syzkaller login: [ 31.818798] BUG: Bad rss-counter state mm:000000001e7de105 type:MM_FILEPAGES val:33 [ 31.820294] BUG: Bad rss-counter state mm:000000001e7de105 type:MM_ANONPAGES val:22 [ 31.973391] ================================================================== [ 31.974392] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.975328] Read of size 8 at addr ffff88800e4b5228 by task sshd/220 [ 31.976201] [ 31.976418] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.977289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.978263] Call Trace: [ 31.978580] [ 31.978863] dump_stack_lvl+0x91/0xf0 [ 31.979346] print_report+0xcc/0x620 [ 31.979826] ? __virt_addr_valid+0x102/0x340 [ 31.980378] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.980988] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.981621] kasan_report+0xbe/0xf0 [ 31.982095] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.982711] vma_interval_tree_remove+0xc75/0xec0 [ 31.983309] vma_prepare+0xc54/0x11a0 [ 31.983785] __split_vma+0x5af/0x950 [ 31.984255] ? __pfx___split_vma+0x10/0x10 [ 31.984779] ? find_held_lock+0x2c/0x110 [ 31.985304] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.985866] ? lock_is_held_type+0x9f/0x120 [ 31.986400] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.987003] ? mtree_range_walk+0x632/0x900 [ 31.987551] ? mas_walk+0x5c7/0x7c0 [ 31.988026] do_vmi_munmap+0x1f1/0x2b0 [ 31.988520] mmap_region+0x1f9/0x2660 [ 31.989007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.989520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.990225] ? __pfx_lock_acquire+0x10/0x10 [ 31.990755] ? __pfx_mmap_region+0x10/0x10 [ 31.991278] ? security_mmap_addr+0x7d/0xa0 [ 31.991804] ? get_unmapped_area+0x1f5/0x3f0 [ 31.992346] do_mmap+0x854/0xf00 [ 31.992785] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.993288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.993871] ksys_mmap_pgoff+0x3af/0x500 [ 31.994397] do_syscall_64+0x3f/0x90 [ 31.994875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.995519] RIP: 0033:0x7f1714e68d82 [ 31.995977] 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 [ 31.998150] RSP: 002b:00007ffeac94d408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.999071] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1714e68d82 [ 31.999951] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17142a2000 [ 32.000809] RBP: 00007f17142a2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.001694] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad4653dec0 [ 32.002557] R13: 00007ffeac94d420 R14: 00007ffeac94d450 R15: 00007ffeac94d7b0 [ 32.003430] [ 32.003726] [ 32.003941] Allocated by task 213: [ 32.004370] kasan_save_stack+0x22/0x50 [ 32.004874] kasan_set_track+0x25/0x30 [ 32.005389] __kasan_slab_alloc+0x59/0x70 [ 32.005919] kmem_cache_alloc+0x16b/0x370 [ 32.006440] vm_area_dup+0x20/0x160 [ 32.006901] __split_vma+0x170/0x950 [ 32.007368] split_vma+0xc6/0x110 [ 32.007810] mprotect_fixup+0x8d2/0xb30 [ 32.008311] do_mprotect_pkey+0x87e/0xd40 [ 32.008828] __x64_sys_mprotect+0x78/0xc0 [ 32.009357] do_syscall_64+0x3f/0x90 [ 32.009831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.010487] [ 32.010702] Freed by task 213: [ 32.011094] kasan_save_stack+0x22/0x50 [ 32.011594] kasan_set_track+0x25/0x30 [ 32.012089] kasan_save_free_info+0x2b/0x50 [ 32.012620] __kasan_slab_free+0x10a/0x190 [ 32.013182] kmem_cache_free+0x10d/0x4d0 [ 32.013687] rcu_core+0x8c8/0x2860 [ 32.014137] __do_softirq+0x1b7/0x7d4 [ 32.014614] [ 32.014829] Last potentially related work creation: [ 32.015410] kasan_save_stack+0x22/0x50 [ 32.015915] __kasan_record_aux_stack+0x8e/0xa0 [ 32.016489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.017136] remove_vma+0x139/0x170 [ 32.017593] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.018149] do_vmi_munmap+0x1f1/0x2b0 [ 32.018642] __vm_munmap+0x138/0x3a0 [ 32.019117] __x64_sys_munmap+0x59/0x80 [ 32.019624] do_syscall_64+0x3f/0x90 [ 32.020094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.020747] [ 32.020961] The buggy address belongs to the object at ffff88800e4b51d0 [ 32.020961] which belongs to the cache vm_area_struct of size 168 [ 32.022468] The buggy address is located 88 bytes inside of [ 32.022468] freed 168-byte region [ffff88800e4b51d0, ffff88800e4b5278) [ 32.023881] [ 32.024098] The buggy address belongs to the physical page: [ 32.024788] page:000000008cabf54b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4b5 [ 32.025965] memcg:ffff88800ef6cf01 [ 32.026418] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.027099] page_type: 0xffffffff() [ 32.027570] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.028541] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef6cf01 [ 32.029513] page dumped because: kasan: bad access detected [ 32.030209] [ 32.030434] Memory state around the buggy address: [ 32.031054] ffff88800e4b5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.031960] ffff88800e4b5180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.032880] >ffff88800e4b5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.033791] ^ [ 32.034376] ffff88800e4b5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.035284] ffff88800e4b5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.036189] ================================================================== [ 32.037212] Disabling lock debugging due to kernel taint [ 33.919853] BUG: Bad rss-counter state mm:0000000077676bba type:MM_FILEPAGES val:33 [ 33.921042] BUG: Bad rss-counter state mm:0000000077676bba type:MM_ANONPAGES val:22 [ 34.315051] BUG: Bad rss-counter state mm:0000000004f85aec type:MM_FILEPAGES val:33 [ 34.316165] BUG: Bad rss-counter state mm:0000000004f85aec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30063' (ECDSA) to the list of known hosts. 2023/06/19 20:14:54 fuzzer started 2023/06/19 20:14:54 dialing manager at localhost:44161 2023/06/19 20:14:54 checking machine... 2023/06/19 20:14:54 checking revisions... [ 35.014016] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:14:54 testing simple program... [ 35.055373] cgroup: Unknown subsys name 'net' [ 35.100738] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:14:53 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=00007fc3805577e0 CR3=000000000d984000 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=2033353a34313a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a34313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019ff0000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff888019fef998 RDI=ffff88806cf09aa8 RBP=ffff888019fef998 RSP=ffff88806cf099f0 R8 =ffffffff863b6884 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008b61a R12=0000000000000008 R13=ffff888019fe8000 R14=ffff888019fef9a0 R15=ffff88806cf09a98 RIP=ffffffff81130472 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 00007f9418ed2900 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=00007ffece263000 CR3=00000000101fa000 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=563412feff00545000000000000080fe 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