syzkaller login: [ 31.793482] BUG: Bad rss-counter state mm:0000000074cd1a26 type:MM_FILEPAGES val:33 [ 31.795267] BUG: Bad rss-counter state mm:0000000074cd1a26 type:MM_ANONPAGES val:22 [ 31.955378] ================================================================== [ 31.956477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.957717] Read of size 8 at addr ffff8880183e3880 by task sshd/221 [ 31.958629] [ 31.958888] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.959970] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.961166] Call Trace: [ 31.961546] [ 31.961880] dump_stack_lvl+0x91/0xf0 [ 31.962466] print_report+0xcc/0x620 [ 31.963032] ? __virt_addr_valid+0x102/0x340 [ 31.963694] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.964453] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.965218] kasan_report+0xbe/0xf0 [ 31.965813] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.966572] vma_interval_tree_remove+0xc75/0xec0 [ 31.967309] vma_prepare+0xc54/0x11a0 [ 31.967909] __split_vma+0x5af/0x950 [ 31.968485] ? __pfx___split_vma+0x10/0x10 [ 31.969148] ? find_held_lock+0x2c/0x110 [ 31.969788] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.970477] ? lock_is_held_type+0x9f/0x120 [ 31.971137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.971879] ? mtree_range_walk+0x632/0x900 [ 31.972553] ? mas_walk+0x5c7/0x7c0 [ 31.973162] do_vmi_munmap+0x1f1/0x2b0 [ 31.973711] mmap_region+0x1f9/0x2660 [ 31.974193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.974716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.975438] ? __pfx_lock_acquire+0x10/0x10 [ 31.975968] ? __pfx_mmap_region+0x10/0x10 [ 31.976492] ? security_mmap_addr+0x7d/0xa0 [ 31.977023] ? get_unmapped_area+0x1f5/0x3f0 [ 31.977588] do_mmap+0x854/0xf00 [ 31.978034] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.978526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.979088] ksys_mmap_pgoff+0x3af/0x500 [ 31.979594] do_syscall_64+0x3f/0x90 [ 31.980074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.980732] RIP: 0033:0x7fa12dac0d82 [ 31.981199] 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 [ 31.983332] RSP: 002b:00007ffc5077eff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.984239] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa12dac0d82 [ 31.985095] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa12cefa000 [ 31.985959] RBP: 00007fa12cefa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.986809] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564af7789ec0 [ 31.987667] R13: 00007ffc5077f010 R14: 00007ffc5077f040 R15: 00007ffc5077f3a0 [ 31.988526] [ 31.988817] [ 31.989032] Allocated by task 214: [ 31.989480] kasan_save_stack+0x22/0x50 [ 31.989982] kasan_set_track+0x25/0x30 [ 31.990479] __kasan_slab_alloc+0x59/0x70 [ 31.991003] kmem_cache_alloc+0x16b/0x370 [ 31.991515] vm_area_dup+0x20/0x160 [ 31.991971] __split_vma+0x170/0x950 [ 31.992442] split_vma+0xc6/0x110 [ 31.992884] mprotect_fixup+0x8d2/0xb30 [ 31.993412] do_mprotect_pkey+0x87e/0xd40 [ 31.993934] __x64_sys_mprotect+0x78/0xc0 [ 31.994462] do_syscall_64+0x3f/0x90 [ 31.994942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.995583] [ 31.995805] Freed by task 214: [ 31.996202] kasan_save_stack+0x22/0x50 [ 31.996705] kasan_set_track+0x25/0x30 [ 31.997201] kasan_save_free_info+0x2b/0x50 [ 31.997735] __kasan_slab_free+0x10a/0x190 [ 31.998264] kmem_cache_free+0x10d/0x4d0 [ 31.998881] rcu_core+0x8c8/0x2860 [ 31.999332] __do_softirq+0x1b7/0x7d4 [ 31.999830] [ 32.000051] Last potentially related work creation: [ 32.000633] kasan_save_stack+0x22/0x50 [ 32.001152] __kasan_record_aux_stack+0x8e/0xa0 [ 32.001723] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.002402] remove_vma+0x139/0x170 [ 32.002854] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.003419] do_vmi_munmap+0x1f1/0x2b0 [ 32.003911] __vm_munmap+0x138/0x3a0 [ 32.004380] __x64_sys_munmap+0x59/0x80 [ 32.004883] do_syscall_64+0x3f/0x90 [ 32.005372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.006036] [ 32.006256] The buggy address belongs to the object at ffff8880183e3828 [ 32.006256] which belongs to the cache vm_area_struct of size 168 [ 32.007753] The buggy address is located 88 bytes inside of [ 32.007753] freed 168-byte region [ffff8880183e3828, ffff8880183e38d0) [ 32.009184] [ 32.009410] The buggy address belongs to the physical page: [ 32.010076] page:00000000b1d4e289 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183e3 [ 32.011163] memcg:ffff88800cbcbb01 [ 32.011590] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.012224] page_type: 0xffffffff() [ 32.012679] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.013622] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbcbb01 [ 32.014550] page dumped because: kasan: bad access detected [ 32.015206] [ 32.015422] Memory state around the buggy address: [ 32.016058] ffff8880183e3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.016901] ffff8880183e3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.017753] >ffff8880183e3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.018604] ^ [ 32.019013] ffff8880183e3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.019869] ffff8880183e3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.020709] ================================================================== [ 32.021691] Disabling lock debugging due to kernel taint [ 34.740464] BUG: Bad rss-counter state mm:0000000079e7e4cc type:MM_FILEPAGES val:33 [ 34.741906] BUG: Bad rss-counter state mm:0000000079e7e4cc type:MM_ANONPAGES val:22 [ 35.190769] BUG: Bad rss-counter state mm:0000000063f4dcfb type:MM_FILEPAGES val:33 [ 35.191754] BUG: Bad rss-counter state mm:0000000063f4dcfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14623' (ECDSA) to the list of known hosts. 2023/06/20 16:43:41 fuzzer started 2023/06/20 16:43:41 dialing manager at localhost:36067 2023/06/20 16:43:41 checking machine... 2023/06/20 16:43:41 checking revisions... [ 35.909973] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:43:41 testing simple program... [ 35.962751] cgroup: Unknown subsys name 'net' [ 36.009254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:43:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce2c240 RCX=0000000000000000 RDX=1ffffffff0a81e40 RSI=ffffffff813fc14b RDI=0000000000000001 RBP=000000082a4693e3 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=000000180bc76b58 R12=00000000fffbf412 R13=00000000fffbf411 R14=ffffffff8540f200 R15=ffff88806ce2c248 RIP=ffffffff813fc197 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0b0ff9d900 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=00007f0b10551ae8 CR3=000000000d648000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007ffa160ce220 CR3=000000000d9cc000 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=2031343a33343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000