vma+0x139/0x170 [ 115.117938] do_vmi_align_munmap+0xd4a/0x11f0 [ 115.118538] do_vmi_munmap+0x1f1/0x2b0 [ 115.119024] __vm_munmap+0x138/0x3a0 [ 115.119531] __x64_sys_munmap+0x59/0x80 [ 115.120034] do_syscall_64+0x3f/0x90 [ 115.120528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 115.121182] [ 115.121414] The buggy address belongs to the object at ffff888016db4488 [ 115.121414] which belongs to the cache vm_area_struct of size 168 [ 115.122951] The buggy address is located 88 bytes inside of [ 115.122951] freed 168-byte region [ffff888016db4488, ffff888016db4530) [ 115.124430] [ 115.124659] The buggy address belongs to the physical page: [ 115.125343] page:00000000e1e8b6c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16db4 [ 115.126545] memcg:ffff88800c5bfe01 [ 115.126986] flags: 0x100000000000200(slab|node=0|zone=1) [ 115.127706] page_type: 0xffffffff() [ 115.128158] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 115.129107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5bfe01 [ 115.130071] page dumped because: kasan: bad access detected [ 115.130779] [ 115.131002] Memory state around the buggy address: [ 115.131619] ffff888016db4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 115.132499] ffff888016db4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 115.133379] >ffff888016db4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 115.134225] ^ [ 115.135012] ffff888016db4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 115.135917] ffff888016db4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 115.136782] ================================================================== [ 115.137785] Disabling lock debugging due to kernel taint [ 117.258508] BUG: Bad rss-counter state mm:0000000099aa65aa type:MM_FILEPAGES val:33 [ 117.260149] BUG: Bad rss-counter state mm:0000000099aa65aa type:MM_ANONPAGES val:22 [ 117.665560] BUG: Bad rss-counter state mm:0000000037fd32cd type:MM_FILEPAGES val:33 [ 117.666566] BUG: Bad rss-counter state mm:0000000037fd32cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13084' (ECDSA) to the list of known hosts. 2023/06/20 05:00:44 fuzzer started 2023/06/20 05:00:45 dialing manager at localhost:44161 2023/06/20 05:00:45 checking machine... 2023/06/20 05:00:45 checking revisions... [ 118.437162] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:00:45 testing simple program... [ 118.483847] cgroup: Unknown subsys name 'net' [ 118.535199] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:59:20 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=00007ffefde81368 CR3=000000000973c000 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=2034343a30303a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a30303a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016c679d8 RCX=0000000000000001 RDX=1ffff11002d8cf3c RSI=ffff888016c679a8 RDI=ffff888016c679e0 RBP=ffff888016c679a8 RSP=ffff888016c678e0 R8 =0000000000000001 R9 =ffff888016c67a18 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff888016c67a20 R14=ffff888016c679a8 R15=ffff888016c679d8 RIP=ffffffff81130445 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 00007fca98a0e900 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=00007fffca16f000 CR3=000000000f380000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000