syzkaller login: [ 30.946514] BUG: Bad rss-counter state mm:00000000e61a39db type:MM_FILEPAGES val:33 [ 30.947783] BUG: Bad rss-counter state mm:00000000e61a39db type:MM_ANONPAGES val:22 [ 30.987103] ================================================================== [ 30.988133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.989172] Read of size 8 at addr ffff88800ca63798 by task sshd/220 [ 30.989965] [ 30.990187] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.991074] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.992097] Call Trace: [ 30.992432] [ 30.992722] dump_stack_lvl+0x91/0xf0 [ 30.993229] print_report+0xcc/0x620 [ 30.993730] ? __virt_addr_valid+0x102/0x340 [ 30.994298] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994925] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.995588] kasan_report+0xbe/0xf0 [ 30.996077] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.996708] vma_interval_tree_remove+0xc75/0xec0 [ 30.997338] vma_prepare+0xc54/0x11a0 [ 30.997835] __split_vma+0x5af/0x950 [ 30.998322] ? __pfx___split_vma+0x10/0x10 [ 30.998862] ? find_held_lock+0x2c/0x110 [ 30.999409] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.999995] ? lock_is_held_type+0x9f/0x120 [ 31.000557] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.001182] ? mtree_range_walk+0x632/0x900 [ 31.001755] ? mas_walk+0x5c7/0x7c0 [ 31.002246] do_vmi_munmap+0x1f1/0x2b0 [ 31.002756] mmap_region+0x1f9/0x2660 [ 31.003250] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.003804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.004562] ? __pfx_lock_acquire+0x10/0x10 [ 31.005107] ? __pfx_mmap_region+0x10/0x10 [ 31.005656] ? security_mmap_addr+0x7d/0xa0 [ 31.006207] ? get_unmapped_area+0x1f5/0x3f0 [ 31.006777] do_mmap+0x854/0xf00 [ 31.007230] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.007746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.008333] ksys_mmap_pgoff+0x3af/0x500 [ 31.008854] do_syscall_64+0x3f/0x90 [ 31.009347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.010018] RIP: 0033:0x7f3c3afdad82 [ 31.010484] 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 [ 31.012722] RSP: 002b:00007ffdb7511268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.013666] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c3afdad82 [ 31.014538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c3a414000 [ 31.015432] RBP: 00007f3c3a414000 R08: 0000000000000009 R09: 0000000000001000 [ 31.016295] R10: 0000000000000812 R11: 0000000000000206 R12: 000055941ccc8f70 [ 31.017281] R13: 00007ffdb7511280 R14: 00007ffdb75112b0 R15: 00007ffdb7511610 [ 31.018180] [ 31.018462] [ 31.018667] Allocated by task 213: [ 31.019074] kasan_save_stack+0x22/0x50 [ 31.019562] kasan_set_track+0x25/0x30 [ 31.020029] __kasan_slab_alloc+0x59/0x70 [ 31.020523] kmem_cache_alloc+0x16b/0x370 [ 31.021010] vm_area_dup+0x20/0x160 [ 31.021441] __split_vma+0x170/0x950 [ 31.021885] split_vma+0xc6/0x110 [ 31.022309] mprotect_fixup+0x8d2/0xb30 [ 31.022789] do_mprotect_pkey+0x87e/0xd40 [ 31.023301] __x64_sys_mprotect+0x78/0xc0 [ 31.023799] do_syscall_64+0x3f/0x90 [ 31.024250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.024857] [ 31.025063] Freed by task 213: [ 31.025431] kasan_save_stack+0x22/0x50 [ 31.025905] kasan_set_track+0x25/0x30 [ 31.026374] kasan_save_free_info+0x2b/0x50 [ 31.026872] __kasan_slab_free+0x10a/0x190 [ 31.027411] kmem_cache_free+0x10d/0x4d0 [ 31.027922] rcu_core+0x8c8/0x2860 [ 31.028378] __do_softirq+0x1b7/0x7d4 [ 31.028846] [ 31.029057] Last potentially related work creation: [ 31.029636] kasan_save_stack+0x22/0x50 [ 31.030147] __kasan_record_aux_stack+0x8e/0xa0 [ 31.030711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.031371] remove_vma+0x139/0x170 [ 31.031901] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.032474] do_vmi_munmap+0x1f1/0x2b0 [ 31.032931] __vm_munmap+0x138/0x3a0 [ 31.033373] __x64_sys_munmap+0x59/0x80 [ 31.033844] do_syscall_64+0x3f/0x90 [ 31.034292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.034891] [ 31.035097] The buggy address belongs to the object at ffff88800ca63740 [ 31.035097] which belongs to the cache vm_area_struct of size 168 [ 31.036491] The buggy address is located 88 bytes inside of [ 31.036491] freed 168-byte region [ffff88800ca63740, ffff88800ca637e8) [ 31.037803] [ 31.038008] The buggy address belongs to the physical page: [ 31.038620] page:0000000075b8161c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca63 [ 31.039643] memcg:ffff88800f2c4401 [ 31.040044] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.040651] page_type: 0xffffffff() [ 31.041078] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.041963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2c4401 [ 31.042856] page dumped because: kasan: bad access detected [ 31.043504] [ 31.043715] Memory state around the buggy address: [ 31.044284] ffff88800ca63680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.045118] ffff88800ca63700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.045947] >ffff88800ca63780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.046768] ^ [ 31.047251] ffff88800ca63800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.048101] ffff88800ca63880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.048928] ================================================================== [ 31.050016] Disabling lock debugging due to kernel taint [ 32.933275] BUG: Bad rss-counter state mm:0000000015956ceb type:MM_FILEPAGES val:33 [ 32.934428] BUG: Bad rss-counter state mm:0000000015956ceb type:MM_ANONPAGES val:22 [ 33.422490] BUG: Bad rss-counter state mm:00000000265299c5 type:MM_FILEPAGES val:33 [ 33.423841] BUG: Bad rss-counter state mm:00000000265299c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7311' (ECDSA) to the list of known hosts. 2023/06/20 22:35:31 fuzzer started 2023/06/20 22:35:31 dialing manager at localhost:36067 2023/06/20 22:35:31 checking machine... 2023/06/20 22:35:31 checking revisions... [ 34.018321] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:35:31 testing simple program... [ 34.063754] cgroup: Unknown subsys name 'net' [ 34.098471] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:31 Registers: info registers vcpu 0 RAX=ffffffff810bd033 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801cd77301 RSI=ffff88801cd773e8 RDI=ffff88801cd773e8 RBP=ffff88801cd77448 RSP=ffff88801cd77328 R8 =ffffffff86098096 R9 =ffff88801cd77430 R10=0000000000038001 R11=0000000000006097 R12=ffff88801cd77450 R13=ffff88801cd77438 R14=ffff88801cd773f0 R15=ffff88801cd773f0 RIP=ffffffff8112fbf3 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 00007f830ca08900 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=00007ffd79a88000 CR3=0000000015f10000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f901a141df0 CR3=0000000016b38000 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=2030333a35333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a35333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000