syzkaller login: [ 30.836622] BUG: Bad rss-counter state mm:000000003380e525 type:MM_FILEPAGES val:33 [ 30.838606] BUG: Bad rss-counter state mm:000000003380e525 type:MM_ANONPAGES val:22 [ 31.000251] ================================================================== [ 31.001168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.002101] Read of size 8 at addr ffff88800deef4e0 by task sshd/219 [ 31.002875] [ 31.003092] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.004086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.005101] Call Trace: [ 31.005424] [ 31.005721] dump_stack_lvl+0x91/0xf0 [ 31.006217] print_report+0xcc/0x620 [ 31.006704] ? __virt_addr_valid+0x102/0x340 [ 31.007257] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.007880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008515] kasan_report+0xbe/0xf0 [ 31.008991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.009614] vma_interval_tree_remove+0xc75/0xec0 [ 31.010225] vma_prepare+0xc54/0x11a0 [ 31.010715] __split_vma+0x5af/0x950 [ 31.011193] ? __pfx___split_vma+0x10/0x10 [ 31.011727] ? find_held_lock+0x2c/0x110 [ 31.012274] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.012845] ? lock_is_held_type+0x9f/0x120 [ 31.013394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.013998] ? mtree_range_walk+0x632/0x900 [ 31.014560] ? mas_walk+0x5c7/0x7c0 [ 31.015037] do_vmi_munmap+0x1f1/0x2b0 [ 31.015528] mmap_region+0x1f9/0x2660 [ 31.016007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.016543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.017263] ? __pfx_lock_acquire+0x10/0x10 [ 31.017795] ? __pfx_mmap_region+0x10/0x10 [ 31.018335] ? security_mmap_addr+0x7d/0xa0 [ 31.018868] ? get_unmapped_area+0x1f5/0x3f0 [ 31.019418] do_mmap+0x854/0xf00 [ 31.019860] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.020362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.020926] ksys_mmap_pgoff+0x3af/0x500 [ 31.021443] do_syscall_64+0x3f/0x90 [ 31.021928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022577] RIP: 0033:0x7f745b95ad82 [ 31.023040] 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 [ 31.025177] RSP: 002b:00007ffea3b2cbe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.026084] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f745b95ad82 [ 31.026930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f745ad94000 [ 31.027775] RBP: 00007f745ad94000 R08: 0000000000000009 R09: 0000000000001000 [ 31.028646] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e6366aec0 [ 31.029494] R13: 00007ffea3b2cc00 R14: 00007ffea3b2cc30 R15: 00007ffea3b2cf90 [ 31.030359] [ 31.030657] [ 31.030872] Allocated by task 212: [ 31.031296] kasan_save_stack+0x22/0x50 [ 31.031803] kasan_set_track+0x25/0x30 [ 31.032310] __kasan_slab_alloc+0x59/0x70 [ 31.032843] kmem_cache_alloc+0x16b/0x370 [ 31.033366] vm_area_dup+0x20/0x160 [ 31.033831] __split_vma+0x170/0x950 [ 31.034305] split_vma+0xc6/0x110 [ 31.034750] mprotect_fixup+0x8d2/0xb30 [ 31.035254] do_mprotect_pkey+0x87e/0xd40 [ 31.035784] __x64_sys_mprotect+0x78/0xc0 [ 31.036327] do_syscall_64+0x3f/0x90 [ 31.036811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037457] [ 31.037677] Freed by task 212: [ 31.038071] kasan_save_stack+0x22/0x50 [ 31.038578] kasan_set_track+0x25/0x30 [ 31.039071] kasan_save_free_info+0x2b/0x50 [ 31.039609] __kasan_slab_free+0x10a/0x190 [ 31.040152] kmem_cache_free+0x10d/0x4d0 [ 31.040665] rcu_core+0x8c8/0x2860 [ 31.041109] __do_softirq+0x1b7/0x7d4 [ 31.041590] [ 31.041803] Last potentially related work creation: [ 31.042383] kasan_save_stack+0x22/0x50 [ 31.042885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.043466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.044119] remove_vma+0x139/0x170 [ 31.044599] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.045159] do_vmi_munmap+0x1f1/0x2b0 [ 31.045652] __vm_munmap+0x138/0x3a0 [ 31.046119] __x64_sys_munmap+0x59/0x80 [ 31.046624] do_syscall_64+0x3f/0x90 [ 31.047107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.047760] [ 31.047976] Second to last potentially related work creation: [ 31.048699] kasan_save_stack+0x22/0x50 [ 31.049243] __kasan_record_aux_stack+0x8e/0xa0 [ 31.049854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.050548] remove_vma+0x139/0x170 [ 31.051028] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.051626] do_vmi_munmap+0x1f1/0x2b0 [ 31.052144] __vm_munmap+0x138/0x3a0 [ 31.052644] elf_map+0x26f/0x310 [ 31.053115] load_elf_binary+0xd82/0x5030 [ 31.053671] bprm_execve+0x803/0x1940 [ 31.054163] do_execveat_common+0x734/0x8e0 [ 31.054721] __x64_sys_execve+0x93/0xc0 [ 31.055242] do_syscall_64+0x3f/0x90 [ 31.055737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.056443] [ 31.056671] The buggy address belongs to the object at ffff88800deef488 [ 31.056671] which belongs to the cache vm_area_struct of size 168 [ 31.058256] The buggy address is located 88 bytes inside of [ 31.058256] freed 168-byte region [ffff88800deef488, ffff88800deef530) [ 31.059747] [ 31.059978] The buggy address belongs to the physical page: [ 31.060673] page:000000006be75f8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeef [ 31.061824] memcg:ffff88800e55ff01 [ 31.062280] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.063020] page_type: 0xffffffff() [ 31.063496] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385c80 dead000000000007 [ 31.064480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e55ff01 [ 31.065451] page dumped because: kasan: bad access detected [ 31.066153] [ 31.066384] Memory state around the buggy address: [ 31.067004] ffff88800deef380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.067907] ffff88800deef400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.068850] >ffff88800deef480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.069748] ^ [ 31.070535] ffff88800deef500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.071433] ffff88800deef580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.072343] ================================================================== [ 31.073360] Disabling lock debugging due to kernel taint [ 33.253527] BUG: Bad rss-counter state mm:000000001bd199b1 type:MM_FILEPAGES val:33 [ 33.254721] BUG: Bad rss-counter state mm:000000001bd199b1 type:MM_ANONPAGES val:22 [ 33.784562] BUG: Bad rss-counter state mm:00000000be9981df type:MM_FILEPAGES val:33 [ 33.786181] BUG: Bad rss-counter state mm:00000000be9981df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11811' (ECDSA) to the list of known hosts. 2023/06/20 20:58:53 fuzzer started 2023/06/20 20:58:53 dialing manager at localhost:36067 2023/06/20 20:58:53 checking machine... 2023/06/20 20:58:53 checking revisions... [ 34.507763] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:58:53 testing simple program... [ 34.556980] cgroup: Unknown subsys name 'net' [ 34.594356] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:58:53 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000053 RCX=ffffffff82157d7a RDX=000055a0efac9223 RSI=0000000000000000 RDI=0000000000000007 RBP=000055a0efac91d0 RSP=ffff888015c577a8 R8 =0000000000000007 R9 =0000000000000000 R10=000055a0efac9223 R11=00000000000b6a61 R12=ffff8880087e4800 R13=000055a0efac9223 R14=0000000000000000 R15=ffff888015c57e70 RIP=ffffffff814c0250 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 00007f31e9826900 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=00007f5f7a5ab650 CR3=0000000009740000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b1599502e40c722400000000000ae988 XMM05=e4994afae282aaf50000000000134430 XMM06=806171799158d9670000000000133220 XMM07=fb795ef6d65770560000000000121d98 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff8880167b4e40 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880167b4e44 RBP=1ffff1100202cf83 RSP=ffff888010167c10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000202 R13=ffff8880167b4e80 R14=ffffffff818c73ee R15=ffff88800f216980 RIP=ffffffff812e009a RFL=00000046 [---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 00007f5f79ff6900 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=00007f5f7a5ad618 CR3=000000000df9c000 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=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