syzkaller login: [ 32.544937] BUG: Bad rss-counter state mm:000000007dd463f1 type:MM_FILEPAGES val:33 [ 32.545789] BUG: Bad rss-counter state mm:000000007dd463f1 type:MM_ANONPAGES val:22 [ 32.665778] ================================================================== [ 32.666433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.667071] Read of size 8 at addr ffff88801a22dc20 by task sshd/220 [ 32.667576] [ 32.667725] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.668325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.669057] Call Trace: [ 32.669278] <TASK> [ 32.669478] dump_stack_lvl+0x91/0xf0 [ 32.669825] print_report+0xcc/0x620 [ 32.670315] ? __virt_addr_valid+0x102/0x340 [ 32.670717] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.671171] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.671599] kasan_report+0xbe/0xf0 [ 32.671936] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.672380] vma_interval_tree_remove+0xc75/0xec0 [ 32.672795] vma_prepare+0xc54/0x11a0 [ 32.673166] __split_vma+0x5af/0x950 [ 32.673482] ? __pfx___split_vma+0x10/0x10 [ 32.673833] ? find_held_lock+0x2c/0x110 [ 32.674223] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.674615] ? lock_is_held_type+0x9f/0x120 [ 32.675005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.675413] ? mtree_range_walk+0x632/0x900 [ 32.675776] ? mas_walk+0x5c7/0x7c0 [ 32.676077] do_vmi_munmap+0x1f1/0x2b0 [ 32.676391] mmap_region+0x1f9/0x2660 [ 32.676700] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.677080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.677542] ? __pfx_lock_acquire+0x10/0x10 [ 32.677901] ? __pfx_mmap_region+0x10/0x10 [ 32.678247] ? security_mmap_addr+0x7d/0xa0 [ 32.678588] ? get_unmapped_area+0x1f5/0x3f0 [ 32.678950] do_mmap+0x854/0xf00 [ 32.679236] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.679559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.679923] ksys_mmap_pgoff+0x3af/0x500 [ 32.680262] do_syscall_64+0x3f/0x90 [ 32.680581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.681062] RIP: 0033:0x7f8df4e7ad82 [ 32.681375] 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 [ 32.682789] RSP: 002b:00007ffc0b39ff48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.683365] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8df4e7ad82 [ 32.683904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8df42b4000 [ 32.684459] RBP: 00007f8df42b4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.685016] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611bd07cb20 [ 32.685569] R13: 00007ffc0b39ff60 R14: 00007ffc0b39ff90 R15: 00007ffc0b3a02f0 [ 32.686145] </TASK> [ 32.686332] [ 32.686466] Allocated by task 213: [ 32.686752] kasan_save_stack+0x22/0x50 [ 32.687092] kasan_set_track+0x25/0x30 [ 32.687395] __kasan_slab_alloc+0x59/0x70 [ 32.687718] kmem_cache_alloc+0x16b/0x370 [ 32.688053] vm_area_dup+0x20/0x160 [ 32.688354] __split_vma+0x170/0x950 [ 32.688669] split_vma+0xc6/0x110 [ 32.688989] mprotect_fixup+0x8d2/0xb30 [ 32.689314] do_mprotect_pkey+0x87e/0xd40 [ 32.689652] __x64_sys_mprotect+0x78/0xc0 [ 32.689989] do_syscall_64+0x3f/0x90 [ 32.690293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.690703] [ 32.690840] Freed by task 213: [ 32.691095] kasan_save_stack+0x22/0x50 [ 32.691420] kasan_set_track+0x25/0x30 [ 32.691745] kasan_save_free_info+0x2b/0x50 [ 32.692085] __kasan_slab_free+0x10a/0x190 [ 32.692440] kmem_cache_free+0x10d/0x4d0 [ 32.692790] rcu_core+0x8c8/0x2860 [ 32.693114] __do_softirq+0x1b7/0x7d4 [ 32.693426] [ 32.693574] Last potentially related work creation: [ 32.693958] kasan_save_stack+0x22/0x50 [ 32.694285] __kasan_record_aux_stack+0x8e/0xa0 [ 32.694648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.695051] remove_vma+0x139/0x170 [ 32.695353] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.695727] do_vmi_munmap+0x1f1/0x2b0 [ 32.696044] __vm_munmap+0x138/0x3a0 [ 32.696343] __x64_sys_munmap+0x59/0x80 [ 32.696663] do_syscall_64+0x3f/0x90 [ 32.696988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.697402] [ 32.697540] The buggy address belongs to the object at ffff88801a22dbc8 [ 32.697540] which belongs to the cache vm_area_struct of size 168 [ 32.698487] The buggy address is located 88 bytes inside of [ 32.698487] freed 168-byte region [ffff88801a22dbc8, ffff88801a22dc70) [ 32.699385] [ 32.699523] The buggy address belongs to the physical page: [ 32.699948] page:00000000a72de755 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a22d [ 32.700664] memcg:ffff88800e11a801 [ 32.700977] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.701401] page_type: 0xffffffff() [ 32.701690] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.702315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e11a801 [ 32.702893] page dumped because: kasan: bad access detected [ 32.703317] [ 32.703454] Memory state around the buggy address: [ 32.703828] ffff88801a22db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.704375] ffff88801a22db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.704939] >ffff88801a22dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.705491] ^ [ 32.705823] ffff88801a22dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.706361] ffff88801a22dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.706898] ================================================================== [ 32.707793] Disabling lock debugging due to kernel taint [ 34.184493] BUG: Bad rss-counter state mm:00000000617da626 type:MM_FILEPAGES val:33 [ 34.185232] BUG: Bad rss-counter state mm:00000000617da626 type:MM_ANONPAGES val:22 [ 34.521895] BUG: Bad rss-counter state mm:000000002f95a119 type:MM_FILEPAGES val:33 [ 34.522572] BUG: Bad rss-counter state mm:000000002f95a119 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19203' (ECDSA) to the list of known hosts. 2023/06/20 09:52:24 fuzzer started 2023/06/20 09:52:24 dialing manager at localhost:44161 2023/06/20 09:52:24 checking machine... 2023/06/20 09:52:24 checking revisions... [ 35.053667] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:52:24 testing simple program... [ 35.088451] cgroup: Unknown subsys name 'net' [ 35.133589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:52:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff864b1158 RDX=ffff88806ce09ad8 RSI=1ffff1100d9c135a RDI=1ffff1100d9c135a RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff864b115c R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffffffff85407d68 R15=ffff88806ce09a78 RIP=ffffffff811310bc 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 0000000000000000 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=00007ffd76208c98 CR3=000000000ef24000 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=2034323a32353a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32353a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fb60fbbd300 CR3=000000000c584000 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=76f6458a077af1b77c4347b0561955e2 XMM02=000000000011d318ec2efd57dc4c00df XMM03=00000000001240c0842e322bb1f6e348 XMM04=b718b391618e284c00000000000ae988 XMM05=84637c714df7977d0000000000134a60 XMM06=c291bd5c70af25b90000000000133b00 XMM07=e042d86d42eb936e0000000000124340 XMM08=842e322bb1f6e348000000000011d378 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000