syzkaller login: [ 35.802180] BUG: Bad rss-counter state mm:00000000e2ff9c79 type:MM_FILEPAGES val:33 [ 35.802887] BUG: Bad rss-counter state mm:00000000e2ff9c79 type:MM_ANONPAGES val:22 [ 35.974311] ================================================================== [ 35.975752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.977340] Read of size 8 at addr ffff88801624edf0 by task sshd/220 [ 35.978371] [ 35.978630] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.979676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.980875] Call Trace: [ 35.981259] [ 35.981591] dump_stack_lvl+0x91/0xf0 [ 35.982166] print_report+0xcc/0x620 [ 35.982740] ? __virt_addr_valid+0x102/0x340 [ 35.983404] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.984134] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.984867] kasan_report+0xbe/0xf0 [ 35.985420] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.986155] vma_interval_tree_remove+0xc75/0xec0 [ 35.986874] vma_prepare+0xc54/0x11a0 [ 35.987444] __split_vma+0x5af/0x950 [ 35.988006] ? __pfx___split_vma+0x10/0x10 [ 35.988656] ? find_held_lock+0x2c/0x110 [ 35.989273] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.989946] ? lock_is_held_type+0x9f/0x120 [ 35.990592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.991314] ? mtree_range_walk+0x632/0x900 [ 35.991885] ? mas_walk+0x5c7/0x7c0 [ 35.992333] do_vmi_munmap+0x1f1/0x2b0 [ 35.992810] mmap_region+0x1f9/0x2660 [ 35.993261] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.993741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.994406] ? __pfx_lock_acquire+0x10/0x10 [ 35.994907] ? __pfx_mmap_region+0x10/0x10 [ 35.995403] ? security_mmap_addr+0x7d/0xa0 [ 35.995898] ? get_unmapped_area+0x1f5/0x3f0 [ 35.996409] do_mmap+0x854/0xf00 [ 35.996827] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.997292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.997817] ksys_mmap_pgoff+0x3af/0x500 [ 35.998298] do_syscall_64+0x3f/0x90 [ 35.998746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.999352] RIP: 0033:0x7f214019bd82 [ 35.999778] 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 [ 36.001772] RSP: 002b:00007ffd00a63fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.002649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f214019bd82 [ 36.003472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f213f5d5000 [ 36.004306] RBP: 00007f213f5d5000 R08: 0000000000000009 R09: 0000000000001000 [ 36.005145] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561acd1c5980 [ 36.005963] R13: 00007ffd00a64000 R14: 00007ffd00a64030 R15: 00007ffd00a64390 [ 36.006795] [ 36.007080] [ 36.007290] Allocated by task 213: [ 36.007698] kasan_save_stack+0x22/0x50 [ 36.008193] kasan_set_track+0x25/0x30 [ 36.008687] __kasan_slab_alloc+0x59/0x70 [ 36.009203] kmem_cache_alloc+0x16b/0x370 [ 36.009694] vm_area_dup+0x20/0x160 [ 36.010128] __split_vma+0x170/0x950 [ 36.010582] split_vma+0xc6/0x110 [ 36.011001] mprotect_fixup+0x8d2/0xb30 [ 36.011490] do_mprotect_pkey+0x87e/0xd40 [ 36.011989] __x64_sys_mprotect+0x78/0xc0 [ 36.012497] do_syscall_64+0x3f/0x90 [ 36.012970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.013588] [ 36.013796] Freed by task 13: [ 36.014170] kasan_save_stack+0x22/0x50 [ 36.014656] kasan_set_track+0x25/0x30 [ 36.015132] kasan_save_free_info+0x2b/0x50 [ 36.015644] __kasan_slab_free+0x10a/0x190 [ 36.016156] kmem_cache_free+0x10d/0x4d0 [ 36.016661] rcu_core+0x8c8/0x2860 [ 36.017093] __do_softirq+0x1b7/0x7d4 [ 36.017559] [ 36.017763] Last potentially related work creation: [ 36.018361] kasan_save_stack+0x22/0x50 [ 36.018842] __kasan_record_aux_stack+0x8e/0xa0 [ 36.019379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.019982] remove_vma+0x139/0x170 [ 36.020402] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.020934] do_vmi_munmap+0x1f1/0x2b0 [ 36.021387] __vm_munmap+0x138/0x3a0 [ 36.021829] __x64_sys_munmap+0x59/0x80 [ 36.022300] do_syscall_64+0x3f/0x90 [ 36.022752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.023356] [ 36.023564] The buggy address belongs to the object at ffff88801624ed98 [ 36.023564] which belongs to the cache vm_area_struct of size 168 [ 36.024958] The buggy address is located 88 bytes inside of [ 36.024958] freed 168-byte region [ffff88801624ed98, ffff88801624ee40) [ 36.026274] [ 36.026480] The buggy address belongs to the physical page: [ 36.027105] page:000000009119ba1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1624e [ 36.028190] memcg:ffff88800ea9e801 [ 36.028672] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.029388] page_type: 0xffffffff() [ 36.029888] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.030908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea9e801 [ 36.031915] page dumped because: kasan: bad access detected [ 36.032664] [ 36.032902] Memory state around the buggy address: [ 36.033547] ffff88801624ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.034500] ffff88801624ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.035450] >ffff88801624ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.036393] ^ [ 36.037328] ffff88801624ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.038328] ffff88801624ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.039326] ================================================================== [ 36.040403] Disabling lock debugging due to kernel taint [ 38.283391] BUG: Bad rss-counter state mm:000000000aa0131e type:MM_FILEPAGES val:33 [ 38.284323] BUG: Bad rss-counter state mm:000000000aa0131e type:MM_ANONPAGES val:22 [ 38.771654] BUG: Bad rss-counter state mm:00000000541ae1f2 type:MM_FILEPAGES val:33 [ 38.772887] BUG: Bad rss-counter state mm:00000000541ae1f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61898' (ECDSA) to the list of known hosts. 2023/06/19 15:37:02 fuzzer started 2023/06/19 15:37:03 dialing manager at localhost:44161 2023/06/19 15:37:03 checking machine... 2023/06/19 15:37:03 checking revisions... [ 39.539860] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:37:03 testing simple program... [ 39.596584] cgroup: Unknown subsys name 'net' [ 39.637108] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:36:58 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=00007f957d8a1ec0 CR3=000000000cb0c000 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=2032303a37333a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a37333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880184a4b18 RCX=1ffff11001c04ad2 RDX=1ffff11003094963 RSI=ffffffff87b86f80 RDI=ffff88800e3561a8 RBP=ffff88800e356198 RSP=ffff88801ce27c18 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e38fea8 R13=ffff88800e38fea9 R14=ffff8880184a4b20 R15=ffff8880184a4b18 RIP=ffffffff844cddde 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 00007f5f7845d900 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=00007f5f78a150b0 CR3=000000001cc9c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000