syzkaller login: [ 60.915373] BUG: Bad rss-counter state mm:00000000647db76b type:MM_FILEPAGES val:33 [ 60.916643] BUG: Bad rss-counter state mm:00000000647db76b type:MM_ANONPAGES val:22 [ 60.956346] ================================================================== [ 60.957523] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.958465] Read of size 8 at addr ffff88800c8daa50 by task sshd/220 [ 60.959384] [ 60.959602] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.960463] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.961478] Call Trace: [ 60.961811] [ 60.962102] dump_stack_lvl+0x91/0xf0 [ 60.962598] print_report+0xcc/0x620 [ 60.963088] ? __virt_addr_valid+0x102/0x340 [ 60.963668] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.964303] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.964925] kasan_report+0xbe/0xf0 [ 60.965410] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.966033] vma_interval_tree_remove+0xc75/0xec0 [ 60.966631] vma_prepare+0xc54/0x11a0 [ 60.967108] __split_vma+0x5af/0x950 [ 60.967608] ? __pfx___split_vma+0x10/0x10 [ 60.968137] ? find_held_lock+0x2c/0x110 [ 60.968667] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.969232] ? lock_is_held_type+0x9f/0x120 [ 60.969773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.970378] ? mtree_range_walk+0x632/0x900 [ 60.970931] ? mas_walk+0x5c7/0x7c0 [ 60.971420] do_vmi_munmap+0x1f1/0x2b0 [ 60.971913] mmap_region+0x1f9/0x2660 [ 60.972395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.972908] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.973626] ? __pfx_lock_acquire+0x10/0x10 [ 60.974160] ? __pfx_mmap_region+0x10/0x10 [ 60.974694] ? security_mmap_addr+0x7d/0xa0 [ 60.975227] ? get_unmapped_area+0x1f5/0x3f0 [ 60.975777] do_mmap+0x854/0xf00 [ 60.976219] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.976715] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.977273] ksys_mmap_pgoff+0x3af/0x500 [ 60.977776] do_syscall_64+0x3f/0x90 [ 60.978256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.978901] RIP: 0033:0x7f16d4f78d82 [ 60.979373] 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 [ 60.981489] RSP: 002b:00007fff0d80e018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.982385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16d4f78d82 [ 60.983242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16d43b2000 [ 60.984091] RBP: 00007f16d43b2000 R08: 0000000000000009 R09: 0000000000001000 [ 60.984932] R10: 0000000000000812 R11: 0000000000000206 R12: 000055842f8e8ec0 [ 60.985789] R13: 00007fff0d80e030 R14: 00007fff0d80e060 R15: 00007fff0d80e3c0 [ 60.986643] [ 60.986934] [ 60.987166] Allocated by task 213: [ 60.987605] kasan_save_stack+0x22/0x50 [ 60.988117] kasan_set_track+0x25/0x30 [ 60.988612] __kasan_slab_alloc+0x59/0x70 [ 60.989131] kmem_cache_alloc+0x16b/0x370 [ 60.989644] vm_area_dup+0x20/0x160 [ 60.990101] __split_vma+0x170/0x950 [ 60.990571] split_vma+0xc6/0x110 [ 60.991006] mprotect_fixup+0x8d2/0xb30 [ 60.991512] do_mprotect_pkey+0x87e/0xd40 [ 60.992031] __x64_sys_mprotect+0x78/0xc0 [ 60.992556] do_syscall_64+0x3f/0x90 [ 60.993031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.993674] [ 60.993890] Freed by task 213: [ 60.994277] kasan_save_stack+0x22/0x50 [ 60.994774] kasan_set_track+0x25/0x30 [ 60.995270] kasan_save_free_info+0x2b/0x50 [ 60.995812] __kasan_slab_free+0x10a/0x190 [ 60.996355] kmem_cache_free+0x10d/0x4d0 [ 60.996872] rcu_core+0x8c8/0x2860 [ 60.997384] __do_softirq+0x1b7/0x7d4 [ 60.997876] [ 60.998092] Last potentially related work creation: [ 60.998671] kasan_save_stack+0x22/0x50 [ 60.999182] __kasan_record_aux_stack+0x8e/0xa0 [ 60.999757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.000392] remove_vma+0x139/0x170 [ 61.000845] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.001404] do_vmi_munmap+0x1f1/0x2b0 [ 61.001899] __vm_munmap+0x138/0x3a0 [ 61.002374] __x64_sys_munmap+0x59/0x80 [ 61.002871] do_syscall_64+0x3f/0x90 [ 61.003357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.004003] [ 61.004214] Second to last potentially related work creation: [ 61.004905] kasan_save_stack+0x22/0x50 [ 61.005409] __kasan_record_aux_stack+0x8e/0xa0 [ 61.005996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.006647] remove_vma+0x139/0x170 [ 61.007107] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.007697] do_vmi_munmap+0x1f1/0x2b0 [ 61.008190] mmap_region+0x1f9/0x2660 [ 61.008667] do_mmap+0x854/0xf00 [ 61.009098] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.009588] ksys_mmap_pgoff+0x3af/0x500 [ 61.010089] do_syscall_64+0x3f/0x90 [ 61.010565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.011233] [ 61.011450] The buggy address belongs to the object at ffff88800c8da9f8 [ 61.011450] which belongs to the cache vm_area_struct of size 168 [ 61.012913] The buggy address is located 88 bytes inside of [ 61.012913] freed 168-byte region [ffff88800c8da9f8, ffff88800c8daaa0) [ 61.014317] [ 61.014533] The buggy address belongs to the physical page: [ 61.015204] page:000000000299f290 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc8da [ 61.016274] memcg:ffff88800d6bc601 [ 61.016702] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.017392] page_type: 0xffffffff() [ 61.017836] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 61.018750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6bc601 [ 61.019667] page dumped because: kasan: bad access detected [ 61.020325] [ 61.020540] Memory state around the buggy address: [ 61.021120] ffff88800c8da900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.021974] ffff88800c8da980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 61.022839] >ffff88800c8daa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.023691] ^ [ 61.024392] ffff88800c8daa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 61.025256] ffff88800c8dab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.026101] ================================================================== [ 61.027036] Disabling lock debugging due to kernel taint [ 64.037199] BUG: Bad rss-counter state mm:00000000f40e777d type:MM_FILEPAGES val:33 [ 64.038411] BUG: Bad rss-counter state mm:00000000f40e777d type:MM_ANONPAGES val:22 [ 64.459487] BUG: Bad rss-counter state mm:000000004c55c10d type:MM_FILEPAGES val:33 [ 64.460908] BUG: Bad rss-counter state mm:000000004c55c10d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49110' (ECDSA) to the list of known hosts. 2023/06/20 13:19:36 fuzzer started 2023/06/20 13:19:37 dialing manager at localhost:36067 2023/06/20 13:19:37 checking machine... 2023/06/20 13:19:37 checking revisions... [ 65.199842] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:19:37 testing simple program... [ 65.249959] cgroup: Unknown subsys name 'net' [ 65.304649] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:19:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff110011d5bc5 RSI=0000000000000001 RDI=0000000000000001 RBP=0000607f92e041fc RSP=ffff8880094def28 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=ffff888008eade28 R15=0000607f92e041fc RIP=ffffffff814c0344 RFL=00000202 [-------] 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 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=00007f1d55eaade0 CR3=000000000e19e000 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=39313a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343737 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000040 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000003 RBP=ffff888019707020 RSP=ffff888019706e78 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=ffff8880159ac41c R12=0000000000000001 R13=ffff88800db9bc1c R14=dffffc0000000000 R15=0000000000000003 RIP=ffffffff814c0404 RFL=00000202 [-------] 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 00007f5550deb900 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=00007f5550dca020 CR3=000000001956c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000