syzkaller login: [ 39.852238] BUG: Bad rss-counter state mm:00000000de400fee type:MM_FILEPAGES val:33 [ 39.853446] BUG: Bad rss-counter state mm:00000000de400fee type:MM_ANONPAGES val:22 [ 39.967986] ================================================================== [ 39.968882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.969842] Read of size 8 at addr ffff88801590c880 by task sshd/221 [ 39.970709] [ 39.970973] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.971842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.972817] Call Trace: [ 39.973146] [ 39.973438] dump_stack_lvl+0x91/0xf0 [ 39.973937] print_report+0xcc/0x620 [ 39.974426] ? __virt_addr_valid+0x102/0x340 [ 39.975001] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.975619] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.976238] kasan_report+0xbe/0xf0 [ 39.976719] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.977344] vma_interval_tree_remove+0xc75/0xec0 [ 39.977994] vma_prepare+0xc54/0x11a0 [ 39.978499] __split_vma+0x5af/0x950 [ 39.979014] ? __pfx___split_vma+0x10/0x10 [ 39.979581] ? find_held_lock+0x2c/0x110 [ 39.980139] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.980743] ? lock_is_held_type+0x9f/0x120 [ 39.981313] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.981956] ? mtree_range_walk+0x632/0x900 [ 39.982532] ? mas_walk+0x5c7/0x7c0 [ 39.983033] do_vmi_munmap+0x1f1/0x2b0 [ 39.983549] mmap_region+0x1f9/0x2660 [ 39.984067] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.984614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.985385] ? __pfx_lock_acquire+0x10/0x10 [ 39.985961] ? __pfx_mmap_region+0x10/0x10 [ 39.986527] ? security_mmap_addr+0x7d/0xa0 [ 39.987102] ? get_unmapped_area+0x1f5/0x3f0 [ 39.987694] do_mmap+0x854/0xf00 [ 39.988161] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.988696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.989291] ksys_mmap_pgoff+0x3af/0x500 [ 39.989824] do_syscall_64+0x3f/0x90 [ 39.990325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.991042] RIP: 0033:0x7f4a0404bd82 [ 39.991528] 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 [ 39.993819] RSP: 002b:00007ffec98fa6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.994789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a0404bd82 [ 39.995700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a03485000 [ 39.996610] RBP: 00007f4a03485000 R08: 0000000000000009 R09: 0000000000001000 [ 39.997513] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d63c42ec0 [ 39.998426] R13: 00007ffec98fa6f0 R14: 00007ffec98fa720 R15: 00007ffec98faa80 [ 39.999353] [ 39.999658] [ 39.999880] Allocated by task 214: [ 40.000341] kasan_save_stack+0x22/0x50 [ 40.000869] kasan_set_track+0x25/0x30 [ 40.001393] __kasan_slab_alloc+0x59/0x70 [ 40.001957] kmem_cache_alloc+0x16b/0x370 [ 40.002496] vm_area_dup+0x20/0x160 [ 40.002989] __split_vma+0x170/0x950 [ 40.003481] split_vma+0xc6/0x110 [ 40.003948] mprotect_fixup+0x8d2/0xb30 [ 40.004488] do_mprotect_pkey+0x87e/0xd40 [ 40.005045] __x64_sys_mprotect+0x78/0xc0 [ 40.005598] do_syscall_64+0x3f/0x90 [ 40.006099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.006782] [ 40.007014] Freed by task 214: [ 40.007436] kasan_save_stack+0x22/0x50 [ 40.007981] kasan_set_track+0x25/0x30 [ 40.008500] kasan_save_free_info+0x2b/0x50 [ 40.009074] __kasan_slab_free+0x10a/0x190 [ 40.009654] kmem_cache_free+0x10d/0x4d0 [ 40.010202] rcu_core+0x8c8/0x2860 [ 40.010676] __do_softirq+0x1b7/0x7d4 [ 40.011198] [ 40.011424] Last potentially related work creation: [ 40.012107] kasan_save_stack+0x22/0x50 [ 40.012645] __kasan_record_aux_stack+0x8e/0xa0 [ 40.013265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.013956] remove_vma+0x139/0x170 [ 40.014436] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.015041] do_vmi_munmap+0x1f1/0x2b0 [ 40.015560] __vm_munmap+0x138/0x3a0 [ 40.016050] __x64_sys_munmap+0x59/0x80 [ 40.016571] do_syscall_64+0x3f/0x90 [ 40.017078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.017754] [ 40.017982] The buggy address belongs to the object at ffff88801590c828 [ 40.017982] which belongs to the cache vm_area_struct of size 168 [ 40.019562] The buggy address is located 88 bytes inside of [ 40.019562] freed 168-byte region [ffff88801590c828, ffff88801590c8d0) [ 40.021080] [ 40.021306] The buggy address belongs to the physical page: [ 40.022004] page:000000006b2ea964 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1590c [ 40.023164] memcg:ffff88801987c201 [ 40.023612] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.024304] page_type: 0xffffffff() [ 40.024785] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.025768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801987c201 [ 40.026733] page dumped because: kasan: bad access detected [ 40.027440] [ 40.027665] Memory state around the buggy address: [ 40.028291] ffff88801590c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.029211] ffff88801590c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.030131] >ffff88801590c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.031062] ^ [ 40.031496] ffff88801590c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.032412] ffff88801590c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 40.033325] ================================================================== [ 40.034333] Disabling lock debugging due to kernel taint [ 42.165346] BUG: Bad rss-counter state mm:000000002863d6eb type:MM_FILEPAGES val:33 [ 42.167062] BUG: Bad rss-counter state mm:000000002863d6eb type:MM_ANONPAGES val:22 [ 42.625356] BUG: Bad rss-counter state mm:00000000fd3ed472 type:MM_FILEPAGES val:33 [ 42.626508] BUG: Bad rss-counter state mm:00000000fd3ed472 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30180' (ECDSA) to the list of known hosts. 2023/06/19 23:36:44 fuzzer started 2023/06/19 23:36:44 dialing manager at localhost:44161 2023/06/19 23:36:44 checking machine... 2023/06/19 23:36:44 checking revisions... [ 43.463222] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:36:44 testing simple program... [ 43.515811] cgroup: Unknown subsys name 'net' [ 43.565840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=ffffffff8182da89 RBP=ffff888016df8000 RSP=ffff888016bc7cb8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=ffff88800a75cf00 R14=0000000000000cc0 R15=ffff888016df8000 RIP=ffffffff81534337 RFL=00000046 [---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 00007fd359d73900 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=00007ffdaa3cd000 CR3=0000000016b9c000 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=ffff888008c58400 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=00007f48c4aea4c0 CR3=000000000d58c000 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=388a6e34c4758aa0674dc93d8a3e59c4 XMM02=000000000011c4e8ec2efd57dc4c00df XMM03=0000000000123950ef60ccaea947d959 XMM04=321f1f2811aea81500000000000ae988 XMM05=e4cb8bb95a7664b600000000001334d0 XMM06=4fb48f4d073b026b0000000000132338 XMM07=e042d86d42eb936e0000000000123bd0 XMM08=ef60ccaea947d959000000000011c548 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000