syzkaller login: [ 43.976770] BUG: Bad rss-counter state mm:00000000d33fa2cf type:MM_FILEPAGES val:33 [ 43.977933] BUG: Bad rss-counter state mm:00000000d33fa2cf type:MM_ANONPAGES val:22 [ 44.017337] ================================================================== [ 44.018437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.019565] Read of size 8 at addr ffff88801a3f7a50 by task sshd/220 [ 44.020595] [ 44.020830] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.021901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.023097] Call Trace: [ 44.023483] [ 44.023835] dump_stack_lvl+0x91/0xf0 [ 44.024459] print_report+0xcc/0x620 [ 44.024994] ? __virt_addr_valid+0x102/0x340 [ 44.025727] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.026429] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.027095] kasan_report+0xbe/0xf0 [ 44.027608] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.028269] vma_interval_tree_remove+0xc75/0xec0 [ 44.028920] vma_prepare+0xc54/0x11a0 [ 44.029460] __split_vma+0x5af/0x950 [ 44.029970] ? __pfx___split_vma+0x10/0x10 [ 44.030541] ? find_held_lock+0x2c/0x110 [ 44.031100] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.031704] ? lock_is_held_type+0x9f/0x120 [ 44.032285] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.032926] ? mtree_range_walk+0x632/0x900 [ 44.033541] ? mas_walk+0x5c7/0x7c0 [ 44.034047] do_vmi_munmap+0x1f1/0x2b0 [ 44.034577] mmap_region+0x1f9/0x2660 [ 44.035096] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.035643] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.036415] ? __pfx_lock_acquire+0x10/0x10 [ 44.037019] ? __pfx_mmap_region+0x10/0x10 [ 44.037594] ? security_mmap_addr+0x7d/0xa0 [ 44.038163] ? get_unmapped_area+0x1f5/0x3f0 [ 44.038751] do_mmap+0x854/0xf00 [ 44.039220] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.039758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.040359] ksys_mmap_pgoff+0x3af/0x500 [ 44.040908] do_syscall_64+0x3f/0x90 [ 44.041464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.042155] RIP: 0033:0x7f0eae3d2d82 [ 44.042647] 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 [ 44.044997] RSP: 002b:00007ffeb163e448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.046048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0eae3d2d82 [ 44.046981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ead80c000 [ 44.047905] RBP: 00007f0ead80c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.048817] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8a241af70 [ 44.049776] R13: 00007ffeb163e460 R14: 00007ffeb163e490 R15: 00007ffeb163e7f0 [ 44.050739] [ 44.051063] [ 44.051298] Allocated by task 213: [ 44.051785] kasan_save_stack+0x22/0x50 [ 44.052330] kasan_set_track+0x25/0x30 [ 44.052859] __kasan_slab_alloc+0x59/0x70 [ 44.053444] kmem_cache_alloc+0x16b/0x370 [ 44.053998] vm_area_dup+0x20/0x160 [ 44.054494] __split_vma+0x170/0x950 [ 44.055001] split_vma+0xc6/0x110 [ 44.055470] mprotect_fixup+0x8d2/0xb30 [ 44.056021] do_mprotect_pkey+0x87e/0xd40 [ 44.056580] __x64_sys_mprotect+0x78/0xc0 [ 44.057309] do_syscall_64+0x3f/0x90 [ 44.057936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.058716] [ 44.058997] Freed by task 213: [ 44.059469] kasan_save_stack+0x22/0x50 [ 44.060094] kasan_set_track+0x25/0x30 [ 44.060693] kasan_save_free_info+0x2b/0x50 [ 44.061377] __kasan_slab_free+0x10a/0x190 [ 44.062046] kmem_cache_free+0x10d/0x4d0 [ 44.062655] rcu_core+0x8c8/0x2860 [ 44.063270] __do_softirq+0x1b7/0x7d4 [ 44.063843] [ 44.064111] Last potentially related work creation: [ 44.064803] kasan_save_stack+0x22/0x50 [ 44.065443] __kasan_record_aux_stack+0x8e/0xa0 [ 44.066156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.066968] remove_vma+0x139/0x170 [ 44.067540] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.068256] do_vmi_munmap+0x1f1/0x2b0 [ 44.068863] __vm_munmap+0x138/0x3a0 [ 44.069462] __x64_sys_munmap+0x59/0x80 [ 44.070116] do_syscall_64+0x3f/0x90 [ 44.070704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.071515] [ 44.071787] The buggy address belongs to the object at ffff88801a3f79f8 [ 44.071787] which belongs to the cache vm_area_struct of size 168 [ 44.073626] The buggy address is located 88 bytes inside of [ 44.073626] freed 168-byte region [ffff88801a3f79f8, ffff88801a3f7aa0) [ 44.075080] [ 44.075295] The buggy address belongs to the physical page: [ 44.075970] page:0000000002610087 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3f7 [ 44.077082] memcg:ffff888016b91d01 [ 44.077508] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.078184] page_type: 0xffffffff() [ 44.078782] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.080004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b91d01 [ 44.081215] page dumped because: kasan: bad access detected [ 44.082095] [ 44.082379] Memory state around the buggy address: [ 44.083150] ffff88801a3f7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.084055] ffff88801a3f7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 44.084922] >ffff88801a3f7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.085805] ^ [ 44.086507] ffff88801a3f7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 44.087366] ffff88801a3f7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.088226] ================================================================== [ 44.089277] Disabling lock debugging due to kernel taint [ 45.944060] BUG: Bad rss-counter state mm:0000000008c6a365 type:MM_FILEPAGES val:33 [ 45.944817] BUG: Bad rss-counter state mm:0000000008c6a365 type:MM_ANONPAGES val:22 [ 46.402118] BUG: Bad rss-counter state mm:000000009190f01f type:MM_FILEPAGES val:33 [ 46.403552] BUG: Bad rss-counter state mm:000000009190f01f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45383' (ECDSA) to the list of known hosts. 2023/06/19 20:00:15 fuzzer started 2023/06/19 20:00:16 dialing manager at localhost:44161 2023/06/19 20:00:16 checking machine... 2023/06/19 20:00:16 checking revisions... [ 47.143288] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:00:16 testing simple program... [ 47.179955] cgroup: Unknown subsys name 'net' [ 47.212578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:03 Registers: info registers vcpu 0 RAX=00000000000be3fe RBX=0000000000000001 RCX=ffffffff86605df8 RDX=00000000000be3fe RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffff88806ce09af0 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff860723c8 R13=ffffffff85d793d4 R14=ffffffff85d793d4 R15=dffffc0000000000 RIP=ffffffff8112fc46 RFL=00000297 [--S-APC] 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=00007ffe94c87c38 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=00007f96a1452510000055c8ddbed790 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=1ffff1100271eb43 RBX=ffff8880138f59e8 RCX=1ffff11001bb1060 RDX=dffffc0000000000 RSI=ffff88800e2d6c10 RDI=ffff8880138f5a18 RBP=ffff88800e43e538 RSP=ffff8880168dfc08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e2d6c00 R13=0000000000000000 R14=ffff8880099f8898 R15=ffff8880099f8850 RIP=ffffffff818474fe RFL=00000046 [---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 00007ff4b4a4a900 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=00007ff4b50020b0 CR3=000000000ec40000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000