[ 30.113229] BUG: Bad rss-counter state mm:00000000b2e30624 type:MM_FILEPAGES val:33 [ 30.114466] BUG: Bad rss-counter state mm:00000000b2e30624 type:MM_ANONPAGES val:22 [ 30.273030] ================================================================== [ 30.273949] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.274874] Read of size 8 at addr ffff88800db9ac20 by task sshd/218 [ 30.275643] [ 30.275862] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.276914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.277831] Call Trace: [ 30.278133] [ 30.278405] dump_stack_lvl+0x91/0xf0 [ 30.278895] print_report+0xcc/0x620 [ 30.279361] ? __virt_addr_valid+0x102/0x340 [ 30.279886] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.280484] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.281073] kasan_report+0xbe/0xf0 [ 30.281528] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.282165] vma_interval_tree_remove+0xc75/0xec0 [ 30.282808] vma_prepare+0xc54/0x11a0 [ 30.283350] __split_vma+0x5af/0x950 [ 30.283869] ? __pfx___split_vma+0x10/0x10 [ 30.284462] ? find_held_lock+0x2c/0x110 [ 30.285020] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.285587] ? lock_is_held_type+0x9f/0x120 [ 30.286129] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.286734] ? mtree_range_walk+0x632/0x900 [ 30.287282] ? mas_walk+0x5c7/0x7c0 [ 30.287753] do_vmi_munmap+0x1f1/0x2b0 [ 30.288269] mmap_region+0x1f9/0x2660 [ 30.288753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.289262] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.289973] ? __pfx_lock_acquire+0x10/0x10 [ 30.290504] ? __pfx_mmap_region+0x10/0x10 [ 30.291031] ? security_mmap_addr+0x7d/0xa0 [ 30.291561] ? get_unmapped_area+0x1f5/0x3f0 [ 30.292124] do_mmap+0x854/0xf00 [ 30.292568] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.293066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.293628] ksys_mmap_pgoff+0x3af/0x500 [ 30.294134] do_syscall_64+0x3f/0x90 [ 30.294612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.295257] RIP: 0033:0x7f8f767d4d82 [ 30.295713] 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 [ 30.297875] RSP: 002b:00007ffc289e7a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.298765] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f767d4d82 [ 30.299621] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f75c0e000 [ 30.300477] RBP: 00007f8f75c0e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.301327] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9b77a0b20 [ 30.302177] R13: 00007ffc289e7a30 R14: 00007ffc289e7a60 R15: 00007ffc289e7dc0 [ 30.303035] [ 30.303327] [ 30.303546] Allocated by task 211: [ 30.303976] kasan_save_stack+0x22/0x50 [ 30.304497] kasan_set_track+0x25/0x30 [ 30.304983] __kasan_slab_alloc+0x59/0x70 [ 30.305511] kmem_cache_alloc+0x16b/0x370 [ 30.306021] vm_area_dup+0x20/0x160 [ 30.306471] __split_vma+0x170/0x950 [ 30.306934] split_vma+0xc6/0x110 [ 30.307365] mprotect_fixup+0x8d2/0xb30 [ 30.307858] do_mprotect_pkey+0x87e/0xd40 [ 30.308384] __x64_sys_mprotect+0x78/0xc0 [ 30.308893] do_syscall_64+0x3f/0x90 [ 30.309359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.310001] [ 30.310222] Freed by task 211: [ 30.310615] kasan_save_stack+0x22/0x50 [ 30.311117] kasan_set_track+0x25/0x30 [ 30.311614] kasan_save_free_info+0x2b/0x50 [ 30.312149] __kasan_slab_free+0x10a/0x190 [ 30.312680] kmem_cache_free+0x10d/0x4d0 [ 30.313191] rcu_core+0x8c8/0x2860 [ 30.313627] __do_softirq+0x1b7/0x7d4 [ 30.314099] [ 30.314316] Last potentially related work creation: [ 30.314899] kasan_save_stack+0x22/0x50 [ 30.315401] __kasan_record_aux_stack+0x8e/0xa0 [ 30.315972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.316635] remove_vma+0x139/0x170 [ 30.317082] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.317636] do_vmi_munmap+0x1f1/0x2b0 [ 30.318123] __vm_munmap+0x138/0x3a0 [ 30.318586] __x64_sys_munmap+0x59/0x80 [ 30.319080] do_syscall_64+0x3f/0x90 [ 30.319554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.320203] [ 30.320417] The buggy address belongs to the object at ffff88800db9abc8 [ 30.320417] which belongs to the cache vm_area_struct of size 168 [ 30.321873] The buggy address is located 88 bytes inside of [ 30.321873] freed 168-byte region [ffff88800db9abc8, ffff88800db9ac70) [ 30.323272] [ 30.323486] The buggy address belongs to the physical page: [ 30.324158] page:00000000b84bc9f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb9a [ 30.325239] memcg:ffff88800e3a3101 [ 30.325664] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.326312] page_type: 0xffffffff() [ 30.326760] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.327673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3a3101 [ 30.328586] page dumped because: kasan: bad access detected [ 30.329254] [ 30.329467] Memory state around the buggy address: [ 30.330052] ffff88800db9ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.330904] ffff88800db9ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.331767] >ffff88800db9ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.332620] ^ [ 30.333156] ffff88800db9ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.334006] ffff88800db9ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.334859] ================================================================== [ 30.336115] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.420806] BUG: Bad rss-counter state mm:00000000913b603a type:MM_FILEPAGES val:33 [ 32.421844] BUG: Bad rss-counter state mm:00000000913b603a type:MM_ANONPAGES val:22 [ 32.996293] BUG: Bad rss-counter state mm:0000000096f89dfc type:MM_FILEPAGES val:33 [ 32.997479] BUG: Bad rss-counter state mm:0000000096f89dfc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26211' (ECDSA) to the list of known hosts. 2023/06/19 22:42:39 fuzzer started 2023/06/19 22:42:39 dialing manager at localhost:44161 2023/06/19 22:42:39 checking machine... 2023/06/19 22:42:39 checking revisions... [ 33.626350] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:42:39 testing simple program... [ 33.669250] cgroup: Unknown subsys name 'net' [ 33.727255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:42:32 Registers: info registers vcpu 0 RAX=0000000000000006 RBX=00000000cdbe6a8f RCX=ffff88806cb35478 RDX=0000000000000014 RSI=ffffffff816cb48b RDI=00000000c35e8c8a RBP=ffff88800e118590 RSP=ffff88801670f3b8 R8 =000000005d3b9c92 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092820 R14=ffff88801670f420 R15=0000000000000014 RIP=ffffffff82270f3c RFL=00000212 [----A--] 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 00007f01ac24c700 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=00007f6fad529fe8 CR3=000000000c51a000 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=00000000000000000000000000000000 XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383838 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88807ffdc500 RCX=0000000000000002 RDX=1ffffd4000079cf0 RSI=ffffea00003ce780 RDI=ffff88807ffdc588 RBP=0100000000000000 RSP=ffff88800fe17460 R8 =0000000000001000 R9 =000000000007ffe0 R10=ffffffff85d3bed7 R11=1ffff1100fffb8b9 R12=0000000000000001 R13=ffff88807ffdc500 R14=0000000000000000 R15=0000000000000002 RIP=ffffffff8178746e 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 00007f2717862900 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=00007ffceb8a2000 CR3=000000000eaa6000 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