[ 23.876478] BUG: Bad rss-counter state mm:000000006573ddea type:MM_FILEPAGES val:33 [ 23.877671] BUG: Bad rss-counter state mm:000000006573ddea type:MM_ANONPAGES val:22 [ 23.915051] ================================================================== [ 23.915952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.916890] Read of size 8 at addr ffff8880168534e0 by task sshd/219 [ 23.917671] [ 23.917888] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.918904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.919881] Call Trace: [ 23.920202] [ 23.920503] dump_stack_lvl+0x91/0xf0 [ 23.921037] print_report+0xcc/0x620 [ 23.921557] ? __virt_addr_valid+0x102/0x340 [ 23.922112] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.922718] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.923332] kasan_report+0xbe/0xf0 [ 23.923811] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.924431] vma_interval_tree_remove+0xc75/0xec0 [ 23.925031] vma_prepare+0xc54/0x11a0 [ 23.925527] __split_vma+0x5af/0x950 [ 23.926005] ? __pfx___split_vma+0x10/0x10 [ 23.926541] ? find_held_lock+0x2c/0x110 [ 23.927063] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.927627] ? lock_is_held_type+0x9f/0x120 [ 23.928168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.928777] ? mtree_range_walk+0x632/0x900 [ 23.929340] ? mas_walk+0x5c7/0x7c0 [ 23.929836] do_vmi_munmap+0x1f1/0x2b0 [ 23.930324] mmap_region+0x1f9/0x2660 [ 23.930809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.931317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.932039] ? __pfx_lock_acquire+0x10/0x10 [ 23.932572] ? __pfx_mmap_region+0x10/0x10 [ 23.933103] ? security_mmap_addr+0x7d/0xa0 [ 23.933647] ? get_unmapped_area+0x1f5/0x3f0 [ 23.934194] do_mmap+0x854/0xf00 [ 23.934633] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.935126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.935696] ksys_mmap_pgoff+0x3af/0x500 [ 23.936215] do_syscall_64+0x3f/0x90 [ 23.936700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.937381] RIP: 0033:0x7f104f3e1d82 [ 23.937855] 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 [ 23.940017] RSP: 002b:00007ffff70a1a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.940952] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f104f3e1d82 [ 23.941802] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f104e81b000 [ 23.942645] RBP: 00007f104e81b000 R08: 0000000000000009 R09: 0000000000001000 [ 23.943484] R10: 0000000000000812 R11: 0000000000000206 R12: 000055657a577f60 [ 23.944331] R13: 00007ffff70a1a90 R14: 00007ffff70a1ac0 R15: 00007ffff70a1e20 [ 23.945193] [ 23.945489] [ 23.945702] Allocated by task 212: [ 23.946126] kasan_save_stack+0x22/0x50 [ 23.946630] kasan_set_track+0x25/0x30 [ 23.947120] __kasan_slab_alloc+0x59/0x70 [ 23.947643] kmem_cache_alloc+0x16b/0x370 [ 23.948157] vm_area_dup+0x20/0x160 [ 23.948611] __split_vma+0x170/0x950 [ 23.949080] split_vma+0xc6/0x110 [ 23.949544] mprotect_fixup+0x8d2/0xb30 [ 23.950042] do_mprotect_pkey+0x87e/0xd40 [ 23.950571] __x64_sys_mprotect+0x78/0xc0 [ 23.951088] do_syscall_64+0x3f/0x90 [ 23.951566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.952208] [ 23.952425] Freed by task 13: [ 23.952806] kasan_save_stack+0x22/0x50 [ 23.953319] kasan_set_track+0x25/0x30 [ 23.953825] kasan_save_free_info+0x2b/0x50 [ 23.954379] __kasan_slab_free+0x10a/0x190 [ 23.954925] kmem_cache_free+0x10d/0x4d0 [ 23.955444] rcu_core+0x8c8/0x2860 [ 23.955886] __do_softirq+0x1b7/0x7d4 [ 23.956384] [ 23.956600] Last potentially related work creation: [ 23.957185] kasan_save_stack+0x22/0x50 [ 23.957706] __kasan_record_aux_stack+0x8e/0xa0 [ 23.958283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.958932] remove_vma+0x139/0x170 [ 23.959385] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.960005] do_vmi_munmap+0x1f1/0x2b0 [ 23.960505] __vm_munmap+0x138/0x3a0 [ 23.960975] __x64_sys_munmap+0x59/0x80 [ 23.961487] do_syscall_64+0x3f/0x90 [ 23.961963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.962618] [ 23.962829] The buggy address belongs to the object at ffff888016853488 [ 23.962829] which belongs to the cache vm_area_struct of size 168 [ 23.964337] The buggy address is located 88 bytes inside of [ 23.964337] freed 168-byte region [ffff888016853488, ffff888016853530) [ 23.965767] [ 23.965985] The buggy address belongs to the physical page: [ 23.966648] page:00000000b3af7caf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16853 [ 23.967757] memcg:ffff88800e8aea01 [ 23.968179] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.968823] page_type: 0xffffffff() [ 23.969277] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.970228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8aea01 [ 23.971152] page dumped because: kasan: bad access detected [ 23.971814] [ 23.972035] Memory state around the buggy address: [ 23.972613] ffff888016853380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.973480] ffff888016853400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.974352] >ffff888016853480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.975210] ^ [ 23.975969] ffff888016853500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.976843] ffff888016853580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.977720] ================================================================== [ 23.978716] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.033113] BUG: Bad rss-counter state mm:000000003c3ef80d type:MM_FILEPAGES val:33 [ 26.034544] BUG: Bad rss-counter state mm:000000003c3ef80d type:MM_ANONPAGES val:22 [ 26.520491] BUG: Bad rss-counter state mm:000000000b47b869 type:MM_FILEPAGES val:33 [ 26.521521] BUG: Bad rss-counter state mm:000000000b47b869 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50087' (ECDSA) to the list of known hosts. 2023/06/21 07:18:52 fuzzer started 2023/06/21 07:18:53 dialing manager at localhost:36067 2023/06/21 07:18:53 checking machine... 2023/06/21 07:18:53 checking revisions... [ 27.232553] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:18:53 testing simple program... [ 27.283695] cgroup: Unknown subsys name 'net' [ 27.333165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:18:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cf1d5f0 RCX=ffff88800cf1d5f0 RDX=00000000800d000c RSI=ffff88800cf1d5f0 RDI=ffff88800844f780 RBP=ffff888016edfa28 RSP=ffff888016edf990 R8 =00000000800d000b R9 =0000000000000000 R10=ffffea000033c740 R11=00000000000d000c R12=ffffea000033c740 R13=ffff88800cf1d4c0 R14=00000000800d000b R15=ffff88800844f780 RIP=ffffffff81809672 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 00007f5a6b865900 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=00007ffca153d000 CR3=000000000e408000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f1a99a8bb90 CR3=000000000cb80000 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=2032353a38313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a38313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000