syzkaller login: [ 42.858218] BUG: Bad rss-counter state mm:00000000b4b0a9e7 type:MM_FILEPAGES val:33 [ 42.859762] BUG: Bad rss-counter state mm:00000000b4b0a9e7 type:MM_ANONPAGES val:22 [ 43.029860] ================================================================== [ 43.030865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.031880] Read of size 8 at addr ffff88800d7b1228 by task sshd/223 [ 43.032727] [ 43.033078] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.034047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.035171] Call Trace: [ 43.035532] [ 43.035849] dump_stack_lvl+0x91/0xf0 [ 43.036409] print_report+0xcc/0x620 [ 43.036957] ? __virt_addr_valid+0x102/0x340 [ 43.037578] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.038271] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.038964] kasan_report+0xbe/0xf0 [ 43.039494] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.040186] vma_interval_tree_remove+0xc75/0xec0 [ 43.040867] vma_prepare+0xc54/0x11a0 [ 43.041399] __split_vma+0x5af/0x950 [ 43.041926] ? __pfx___split_vma+0x10/0x10 [ 43.042520] ? find_held_lock+0x2c/0x110 [ 43.043104] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.043735] ? lock_is_held_type+0x9f/0x120 [ 43.044357] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.045033] ? mtree_range_walk+0x632/0x900 [ 43.045649] ? mas_walk+0x5c7/0x7c0 [ 43.046175] do_vmi_munmap+0x1f1/0x2b0 [ 43.046727] mmap_region+0x1f9/0x2660 [ 43.047270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.047835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.048643] ? __pfx_lock_acquire+0x10/0x10 [ 43.049239] ? __pfx_mmap_region+0x10/0x10 [ 43.049826] ? security_mmap_addr+0x7d/0xa0 [ 43.050426] ? get_unmapped_area+0x1f5/0x3f0 [ 43.051040] do_mmap+0x854/0xf00 [ 43.051530] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.052082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.052733] ksys_mmap_pgoff+0x3af/0x500 [ 43.053305] do_syscall_64+0x3f/0x90 [ 43.053835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.054559] RIP: 0033:0x7fdbdc759d82 [ 43.055069] 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 [ 43.057461] RSP: 002b:00007ffc9c4842b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.058474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbdc759d82 [ 43.059428] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbdbb93000 [ 43.060391] RBP: 00007fdbdbb93000 R08: 0000000000000009 R09: 0000000000001000 [ 43.061333] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa00f0c980 [ 43.062273] R13: 00007ffc9c4842d0 R14: 00007ffc9c484300 R15: 00007ffc9c484660 [ 43.063225] [ 43.063548] [ 43.063785] Allocated by task 216: [ 43.064264] kasan_save_stack+0x22/0x50 [ 43.064853] kasan_set_track+0x25/0x30 [ 43.065408] __kasan_slab_alloc+0x59/0x70 [ 43.065993] kmem_cache_alloc+0x16b/0x370 [ 43.066567] vm_area_dup+0x20/0x160 [ 43.067071] __split_vma+0x170/0x950 [ 43.067595] split_vma+0xc6/0x110 [ 43.068083] mprotect_fixup+0x8d2/0xb30 [ 43.068651] do_mprotect_pkey+0x87e/0xd40 [ 43.069236] __x64_sys_mprotect+0x78/0xc0 [ 43.069820] do_syscall_64+0x3f/0x90 [ 43.070349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.071063] [ 43.071303] Freed by task 205: [ 43.071740] kasan_save_stack+0x22/0x50 [ 43.072304] kasan_set_track+0x25/0x30 [ 43.072876] kasan_save_free_info+0x2b/0x50 [ 43.073473] __kasan_slab_free+0x10a/0x190 [ 43.074155] kmem_cache_free+0x10d/0x4d0 [ 43.074726] rcu_core+0x8c8/0x2860 [ 43.075218] __do_softirq+0x1b7/0x7d4 [ 43.075750] [ 43.075988] Last potentially related work creation: [ 43.076646] kasan_save_stack+0x22/0x50 [ 43.077210] __kasan_record_aux_stack+0x8e/0xa0 [ 43.077854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.078565] remove_vma+0x139/0x170 [ 43.079069] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.079692] do_vmi_munmap+0x1f1/0x2b0 [ 43.080236] __vm_munmap+0x138/0x3a0 [ 43.080770] __x64_sys_munmap+0x59/0x80 [ 43.081325] do_syscall_64+0x3f/0x90 [ 43.081848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.082564] [ 43.082802] Second to last potentially related work creation: [ 43.083563] kasan_save_stack+0x22/0x50 [ 43.084122] __kasan_record_aux_stack+0x8e/0xa0 [ 43.084781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.085495] remove_vma+0x139/0x170 [ 43.085996] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.086617] do_vmi_munmap+0x1f1/0x2b0 [ 43.087154] mmap_region+0x1f9/0x2660 [ 43.087685] do_mmap+0x854/0xf00 [ 43.088166] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.088712] ksys_mmap_pgoff+0x3af/0x500 [ 43.089274] do_syscall_64+0x3f/0x90 [ 43.089801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.090520] [ 43.090762] The buggy address belongs to the object at ffff88800d7b11d0 [ 43.090762] which belongs to the cache vm_area_struct of size 168 [ 43.092422] The buggy address is located 88 bytes inside of [ 43.092422] freed 168-byte region [ffff88800d7b11d0, ffff88800d7b1278) [ 43.093944] [ 43.094178] The buggy address belongs to the physical page: [ 43.094886] page:00000000d7081dc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7b1 [ 43.096049] memcg:ffff88800dbe1d01 [ 43.096519] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.097269] page_type: 0xffffffff() [ 43.097760] raw: 0100000000000200 ffff88800879fc80 ffffea000060a100 dead000000000005 [ 43.098750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbe1d01 [ 43.099724] page dumped because: kasan: bad access detected [ 43.100439] [ 43.100671] Memory state around the buggy address: [ 43.101293] ffff88800d7b1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.102202] ffff88800d7b1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 43.103141] >ffff88800d7b1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 43.104091] ^ [ 43.104721] ffff88800d7b1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 43.105672] ffff88800d7b1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 43.106625] ================================================================== [ 43.107681] Disabling lock debugging due to kernel taint [ 45.239283] BUG: Bad rss-counter state mm:000000008446b97f type:MM_FILEPAGES val:33 [ 45.240110] BUG: Bad rss-counter state mm:000000008446b97f type:MM_ANONPAGES val:22 [ 45.769189] BUG: Bad rss-counter state mm:0000000068ff7b22 type:MM_FILEPAGES val:33 [ 45.770507] BUG: Bad rss-counter state mm:0000000068ff7b22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62177' (ECDSA) to the list of known hosts. 2023/06/19 16:37:48 fuzzer started 2023/06/19 16:37:49 dialing manager at localhost:44161 2023/06/19 16:37:49 checking machine... 2023/06/19 16:37:49 checking revisions... [ 46.495198] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:37:49 testing simple program... [ 46.544403] cgroup: Unknown subsys name 'net' [ 46.591130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:37:36 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=ffff888008c58000 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=00007fff898d3928 CR3=00000000162e4000 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=2038343a37333a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3233 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3233325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055e201bb65f0 RCX=0000000000000000 RDX=00007f097dc3e7c0 RSI=000055e201bb65f0 RDI=00007ffc3e520cc8 RBP=00007ffc3e520f70 RSP=00007ffc3e520d08 R8 =000000000000006b R9 =0000000000000001 R10=0000000000000002 R11=00007f097c50d5d0 R12=000055e201bb6400 R13=0000000000000000 R14=0000000000000000 R15=00007ffc3e520f18 RIP=00007f097db7efce RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f097cfec900 00000000 00000000 GS =0000 0000000000000000 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=00007f9e61232650 CR3=000000000e7ac000 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=b3285ca56c489dff000000000010bf78 XMM01=c545ceb326d832afd34c592fadafafcc XMM02=ec2efd57dc4c00df000000000011d338 XMM03=f376d8ba19914c43000000000011d408 XMM04=d21cd12744865d1300000000000ae988 XMM05=5a9d233068761c4a00000000001350a0 XMM06=db20f175d54767f00000000000134f28 XMM07=e042d86d42eb936e0000000000124408 XMM08=f376d8ba19914c43000000000011d408 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000