syzkaller login: [ 28.886281] BUG: Bad rss-counter state mm:00000000b71737cd type:MM_FILEPAGES val:33 [ 28.887738] BUG: Bad rss-counter state mm:00000000b71737cd type:MM_ANONPAGES val:22 [ 29.030669] ================================================================== [ 29.031666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.032601] Read of size 8 at addr ffff88800b81a3f8 by task sshd/220 [ 29.033516] [ 29.033732] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.034608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.035621] Call Trace: [ 29.035937] [ 29.036226] dump_stack_lvl+0x91/0xf0 [ 29.036715] print_report+0xcc/0x620 [ 29.037199] ? __virt_addr_valid+0x102/0x340 [ 29.037747] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.038359] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.038996] kasan_report+0xbe/0xf0 [ 29.039470] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.040084] vma_interval_tree_remove+0xc75/0xec0 [ 29.040698] vma_prepare+0xc54/0x11a0 [ 29.041175] __split_vma+0x5af/0x950 [ 29.041641] ? __pfx___split_vma+0x10/0x10 [ 29.042171] ? find_held_lock+0x2c/0x110 [ 29.042707] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.043276] ? lock_is_held_type+0x9f/0x120 [ 29.043821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.044435] ? mtree_range_walk+0x632/0x900 [ 29.044985] ? mas_walk+0x5c7/0x7c0 [ 29.045462] do_vmi_munmap+0x1f1/0x2b0 [ 29.045952] mmap_region+0x1f9/0x2660 [ 29.046439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.046962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.047681] ? __pfx_lock_acquire+0x10/0x10 [ 29.048214] ? __pfx_mmap_region+0x10/0x10 [ 29.048744] ? security_mmap_addr+0x7d/0xa0 [ 29.049295] ? get_unmapped_area+0x1f5/0x3f0 [ 29.049834] do_mmap+0x854/0xf00 [ 29.050275] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.050788] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.051358] ksys_mmap_pgoff+0x3af/0x500 [ 29.051863] do_syscall_64+0x3f/0x90 [ 29.052344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.052990] RIP: 0033:0x7f11e7a01d82 [ 29.053446] 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 [ 29.055573] RSP: 002b:00007ffd67b74118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.056477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11e7a01d82 [ 29.057324] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11e6e3b000 [ 29.058186] RBP: 00007f11e6e3b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.059035] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f6b7e8ec0 [ 29.059887] R13: 00007ffd67b74130 R14: 00007ffd67b74160 R15: 00007ffd67b744c0 [ 29.060753] [ 29.061053] [ 29.061278] Allocated by task 213: [ 29.061710] kasan_save_stack+0x22/0x50 [ 29.062223] kasan_set_track+0x25/0x30 [ 29.062739] __kasan_slab_alloc+0x59/0x70 [ 29.063265] kmem_cache_alloc+0x16b/0x370 [ 29.063793] vm_area_dup+0x20/0x160 [ 29.064252] __split_vma+0x170/0x950 [ 29.064719] split_vma+0xc6/0x110 [ 29.065157] mprotect_fixup+0x8d2/0xb30 [ 29.065667] do_mprotect_pkey+0x87e/0xd40 [ 29.066197] __x64_sys_mprotect+0x78/0xc0 [ 29.066736] do_syscall_64+0x3f/0x90 [ 29.067207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.067842] [ 29.068057] Freed by task 213: [ 29.068455] kasan_save_stack+0x22/0x50 [ 29.068956] kasan_set_track+0x25/0x30 [ 29.069456] kasan_save_free_info+0x2b/0x50 [ 29.069989] __kasan_slab_free+0x10a/0x190 [ 29.070516] kmem_cache_free+0x10d/0x4d0 [ 29.071044] rcu_core+0x8c8/0x2860 [ 29.071489] __do_softirq+0x1b7/0x7d4 [ 29.071969] [ 29.072183] Last potentially related work creation: [ 29.072774] kasan_save_stack+0x22/0x50 [ 29.073274] __kasan_record_aux_stack+0x8e/0xa0 [ 29.073931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.074581] remove_vma+0x139/0x170 [ 29.075032] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.075587] do_vmi_munmap+0x1f1/0x2b0 [ 29.076074] __vm_munmap+0x138/0x3a0 [ 29.076537] __x64_sys_munmap+0x59/0x80 [ 29.077034] do_syscall_64+0x3f/0x90 [ 29.077500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.078136] [ 29.078351] The buggy address belongs to the object at ffff88800b81a3a0 [ 29.078351] which belongs to the cache vm_area_struct of size 168 [ 29.079816] The buggy address is located 88 bytes inside of [ 29.079816] freed 168-byte region [ffff88800b81a3a0, ffff88800b81a448) [ 29.081211] [ 29.081426] The buggy address belongs to the physical page: [ 29.082083] page:00000000195c0a31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb81a [ 29.083209] memcg:ffff88800cf12201 [ 29.083666] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.084361] page_type: 0xffffffff() [ 29.084843] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.085830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf12201 [ 29.086828] page dumped because: kasan: bad access detected [ 29.087531] [ 29.087747] Memory state around the buggy address: [ 29.088349] ffff88800b81a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.089203] ffff88800b81a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.090067] >ffff88800b81a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.090941] ^ [ 29.091800] ffff88800b81a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.092660] ffff88800b81a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.093512] ================================================================== [ 29.094534] Disabling lock debugging due to kernel taint [ 31.086197] BUG: Bad rss-counter state mm:000000009512f65f type:MM_FILEPAGES val:33 [ 31.087434] BUG: Bad rss-counter state mm:000000009512f65f type:MM_ANONPAGES val:22 [ 31.498989] BUG: Bad rss-counter state mm:000000007306442c type:MM_FILEPAGES val:33 [ 31.500293] BUG: Bad rss-counter state mm:000000007306442c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33071' (ECDSA) to the list of known hosts. 2023/06/19 18:54:49 fuzzer started 2023/06/19 18:54:49 dialing manager at localhost:44161 2023/06/19 18:54:49 checking machine... 2023/06/19 18:54:49 checking revisions... [ 32.265134] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:54:49 testing simple program... [ 32.336325] cgroup: Unknown subsys name 'net' [ 32.396407] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:48 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652a88 RCX=0000000080000000 RDX=1ffffffff0aca551 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f237398 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88801674f260 RIP=ffffffff814c07f1 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 00007fd5ad1b8900 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=00007fff1dab3000 CR3=000000000c9ce000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007ff06816e470 CR3=000000000c808000 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=1a1a5d5d6fb8948bdc45ca6851dd6169 XMM02=000000000011cf78ec2efd57dc4c00df XMM03=00000000001243983120ab4098b27863 XMM04=aa58596f407febb800000000000ae988 XMM05=19e9129bd510f2350000000000133f10 XMM06=f6f7fad4d772013d0000000000132d78 XMM07=e042d86d42eb936e0000000000124618 XMM08=3120ab4098b27863000000000011cfd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000