syzkaller login: [ 38.794577] BUG: Bad rss-counter state mm:00000000f21ea56b type:MM_FILEPAGES val:33 [ 38.796042] BUG: Bad rss-counter state mm:00000000f21ea56b type:MM_ANONPAGES val:22 [ 38.834466] ================================================================== [ 38.835542] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.836597] Read of size 8 at addr ffff88800e85d968 by task sshd/218 [ 38.837456] [ 38.837754] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.838759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.839882] Call Trace: [ 38.840287] [ 38.840576] dump_stack_lvl+0x91/0xf0 [ 38.841155] print_report+0xcc/0x620 [ 38.841764] ? __virt_addr_valid+0x102/0x340 [ 38.842423] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843141] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843862] kasan_report+0xbe/0xf0 [ 38.844433] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.845129] vma_interval_tree_remove+0xc75/0xec0 [ 38.845820] vma_prepare+0xc54/0x11a0 [ 38.846391] __split_vma+0x5af/0x950 [ 38.846983] ? __pfx___split_vma+0x10/0x10 [ 38.847521] ? find_held_lock+0x2c/0x110 [ 38.848073] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.848780] ? lock_is_held_type+0x9f/0x120 [ 38.849322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.849954] ? mtree_range_walk+0x632/0x900 [ 38.850529] ? mas_walk+0x5c7/0x7c0 [ 38.851010] do_vmi_munmap+0x1f1/0x2b0 [ 38.851505] mmap_region+0x1f9/0x2660 [ 38.851991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.852505] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.853220] ? __pfx_lock_acquire+0x10/0x10 [ 38.853751] ? __pfx_mmap_region+0x10/0x10 [ 38.854307] ? security_mmap_addr+0x7d/0xa0 [ 38.854872] ? get_unmapped_area+0x1f5/0x3f0 [ 38.855415] do_mmap+0x854/0xf00 [ 38.855852] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.856345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.856905] ksys_mmap_pgoff+0x3af/0x500 [ 38.857409] do_syscall_64+0x3f/0x90 [ 38.857888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.858537] RIP: 0033:0x7f1c3eca5d82 [ 38.859013] 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 [ 38.861149] RSP: 002b:00007ffc6d174668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.862047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c3eca5d82 [ 38.862900] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c3e0df000 [ 38.863749] RBP: 00007f1c3e0df000 R08: 0000000000000009 R09: 0000000000001000 [ 38.864601] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557473cf2d90 [ 38.865453] R13: 00007ffc6d174680 R14: 00007ffc6d1746b0 R15: 00007ffc6d174a10 [ 38.866309] [ 38.866600] [ 38.866821] Allocated by task 211: [ 38.867248] kasan_save_stack+0x22/0x50 [ 38.867751] kasan_set_track+0x25/0x30 [ 38.868290] __kasan_slab_alloc+0x59/0x70 [ 38.868840] kmem_cache_alloc+0x16b/0x370 [ 38.869366] vm_area_dup+0x20/0x160 [ 38.869824] __split_vma+0x170/0x950 [ 38.870290] split_vma+0xc6/0x110 [ 38.870745] mprotect_fixup+0x8d2/0xb30 [ 38.871289] do_mprotect_pkey+0x87e/0xd40 [ 38.871828] __x64_sys_mprotect+0x78/0xc0 [ 38.872355] do_syscall_64+0x3f/0x90 [ 38.872832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873476] [ 38.873691] Freed by task 211: [ 38.874185] kasan_save_stack+0x22/0x50 [ 38.874693] kasan_set_track+0x25/0x30 [ 38.875197] kasan_save_free_info+0x2b/0x50 [ 38.875743] __kasan_slab_free+0x10a/0x190 [ 38.876279] kmem_cache_free+0x10d/0x4d0 [ 38.876799] rcu_core+0x8c8/0x2860 [ 38.877244] __do_softirq+0x1b7/0x7d4 [ 38.877728] [ 38.877944] Last potentially related work creation: [ 38.878528] kasan_save_stack+0x22/0x50 [ 38.879037] __kasan_record_aux_stack+0x8e/0xa0 [ 38.879612] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.880269] remove_vma+0x139/0x170 [ 38.880728] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.881297] do_vmi_munmap+0x1f1/0x2b0 [ 38.881787] __vm_munmap+0x138/0x3a0 [ 38.882265] __x64_sys_munmap+0x59/0x80 [ 38.882762] do_syscall_64+0x3f/0x90 [ 38.883264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.883919] [ 38.884137] Second to last potentially related work creation: [ 38.884821] kasan_save_stack+0x22/0x50 [ 38.885335] __kasan_record_aux_stack+0x8e/0xa0 [ 38.885911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.886557] remove_vma+0x139/0x170 [ 38.887024] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.887591] do_vmi_munmap+0x1f1/0x2b0 [ 38.888083] mmap_region+0x1f9/0x2660 [ 38.888568] do_mmap+0x854/0xf00 [ 38.889003] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.889495] ksys_mmap_pgoff+0x3af/0x500 [ 38.890005] do_syscall_64+0x3f/0x90 [ 38.890479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891130] [ 38.891350] The buggy address belongs to the object at ffff88800e85d910 [ 38.891350] which belongs to the cache vm_area_struct of size 168 [ 38.892832] The buggy address is located 88 bytes inside of [ 38.892832] freed 168-byte region [ffff88800e85d910, ffff88800e85d9b8) [ 38.894244] [ 38.894462] The buggy address belongs to the physical page: [ 38.895143] page:000000000d061e32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe85d [ 38.896492] memcg:ffff8880101ef801 [ 38.896923] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.897641] page_type: 0xffffffff() [ 38.898088] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.899021] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880101ef801 [ 38.899948] page dumped because: kasan: bad access detected [ 38.900631] [ 38.900848] Memory state around the buggy address: [ 38.901427] ffff88800e85d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.902283] ffff88800e85d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.903154] >ffff88800e85d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.904000] ^ [ 38.904789] ffff88800e85d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.905650] ffff88800e85da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.906500] ================================================================== [ 38.907510] Disabling lock debugging due to kernel taint [ 41.578973] BUG: Bad rss-counter state mm:00000000e9502a1b type:MM_FILEPAGES val:33 [ 41.579973] BUG: Bad rss-counter state mm:00000000e9502a1b type:MM_ANONPAGES val:22 [ 42.058562] BUG: Bad rss-counter state mm:00000000a8e49df6 type:MM_FILEPAGES val:33 [ 42.059633] BUG: Bad rss-counter state mm:00000000a8e49df6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10401' (ECDSA) to the list of known hosts. 2023/06/21 05:29:00 fuzzer started 2023/06/21 05:29:00 dialing manager at localhost:36067 2023/06/21 05:29:00 checking machine... 2023/06/21 05:29:00 checking revisions... [ 42.785736] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:29:00 testing simple program... [ 42.845174] cgroup: Unknown subsys name 'net' [ 42.933210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=ffffffff81264272 RDX=1ffff1100d9e73db RSI=0000000000000000 RDI=ffff88806cf39ee0 RBP=ffff888008d951c0 RSP=ffff88806ce09c80 R8 =0000000000000000 R9 =ffffed1001180824 R10=ffff888008c04127 R11=1ffff1100d9c7479 R12=ffff888008c0403c R13=ffff888008c04000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff812418bb RFL=00000046 [---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 00007fb79f082900 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=00007ffdf1bba000 CR3=000000000f60e000 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=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 info registers vcpu 1 RAX=ffffffff813782f8 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e60 RDI=ffff88806cf09e60 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8613897a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff81131041 RFL=00000202 [-------] 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 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=00007f9766bb7f30 CR3=000000000ca62000 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=be9e298047fc5382214ced97c28ad748 XMM02=000000000011b1f8ec2efd57dc4c00df XMM03=0000000000121b982799268ba37672d2 XMM04=d1da74a5f684b80200000000000ae988 XMM05=766ac644bb0696850000000000133c60 XMM06=bdf2e299e47b49d50000000000132990 XMM07=e042d86d42eb936e0000000000121e70 XMM08=2799268ba37672d2000000000011b258 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000