syzkaller login: [ 23.970903] BUG: Bad rss-counter state mm:0000000021c883bd type:MM_FILEPAGES val:33 [ 23.972262] BUG: Bad rss-counter state mm:0000000021c883bd type:MM_ANONPAGES val:22 [ 24.012938] ================================================================== [ 24.013897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.015011] Read of size 8 at addr ffff8880099a56b0 by task sshd/219 [ 24.015824] [ 24.016053] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.016993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.018004] Call Trace: [ 24.018350] [ 24.018639] dump_stack_lvl+0x91/0xf0 [ 24.019147] print_report+0xcc/0x620 [ 24.019635] ? __virt_addr_valid+0x102/0x340 [ 24.020192] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.020816] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.021444] kasan_report+0xbe/0xf0 [ 24.021924] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.022564] vma_interval_tree_remove+0xc75/0xec0 [ 24.023185] vma_prepare+0xc54/0x11a0 [ 24.023689] __split_vma+0x5af/0x950 [ 24.024163] ? __pfx___split_vma+0x10/0x10 [ 24.024701] ? find_held_lock+0x2c/0x110 [ 24.025230] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.025805] ? lock_is_held_type+0x9f/0x120 [ 24.026347] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.026989] ? mtree_range_walk+0x632/0x900 [ 24.027553] ? mas_walk+0x5c7/0x7c0 [ 24.028037] do_vmi_munmap+0x1f1/0x2b0 [ 24.028527] mmap_region+0x1f9/0x2660 [ 24.029015] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.029538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.030247] ? __pfx_lock_acquire+0x10/0x10 [ 24.030784] ? __pfx_mmap_region+0x10/0x10 [ 24.031333] ? security_mmap_addr+0x7d/0xa0 [ 24.031872] ? get_unmapped_area+0x1f5/0x3f0 [ 24.032429] do_mmap+0x854/0xf00 [ 24.032868] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.033360] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.033925] ksys_mmap_pgoff+0x3af/0x500 [ 24.034441] do_syscall_64+0x3f/0x90 [ 24.034942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.035596] RIP: 0033:0x7f9f9eeffd82 [ 24.036050] 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 [ 24.038169] RSP: 002b:00007fffb7c88828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.039083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f9eeffd82 [ 24.039934] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f9e339000 [ 24.040785] RBP: 00007f9f9e339000 R08: 0000000000000009 R09: 0000000000001000 [ 24.041639] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555e8b41d90 [ 24.042488] R13: 00007fffb7c88840 R14: 00007fffb7c88870 R15: 00007fffb7c88bd0 [ 24.043378] [ 24.043675] [ 24.043892] Allocated by task 212: [ 24.044330] kasan_save_stack+0x22/0x50 [ 24.044841] kasan_set_track+0x25/0x30 [ 24.045338] __kasan_slab_alloc+0x59/0x70 [ 24.045870] kmem_cache_alloc+0x16b/0x370 [ 24.046394] vm_area_dup+0x20/0x160 [ 24.046849] __split_vma+0x170/0x950 [ 24.047325] split_vma+0xc6/0x110 [ 24.047774] mprotect_fixup+0x8d2/0xb30 [ 24.048287] do_mprotect_pkey+0x87e/0xd40 [ 24.048818] __x64_sys_mprotect+0x78/0xc0 [ 24.049342] do_syscall_64+0x3f/0x90 [ 24.049831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.050475] [ 24.050696] Freed by task 212: [ 24.051124] kasan_save_stack+0x22/0x50 [ 24.051633] kasan_set_track+0x25/0x30 [ 24.052134] kasan_save_free_info+0x2b/0x50 [ 24.052675] __kasan_slab_free+0x10a/0x190 [ 24.053209] kmem_cache_free+0x10d/0x4d0 [ 24.053723] rcu_core+0x8c8/0x2860 [ 24.054173] __do_softirq+0x1b7/0x7d4 [ 24.054665] [ 24.054887] Last potentially related work creation: [ 24.055478] kasan_save_stack+0x22/0x50 [ 24.055989] __kasan_record_aux_stack+0x8e/0xa0 [ 24.056561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.057207] remove_vma+0x139/0x170 [ 24.057667] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.058226] do_vmi_munmap+0x1f1/0x2b0 [ 24.058718] __vm_munmap+0x138/0x3a0 [ 24.059192] __x64_sys_munmap+0x59/0x80 [ 24.059699] do_syscall_64+0x3f/0x90 [ 24.060179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.060830] [ 24.061045] Second to last potentially related work creation: [ 24.061734] kasan_save_stack+0x22/0x50 [ 24.062234] __kasan_record_aux_stack+0x8e/0xa0 [ 24.062819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.063483] remove_vma+0x139/0x170 [ 24.063941] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.064511] do_vmi_munmap+0x1f1/0x2b0 [ 24.064994] mmap_region+0x1f9/0x2660 [ 24.065472] do_mmap+0x854/0xf00 [ 24.065903] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.066396] ksys_mmap_pgoff+0x7d/0x500 [ 24.066894] do_syscall_64+0x3f/0x90 [ 24.067368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.068015] [ 24.068232] The buggy address belongs to the object at ffff8880099a5658 [ 24.068232] which belongs to the cache vm_area_struct of size 168 [ 24.069716] The buggy address is located 88 bytes inside of [ 24.069716] freed 168-byte region [ffff8880099a5658, ffff8880099a5700) [ 24.071163] [ 24.071390] The buggy address belongs to the physical page: [ 24.072049] page:00000000bf4c74b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99a5 [ 24.073141] memcg:ffff888009cd6701 [ 24.073570] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.074267] page_type: 0xffffffff() [ 24.074725] raw: 0100000000000200 ffff8880087a0c80 ffffea0000391600 dead000000000005 [ 24.075653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009cd6701 [ 24.076566] page dumped because: kasan: bad access detected [ 24.077227] [ 24.077450] Memory state around the buggy address: [ 24.078046] ffff8880099a5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.078958] ffff8880099a5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.079838] >ffff8880099a5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.080674] ^ [ 24.081252] ffff8880099a5700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.082102] ffff8880099a5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.082955] ================================================================== [ 24.084034] Disabling lock debugging due to kernel taint [ 26.151443] BUG: Bad rss-counter state mm:00000000bd51707b type:MM_FILEPAGES val:33 [ 26.152595] BUG: Bad rss-counter state mm:00000000bd51707b type:MM_ANONPAGES val:22 [ 26.574596] BUG: Bad rss-counter state mm:000000009bbcd0fd type:MM_FILEPAGES val:33 [ 26.576392] BUG: Bad rss-counter state mm:000000009bbcd0fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22707' (ECDSA) to the list of known hosts. 2023/06/20 11:58:55 fuzzer started 2023/06/20 11:58:56 dialing manager at localhost:36067 2023/06/20 11:58:56 checking machine... 2023/06/20 11:58:56 checking revisions... [ 27.291856] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:58:56 testing simple program... [ 27.346952] cgroup: Unknown subsys name 'net' [ 27.398183] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:58:55 Registers: info registers vcpu 0 RAX=ffff88800fff4000 RBX=0000000000000ac1 RCX=0000000000000000 RDX=1ffff11001ffe80a RSI=ffffffff81b3b92f RDI=ffff88800fff4050 RBP=ffff888018edd670 RSP=ffff888016eb77a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888015ef0110 R14=ffff888018edd1f0 R15=ffff888016eb78d0 RIP=ffffffff81b3b979 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 00007f0907fff700 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=00007f9965c96820 CR3=000000001017e000 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=2035353a38353a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38353a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff836340f7 RBX=ffff8880191ff9a8 RCX=0000000000000001 RDX=1ffff1100323ff40 RSI=ffff8880191ffd90 RDI=ffffffff836340f7 RBP=ffff8880191ffa00 RSP=ffff8880191ff990 R8 =0000000000000001 R9 =ffff8880191ff9e8 R10=0000000000038001 R11=0000000000020c5e R12=ffff8880191ffa70 R13=0000000000000000 R14=ffff88800680d1c0 R15=0000000000000cc0 RIP=ffffffff811303b8 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 00007fc934172900 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=00007fc934729618 CR3=000000001a572000 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