syzkaller login: [ 65.882945] BUG: Bad rss-counter state mm:00000000668f1580 type:MM_FILEPAGES val:31 [ 65.884138] BUG: Bad rss-counter state mm:00000000668f1580 type:MM_ANONPAGES val:22 [ 65.922143] ================================================================== [ 65.923089] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 65.924063] Read of size 8 at addr ffff88800c507798 by task sshd/225 [ 65.924847] [ 65.925064] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 65.925919] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 65.926901] Call Trace: [ 65.927213] [ 65.927499] dump_stack_lvl+0x91/0xf0 [ 65.927994] print_report+0xcc/0x620 [ 65.928474] ? __virt_addr_valid+0x102/0x340 [ 65.929026] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.929654] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.930264] kasan_report+0xbe/0xf0 [ 65.930736] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.931369] vma_interval_tree_remove+0xc75/0xec0 [ 65.931978] vma_prepare+0xc54/0x11a0 [ 65.932454] __split_vma+0x5af/0x950 [ 65.932926] ? __pfx___split_vma+0x10/0x10 [ 65.933475] ? find_held_lock+0x2c/0x110 [ 65.933991] do_vmi_align_munmap+0x2ba/0x11f0 [ 65.934558] ? lock_is_held_type+0x9f/0x120 [ 65.935100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 65.935707] ? mtree_range_walk+0x632/0x900 [ 65.936259] ? mas_walk+0x5c7/0x7c0 [ 65.936739] do_vmi_munmap+0x1f1/0x2b0 [ 65.937245] mmap_region+0x1f9/0x2660 [ 65.937725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 65.938236] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 65.938946] ? __pfx_lock_acquire+0x10/0x10 [ 65.939486] ? __pfx_mmap_region+0x10/0x10 [ 65.940017] ? security_mmap_addr+0x7d/0xa0 [ 65.940542] ? get_unmapped_area+0x1f5/0x3f0 [ 65.941090] do_mmap+0x854/0xf00 [ 65.941549] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.942042] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 65.942598] ksys_mmap_pgoff+0x3af/0x500 [ 65.943100] do_syscall_64+0x3f/0x90 [ 65.943581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.944225] RIP: 0033:0x7f2c09c43d82 [ 65.944689] 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 [ 65.946799] RSP: 002b:00007ffe137e6538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 65.947696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c09c43d82 [ 65.948533] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c0907d000 [ 65.949380] RBP: 00007f2c0907d000 R08: 0000000000000009 R09: 0000000000001000 [ 65.950216] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e461c4ec0 [ 65.951052] R13: 00007ffe137e6550 R14: 00007ffe137e6580 R15: 00007ffe137e68e0 [ 65.951894] [ 65.952188] [ 65.952405] Allocated by task 218: [ 65.952829] kasan_save_stack+0x22/0x50 [ 65.953344] kasan_set_track+0x25/0x30 [ 65.953830] __kasan_slab_alloc+0x59/0x70 [ 65.954354] kmem_cache_alloc+0x16b/0x370 [ 65.954866] vm_area_dup+0x20/0x160 [ 65.955319] __split_vma+0x170/0x950 [ 65.955784] split_vma+0xc6/0x110 [ 65.956222] mprotect_fixup+0x8d2/0xb30 [ 65.956721] do_mprotect_pkey+0x87e/0xd40 [ 65.957248] __x64_sys_mprotect+0x78/0xc0 [ 65.957769] do_syscall_64+0x3f/0x90 [ 65.958242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.958894] [ 65.959111] Freed by task 218: [ 65.959504] kasan_save_stack+0x22/0x50 [ 65.960012] kasan_set_track+0x25/0x30 [ 65.960508] kasan_save_free_info+0x2b/0x50 [ 65.961041] __kasan_slab_free+0x10a/0x190 [ 65.961594] kmem_cache_free+0x10d/0x4d0 [ 65.962094] rcu_core+0x8c8/0x2860 [ 65.962535] __do_softirq+0x1b7/0x7d4 [ 65.963012] [ 65.963227] Last potentially related work creation: [ 65.963808] kasan_save_stack+0x22/0x50 [ 65.964319] __kasan_record_aux_stack+0x8e/0xa0 [ 65.964892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 65.965548] remove_vma+0x139/0x170 [ 65.965998] do_vmi_align_munmap+0xd4a/0x11f0 [ 65.966551] do_vmi_munmap+0x1f1/0x2b0 [ 65.967041] __vm_munmap+0x138/0x3a0 [ 65.967512] __x64_sys_munmap+0x59/0x80 [ 65.968017] do_syscall_64+0x3f/0x90 [ 65.968491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.969142] [ 65.969381] The buggy address belongs to the object at ffff88800c507740 [ 65.969381] which belongs to the cache vm_area_struct of size 168 [ 65.970843] The buggy address is located 88 bytes inside of [ 65.970843] freed 168-byte region [ffff88800c507740, ffff88800c5077e8) [ 65.972232] [ 65.972448] The buggy address belongs to the physical page: [ 65.973095] page:0000000001fc4c81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc507 [ 65.974197] memcg:ffff88800ee9d501 [ 65.974620] flags: 0x100000000000200(slab|node=0|zone=1) [ 65.975261] page_type: 0xffffffff() [ 65.975711] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 65.976633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee9d501 [ 65.977544] page dumped because: kasan: bad access detected [ 65.978204] [ 65.978420] Memory state around the buggy address: [ 65.978996] ffff88800c507680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 65.979848] ffff88800c507700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 65.980695] >ffff88800c507780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 65.981560] ^ [ 65.982056] ffff88800c507800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 65.982908] ffff88800c507880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 65.983751] ================================================================== [ 65.984837] Disabling lock debugging due to kernel taint [ 67.805022] BUG: Bad rss-counter state mm:0000000003f943b6 type:MM_FILEPAGES val:33 [ 67.806116] BUG: Bad rss-counter state mm:0000000003f943b6 type:MM_ANONPAGES val:22 [ 68.275156] BUG: Bad rss-counter state mm:00000000d6955823 type:MM_FILEPAGES val:33 [ 68.276346] BUG: Bad rss-counter state mm:00000000d6955823 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61948' (ECDSA) to the list of known hosts. 2023/06/20 18:45:24 fuzzer started 2023/06/20 18:45:25 dialing manager at localhost:36067 2023/06/20 18:45:25 checking machine... 2023/06/20 18:45:25 checking revisions... [ 68.983948] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:45:25 testing simple program... [ 69.042045] cgroup: Unknown subsys name 'net' [ 69.099954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b38 RCX=0000000000000001 RDX=1ffff1100d9c1369 RSI=ffffffff81370a8a RDI=ffff88806ce09b48 RBP=ffff88806ce09b08 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888015e91b40 R15=ffff8880096297e8 RIP=ffffffff813ad496 RFL=00000286 [--S--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 00007f3e97fe5900 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=00007f3e9859c618 CR3=000000001a01a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007fff51ee7958 CR3=0000000015ece000 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=2034323a35343a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a35343a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000