syzkaller login: [ 28.833152] BUG: Bad rss-counter state mm:0000000014bf5269 type:MM_FILEPAGES val:33 [ 28.834222] BUG: Bad rss-counter state mm:0000000014bf5269 type:MM_ANONPAGES val:22 [ 29.010857] ================================================================== [ 29.011895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.012886] Read of size 8 at addr ffff8880094d5ed8 by task sshd/220 [ 29.013758] [ 29.013976] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.014851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.015829] Call Trace: [ 29.016167] [ 29.016466] dump_stack_lvl+0x91/0xf0 [ 29.016962] print_report+0xcc/0x620 [ 29.017443] ? __virt_addr_valid+0x102/0x340 [ 29.017993] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.018627] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.019255] kasan_report+0xbe/0xf0 [ 29.019747] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.020404] vma_interval_tree_remove+0xc75/0xec0 [ 29.021039] vma_prepare+0xc54/0x11a0 [ 29.021545] __split_vma+0x5af/0x950 [ 29.022034] ? __pfx___split_vma+0x10/0x10 [ 29.022622] ? find_held_lock+0x2c/0x110 [ 29.023164] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.023754] ? lock_is_held_type+0x9f/0x120 [ 29.024315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.024929] ? mtree_range_walk+0x632/0x900 [ 29.025513] ? mas_walk+0x5c7/0x7c0 [ 29.025998] do_vmi_munmap+0x1f1/0x2b0 [ 29.026493] mmap_region+0x1f9/0x2660 [ 29.026987] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.027495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.028208] ? __pfx_lock_acquire+0x10/0x10 [ 29.028740] ? __pfx_mmap_region+0x10/0x10 [ 29.029272] ? security_mmap_addr+0x7d/0xa0 [ 29.029811] ? get_unmapped_area+0x1f5/0x3f0 [ 29.030361] do_mmap+0x854/0xf00 [ 29.030812] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.031306] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.031869] ksys_mmap_pgoff+0x3af/0x500 [ 29.032414] do_syscall_64+0x3f/0x90 [ 29.032907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.033567] RIP: 0033:0x7f3ff867dd82 [ 29.034028] 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 [ 29.036193] RSP: 002b:00007ffe4ad98b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.037118] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ff867dd82 [ 29.037962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ff7ab7000 [ 29.038814] RBP: 00007f3ff7ab7000 R08: 0000000000000009 R09: 0000000000001000 [ 29.039665] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fcd37dec0 [ 29.040516] R13: 00007ffe4ad98ba0 R14: 00007ffe4ad98bd0 R15: 00007ffe4ad98f30 [ 29.041378] [ 29.041678] [ 29.041904] Allocated by task 212: [ 29.042336] kasan_save_stack+0x22/0x50 [ 29.042864] kasan_set_track+0x25/0x30 [ 29.043360] __kasan_slab_alloc+0x59/0x70 [ 29.043890] kmem_cache_alloc+0x16b/0x370 [ 29.044409] vm_area_dup+0x20/0x160 [ 29.044866] __split_vma+0x170/0x950 [ 29.045336] split_vma+0xc6/0x110 [ 29.045774] mprotect_fixup+0x8d2/0xb30 [ 29.046279] do_mprotect_pkey+0x87e/0xd40 [ 29.046833] __x64_sys_mprotect+0x78/0xc0 [ 29.047372] do_syscall_64+0x3f/0x90 [ 29.047879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.048527] [ 29.048746] Freed by task 212: [ 29.049143] kasan_save_stack+0x22/0x50 [ 29.049653] kasan_set_track+0x25/0x30 [ 29.050155] kasan_save_free_info+0x2b/0x50 [ 29.050709] __kasan_slab_free+0x10a/0x190 [ 29.051248] kmem_cache_free+0x10d/0x4d0 [ 29.051755] rcu_core+0x8c8/0x2860 [ 29.052242] __do_softirq+0x1b7/0x7d4 [ 29.052737] [ 29.052962] Last potentially related work creation: [ 29.053547] kasan_save_stack+0x22/0x50 [ 29.054064] __kasan_record_aux_stack+0x8e/0xa0 [ 29.054641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.055284] remove_vma+0x139/0x170 [ 29.055743] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.056315] do_vmi_munmap+0x1f1/0x2b0 [ 29.056802] __vm_munmap+0x138/0x3a0 [ 29.057273] __x64_sys_munmap+0x59/0x80 [ 29.057777] do_syscall_64+0x3f/0x90 [ 29.058257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.058932] [ 29.059158] The buggy address belongs to the object at ffff8880094d5e80 [ 29.059158] which belongs to the cache vm_area_struct of size 168 [ 29.060630] The buggy address is located 88 bytes inside of [ 29.060630] freed 168-byte region [ffff8880094d5e80, ffff8880094d5f28) [ 29.062048] [ 29.062264] The buggy address belongs to the physical page: [ 29.062943] page:00000000ae3ec58b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94d5 [ 29.064092] memcg:ffff88800e573501 [ 29.064545] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.065239] page_type: 0xffffffff() [ 29.065708] raw: 0100000000000200 ffff8880087a0c80 ffffea00003988c0 dead000000000002 [ 29.066700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e573501 [ 29.067668] page dumped because: kasan: bad access detected [ 29.068380] [ 29.068607] Memory state around the buggy address: [ 29.069221] ffff8880094d5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.070139] ffff8880094d5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.071065] >ffff8880094d5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.071973] ^ [ 29.072788] ffff8880094d5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.073704] ffff8880094d5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.074625] ================================================================== [ 29.075718] Disabling lock debugging due to kernel taint [ 31.100184] BUG: Bad rss-counter state mm:0000000099b989e4 type:MM_FILEPAGES val:33 [ 31.101496] BUG: Bad rss-counter state mm:0000000099b989e4 type:MM_ANONPAGES val:22 [ 31.489817] BUG: Bad rss-counter state mm:000000006a214ebb type:MM_FILEPAGES val:33 [ 31.490813] BUG: Bad rss-counter state mm:000000006a214ebb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10559' (ECDSA) to the list of known hosts. 2023/06/20 20:44:04 fuzzer started 2023/06/20 20:44:04 dialing manager at localhost:36067 2023/06/20 20:44:04 checking machine... 2023/06/20 20:44:04 checking revisions... [ 32.233275] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:44:05 testing simple program... [ 32.275381] cgroup: Unknown subsys name 'net' [ 32.333074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:44:04 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff838702a3 RDX=ffff88800cb7d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800947fd90 RSP=ffff88800947fc90 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000002 R11=00000000000b6a61 R12=0000000000000004 R13=0000000000000001 R14=ffff8880094bd6b8 R15=ffff8880094bd080 RIP=ffffffff814c086b 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 00007fd475a33900 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=00007fd475fea618 CR3=000000000ff50000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008c04400 RCX=1ffff110011b9844 RDX=ffff888008dcc200 RSI=ffffffff813ae2f2 RDI=ffff888008dcc220 RBP=0000000000000001 RSP=ffff88806cf099a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=ffff888008c04410 R13=0000000000000000 R14=ffffffff852c7908 R15=ffff888008dcc180 RIP=ffffffff81268d62 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 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=00007fa731eaa630 CR3=000000000d8f4000 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=29c211a0331f86afe24e0a972a4b8981 XMM02=2c67c8bc2e329bc3000000000011af90 XMM03=fb795ef6d657705600000000001220e8 XMM04=5db1c873e8ca2d9500000000000ae988 XMM05=3fa39f6022ecf9a00000000000132950 XMM06=4fda316b135da52b00000000001325d8 XMM07=e042d86d42eb936e00000000001223c0 XMM08=491ec2358e6b9d9d000000000011aff0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000