syzkaller login: [ 30.822636] BUG: Bad rss-counter state mm:00000000795247b7 type:MM_FILEPAGES val:33 [ 30.823928] BUG: Bad rss-counter state mm:00000000795247b7 type:MM_ANONPAGES val:22 [ 30.990157] ================================================================== [ 30.991115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.992111] Read of size 8 at addr ffff88800c4ec140 by task sshd/221 [ 30.993103] [ 30.993345] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.994262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.995352] Call Trace: [ 30.995692] [ 30.996000] dump_stack_lvl+0x91/0xf0 [ 30.996525] print_report+0xcc/0x620 [ 30.997041] ? __virt_addr_valid+0x102/0x340 [ 30.997631] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998290] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998962] kasan_report+0xbe/0xf0 [ 30.999472] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.000151] vma_interval_tree_remove+0xc75/0xec0 [ 31.000816] vma_prepare+0xc54/0x11a0 [ 31.001337] __split_vma+0x5af/0x950 [ 31.001857] ? __pfx___split_vma+0x10/0x10 [ 31.002437] ? find_held_lock+0x2c/0x110 [ 31.003026] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.003644] ? lock_is_held_type+0x9f/0x120 [ 31.004238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.004901] ? mtree_range_walk+0x632/0x900 [ 31.005512] ? mas_walk+0x5c7/0x7c0 [ 31.006042] do_vmi_munmap+0x1f1/0x2b0 [ 31.006588] mmap_region+0x1f9/0x2660 [ 31.007124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.007695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.008478] ? __pfx_lock_acquire+0x10/0x10 [ 31.009061] ? __pfx_mmap_region+0x10/0x10 [ 31.009646] ? security_mmap_addr+0x7d/0xa0 [ 31.010227] ? get_unmapped_area+0x1f5/0x3f0 [ 31.010835] do_mmap+0x854/0xf00 [ 31.011318] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.011862] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.012477] ksys_mmap_pgoff+0x3af/0x500 [ 31.013032] do_syscall_64+0x3f/0x90 [ 31.013561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.014277] RIP: 0033:0x7fbaa53bad82 [ 31.014798] 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 [ 31.017116] RSP: 002b:00007ffd147e7518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.018099] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbaa53bad82 [ 31.019037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbaa47f4000 [ 31.019962] RBP: 00007fbaa47f4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.020875] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582b0f5dec0 [ 31.021796] R13: 00007ffd147e7530 R14: 00007ffd147e7560 R15: 00007ffd147e78c0 [ 31.022727] [ 31.023051] [ 31.023287] Allocated by task 214: [ 31.023760] kasan_save_stack+0x22/0x50 [ 31.024314] kasan_set_track+0x25/0x30 [ 31.024858] __kasan_slab_alloc+0x59/0x70 [ 31.025432] kmem_cache_alloc+0x16b/0x370 [ 31.025998] vm_area_dup+0x20/0x160 [ 31.026498] __split_vma+0x170/0x950 [ 31.027028] split_vma+0xc6/0x110 [ 31.027507] mprotect_fixup+0x8d2/0xb30 [ 31.028057] do_mprotect_pkey+0x87e/0xd40 [ 31.028627] __x64_sys_mprotect+0x78/0xc0 [ 31.029193] do_syscall_64+0x3f/0x90 [ 31.029716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030429] [ 31.030667] Freed by task 214: [ 31.031099] kasan_save_stack+0x22/0x50 [ 31.031661] kasan_set_track+0x25/0x30 [ 31.032206] kasan_save_free_info+0x2b/0x50 [ 31.032793] __kasan_slab_free+0x10a/0x190 [ 31.033372] kmem_cache_free+0x10d/0x4d0 [ 31.033933] rcu_core+0x8c8/0x2860 [ 31.034419] __do_softirq+0x1b7/0x7d4 [ 31.034959] [ 31.035192] Last potentially related work creation: [ 31.035832] kasan_save_stack+0x22/0x50 [ 31.036386] __kasan_record_aux_stack+0x8e/0xa0 [ 31.037010] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.037709] remove_vma+0x139/0x170 [ 31.038204] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.038828] do_vmi_munmap+0x1f1/0x2b0 [ 31.039363] __vm_munmap+0x138/0x3a0 [ 31.039880] __x64_sys_munmap+0x59/0x80 [ 31.040425] do_syscall_64+0x3f/0x90 [ 31.040947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041660] [ 31.041895] Second to last potentially related work creation: [ 31.042650] kasan_save_stack+0x22/0x50 [ 31.043208] __kasan_record_aux_stack+0x8e/0xa0 [ 31.043839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.044540] remove_vma+0x139/0x170 [ 31.045038] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.045653] do_vmi_munmap+0x1f1/0x2b0 [ 31.046188] mmap_region+0x1f9/0x2660 [ 31.046710] do_mmap+0x854/0xf00 [ 31.047196] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.047736] ksys_mmap_pgoff+0x3af/0x500 [ 31.048286] do_syscall_64+0x3f/0x90 [ 31.048804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049506] [ 31.049743] The buggy address belongs to the object at ffff88800c4ec0e8 [ 31.049743] which belongs to the cache vm_area_struct of size 168 [ 31.051340] The buggy address is located 88 bytes inside of [ 31.051340] freed 168-byte region [ffff88800c4ec0e8, ffff88800c4ec190) [ 31.052894] [ 31.053133] The buggy address belongs to the physical page: [ 31.053860] page:0000000019aca1b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4ec [ 31.055028] memcg:ffff88800d665c01 [ 31.055482] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.056222] page_type: 0xffffffff() [ 31.056703] raw: 0100000000000200 ffff8880087a0c80 ffffea0000313180 dead000000000007 [ 31.057684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d665c01 [ 31.058648] page dumped because: kasan: bad access detected [ 31.059377] [ 31.059608] Memory state around the buggy address: [ 31.060222] ffff88800c4ec000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.061142] ffff88800c4ec080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.062085] >ffff88800c4ec100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.063016] ^ [ 31.063711] ffff88800c4ec180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.064653] ffff88800c4ec200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.065592] ================================================================== [ 31.066850] Disabling lock debugging due to kernel taint [ 32.979689] BUG: Bad rss-counter state mm:000000001eabd72a type:MM_FILEPAGES val:33 [ 32.980505] BUG: Bad rss-counter state mm:000000001eabd72a type:MM_ANONPAGES val:22 [ 33.362392] BUG: Bad rss-counter state mm:000000008a0785f4 type:MM_FILEPAGES val:33 [ 33.363757] BUG: Bad rss-counter state mm:000000008a0785f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64865' (ECDSA) to the list of known hosts. 2023/06/21 06:38:54 fuzzer started 2023/06/21 06:38:55 dialing manager at localhost:36067 2023/06/21 06:38:55 checking machine... 2023/06/21 06:38:55 checking revisions... [ 33.994005] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:38:55 testing simple program... [ 34.038723] cgroup: Unknown subsys name 'net' [ 34.090044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:38:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019e17730 RCX=0000000000000001 RDX=ffff888019e17738 RSI=ffff888019e17950 RDI=ffff888019e17738 RBP=ffff888019e17950 RSP=ffff888019e17688 R8 =ffffffff8613f412 R9 =ffff888019e17770 R10=0000000000038001 R11=0000000000021e7d R12=0000000000000008 R13=ffff888019e17778 R14=ffff888019e17958 R15=ffff888019e17730 RIP=ffffffff8113043d RFL=00000202 [-------] 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 00007f1ff71f6700 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=00007f719641a900 CR3=000000000d74c000 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=2034353a38333a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110026d7813 RBX=ffff8880136bc068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880136bc098 RBP=ffff8880133927a8 RSP=ffff88800ee0f8e8 R8 =0000000000000001 R9 =ffffed1001dc1f11 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888015b8eb40 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff818464e2 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 00007fe11c33c900 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=00007fffd8066000 CR3=000000000dfbe000 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