syzkaller login: [ 39.226773] BUG: Bad rss-counter state mm:00000000f74ff6c5 type:MM_FILEPAGES val:33 [ 39.228029] BUG: Bad rss-counter state mm:00000000f74ff6c5 type:MM_ANONPAGES val:22 [ 39.382974] ================================================================== [ 39.383917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.384888] Read of size 8 at addr ffff8880169be798 by task sshd/220 [ 39.385841] [ 39.386062] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.386951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.387954] Call Trace: [ 39.388270] [ 39.388556] dump_stack_lvl+0x91/0xf0 [ 39.389046] print_report+0xcc/0x620 [ 39.389536] ? __virt_addr_valid+0x102/0x340 [ 39.390098] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.390764] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.391402] kasan_report+0xbe/0xf0 [ 39.391907] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.392544] vma_interval_tree_remove+0xc75/0xec0 [ 39.393141] vma_prepare+0xc54/0x11a0 [ 39.393621] __split_vma+0x5af/0x950 [ 39.394091] ? __pfx___split_vma+0x10/0x10 [ 39.394631] ? find_held_lock+0x2c/0x110 [ 39.395153] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.395718] ? lock_is_held_type+0x9f/0x120 [ 39.396251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.396854] ? mtree_range_walk+0x632/0x900 [ 39.397403] ? mas_walk+0x5c7/0x7c0 [ 39.397873] do_vmi_munmap+0x1f1/0x2b0 [ 39.398357] mmap_region+0x1f9/0x2660 [ 39.398859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.399368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.400082] ? __pfx_lock_acquire+0x10/0x10 [ 39.400611] ? __pfx_mmap_region+0x10/0x10 [ 39.401143] ? security_mmap_addr+0x7d/0xa0 [ 39.401672] ? get_unmapped_area+0x1f5/0x3f0 [ 39.402228] do_mmap+0x854/0xf00 [ 39.402688] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.403185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.403751] ksys_mmap_pgoff+0x3af/0x500 [ 39.404266] do_syscall_64+0x3f/0x90 [ 39.404753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.405401] RIP: 0033:0x7f87515b6d82 [ 39.405865] 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 [ 39.408010] RSP: 002b:00007ffda6a7e688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.408917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87515b6d82 [ 39.409782] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87509f0000 [ 39.410638] RBP: 00007f87509f0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.411493] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e1b80cec0 [ 39.412346] R13: 00007ffda6a7e6a0 R14: 00007ffda6a7e6d0 R15: 00007ffda6a7ea30 [ 39.413203] [ 39.413502] [ 39.413723] Allocated by task 213: [ 39.414151] kasan_save_stack+0x22/0x50 [ 39.414677] kasan_set_track+0x25/0x30 [ 39.415167] __kasan_slab_alloc+0x59/0x70 [ 39.415694] kmem_cache_alloc+0x16b/0x370 [ 39.416218] vm_area_dup+0x20/0x160 [ 39.416675] __split_vma+0x170/0x950 [ 39.417139] split_vma+0xc6/0x110 [ 39.417582] mprotect_fixup+0x8d2/0xb30 [ 39.418080] do_mprotect_pkey+0x87e/0xd40 [ 39.418615] __x64_sys_mprotect+0x78/0xc0 [ 39.419135] do_syscall_64+0x3f/0x90 [ 39.419607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.420245] [ 39.420464] Freed by task 213: [ 39.420860] kasan_save_stack+0x22/0x50 [ 39.421361] kasan_set_track+0x25/0x30 [ 39.421859] kasan_save_free_info+0x2b/0x50 [ 39.422411] __kasan_slab_free+0x10a/0x190 [ 39.422947] kmem_cache_free+0x10d/0x4d0 [ 39.423459] rcu_core+0x8c8/0x2860 [ 39.423909] __do_softirq+0x1b7/0x7d4 [ 39.424392] [ 39.424609] Last potentially related work creation: [ 39.425197] kasan_save_stack+0x22/0x50 [ 39.425699] __kasan_record_aux_stack+0x8e/0xa0 [ 39.426342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.427006] remove_vma+0x139/0x170 [ 39.427458] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.428026] do_vmi_munmap+0x1f1/0x2b0 [ 39.428519] __vm_munmap+0x138/0x3a0 [ 39.428995] __x64_sys_munmap+0x59/0x80 [ 39.429501] do_syscall_64+0x3f/0x90 [ 39.429983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.430639] [ 39.430857] The buggy address belongs to the object at ffff8880169be740 [ 39.430857] which belongs to the cache vm_area_struct of size 168 [ 39.432351] The buggy address is located 88 bytes inside of [ 39.432351] freed 168-byte region [ffff8880169be740, ffff8880169be7e8) [ 39.433774] [ 39.433991] The buggy address belongs to the physical page: [ 39.434677] page:00000000babbb11c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169be [ 39.435790] memcg:ffff88801341c801 [ 39.436228] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.436875] page_type: 0xffffffff() [ 39.437326] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.438248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801341c801 [ 39.439169] page dumped because: kasan: bad access detected [ 39.439825] [ 39.440045] Memory state around the buggy address: [ 39.440626] ffff8880169be680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.441483] ffff8880169be700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.442351] >ffff8880169be780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.443214] ^ [ 39.443717] ffff8880169be800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.444584] ffff8880169be880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.445446] ================================================================== [ 39.446401] Disabling lock debugging due to kernel taint [ 41.751396] BUG: Bad rss-counter state mm:000000004a9e8fbf type:MM_FILEPAGES val:31 [ 41.752704] BUG: Bad rss-counter state mm:000000004a9e8fbf type:MM_ANONPAGES val:22 [ 42.313898] BUG: Bad rss-counter state mm:00000000006e7495 type:MM_FILEPAGES val:33 [ 42.315158] BUG: Bad rss-counter state mm:00000000006e7495 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36802' (ECDSA) to the list of known hosts. 2023/06/20 03:33:37 fuzzer started 2023/06/20 03:33:37 dialing manager at localhost:44161 2023/06/20 03:33:37 checking machine... 2023/06/20 03:33:37 checking revisions... [ 42.976000] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:33:37 testing simple program... [ 43.026168] cgroup: Unknown subsys name 'net' [ 43.076238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:33:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f782941cfd0 CR3=00000000197c4000 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=2037333a33333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613753e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86137542 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=0000000000000005 R15=ffff88806cf09a78 RIP=ffffffff81130b17 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 00007f03a5196900 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=00007ffe4be34000 CR3=000000000c908000 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=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