syzkaller login: [ 30.798943] BUG: Bad rss-counter state mm:000000008a52331a type:MM_FILEPAGES val:33 [ 30.800360] BUG: Bad rss-counter state mm:000000008a52331a type:MM_ANONPAGES val:22 [ 30.955082] ================================================================== [ 30.956116] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.957119] Read of size 8 at addr ffff888016472310 by task sshd/220 [ 30.958085] [ 30.958324] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.959277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.960403] Call Trace: [ 30.960762] [ 30.961081] dump_stack_lvl+0x91/0xf0 [ 30.961652] print_report+0xcc/0x620 [ 30.962178] ? __virt_addr_valid+0x102/0x340 [ 30.962793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.963500] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964177] kasan_report+0xbe/0xf0 [ 30.964705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965413] vma_interval_tree_remove+0xc75/0xec0 [ 30.966109] vma_prepare+0xc54/0x11a0 [ 30.966657] __split_vma+0x5af/0x950 [ 30.967207] ? __pfx___split_vma+0x10/0x10 [ 30.967844] ? find_held_lock+0x2c/0x110 [ 30.968448] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.969095] ? lock_is_held_type+0x9f/0x120 [ 30.969735] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.970427] ? mtree_range_walk+0x632/0x900 [ 30.971060] ? mas_walk+0x5c7/0x7c0 [ 30.971638] do_vmi_munmap+0x1f1/0x2b0 [ 30.972212] mmap_region+0x1f9/0x2660 [ 30.972771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.973368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.974190] ? __pfx_lock_acquire+0x10/0x10 [ 30.974815] ? __pfx_mmap_region+0x10/0x10 [ 30.975447] ? security_mmap_addr+0x7d/0xa0 [ 30.976075] ? get_unmapped_area+0x1f5/0x3f0 [ 30.976714] do_mmap+0x854/0xf00 [ 30.977212] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.977815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.978466] ksys_mmap_pgoff+0x3af/0x500 [ 30.979058] do_syscall_64+0x3f/0x90 [ 30.979634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.980383] RIP: 0033:0x7f350d42bd82 [ 30.980907] 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 [ 30.983415] RSP: 002b:00007ffdfab8df78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.984454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f350d42bd82 [ 30.985451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f350c865000 [ 30.986417] RBP: 00007f350c865000 R08: 0000000000000009 R09: 0000000000001000 [ 30.987433] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9f4f62ec0 [ 30.988421] R13: 00007ffdfab8df90 R14: 00007ffdfab8dfc0 R15: 00007ffdfab8e320 [ 30.989420] [ 30.989801] [ 30.990043] Allocated by task 213: [ 30.990542] kasan_save_stack+0x22/0x50 [ 30.991113] kasan_set_track+0x25/0x30 [ 30.991686] __kasan_slab_alloc+0x59/0x70 [ 30.992260] kmem_cache_alloc+0x16b/0x370 [ 30.992833] vm_area_dup+0x20/0x160 [ 30.993344] __split_vma+0x170/0x950 [ 30.993878] split_vma+0xc6/0x110 [ 30.994371] mprotect_fixup+0x8d2/0xb30 [ 30.994957] do_mprotect_pkey+0x87e/0xd40 [ 30.995576] __x64_sys_mprotect+0x78/0xc0 [ 30.996166] do_syscall_64+0x3f/0x90 [ 30.996729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.997476] [ 30.997767] Freed by task 213: [ 30.998219] kasan_save_stack+0x22/0x50 [ 30.998794] kasan_set_track+0x25/0x30 [ 30.999397] kasan_save_free_info+0x2b/0x50 [ 31.000017] __kasan_slab_free+0x10a/0x190 [ 31.000631] kmem_cache_free+0x10d/0x4d0 [ 31.001216] rcu_core+0x8c8/0x2860 [ 31.001756] __do_softirq+0x1b7/0x7d4 [ 31.002300] [ 31.002552] Last potentially related work creation: [ 31.003229] kasan_save_stack+0x22/0x50 [ 31.003834] __kasan_record_aux_stack+0x8e/0xa0 [ 31.004493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.005234] remove_vma+0x139/0x170 [ 31.005778] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.006437] do_vmi_munmap+0x1f1/0x2b0 [ 31.007019] __vm_munmap+0x138/0x3a0 [ 31.007589] __x64_sys_munmap+0x59/0x80 [ 31.008166] do_syscall_64+0x3f/0x90 [ 31.008711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.009458] [ 31.009739] The buggy address belongs to the object at ffff8880164722b8 [ 31.009739] which belongs to the cache vm_area_struct of size 168 [ 31.011487] The buggy address is located 88 bytes inside of [ 31.011487] freed 168-byte region [ffff8880164722b8, ffff888016472360) [ 31.013120] [ 31.013372] The buggy address belongs to the physical page: [ 31.014142] page:00000000b517d0b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16472 [ 31.015460] memcg:ffff88801a11fc01 [ 31.015963] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.016714] page_type: 0xffffffff() [ 31.017235] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395640 000000000000000a [ 31.018328] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a11fc01 [ 31.019409] page dumped because: kasan: bad access detected [ 31.020192] [ 31.020435] Memory state around the buggy address: [ 31.021112] ffff888016472200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.022120] ffff888016472280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.023109] >ffff888016472300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.024128] ^ [ 31.024682] ffff888016472380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.025702] ffff888016472400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.026712] ================================================================== [ 31.028119] Disabling lock debugging due to kernel taint [ 33.306756] BUG: Bad rss-counter state mm:000000008d420c64 type:MM_FILEPAGES val:33 [ 33.307792] BUG: Bad rss-counter state mm:000000008d420c64 type:MM_ANONPAGES val:22 [ 33.793817] BUG: Bad rss-counter state mm:00000000c1e88443 type:MM_FILEPAGES val:33 [ 33.794965] BUG: Bad rss-counter state mm:00000000c1e88443 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22505' (ECDSA) to the list of known hosts. 2023/06/20 21:24:25 fuzzer started 2023/06/20 21:24:26 dialing manager at localhost:36067 2023/06/20 21:24:26 checking machine... 2023/06/20 21:24:26 checking revisions... [ 34.408990] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:24:26 testing simple program... [ 34.461085] cgroup: Unknown subsys name 'net' [ 34.508412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:24:25 Registers: info registers vcpu 0 RAX=1ffffd40000da328 RBX=0000000000000001 RCX=ffffffff8162a254 RDX=fffff940000da329 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffea00006d1940 RSP=ffff888016e9f8f0 R8 =0000000000000000 R9 =fffff940000da328 R10=ffffea00006d1947 R11=0000000000000000 R12=0000000000000001 R13=dffffc0000000000 R14=0000000000000000 R15=ffff888016e9f938 RIP=ffffffff814c03a4 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 00007f82b87e1900 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=00007fff28271000 CR3=000000000e882000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000002 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff88806cf09af0 RSP=ffff88806cf099b8 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc18 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 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=00007fb64fc9bf80 CR3=000000000d876000 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=2a74f09551d43fb0064716822941beeb XMM02=000000000011b850eff9b2d0a8fce9cb XMM03=000000000011b9202c67c8bc2e329bc3 XMM04=70534fb31d6b1cd400000000000ae988 XMM05=19e9129bd510f2350000000000132500 XMM06=ed73f683084309460000000000131368 XMM07=e042d86d42eb936e0000000000122920 XMM08=5a5ee60a1bc4ac10000000000011b920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000