[ 30.574768] BUG: Bad rss-counter state mm:0000000058711ef2 type:MM_FILEPAGES val:33 [ 30.576558] BUG: Bad rss-counter state mm:0000000058711ef2 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.739961] ================================================================== [ 30.741047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.741990] Read of size 8 at addr ffff88800e773df0 by task sshd/219 [ 30.742896] [ 30.743136] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.744084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.745178] Call Trace: [ 30.745534] [ 30.745849] dump_stack_lvl+0x91/0xf0 [ 30.746387] print_report+0xcc/0x620 [ 30.746913] ? __virt_addr_valid+0x102/0x340 [ 30.747527] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748891] kasan_report+0xbe/0xf0 [ 30.749428] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750141] vma_interval_tree_remove+0xc75/0xec0 [ 30.750830] vma_prepare+0xc54/0x11a0 [ 30.751368] __split_vma+0x5af/0x950 [ 30.751899] ? __pfx___split_vma+0x10/0x10 [ 30.752545] ? find_held_lock+0x2c/0x110 [ 30.753145] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.753798] ? lock_is_held_type+0x9f/0x120 [ 30.754430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755119] ? mtree_range_walk+0x632/0x900 [ 30.755754] ? mas_walk+0x5c7/0x7c0 [ 30.756312] do_vmi_munmap+0x1f1/0x2b0 [ 30.756885] mmap_region+0x1f9/0x2660 [ 30.757438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758021] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.758847] ? __pfx_lock_acquire+0x10/0x10 [ 30.759466] ? __pfx_mmap_region+0x10/0x10 [ 30.760091] ? security_mmap_addr+0x7d/0xa0 [ 30.760721] ? get_unmapped_area+0x1f5/0x3f0 [ 30.761368] do_mmap+0x854/0xf00 [ 30.761873] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.762448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.763100] ksys_mmap_pgoff+0x3af/0x500 [ 30.763695] do_syscall_64+0x3f/0x90 [ 30.764251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765025] RIP: 0033:0x7fbdaf831d82 [ 30.765546] 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 [ 30.767982] RSP: 002b:00007ffdba9ea298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.769047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbdaf831d82 [ 30.770021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbdaec6b000 [ 30.771001] RBP: 00007fbdaec6b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.771970] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564883571f70 [ 30.772959] R13: 00007ffdba9ea2b0 R14: 00007ffdba9ea2e0 R15: 00007ffdba9ea640 [ 30.773956] [ 30.774291] [ 30.774537] Allocated by task 212: [ 30.775040] kasan_save_stack+0x22/0x50 [ 30.775616] kasan_set_track+0x25/0x30 [ 30.776180] __kasan_slab_alloc+0x59/0x70 [ 30.776814] kmem_cache_alloc+0x16b/0x370 [ 30.777419] vm_area_dup+0x20/0x160 [ 30.777947] __split_vma+0x170/0x950 [ 30.778487] split_vma+0xc6/0x110 [ 30.778999] mprotect_fixup+0x8d2/0xb30 [ 30.779578] do_mprotect_pkey+0x87e/0xd40 [ 30.780184] __x64_sys_mprotect+0x78/0xc0 [ 30.780795] do_syscall_64+0x3f/0x90 [ 30.781343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782082] [ 30.782330] Freed by task 203: [ 30.782781] kasan_save_stack+0x22/0x50 [ 30.783359] kasan_set_track+0x25/0x30 [ 30.783937] kasan_save_free_info+0x2b/0x50 [ 30.784557] __kasan_slab_free+0x10a/0x190 [ 30.785182] kmem_cache_free+0x10d/0x4d0 [ 30.785765] rcu_core+0x8c8/0x2860 [ 30.786273] __do_softirq+0x1b7/0x7d4 [ 30.786822] [ 30.787077] Last potentially related work creation: [ 30.787751] kasan_save_stack+0x22/0x50 [ 30.788319] __kasan_record_aux_stack+0x8e/0xa0 [ 30.789001] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.789755] remove_vma+0x139/0x170 [ 30.790293] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.790939] do_vmi_munmap+0x1f1/0x2b0 [ 30.791501] __vm_munmap+0x138/0x3a0 [ 30.792035] __x64_sys_munmap+0x59/0x80 [ 30.792635] do_syscall_64+0x3f/0x90 [ 30.793191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793939] [ 30.794189] Second to last potentially related work creation: [ 30.794994] kasan_save_stack+0x22/0x50 [ 30.795580] __kasan_record_aux_stack+0x8e/0xa0 [ 30.796244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.797008] remove_vma+0x139/0x170 [ 30.797521] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.798174] do_vmi_munmap+0x1f1/0x2b0 [ 30.798734] mmap_region+0x1f9/0x2660 [ 30.799289] do_mmap+0x854/0xf00 [ 30.799783] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.800365] ksys_mmap_pgoff+0x3af/0x500 [ 30.800971] do_syscall_64+0x3f/0x90 [ 30.801529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802274] [ 30.802521] The buggy address belongs to the object at ffff88800e773d98 [ 30.802521] which belongs to the cache vm_area_struct of size 168 [ 30.804197] The buggy address is located 88 bytes inside of [ 30.804197] freed 168-byte region [ffff88800e773d98, ffff88800e773e40) [ 30.805839] [ 30.806095] The buggy address belongs to the physical page: [ 30.806840] page:0000000036b2ba2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe773 [ 30.808094] memcg:ffff88800eb92a01 [ 30.808604] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.809352] page_type: 0xffffffff() [ 30.809868] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c33c0 dead000000000004 [ 30.810930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb92a01 [ 30.811970] page dumped because: kasan: bad access detected [ 30.812854] [ 30.813123] Memory state around the buggy address: [ 30.813825] ffff88800e773c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.814882] ffff88800e773d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.815939] >ffff88800e773d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.817025] ^ [ 30.818022] ffff88800e773e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.819067] ffff88800e773e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.820113] ================================================================== [ 30.821333] Disabling lock debugging due to kernel taint [ 32.687743] BUG: Bad rss-counter state mm:0000000046c606de type:MM_FILEPAGES val:33 [ 32.688763] BUG: Bad rss-counter state mm:0000000046c606de type:MM_ANONPAGES val:22 [ 33.138720] BUG: Bad rss-counter state mm:000000007ffa9c61 type:MM_FILEPAGES val:33 [ 33.139677] BUG: Bad rss-counter state mm:000000007ffa9c61 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61136' (ECDSA) to the list of known hosts. 2023/06/21 06:19:47 fuzzer started 2023/06/21 06:19:47 dialing manager at localhost:36067 2023/06/21 06:19:47 checking machine... 2023/06/21 06:19:47 checking revisions... [ 33.933408] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:19:47 testing simple program... [ 33.986052] cgroup: Unknown subsys name 'net' [ 34.035203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8614386c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888017d278d0 RSP=ffff888017d27808 R8 =ffffffff86143870 R9 =ffff888017d278b8 R10=0000000000038001 R11=00000000000229dd R12=ffff888017d278d8 R13=ffff888017d278c0 R14=ffff888017d27d98 R15=ffff888017d27878 RIP=ffffffff81130bb0 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 00007f0205065900 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=00007f020561a650 CR3=000000001beca000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008df7e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011befd3 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=00007ffe78b6bfe8 CR3=000000000e8fa000 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=2036343a39313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a39313a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000