syzkaller login: [ 30.418760] BUG: Bad rss-counter state mm:000000000b4fee12 type:MM_FILEPAGES val:33 [ 30.419950] BUG: Bad rss-counter state mm:000000000b4fee12 type:MM_ANONPAGES val:22 [ 30.461690] ================================================================== [ 30.462896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.464271] Read of size 8 at addr ffff8880096885c8 by task sshd/220 [ 30.465135] [ 30.465371] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.466397] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.467544] Call Trace: [ 30.467916] [ 30.468278] dump_stack_lvl+0x91/0xf0 [ 30.468872] print_report+0xcc/0x620 [ 30.469395] ? __virt_addr_valid+0x102/0x340 [ 30.469985] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.470644] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.471310] kasan_report+0xbe/0xf0 [ 30.471841] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.472511] vma_interval_tree_remove+0xc75/0xec0 [ 30.473170] vma_prepare+0xc54/0x11a0 [ 30.473692] __split_vma+0x5af/0x950 [ 30.474212] ? __pfx___split_vma+0x10/0x10 [ 30.474784] ? find_held_lock+0x2c/0x110 [ 30.475351] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.475973] ? lock_is_held_type+0x9f/0x120 [ 30.476574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.477237] ? mtree_range_walk+0x632/0x900 [ 30.477843] ? mas_walk+0x5c7/0x7c0 [ 30.478368] do_vmi_munmap+0x1f1/0x2b0 [ 30.478919] mmap_region+0x1f9/0x2660 [ 30.479464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.480029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.480814] ? __pfx_lock_acquire+0x10/0x10 [ 30.481405] ? __pfx_mmap_region+0x10/0x10 [ 30.481983] ? security_mmap_addr+0x7d/0xa0 [ 30.482581] ? get_unmapped_area+0x1f5/0x3f0 [ 30.483182] do_mmap+0x854/0xf00 [ 30.483683] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.484219] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.484866] ksys_mmap_pgoff+0x3af/0x500 [ 30.485434] do_syscall_64+0x3f/0x90 [ 30.485957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.486671] RIP: 0033:0x7f474b52bd82 [ 30.487195] 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 [ 30.489503] RSP: 002b:00007ffcdfc09978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.490487] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f474b52bd82 [ 30.491400] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f474a965000 [ 30.492335] RBP: 00007f474a965000 R08: 0000000000000009 R09: 0000000000001000 [ 30.493234] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb16197ec0 [ 30.494147] R13: 00007ffcdfc09990 R14: 00007ffcdfc099c0 R15: 00007ffcdfc09d20 [ 30.495079] [ 30.495391] [ 30.495635] Allocated by task 213: [ 30.496122] kasan_save_stack+0x22/0x50 [ 30.496673] kasan_set_track+0x25/0x30 [ 30.497197] __kasan_slab_alloc+0x59/0x70 [ 30.497762] kmem_cache_alloc+0x16b/0x370 [ 30.498326] vm_area_dup+0x20/0x160 [ 30.498837] __split_vma+0x170/0x950 [ 30.499351] split_vma+0xc6/0x110 [ 30.499850] mprotect_fixup+0x8d2/0xb30 [ 30.500394] do_mprotect_pkey+0x87e/0xd40 [ 30.500969] __x64_sys_mprotect+0x78/0xc0 [ 30.501527] do_syscall_64+0x3f/0x90 [ 30.502041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.502757] [ 30.503002] Freed by task 213: [ 30.503441] kasan_save_stack+0x22/0x50 [ 30.503996] kasan_set_track+0x25/0x30 [ 30.504557] kasan_save_free_info+0x2b/0x50 [ 30.505224] __kasan_slab_free+0x10a/0x190 [ 30.505837] kmem_cache_free+0x10d/0x4d0 [ 30.506420] rcu_core+0x8c8/0x2860 [ 30.506930] __do_softirq+0x1b7/0x7d4 [ 30.507476] [ 30.507739] Last potentially related work creation: [ 30.508411] kasan_save_stack+0x22/0x50 [ 30.508997] __kasan_record_aux_stack+0x8e/0xa0 [ 30.509656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.510390] remove_vma+0x139/0x170 [ 30.510907] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.511547] do_vmi_munmap+0x1f1/0x2b0 [ 30.512117] __vm_munmap+0x138/0x3a0 [ 30.512656] __x64_sys_munmap+0x59/0x80 [ 30.513230] do_syscall_64+0x3f/0x90 [ 30.513774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.514513] [ 30.514757] Second to last potentially related work creation: [ 30.515548] kasan_save_stack+0x22/0x50 [ 30.516134] __kasan_record_aux_stack+0x8e/0xa0 [ 30.516791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.517530] remove_vma+0x139/0x170 [ 30.518052] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.518692] do_vmi_munmap+0x1f1/0x2b0 [ 30.519249] mmap_region+0x1f9/0x2660 [ 30.519813] do_mmap+0x854/0xf00 [ 30.520307] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.520865] ksys_mmap_pgoff+0x7d/0x500 [ 30.521434] do_syscall_64+0x3f/0x90 [ 30.521979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.522719] [ 30.522963] The buggy address belongs to the object at ffff888009688570 [ 30.522963] which belongs to the cache vm_area_struct of size 168 [ 30.524664] The buggy address is located 88 bytes inside of [ 30.524664] freed 168-byte region [ffff888009688570, ffff888009688618) [ 30.526283] [ 30.526532] The buggy address belongs to the physical page: [ 30.527291] page:000000001b7926ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9688 [ 30.528548] memcg:ffff88800e308e01 [ 30.529043] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.529784] page_type: 0xffffffff() [ 30.530299] raw: 0100000000000200 ffff8880087a0c80 ffffea0000403940 dead00000000000a [ 30.531354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e308e01 [ 30.532426] page dumped because: kasan: bad access detected [ 30.533185] [ 30.533429] Memory state around the buggy address: [ 30.534101] ffff888009688480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.535084] ffff888009688500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.536077] >ffff888009688580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.537054] ^ [ 30.537818] ffff888009688600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.538774] ffff888009688680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.539702] ================================================================== [ 30.540995] Disabling lock debugging due to kernel taint [ 32.512893] BUG: Bad rss-counter state mm:00000000333531b4 type:MM_FILEPAGES val:33 [ 32.514359] BUG: Bad rss-counter state mm:00000000333531b4 type:MM_ANONPAGES val:22 [ 33.088714] BUG: Bad rss-counter state mm:0000000035db9842 type:MM_FILEPAGES val:33 [ 33.089901] BUG: Bad rss-counter state mm:0000000035db9842 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53763' (ECDSA) to the list of known hosts. 2023/06/20 10:58:02 fuzzer started 2023/06/20 10:58:03 dialing manager at localhost:36067 2023/06/20 10:58:03 checking machine... 2023/06/20 10:58:03 checking revisions... [ 33.740113] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:58:03 testing simple program... [ 33.783018] cgroup: Unknown subsys name 'net' [ 33.831017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000078aec5bb RCX=ffff88806cb62dd8 RDX=000000000000000e RSI=ffffffff816cb50b RDI=00000000852c7cf3 RBP=ffff88800e63b100 RSP=ffff888016d07570 R8 =00000000414c329c R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000800 R14=ffff888016d075f8 R15=000000000000000e RIP=ffffffff822704fc 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 00007f138022a700 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=00007f3413af9618 CR3=000000000eefe000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032303a3835 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323834 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=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=00007fd4ccd3aaa0 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=b7e5e0182cbf3e9d8e4a16d0b68b2f0a XMM02=ec2efd57dc4c00df0000000000119840 XMM03=b7e6e4a345bde6ac0000000000119910 XMM04=562c1e1b0f89abcb00000000000ae988 XMM05=19e9129bd510f2350000000000132080 XMM06=69119b6b0b4a50390000000000131678 XMM07=e042d86d42eb936e00000000001210a8 XMM08=b7e6e4a345bde6ac0000000000119910 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000