syzkaller login: [ 37.781787] BUG: Bad rss-counter state mm:00000000f79659bd type:MM_FILEPAGES val:33 [ 37.782678] BUG: Bad rss-counter state mm:00000000f79659bd type:MM_ANONPAGES val:22 [ 37.954370] ================================================================== [ 37.955418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.956354] Read of size 8 at addr ffff88800e158ed8 by task sshd/222 [ 37.957254] [ 37.957524] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.958404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.959396] Call Trace: [ 37.959740] [ 37.960028] dump_stack_lvl+0x91/0xf0 [ 37.960518] print_report+0xcc/0x620 [ 37.961012] ? __virt_addr_valid+0x102/0x340 [ 37.961565] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.962184] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.962829] kasan_report+0xbe/0xf0 [ 37.963308] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.963933] vma_interval_tree_remove+0xc75/0xec0 [ 37.964543] vma_prepare+0xc54/0x11a0 [ 37.965028] __split_vma+0x5af/0x950 [ 37.965513] ? __pfx___split_vma+0x10/0x10 [ 37.966055] ? find_held_lock+0x2c/0x110 [ 37.966593] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.967174] ? lock_is_held_type+0x9f/0x120 [ 37.967710] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.968308] ? mtree_range_walk+0x632/0x900 [ 37.968858] ? mas_walk+0x5c7/0x7c0 [ 37.969330] do_vmi_munmap+0x1f1/0x2b0 [ 37.969821] mmap_region+0x1f9/0x2660 [ 37.970301] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.970817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.971540] ? __pfx_lock_acquire+0x10/0x10 [ 37.972081] ? __pfx_mmap_region+0x10/0x10 [ 37.972622] ? security_mmap_addr+0x7d/0xa0 [ 37.973154] ? get_unmapped_area+0x1f5/0x3f0 [ 37.973708] do_mmap+0x854/0xf00 [ 37.974146] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.974656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.975242] ksys_mmap_pgoff+0x3af/0x500 [ 37.975763] do_syscall_64+0x3f/0x90 [ 37.976258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.976933] RIP: 0033:0x7fdf116d3d82 [ 37.977397] 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 [ 37.979594] RSP: 002b:00007ffd698a3d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.980500] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf116d3d82 [ 37.981352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf10b0d000 [ 37.982198] RBP: 00007fdf10b0d000 R08: 0000000000000009 R09: 0000000000001000 [ 37.983051] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559210e6b20 [ 37.983901] R13: 00007ffd698a3d30 R14: 00007ffd698a3d60 R15: 00007ffd698a40c0 [ 37.984748] [ 37.985040] [ 37.985255] Allocated by task 213: [ 37.985686] kasan_save_stack+0x22/0x50 [ 37.986189] kasan_set_track+0x25/0x30 [ 37.986683] __kasan_slab_alloc+0x59/0x70 [ 37.987231] kmem_cache_alloc+0x16b/0x370 [ 37.987746] vm_area_dup+0x20/0x160 [ 37.988218] __split_vma+0x170/0x950 [ 37.988706] split_vma+0xc6/0x110 [ 37.989164] mprotect_fixup+0x8d2/0xb30 [ 37.989688] do_mprotect_pkey+0x87e/0xd40 [ 37.990232] __x64_sys_mprotect+0x78/0xc0 [ 37.990786] do_syscall_64+0x3f/0x90 [ 37.991283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.991964] [ 37.992193] Freed by task 213: [ 37.992602] kasan_save_stack+0x22/0x50 [ 37.993123] kasan_set_track+0x25/0x30 [ 37.993647] kasan_save_free_info+0x2b/0x50 [ 37.994204] __kasan_slab_free+0x10a/0x190 [ 37.994773] kmem_cache_free+0x10d/0x4d0 [ 37.995311] rcu_core+0x8c8/0x2860 [ 37.995777] __do_softirq+0x1b7/0x7d4 [ 37.996276] [ 37.996502] Last potentially related work creation: [ 37.997120] kasan_save_stack+0x22/0x50 [ 37.997643] __kasan_record_aux_stack+0x8e/0xa0 [ 37.998274] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.998978] remove_vma+0x139/0x170 [ 37.999453] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.000029] do_vmi_munmap+0x1f1/0x2b0 [ 38.000541] __vm_munmap+0x138/0x3a0 [ 38.001034] __x64_sys_munmap+0x59/0x80 [ 38.001561] do_syscall_64+0x3f/0x90 [ 38.002057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.002745] [ 38.002974] Second to last potentially related work creation: [ 38.003701] kasan_save_stack+0x22/0x50 [ 38.004230] __kasan_record_aux_stack+0x8e/0xa0 [ 38.004823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.005494] remove_vma+0x139/0x170 [ 38.005971] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.006559] do_vmi_munmap+0x1f1/0x2b0 [ 38.007088] mmap_region+0x1f9/0x2660 [ 38.007589] do_mmap+0x854/0xf00 [ 38.008046] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.008559] ksys_mmap_pgoff+0x3af/0x500 [ 38.009086] do_syscall_64+0x3f/0x90 [ 38.009579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.010247] [ 38.010473] The buggy address belongs to the object at ffff88800e158e80 [ 38.010473] which belongs to the cache vm_area_struct of size 168 [ 38.012026] The buggy address is located 88 bytes inside of [ 38.012026] freed 168-byte region [ffff88800e158e80, ffff88800e158f28) [ 38.013502] [ 38.013726] The buggy address belongs to the physical page: [ 38.014424] page:0000000039492399 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe158 [ 38.015585] memcg:ffff88800e1a0101 [ 38.016032] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.016710] page_type: 0xffffffff() [ 38.017179] raw: 0100000000000200 ffff88800879fc80 ffffea0000405340 dead000000000002 [ 38.018136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1a0101 [ 38.019093] page dumped because: kasan: bad access detected [ 38.019791] [ 38.020019] Memory state around the buggy address: [ 38.020629] ffff88800e158d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.021536] ffff88800e158e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.022443] >ffff88800e158e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.023367] ^ [ 38.024127] ffff88800e158f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.025022] ffff88800e158f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.025922] ================================================================== [ 38.026949] Disabling lock debugging due to kernel taint [ 40.211915] BUG: Bad rss-counter state mm:00000000ef33ff87 type:MM_FILEPAGES val:33 [ 40.212687] BUG: Bad rss-counter state mm:00000000ef33ff87 type:MM_ANONPAGES val:22 [ 40.611445] BUG: Bad rss-counter state mm:00000000473e46e1 type:MM_FILEPAGES val:33 [ 40.612697] BUG: Bad rss-counter state mm:00000000473e46e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59095' (ECDSA) to the list of known hosts. 2023/06/19 17:53:13 fuzzer started 2023/06/19 17:53:13 dialing manager at localhost:44161 2023/06/19 17:53:13 checking machine... 2023/06/19 17:53:13 checking revisions... [ 41.267304] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:53:13 testing simple program... [ 41.310215] cgroup: Unknown subsys name 'net' [ 41.356053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:53:06 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=00007ffe164b4fb8 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=00007f062e5ff51000005624ebbf1790 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=ffffffff85b76940 RBX=ffff88801929e1c0 RCX=1ffff1100118f02f RDX=dffffc0000000000 RSI=ffffffff8386618f RDI=ffff888008c78188 RBP=ffffffff87f94640 RSP=ffff888016057dc8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888008c78000 R15=0000000000000001 RIP=ffffffff838661bf 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 00007f20a101a900 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=00007f20a15d1618 CR3=000000000ea30000 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