syzkaller login: [ 33.782149] BUG: Bad rss-counter state mm:00000000bd3b6a6e type:MM_FILEPAGES val:33 [ 33.784079] BUG: Bad rss-counter state mm:00000000bd3b6a6e type:MM_ANONPAGES val:22 [ 33.931029] ================================================================== [ 33.931936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.932868] Read of size 8 at addr ffff88801a80aed8 by task sshd/221 [ 33.933646] [ 33.933865] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.934865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.935910] Call Trace: [ 33.936232] [ 33.936518] dump_stack_lvl+0x91/0xf0 [ 33.937003] print_report+0xcc/0x620 [ 33.937555] ? __virt_addr_valid+0x102/0x340 [ 33.938106] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.938722] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.939376] kasan_report+0xbe/0xf0 [ 33.939857] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.940470] vma_interval_tree_remove+0xc75/0xec0 [ 33.941070] vma_prepare+0xc54/0x11a0 [ 33.941545] __split_vma+0x5af/0x950 [ 33.942014] ? __pfx___split_vma+0x10/0x10 [ 33.942542] ? find_held_lock+0x2c/0x110 [ 33.943083] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.943670] ? lock_is_held_type+0x9f/0x120 [ 33.944208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.944815] ? mtree_range_walk+0x632/0x900 [ 33.945364] ? mas_walk+0x5c7/0x7c0 [ 33.945838] do_vmi_munmap+0x1f1/0x2b0 [ 33.946328] mmap_region+0x1f9/0x2660 [ 33.946806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.947368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.948089] ? __pfx_lock_acquire+0x10/0x10 [ 33.948623] ? __pfx_mmap_region+0x10/0x10 [ 33.949156] ? security_mmap_addr+0x7d/0xa0 [ 33.949681] ? get_unmapped_area+0x1f5/0x3f0 [ 33.950229] do_mmap+0x854/0xf00 [ 33.950668] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.951201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.951768] ksys_mmap_pgoff+0x3af/0x500 [ 33.952277] do_syscall_64+0x3f/0x90 [ 33.952767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.953410] RIP: 0033:0x7f957b627d82 [ 33.953867] 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 [ 33.956025] RSP: 002b:00007fffd36f62f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.956933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f957b627d82 [ 33.957785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f957aa61000 [ 33.958637] RBP: 00007f957aa61000 R08: 0000000000000009 R09: 0000000000001000 [ 33.959528] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c16944df60 [ 33.960381] R13: 00007fffd36f6310 R14: 00007fffd36f6340 R15: 00007fffd36f66a0 [ 33.961229] [ 33.961517] [ 33.961728] Allocated by task 214: [ 33.962153] kasan_save_stack+0x22/0x50 [ 33.962652] kasan_set_track+0x25/0x30 [ 33.963169] __kasan_slab_alloc+0x59/0x70 [ 33.963700] kmem_cache_alloc+0x16b/0x370 [ 33.964209] vm_area_dup+0x20/0x160 [ 33.964669] __split_vma+0x170/0x950 [ 33.965136] split_vma+0xc6/0x110 [ 33.965582] mprotect_fixup+0x8d2/0xb30 [ 33.966082] do_mprotect_pkey+0x87e/0xd40 [ 33.966603] __x64_sys_mprotect+0x78/0xc0 [ 33.967173] do_syscall_64+0x3f/0x90 [ 33.967650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.968290] [ 33.968510] Freed by task 214: [ 33.968907] kasan_save_stack+0x22/0x50 [ 33.969420] kasan_set_track+0x25/0x30 [ 33.969905] kasan_save_free_info+0x2b/0x50 [ 33.970436] __kasan_slab_free+0x10a/0x190 [ 33.970964] kmem_cache_free+0x10d/0x4d0 [ 33.971501] rcu_core+0x8c8/0x2860 [ 33.971947] __do_softirq+0x1b7/0x7d4 [ 33.972422] [ 33.972637] Last potentially related work creation: [ 33.973218] kasan_save_stack+0x22/0x50 [ 33.973718] __kasan_record_aux_stack+0x8e/0xa0 [ 33.974294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.974930] remove_vma+0x139/0x170 [ 33.975433] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.976058] do_vmi_munmap+0x1f1/0x2b0 [ 33.976549] __vm_munmap+0x138/0x3a0 [ 33.977016] __x64_sys_munmap+0x59/0x80 [ 33.977518] do_syscall_64+0x3f/0x90 [ 33.977994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.978634] [ 33.978851] Second to last potentially related work creation: [ 33.979584] kasan_save_stack+0x22/0x50 [ 33.980088] __kasan_record_aux_stack+0x8e/0xa0 [ 33.980661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.981297] remove_vma+0x139/0x170 [ 33.981744] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.982304] do_vmi_munmap+0x1f1/0x2b0 [ 33.982791] mmap_region+0x1f9/0x2660 [ 33.983292] do_mmap+0x854/0xf00 [ 33.983727] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.984218] ksys_mmap_pgoff+0x3af/0x500 [ 33.984722] do_syscall_64+0x3f/0x90 [ 33.985190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.985832] [ 33.986043] The buggy address belongs to the object at ffff88801a80ae80 [ 33.986043] which belongs to the cache vm_area_struct of size 168 [ 33.987561] The buggy address is located 88 bytes inside of [ 33.987561] freed 168-byte region [ffff88801a80ae80, ffff88801a80af28) [ 33.988956] [ 33.989172] The buggy address belongs to the physical page: [ 33.989823] page:000000009ec7687f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a80a [ 33.990914] memcg:ffff88801a80b001 [ 33.991369] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.992015] page_type: 0xffffffff() [ 33.992463] raw: 0100000000000200 ffff88800879fc80 ffffea000067f100 dead00000000000a [ 33.993375] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a80b001 [ 33.994279] page dumped because: kasan: bad access detected [ 33.994956] [ 33.995185] Memory state around the buggy address: [ 33.995780] ffff88801a80ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.996638] ffff88801a80ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.997489] >ffff88801a80ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.998338] ^ [ 33.999062] ffff88801a80af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.999913] ffff88801a80af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.000756] ================================================================== [ 34.001671] Disabling lock debugging due to kernel taint [ 36.035589] BUG: Bad rss-counter state mm:000000000d8b552d type:MM_FILEPAGES val:33 [ 36.036815] BUG: Bad rss-counter state mm:000000000d8b552d type:MM_ANONPAGES val:22 [ 36.601659] BUG: Bad rss-counter state mm:000000003b7fb75a type:MM_FILEPAGES val:33 [ 36.602973] BUG: Bad rss-counter state mm:000000003b7fb75a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50930' (ECDSA) to the list of known hosts. 2023/06/19 15:32:55 fuzzer started 2023/06/19 15:32:55 dialing manager at localhost:44161 2023/06/19 15:32:55 checking machine... 2023/06/19 15:32:55 checking revisions... [ 37.246347] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:32:55 testing simple program... [ 37.287944] cgroup: Unknown subsys name 'net' [ 37.342124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffd6dacdff8 CR3=0000000005482000 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=00007f169d121510000055f2776a4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880161d8000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff8880161d83f4 RBP=ffff8880161d8000 RSP=ffff888015a078d8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007fac85fee477 R13=0000000000000000 R14=ffff8880161d8000 R15=0000000000000001 RIP=ffffffff8135bd9a RFL=00000217 [----APC] 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 00007fac85afb900 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=00007fac860b2618 CR3=000000000efc4000 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=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