syzkaller login: [ 31.787675] BUG: Bad rss-counter state mm:00000000d4ed5728 type:MM_FILEPAGES val:33 [ 31.788697] BUG: Bad rss-counter state mm:00000000d4ed5728 type:MM_ANONPAGES val:22 [ 31.965394] ================================================================== [ 31.966479] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.967591] Read of size 8 at addr ffff88800f19fa50 by task sshd/220 [ 31.968617] [ 31.968907] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.969899] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.970960] Call Trace: [ 31.971301] [ 31.971605] dump_stack_lvl+0x91/0xf0 [ 31.972126] print_report+0xcc/0x620 [ 31.972644] ? __virt_addr_valid+0x102/0x340 [ 31.973242] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.973903] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.974559] kasan_report+0xbe/0xf0 [ 31.975066] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.975726] vma_interval_tree_remove+0xc75/0xec0 [ 31.976369] vma_prepare+0xc54/0x11a0 [ 31.976890] __split_vma+0x5af/0x950 [ 31.977391] ? __pfx___split_vma+0x10/0x10 [ 31.977956] ? find_held_lock+0x2c/0x110 [ 31.978515] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.979120] ? lock_is_held_type+0x9f/0x120 [ 31.979721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.980366] ? mtree_range_walk+0x632/0x900 [ 31.980972] ? mas_walk+0x5c7/0x7c0 [ 31.981474] do_vmi_munmap+0x1f1/0x2b0 [ 31.981997] mmap_region+0x1f9/0x2660 [ 31.982519] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.983063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.983823] ? __pfx_lock_acquire+0x10/0x10 [ 31.984385] ? __pfx_mmap_region+0x10/0x10 [ 31.984955] ? security_mmap_addr+0x7d/0xa0 [ 31.985515] ? get_unmapped_area+0x1f5/0x3f0 [ 31.986101] do_mmap+0x854/0xf00 [ 31.986568] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.987094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.987690] ksys_mmap_pgoff+0x3af/0x500 [ 31.988230] do_syscall_64+0x3f/0x90 [ 31.988739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.989445] RIP: 0033:0x7f87460e7d82 [ 31.989930] 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 [ 31.992202] RSP: 002b:00007ffd3f2cb198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.993175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87460e7d82 [ 31.994082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8745521000 [ 31.994994] RBP: 00007f8745521000 R08: 0000000000000009 R09: 0000000000001000 [ 31.995896] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6f5227ec0 [ 31.996839] R13: 00007ffd3f2cb1b0 R14: 00007ffd3f2cb1e0 R15: 00007ffd3f2cb540 [ 31.997783] [ 31.998100] [ 31.998333] Allocated by task 213: [ 31.998799] kasan_save_stack+0x22/0x50 [ 31.999339] kasan_set_track+0x25/0x30 [ 31.999874] __kasan_slab_alloc+0x59/0x70 [ 32.000434] kmem_cache_alloc+0x16b/0x370 [ 32.001005] vm_area_dup+0x20/0x160 [ 32.001489] __split_vma+0x170/0x950 [ 32.001998] split_vma+0xc6/0x110 [ 32.002469] mprotect_fixup+0x8d2/0xb30 [ 32.003008] do_mprotect_pkey+0x87e/0xd40 [ 32.003567] __x64_sys_mprotect+0x78/0xc0 [ 32.004116] do_syscall_64+0x3f/0x90 [ 32.004624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.005314] [ 32.005554] Freed by task 213: [ 32.005990] kasan_save_stack+0x22/0x50 [ 32.006556] kasan_set_track+0x25/0x30 [ 32.007105] kasan_save_free_info+0x2b/0x50 [ 32.007707] __kasan_slab_free+0x10a/0x190 [ 32.008298] kmem_cache_free+0x10d/0x4d0 [ 32.008917] rcu_core+0x8c8/0x2860 [ 32.009417] __do_softirq+0x1b7/0x7d4 [ 32.009939] [ 32.010178] Last potentially related work creation: [ 32.010827] kasan_save_stack+0x22/0x50 [ 32.011384] __kasan_record_aux_stack+0x8e/0xa0 [ 32.012017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.012727] remove_vma+0x139/0x170 [ 32.013248] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.013867] do_vmi_munmap+0x1f1/0x2b0 [ 32.014400] __vm_munmap+0x138/0x3a0 [ 32.014917] __x64_sys_munmap+0x59/0x80 [ 32.015465] do_syscall_64+0x3f/0x90 [ 32.015983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.016689] [ 32.016933] The buggy address belongs to the object at ffff88800f19f9f8 [ 32.016933] which belongs to the cache vm_area_struct of size 168 [ 32.018580] The buggy address is located 88 bytes inside of [ 32.018580] freed 168-byte region [ffff88800f19f9f8, ffff88800f19faa0) [ 32.020146] [ 32.020382] The buggy address belongs to the physical page: [ 32.021141] page:000000000a1ba11d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf19f [ 32.022343] memcg:ffff8880095c2401 [ 32.022816] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.023524] page_type: 0xffffffff() [ 32.024024] raw: 0100000000000200 ffff88800879fc80 ffffea00003a0480 dead000000000006 [ 32.025050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c2401 [ 32.026052] page dumped because: kasan: bad access detected [ 32.026785] [ 32.027022] Memory state around the buggy address: [ 32.027663] ffff88800f19f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.028609] ffff88800f19f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.029571] >ffff88800f19fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.030496] ^ [ 32.031242] ffff88800f19fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.032154] ffff88800f19fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.033079] ================================================================== [ 32.034147] Disabling lock debugging due to kernel taint [ 34.530235] BUG: Bad rss-counter state mm:000000008a914f51 type:MM_FILEPAGES val:33 [ 34.531339] BUG: Bad rss-counter state mm:000000008a914f51 type:MM_ANONPAGES val:22 [ 35.078317] BUG: Bad rss-counter state mm:00000000dff70b51 type:MM_FILEPAGES val:33 [ 35.079417] BUG: Bad rss-counter state mm:00000000dff70b51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38448' (ECDSA) to the list of known hosts. 2023/06/20 02:19:17 fuzzer started 2023/06/20 02:19:17 dialing manager at localhost:44161 2023/06/20 02:19:17 checking machine... 2023/06/20 02:19:17 checking revisions... [ 35.727486] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:19:17 testing simple program... [ 35.783716] cgroup: Unknown subsys name 'net' [ 35.824667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:19:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d0e2a6a RCX=1ffff11001a1c538 RDX=0000000000000004 RSI=ffff888015dc87c4 RDI=ffff88800d0e2a5c RBP=0000000000000000 RSP=ffff888014667d70 R8 =0000000000000001 R9 =ffff88800d0e2a5c R10=ffff88800d0e2a13 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800d0e2a6c R14=ffff88800d0e2a5c R15=ffff88800d0e2980 RIP=ffffffff844d2b6b 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 00007fa8b5bdc900 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=00007fa8b5b9001c CR3=0000000008de8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81787ba6 RBX=0000000000000080 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81787baa RDI=ffffffff85d3bed0 RBP=ffff8880146e7a70 RSP=ffff8880146e7a60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff8880087b6780 R13=ffff888013fad300 R14=ffff8880146e8000 R15=ffffffff8186cb26 RIP=ffffffff81787bd6 RFL=00000282 [--S----] 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 00007f086ceed900 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=00007f086c377990 CR3=000000000d64c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d1a8dd077f1e483700000000000ae988 XMM05=f0b7937e7c976cd500000000001353a0 XMM06=4fda316b135da52b0000000000134190 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000