syzkaller login: [ 38.850756] BUG: Bad rss-counter state mm:000000001fd16f34 type:MM_FILEPAGES val:33 [ 38.852471] BUG: Bad rss-counter state mm:000000001fd16f34 type:MM_ANONPAGES val:22 [ 39.024511] ================================================================== [ 39.025663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.027007] Read of size 8 at addr ffff88800e00a6b0 by task sshd/219 [ 39.027833] [ 39.028060] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.028988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.030036] Call Trace: [ 39.030381] [ 39.030696] dump_stack_lvl+0x91/0xf0 [ 39.031226] print_report+0xcc/0x620 [ 39.031749] ? __virt_addr_valid+0x102/0x340 [ 39.032345] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.033007] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.033671] kasan_report+0xbe/0xf0 [ 39.034186] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.034903] vma_interval_tree_remove+0xc75/0xec0 [ 39.035579] vma_prepare+0xc54/0x11a0 [ 39.036116] __split_vma+0x5af/0x950 [ 39.036647] ? __pfx___split_vma+0x10/0x10 [ 39.037242] ? find_held_lock+0x2c/0x110 [ 39.037827] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.038462] ? lock_is_held_type+0x9f/0x120 [ 39.039074] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.039752] ? mtree_range_walk+0x632/0x900 [ 39.040366] ? mas_walk+0x5c7/0x7c0 [ 39.040894] do_vmi_munmap+0x1f1/0x2b0 [ 39.041452] mmap_region+0x1f9/0x2660 [ 39.042000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.042582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.043411] ? __pfx_lock_acquire+0x10/0x10 [ 39.044023] ? __pfx_mmap_region+0x10/0x10 [ 39.044624] ? security_mmap_addr+0x7d/0xa0 [ 39.045227] ? get_unmapped_area+0x1f5/0x3f0 [ 39.045850] do_mmap+0x854/0xf00 [ 39.046346] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.046915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.047547] ksys_mmap_pgoff+0x3af/0x500 [ 39.048124] do_syscall_64+0x3f/0x90 [ 39.048664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.049392] RIP: 0033:0x7fc13081ad82 [ 39.049922] 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 [ 39.052369] RSP: 002b:00007ffc6c30d728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.053404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc13081ad82 [ 39.054369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc12fc54000 [ 39.055365] RBP: 00007fc12fc54000 R08: 0000000000000009 R09: 0000000000001000 [ 39.056343] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f0c98db20 [ 39.057336] R13: 00007ffc6c30d740 R14: 00007ffc6c30d770 R15: 00007ffc6c30dad0 [ 39.058338] [ 39.058683] [ 39.058932] Allocated by task 212: [ 39.059429] kasan_save_stack+0x22/0x50 [ 39.060012] kasan_set_track+0x25/0x30 [ 39.060581] __kasan_slab_alloc+0x59/0x70 [ 39.061191] kmem_cache_alloc+0x16b/0x370 [ 39.061793] vm_area_dup+0x20/0x160 [ 39.062324] __split_vma+0x170/0x950 [ 39.062879] split_vma+0xc6/0x110 [ 39.063387] mprotect_fixup+0x8d2/0xb30 [ 39.063972] do_mprotect_pkey+0x87e/0xd40 [ 39.064572] __x64_sys_mprotect+0x78/0xc0 [ 39.065160] do_syscall_64+0x3f/0x90 [ 39.065692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.066414] [ 39.066654] Freed by task 212: [ 39.067109] kasan_save_stack+0x22/0x50 [ 39.067682] kasan_set_track+0x25/0x30 [ 39.068238] kasan_save_free_info+0x2b/0x50 [ 39.068832] __kasan_slab_free+0x10a/0x190 [ 39.069438] kmem_cache_free+0x10d/0x4d0 [ 39.070015] rcu_core+0x8c8/0x2860 [ 39.070528] __do_softirq+0x1b7/0x7d4 [ 39.071077] [ 39.071318] Last potentially related work creation: [ 39.071980] kasan_save_stack+0x22/0x50 [ 39.072554] __kasan_record_aux_stack+0x8e/0xa0 [ 39.073203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.073937] remove_vma+0x139/0x170 [ 39.074451] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.075090] do_vmi_munmap+0x1f1/0x2b0 [ 39.075649] __vm_munmap+0x138/0x3a0 [ 39.076190] __x64_sys_munmap+0x59/0x80 [ 39.076766] do_syscall_64+0x3f/0x90 [ 39.077305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.078041] [ 39.078290] Second to last potentially related work creation: [ 39.079084] kasan_save_stack+0x22/0x50 [ 39.079664] __kasan_record_aux_stack+0x8e/0xa0 [ 39.080321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.081055] remove_vma+0x139/0x170 [ 39.081569] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.082220] do_vmi_munmap+0x1f1/0x2b0 [ 39.082815] __vm_munmap+0x138/0x3a0 [ 39.083357] elf_map+0x26f/0x310 [ 39.083871] load_elf_binary+0x3417/0x5030 [ 39.084494] bprm_execve+0x803/0x1940 [ 39.085038] do_execveat_common+0x734/0x8e0 [ 39.085648] __x64_sys_execve+0x93/0xc0 [ 39.086216] do_syscall_64+0x3f/0x90 [ 39.086778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.087541] [ 39.087793] The buggy address belongs to the object at ffff88800e00a658 [ 39.087793] which belongs to the cache vm_area_struct of size 168 [ 39.089517] The buggy address is located 88 bytes inside of [ 39.089517] freed 168-byte region [ffff88800e00a658, ffff88800e00a700) [ 39.091169] [ 39.091427] The buggy address belongs to the physical page: [ 39.092195] page:000000009d16ab9e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe00a [ 39.093480] memcg:ffff88800ed33901 [ 39.093992] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.094848] page_type: 0xffffffff() [ 39.095387] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.096497] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed33901 [ 39.097591] page dumped because: kasan: bad access detected [ 39.098383] [ 39.098641] Memory state around the buggy address: [ 39.099350] ffff88800e00a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.100373] ffff88800e00a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.101406] >ffff88800e00a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.102445] ^ [ 39.103165] ffff88800e00a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 39.104204] ffff88800e00a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.105234] ================================================================== [ 39.106412] Disabling lock debugging due to kernel taint [ 41.030265] BUG: Bad rss-counter state mm:0000000046d7f2b4 type:MM_FILEPAGES val:33 [ 41.031807] BUG: Bad rss-counter state mm:0000000046d7f2b4 type:MM_ANONPAGES val:22 [ 41.573735] BUG: Bad rss-counter state mm:000000001de22a1c type:MM_FILEPAGES val:33 [ 41.574956] BUG: Bad rss-counter state mm:000000001de22a1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56096' (ECDSA) to the list of known hosts. 2023/06/19 13:11:12 fuzzer started 2023/06/19 13:11:13 dialing manager at localhost:44161 2023/06/19 13:11:13 checking machine... 2023/06/19 13:11:13 checking revisions... [ 42.279393] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:11:13 testing simple program... [ 42.332411] cgroup: Unknown subsys name 'net' [ 42.371604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:11:12 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=00007ffd364f2858 CR3=000000000e8b0000 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=2032313a31313a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a31313a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801589f258 RCX=0000000000000001 RDX=1ffff11002b13e4d RSI=ffff88801589f5b0 RDI=ffff88801589f268 RBP=ffff88801589f5b0 RSP=ffff88801589f1b0 R8 =ffffffff86137542 R9 =ffff88801589f298 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000008 R13=ffff888015898000 R14=ffff88801589f5b8 R15=ffff88801589f258 RIP=ffffffff81130468 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 00007f484f0cb900 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=00007f484f682618 CR3=0000000016998000 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