syzkaller login: [ 60.842896] BUG: Bad rss-counter state mm:000000009c3f3f0a type:MM_FILEPAGES val:33 [ 60.844388] BUG: Bad rss-counter state mm:000000009c3f3f0a type:MM_ANONPAGES val:22 [ 60.987822] ================================================================== [ 60.988911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.990029] Read of size 8 at addr ffff88800def96b0 by task sshd/221 [ 60.991055] [ 60.991284] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.992174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.993178] Call Trace: [ 60.993501] [ 60.993795] dump_stack_lvl+0x91/0xf0 [ 60.994288] print_report+0xcc/0x620 [ 60.994786] ? __virt_addr_valid+0x102/0x340 [ 60.995368] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.995997] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.996622] kasan_report+0xbe/0xf0 [ 60.997115] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.997749] vma_interval_tree_remove+0xc75/0xec0 [ 60.998358] vma_prepare+0xc54/0x11a0 [ 60.998844] __split_vma+0x5af/0x950 [ 60.999347] ? __pfx___split_vma+0x10/0x10 [ 60.999886] ? find_held_lock+0x2c/0x110 [ 61.000415] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.001003] ? lock_is_held_type+0x9f/0x120 [ 61.001550] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.002160] ? mtree_range_walk+0x632/0x900 [ 61.002728] ? mas_walk+0x5c7/0x7c0 [ 61.003235] do_vmi_munmap+0x1f1/0x2b0 [ 61.003741] mmap_region+0x1f9/0x2660 [ 61.004226] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.004743] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.005467] ? __pfx_lock_acquire+0x10/0x10 [ 61.006008] ? __pfx_mmap_region+0x10/0x10 [ 61.006543] ? security_mmap_addr+0x7d/0xa0 [ 61.007081] ? get_unmapped_area+0x1f5/0x3f0 [ 61.007670] do_mmap+0x854/0xf00 [ 61.008115] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.008616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.009192] ksys_mmap_pgoff+0x3af/0x500 [ 61.009711] do_syscall_64+0x3f/0x90 [ 61.010211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.010864] RIP: 0033:0x7f7fa67c1d82 [ 61.011339] 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 [ 61.013466] RSP: 002b:00007ffcb480b8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.014389] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fa67c1d82 [ 61.015253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fa5bfb000 [ 61.016107] RBP: 00007f7fa5bfb000 R08: 0000000000000009 R09: 0000000000001000 [ 61.016957] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654e1e66ec0 [ 61.017815] R13: 00007ffcb480b8d0 R14: 00007ffcb480b900 R15: 00007ffcb480bc60 [ 61.018676] [ 61.018972] [ 61.019189] Allocated by task 214: [ 61.019640] kasan_save_stack+0x22/0x50 [ 61.020145] kasan_set_track+0x25/0x30 [ 61.020640] __kasan_slab_alloc+0x59/0x70 [ 61.021176] kmem_cache_alloc+0x16b/0x370 [ 61.021697] vm_area_dup+0x20/0x160 [ 61.022160] __split_vma+0x170/0x950 [ 61.022635] split_vma+0xc6/0x110 [ 61.023087] mprotect_fixup+0x8d2/0xb30 [ 61.023617] do_mprotect_pkey+0x87e/0xd40 [ 61.024144] __x64_sys_mprotect+0x78/0xc0 [ 61.024667] do_syscall_64+0x3f/0x90 [ 61.025146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.025796] [ 61.026020] Freed by task 214: [ 61.026420] kasan_save_stack+0x22/0x50 [ 61.026932] kasan_set_track+0x25/0x30 [ 61.027444] kasan_save_free_info+0x2b/0x50 [ 61.027985] __kasan_slab_free+0x10a/0x190 [ 61.028520] kmem_cache_free+0x10d/0x4d0 [ 61.029039] rcu_core+0x8c8/0x2860 [ 61.029489] __do_softirq+0x1b7/0x7d4 [ 61.029971] [ 61.030192] Last potentially related work creation: [ 61.030791] kasan_save_stack+0x22/0x50 [ 61.031323] __kasan_record_aux_stack+0x8e/0xa0 [ 61.031910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.032568] remove_vma+0x139/0x170 [ 61.033022] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.033591] do_vmi_munmap+0x1f1/0x2b0 [ 61.034084] __vm_munmap+0x138/0x3a0 [ 61.034562] __x64_sys_munmap+0x59/0x80 [ 61.035066] do_syscall_64+0x3f/0x90 [ 61.035560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.036208] [ 61.036422] The buggy address belongs to the object at ffff88800def9658 [ 61.036422] which belongs to the cache vm_area_struct of size 168 [ 61.037917] The buggy address is located 88 bytes inside of [ 61.037917] freed 168-byte region [ffff88800def9658, ffff88800def9700) [ 61.039376] [ 61.039594] The buggy address belongs to the physical page: [ 61.040264] page:000000000c7fa4ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef9 [ 61.041354] memcg:ffff88800e0d3601 [ 61.041786] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.042441] page_type: 0xffffffff() [ 61.042898] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.043840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0d3601 [ 61.044749] page dumped because: kasan: bad access detected [ 61.045433] [ 61.045667] Memory state around the buggy address: [ 61.046270] ffff88800def9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.047146] ffff88800def9600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.048041] >ffff88800def9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.048926] ^ [ 61.049518] ffff88800def9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.050387] ffff88800def9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.051280] ================================================================== [ 61.052437] Disabling lock debugging due to kernel taint [ 63.729638] BUG: Bad rss-counter state mm:000000005ec1807e type:MM_FILEPAGES val:33 [ 63.731110] BUG: Bad rss-counter state mm:000000005ec1807e type:MM_ANONPAGES val:22 [ 64.235819] BUG: Bad rss-counter state mm:000000000627030e type:MM_FILEPAGES val:33 [ 64.236833] BUG: Bad rss-counter state mm:000000000627030e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36004' (ECDSA) to the list of known hosts. 2023/06/20 13:33:27 fuzzer started 2023/06/20 13:33:27 dialing manager at localhost:36067 2023/06/20 13:33:27 checking machine... 2023/06/20 13:33:27 checking revisions... [ 64.822121] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:33:27 testing simple program... [ 64.881137] cgroup: Unknown subsys name 'net' [ 64.982105] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:33:27 Registers: info registers vcpu 0 RAX=ffffffff86138eb5 RBX=0000000000000002 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138eb4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130abf RFL=00000246 [---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 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=00007f346bc1ab20 CR3=000000000fdee000 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=2036323a33333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a33333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888015d8f910 RCX=0000000000000001 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888015d8f8d8 RBP=ffff88800947b680 RSP=ffff888015d8f820 R8 =0000000000000006 R9 =0000000000000000 R10=ffff888015d8f878 R11=ffffffff81806f71 R12=0000000000000000 R13=ffff888015d8f8a0 R14=ffff88800947b680 R15=ffff888015d8f878 RIP=ffffffff84513442 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 00007f7b23c5b900 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=00007ffd407eb000 CR3=00000000146c2000 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