syzkaller login: [ 28.859150] BUG: Bad rss-counter state mm:00000000ba9f330d type:MM_FILEPAGES val:33 [ 28.860656] BUG: Bad rss-counter state mm:00000000ba9f330d type:MM_ANONPAGES val:22 [ 29.022183] ================================================================== [ 29.023266] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.024377] Read of size 8 at addr ffff88800e34a310 by task sshd/221 [ 29.025425] [ 29.025680] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.026721] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.027715] Call Trace: [ 29.028032] [ 29.028319] dump_stack_lvl+0x91/0xf0 [ 29.028807] print_report+0xcc/0x620 [ 29.029287] ? __virt_addr_valid+0x102/0x340 [ 29.029849] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.030467] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.031080] kasan_report+0xbe/0xf0 [ 29.031552] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.032178] vma_interval_tree_remove+0xc75/0xec0 [ 29.032780] vma_prepare+0xc54/0x11a0 [ 29.033256] __split_vma+0x5af/0x950 [ 29.033727] ? __pfx___split_vma+0x10/0x10 [ 29.034268] ? find_held_lock+0x2c/0x110 [ 29.034788] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.035351] ? lock_is_held_type+0x9f/0x120 [ 29.035897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.036504] ? mtree_range_walk+0x632/0x900 [ 29.037053] ? mas_walk+0x5c7/0x7c0 [ 29.037535] do_vmi_munmap+0x1f1/0x2b0 [ 29.038048] mmap_region+0x1f9/0x2660 [ 29.038538] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.039053] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.039775] ? __pfx_lock_acquire+0x10/0x10 [ 29.040314] ? __pfx_mmap_region+0x10/0x10 [ 29.040846] ? security_mmap_addr+0x7d/0xa0 [ 29.041375] ? get_unmapped_area+0x1f5/0x3f0 [ 29.041928] do_mmap+0x854/0xf00 [ 29.042369] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.042863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.043419] ksys_mmap_pgoff+0x3af/0x500 [ 29.043922] do_syscall_64+0x3f/0x90 [ 29.044400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.045049] RIP: 0033:0x7fd37ef6bd82 [ 29.045506] 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 [ 29.047644] RSP: 002b:00007ffd2075a4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.048562] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd37ef6bd82 [ 29.049413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd37e3a5000 [ 29.050284] RBP: 00007fd37e3a5000 R08: 0000000000000009 R09: 0000000000001000 [ 29.051129] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c12140ec0 [ 29.051968] R13: 00007ffd2075a510 R14: 00007ffd2075a540 R15: 00007ffd2075a8a0 [ 29.052822] [ 29.053110] [ 29.053323] Allocated by task 214: [ 29.053751] kasan_save_stack+0x22/0x50 [ 29.054277] kasan_set_track+0x25/0x30 [ 29.054768] __kasan_slab_alloc+0x59/0x70 [ 29.055290] kmem_cache_alloc+0x16b/0x370 [ 29.055806] vm_area_dup+0x20/0x160 [ 29.056260] __split_vma+0x170/0x950 [ 29.056726] split_vma+0xc6/0x110 [ 29.057163] mprotect_fixup+0x8d2/0xb30 [ 29.057663] do_mprotect_pkey+0x87e/0xd40 [ 29.058188] __x64_sys_mprotect+0x78/0xc0 [ 29.058706] do_syscall_64+0x3f/0x90 [ 29.059180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.059825] [ 29.060039] Freed by task 214: [ 29.060432] kasan_save_stack+0x22/0x50 [ 29.060936] kasan_set_track+0x25/0x30 [ 29.061430] kasan_save_free_info+0x2b/0x50 [ 29.061967] __kasan_slab_free+0x10a/0x190 [ 29.062500] kmem_cache_free+0x10d/0x4d0 [ 29.063009] rcu_core+0x8c8/0x2860 [ 29.063455] __do_softirq+0x1b7/0x7d4 [ 29.063931] [ 29.064146] Last potentially related work creation: [ 29.064725] kasan_save_stack+0x22/0x50 [ 29.065224] __kasan_record_aux_stack+0x8e/0xa0 [ 29.065792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.066455] remove_vma+0x139/0x170 [ 29.067008] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.067570] do_vmi_munmap+0x1f1/0x2b0 [ 29.068051] __vm_munmap+0x138/0x3a0 [ 29.068524] __x64_sys_munmap+0x59/0x80 [ 29.069020] do_syscall_64+0x3f/0x90 [ 29.069502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.070143] [ 29.070357] Second to last potentially related work creation: [ 29.071037] kasan_save_stack+0x22/0x50 [ 29.071539] __kasan_record_aux_stack+0x8e/0xa0 [ 29.072108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.072746] remove_vma+0x139/0x170 [ 29.073202] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.073762] do_vmi_munmap+0x1f1/0x2b0 [ 29.074248] mmap_region+0x1f9/0x2660 [ 29.074733] do_mmap+0x854/0xf00 [ 29.075159] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.075642] ksys_mmap_pgoff+0x3af/0x500 [ 29.076146] do_syscall_64+0x3f/0x90 [ 29.076621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.077265] [ 29.077483] The buggy address belongs to the object at ffff88800e34a2b8 [ 29.077483] which belongs to the cache vm_area_struct of size 168 [ 29.078968] The buggy address is located 88 bytes inside of [ 29.078968] freed 168-byte region [ffff88800e34a2b8, ffff88800e34a360) [ 29.080369] [ 29.080586] The buggy address belongs to the physical page: [ 29.081248] page:00000000bc5332f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe34a [ 29.082337] memcg:ffff88800dd61f01 [ 29.082768] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.083415] page_type: 0xffffffff() [ 29.083860] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 29.084775] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd61f01 [ 29.085680] page dumped because: kasan: bad access detected [ 29.086369] [ 29.086585] Memory state around the buggy address: [ 29.087172] ffff88800e34a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 29.088021] ffff88800e34a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.088865] >ffff88800e34a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.089712] ^ [ 29.090189] ffff88800e34a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.091052] ffff88800e34a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.091902] ================================================================== [ 29.092948] Disabling lock debugging due to kernel taint [ 31.143985] BUG: Bad rss-counter state mm:00000000a306e491 type:MM_FILEPAGES val:33 [ 31.144884] BUG: Bad rss-counter state mm:00000000a306e491 type:MM_ANONPAGES val:22 [ 31.641629] BUG: Bad rss-counter state mm:00000000897c0ef5 type:MM_FILEPAGES val:33 [ 31.642700] BUG: Bad rss-counter state mm:00000000897c0ef5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40998' (ECDSA) to the list of known hosts. 2023/06/21 04:51:30 fuzzer started 2023/06/21 04:51:30 dialing manager at localhost:36067 2023/06/21 04:51:30 checking machine... 2023/06/21 04:51:30 checking revisions... [ 32.327837] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:51:30 testing simple program... [ 32.369537] cgroup: Unknown subsys name 'net' [ 32.423396] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe5a420ff8 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f77e9dd75100000558b7141a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800dc83680 RBX=ffffffff813ad470 RCX=ffff888016537990 RDX=0000000000000000 RSI=ffff88800dc83680 RDI=ffff8880165378f8 RBP=ffff888016537990 RSP=ffff8880165378f0 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed10019fba72 R11=00000000000b6a61 R12=ffff8880165379c0 R13=0000000000000000 R14=ffff88800dc83680 R15=0000000000092cc0 RIP=ffffffff81132a70 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 00007f2bf4516900 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=00007ffef1c54000 CR3=000000000e5e6000 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=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