syzkaller login: [ 36.822152] BUG: Bad rss-counter state mm:0000000093920a9d type:MM_FILEPAGES val:33 [ 36.823307] BUG: Bad rss-counter state mm:0000000093920a9d type:MM_ANONPAGES val:22 [ 36.983954] ================================================================== [ 36.984980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.985909] Read of size 8 at addr ffff88800fa8d140 by task sshd/221 [ 36.986800] [ 36.987022] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.987898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.988896] Call Trace: [ 36.989217] [ 36.989504] dump_stack_lvl+0x91/0xf0 [ 36.989998] print_report+0xcc/0x620 [ 36.990485] ? __virt_addr_valid+0x102/0x340 [ 36.991040] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.991671] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.992294] kasan_report+0xbe/0xf0 [ 36.992769] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.993399] vma_interval_tree_remove+0xc75/0xec0 [ 36.994006] vma_prepare+0xc54/0x11a0 [ 36.994486] __split_vma+0x5af/0x950 [ 36.994955] ? __pfx___split_vma+0x10/0x10 [ 36.995509] ? find_held_lock+0x2c/0x110 [ 36.996027] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.996592] ? lock_is_held_type+0x9f/0x120 [ 36.997123] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.997726] ? mtree_range_walk+0x632/0x900 [ 36.998270] ? mas_walk+0x5c7/0x7c0 [ 36.998743] do_vmi_munmap+0x1f1/0x2b0 [ 36.999240] mmap_region+0x1f9/0x2660 [ 36.999719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.000230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.000937] ? __pfx_lock_acquire+0x10/0x10 [ 37.001478] ? __pfx_mmap_region+0x10/0x10 [ 37.002008] ? security_mmap_addr+0x7d/0xa0 [ 37.002533] ? get_unmapped_area+0x1f5/0x3f0 [ 37.003076] do_mmap+0x854/0xf00 [ 37.003537] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.004031] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.004587] ksys_mmap_pgoff+0x3af/0x500 [ 37.005089] do_syscall_64+0x3f/0x90 [ 37.005561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.006203] RIP: 0033:0x7f3c83422d82 [ 37.006656] 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 [ 37.008778] RSP: 002b:00007ffc230b5b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.009682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c83422d82 [ 37.010518] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c8285c000 [ 37.011375] RBP: 00007f3c8285c000 R08: 0000000000000009 R09: 0000000000001000 [ 37.012207] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557df2de8f70 [ 37.013049] R13: 00007ffc230b5b70 R14: 00007ffc230b5ba0 R15: 00007ffc230b5f00 [ 37.013896] [ 37.014187] [ 37.014404] Allocated by task 214: [ 37.014832] kasan_save_stack+0x22/0x50 [ 37.015353] kasan_set_track+0x25/0x30 [ 37.015847] __kasan_slab_alloc+0x59/0x70 [ 37.016370] kmem_cache_alloc+0x16b/0x370 [ 37.016884] vm_area_dup+0x20/0x160 [ 37.017342] __split_vma+0x170/0x950 [ 37.017804] split_vma+0xc6/0x110 [ 37.018250] mprotect_fixup+0x8d2/0xb30 [ 37.018750] do_mprotect_pkey+0x87e/0xd40 [ 37.019280] __x64_sys_mprotect+0x78/0xc0 [ 37.019802] do_syscall_64+0x3f/0x90 [ 37.020276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.020913] [ 37.021132] Freed by task 214: [ 37.021526] kasan_save_stack+0x22/0x50 [ 37.022029] kasan_set_track+0x25/0x30 [ 37.022519] kasan_save_free_info+0x2b/0x50 [ 37.023046] __kasan_slab_free+0x10a/0x190 [ 37.023604] kmem_cache_free+0x10d/0x4d0 [ 37.024111] rcu_core+0x8c8/0x2860 [ 37.024562] __do_softirq+0x1b7/0x7d4 [ 37.025034] [ 37.025253] Last potentially related work creation: [ 37.025834] kasan_save_stack+0x22/0x50 [ 37.026335] __kasan_record_aux_stack+0x8e/0xa0 [ 37.026904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.027553] remove_vma+0x139/0x170 [ 37.028005] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.028564] do_vmi_munmap+0x1f1/0x2b0 [ 37.029048] __vm_munmap+0x138/0x3a0 [ 37.029514] __x64_sys_munmap+0x59/0x80 [ 37.030010] do_syscall_64+0x3f/0x90 [ 37.030482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.031115] [ 37.031340] The buggy address belongs to the object at ffff88800fa8d0e8 [ 37.031340] which belongs to the cache vm_area_struct of size 168 [ 37.032789] The buggy address is located 88 bytes inside of [ 37.032789] freed 168-byte region [ffff88800fa8d0e8, ffff88800fa8d190) [ 37.034182] [ 37.034400] The buggy address belongs to the physical page: [ 37.035051] page:0000000081a2bbac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfa8d [ 37.036154] memcg:ffff88800d700301 [ 37.036579] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.037224] page_type: 0xffffffff() [ 37.037688] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.038622] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d700301 [ 37.039535] page dumped because: kasan: bad access detected [ 37.040203] [ 37.040420] Memory state around the buggy address: [ 37.041001] ffff88800fa8d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.041868] ffff88800fa8d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 37.042727] >ffff88800fa8d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.043595] ^ [ 37.044229] ffff88800fa8d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.045082] ffff88800fa8d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.045919] ================================================================== [ 37.046956] Disabling lock debugging due to kernel taint [ 39.120109] BUG: Bad rss-counter state mm:000000004213878f type:MM_FILEPAGES val:33 [ 39.121532] BUG: Bad rss-counter state mm:000000004213878f type:MM_ANONPAGES val:22 [ 39.564500] BUG: Bad rss-counter state mm:00000000bfbda447 type:MM_FILEPAGES val:33 [ 39.565663] BUG: Bad rss-counter state mm:00000000bfbda447 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62801' (ECDSA) to the list of known hosts. 2023/06/19 13:32:46 fuzzer started 2023/06/19 13:32:47 dialing manager at localhost:44161 2023/06/19 13:32:47 checking machine... 2023/06/19 13:32:47 checking revisions... [ 40.148048] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:32:47 testing simple program... [ 40.191065] cgroup: Unknown subsys name 'net' [ 40.240991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:41 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000540 RCX=0000000000000001 RDX=0000000000000cc0 RSI=ffff888009669a00 RDI=ffff888008fce500 RBP=ffff88800f0efd90 RSP=ffff88800f0efd20 R8 =ffff88800f0efd50 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008fce500 R13=ffff888009669a00 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff81803b52 RFL=00000286 [--S--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 00007f93b6950900 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=00007ffefafb4000 CR3=000000000c644000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f5b53f4c430 CR3=0000000009e14000 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=2779718a4bf3e6b1804216d5b8d33f2a XMM02=2c67c8bc2e329bc3000000000011f548 XMM03=fb795ef6d65770560000000000123c10 XMM04=d0e0df3a513bbd4f00000000000ae988 XMM05=e4cb8bb95a7664b600000000001337a8 XMM06=c2a13d32758674f50000000000132610 XMM07=e042d86d42eb936e0000000000123e90 XMM08=f5c20a7630532b3d000000000011f5a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000