syzkaller login: [ 31.891611] BUG: Bad rss-counter state mm:00000000c6356848 type:MM_FILEPAGES val:33 [ 31.893058] BUG: Bad rss-counter state mm:00000000c6356848 type:MM_ANONPAGES val:22 [ 32.052724] ================================================================== [ 32.053663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.054635] Read of size 8 at addr ffff888019dadd08 by task sshd/220 [ 32.055425] [ 32.055685] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.056881] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.057928] Call Trace: [ 32.058323] [ 32.058672] dump_stack_lvl+0x91/0xf0 [ 32.059160] print_report+0xcc/0x620 [ 32.059659] ? __virt_addr_valid+0x102/0x340 [ 32.060235] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.060882] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.061499] kasan_report+0xbe/0xf0 [ 32.062008] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.062675] vma_interval_tree_remove+0xc75/0xec0 [ 32.063282] vma_prepare+0xc54/0x11a0 [ 32.063787] __split_vma+0x5af/0x950 [ 32.064278] ? __pfx___split_vma+0x10/0x10 [ 32.064801] ? find_held_lock+0x2c/0x110 [ 32.065318] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.065895] ? lock_is_held_type+0x9f/0x120 [ 32.066429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.067047] ? mtree_range_walk+0x632/0x900 [ 32.067597] ? mas_walk+0x5c7/0x7c0 [ 32.068076] do_vmi_munmap+0x1f1/0x2b0 [ 32.068569] mmap_region+0x1f9/0x2660 [ 32.069045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.069566] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.070305] ? __pfx_lock_acquire+0x10/0x10 [ 32.070837] ? __pfx_mmap_region+0x10/0x10 [ 32.071361] ? security_mmap_addr+0x7d/0xa0 [ 32.071885] ? get_unmapped_area+0x1f5/0x3f0 [ 32.072430] do_mmap+0x854/0xf00 [ 32.072878] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.073369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.073935] ksys_mmap_pgoff+0x3af/0x500 [ 32.074441] do_syscall_64+0x3f/0x90 [ 32.074913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.075554] RIP: 0033:0x7f717e47cd82 [ 32.076017] 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 [ 32.078153] RSP: 002b:00007ffea5ce8758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.079056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f717e47cd82 [ 32.079906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f717d8b6000 [ 32.080750] RBP: 00007f717d8b6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.081592] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3b4a3fec0 [ 32.082450] R13: 00007ffea5ce8770 R14: 00007ffea5ce87a0 R15: 00007ffea5ce8b00 [ 32.083301] [ 32.083597] [ 32.083811] Allocated by task 213: [ 32.084241] kasan_save_stack+0x22/0x50 [ 32.084745] kasan_set_track+0x25/0x30 [ 32.085245] __kasan_slab_alloc+0x59/0x70 [ 32.085772] kmem_cache_alloc+0x16b/0x370 [ 32.086295] vm_area_dup+0x20/0x160 [ 32.086744] __split_vma+0x170/0x950 [ 32.087206] split_vma+0xc6/0x110 [ 32.087645] mprotect_fixup+0x8d2/0xb30 [ 32.088164] do_mprotect_pkey+0x87e/0xd40 [ 32.088707] __x64_sys_mprotect+0x78/0xc0 [ 32.089244] do_syscall_64+0x3f/0x90 [ 32.089754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.090417] [ 32.090635] Freed by task 213: [ 32.091039] kasan_save_stack+0x22/0x50 [ 32.091554] kasan_set_track+0x25/0x30 [ 32.092071] kasan_save_free_info+0x2b/0x50 [ 32.092613] __kasan_slab_free+0x10a/0x190 [ 32.093159] kmem_cache_free+0x10d/0x4d0 [ 32.093696] rcu_core+0x8c8/0x2860 [ 32.094160] __do_softirq+0x1b7/0x7d4 [ 32.094640] [ 32.094865] Last potentially related work creation: [ 32.095439] kasan_save_stack+0x22/0x50 [ 32.095933] __kasan_record_aux_stack+0x8e/0xa0 [ 32.096506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.097200] remove_vma+0x139/0x170 [ 32.097645] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.098220] do_vmi_munmap+0x1f1/0x2b0 [ 32.098699] __vm_munmap+0x138/0x3a0 [ 32.099159] __x64_sys_munmap+0x59/0x80 [ 32.099648] do_syscall_64+0x3f/0x90 [ 32.100120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.100752] [ 32.100965] The buggy address belongs to the object at ffff888019dadcb0 [ 32.100965] which belongs to the cache vm_area_struct of size 168 [ 32.102520] The buggy address is located 88 bytes inside of [ 32.102520] freed 168-byte region [ffff888019dadcb0, ffff888019dadd58) [ 32.103967] [ 32.104190] The buggy address belongs to the physical page: [ 32.104878] page:0000000084b9d8d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dad [ 32.106010] memcg:ffff88800dea8501 [ 32.106428] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.107070] page_type: 0xffffffff() [ 32.107523] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.108441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dea8501 [ 32.109355] page dumped because: kasan: bad access detected [ 32.110053] [ 32.110271] Memory state around the buggy address: [ 32.110863] ffff888019dadc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.111708] ffff888019dadc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.112559] >ffff888019dadd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.113403] ^ [ 32.113860] ffff888019dadd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.114706] ffff888019dade00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.115565] ================================================================== [ 32.116488] Disabling lock debugging due to kernel taint [ 34.582279] BUG: Bad rss-counter state mm:00000000f9258c01 type:MM_FILEPAGES val:33 [ 34.583538] BUG: Bad rss-counter state mm:00000000f9258c01 type:MM_ANONPAGES val:22 [ 35.054904] BUG: Bad rss-counter state mm:00000000bd608af3 type:MM_FILEPAGES val:33 [ 35.056097] BUG: Bad rss-counter state mm:00000000bd608af3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40024' (ECDSA) to the list of known hosts. 2023/06/20 03:43:38 fuzzer started 2023/06/20 03:43:38 dialing manager at localhost:44161 2023/06/20 03:43:38 checking machine... 2023/06/20 03:43:38 checking revisions... [ 35.810636] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:43:38 testing simple program... [ 35.862682] cgroup: Unknown subsys name 'net' [ 35.920730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:43:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880088c02f0 RCX=0000000000000000 RDX=1ffffffff09a5d67 RSI=ffffffff818c67d9 RDI=ffffffff84d2eb38 RBP=ffffffff84d2eb00 RSP=ffff88800cb9fcf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880088c03c8 R14=0000000000000000 R15=ffff8880088c0360 RIP=ffffffff814c07e0 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 00007fc45335f900 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=00005634f0ef6954 CR3=000000000eff8000 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=00007f1f5acecb70 CR3=000000000d5a4000 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=2037333a33343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000