[ 23.726855] BUG: Bad rss-counter state mm:000000000dde307a type:MM_FILEPAGES val:33 [ 23.728103] BUG: Bad rss-counter state mm:000000000dde307a type:MM_ANONPAGES val:22 [ 23.886271] ================================================================== [ 23.887225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.888167] Read of size 8 at addr ffff88800f7633f8 by task sshd/220 [ 23.888938] [ 23.889160] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.890170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.891169] Call Trace: [ 23.891498] [ 23.891895] dump_stack_lvl+0x91/0xf0 [ 23.892481] print_report+0xcc/0x620 [ 23.893054] ? __virt_addr_valid+0x102/0x340 [ 23.893705] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.894431] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.895180] kasan_report+0xbe/0xf0 [ 23.895752] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.896514] vma_interval_tree_remove+0xc75/0xec0 [ 23.897248] vma_prepare+0xc54/0x11a0 [ 23.897837] __split_vma+0x5af/0x950 [ 23.898413] ? __pfx___split_vma+0x10/0x10 [ 23.899091] ? find_held_lock+0x2c/0x110 [ 23.899730] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.900422] ? lock_is_held_type+0x9f/0x120 [ 23.901094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.901844] ? mtree_range_walk+0x632/0x900 [ 23.902523] ? mas_walk+0x5c7/0x7c0 [ 23.903139] do_vmi_munmap+0x1f1/0x2b0 [ 23.903703] mmap_region+0x1f9/0x2660 [ 23.904193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.904708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.905422] ? __pfx_lock_acquire+0x10/0x10 [ 23.905977] ? __pfx_mmap_region+0x10/0x10 [ 23.906528] ? security_mmap_addr+0x7d/0xa0 [ 23.907096] ? get_unmapped_area+0x1f5/0x3f0 [ 23.907651] do_mmap+0x854/0xf00 [ 23.908095] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.908604] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.909181] ksys_mmap_pgoff+0x3af/0x500 [ 23.909696] do_syscall_64+0x3f/0x90 [ 23.910182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.910849] RIP: 0033:0x7f749029bd82 [ 23.911335] 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 [ 23.913504] RSP: 002b:00007ffe2d6ee748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.914423] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f749029bd82 [ 23.915282] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f748f6d5000 [ 23.916144] RBP: 00007f748f6d5000 R08: 0000000000000009 R09: 0000000000001000 [ 23.917008] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c18a965ec0 [ 23.917871] R13: 00007ffe2d6ee760 R14: 00007ffe2d6ee790 R15: 00007ffe2d6eeaf0 [ 23.918780] [ 23.919101] [ 23.919318] Allocated by task 213: [ 23.919771] kasan_save_stack+0x22/0x50 [ 23.920279] kasan_set_track+0x25/0x30 [ 23.920776] __kasan_slab_alloc+0x59/0x70 [ 23.921312] kmem_cache_alloc+0x16b/0x370 [ 23.921847] vm_area_dup+0x20/0x160 [ 23.922314] __split_vma+0x170/0x950 [ 23.922791] split_vma+0xc6/0x110 [ 23.923253] mprotect_fixup+0x8d2/0xb30 [ 23.923774] do_mprotect_pkey+0x87e/0xd40 [ 23.924305] __x64_sys_mprotect+0x78/0xc0 [ 23.924864] do_syscall_64+0x3f/0x90 [ 23.925344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.926003] [ 23.926223] Freed by task 213: [ 23.926626] kasan_save_stack+0x22/0x50 [ 23.927161] kasan_set_track+0x25/0x30 [ 23.927661] kasan_save_free_info+0x2b/0x50 [ 23.928197] __kasan_slab_free+0x10a/0x190 [ 23.928732] kmem_cache_free+0x10d/0x4d0 [ 23.929245] rcu_core+0x8c8/0x2860 [ 23.929701] __do_softirq+0x1b7/0x7d4 [ 23.930259] [ 23.930482] Last potentially related work creation: [ 23.931094] kasan_save_stack+0x22/0x50 [ 23.931594] __kasan_record_aux_stack+0x8e/0xa0 [ 23.932190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.932847] remove_vma+0x139/0x170 [ 23.933305] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.933852] do_vmi_munmap+0x1f1/0x2b0 [ 23.934329] __vm_munmap+0x138/0x3a0 [ 23.934801] __x64_sys_munmap+0x59/0x80 [ 23.935308] do_syscall_64+0x3f/0x90 [ 23.935794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.936473] [ 23.936695] The buggy address belongs to the object at ffff88800f7633a0 [ 23.936695] which belongs to the cache vm_area_struct of size 168 [ 23.938200] The buggy address is located 88 bytes inside of [ 23.938200] freed 168-byte region [ffff88800f7633a0, ffff88800f763448) [ 23.939652] [ 23.939882] The buggy address belongs to the physical page: [ 23.940552] page:00000000eab13603 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf763 [ 23.941673] memcg:ffff88801630bb01 [ 23.942110] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.942800] page_type: 0xffffffff() [ 23.943263] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.944190] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801630bb01 [ 23.945101] page dumped because: kasan: bad access detected [ 23.945757] [ 23.945984] Memory state around the buggy address: [ 23.946585] ffff88800f763280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.947506] ffff88800f763300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.948385] >ffff88800f763380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.949240] ^ [ 23.950092] ffff88800f763400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.950999] ffff88800f763480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.951886] ================================================================== [ 23.952882] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.200049] BUG: Bad rss-counter state mm:000000002e31cbd7 type:MM_FILEPAGES val:33 [ 26.201212] BUG: Bad rss-counter state mm:000000002e31cbd7 type:MM_ANONPAGES val:22 [ 26.627886] BUG: Bad rss-counter state mm:00000000335798ec type:MM_FILEPAGES val:33 [ 26.628925] BUG: Bad rss-counter state mm:00000000335798ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43125' (ECDSA) to the list of known hosts. 2023/06/21 02:41:35 fuzzer started 2023/06/21 02:41:36 dialing manager at localhost:36067 2023/06/21 02:41:36 checking machine... 2023/06/21 02:41:36 checking revisions... [ 27.393099] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:41:36 testing simple program... [ 27.437883] cgroup: Unknown subsys name 'net' [ 27.500497] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:41:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880162df8f0 RCX=ffffffff863b3501 RDX=1ffff11002c5bf20 RSI=ffffffff8450cc7f RDI=ffff8880162df900 RBP=ffff8880162df8c0 RSP=ffff8880162df808 R8 =ffffffff863b3588 R9 =ffff8880162df868 R10=0000000000038001 R11=000000000008a96a R12=ffff8880162df8f0 R13=0000000000000000 R14=ffff888017f18000 R15=0000000000092cc0 RIP=ffffffff813ad496 RFL=00000292 [--S-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 00007f0d0df2c900 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=00007f0d0e4e3618 CR3=000000000f312000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f37490b37d0 CR3=000000000dab4000 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=c2973b4e1d901290c84e05f0c0b6b281 XMM02=000000000011d308ec2efd57dc4c00df XMM03=0000000000120fb0e1cfbad1d25427b8 XMM04=8d31721691e54e2e00000000000ae988 XMM05=19e9129bd510f2350000000000130b70 XMM06=c2a654221dc01846000000000012f5e0 XMM07=e042d86d42eb936e0000000000121288 XMM08=e1cfbad1d25427b8000000000011d368 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000