syzkaller login: [ 31.634996] BUG: Bad rss-counter state mm:000000007e4f49b8 type:MM_FILEPAGES val:33 [ 31.635681] BUG: Bad rss-counter state mm:000000007e4f49b8 type:MM_ANONPAGES val:22 [ 31.803363] ================================================================== [ 31.804408] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.805431] Read of size 8 at addr ffff88800cc4aa50 by task sshd/220 [ 31.806196] [ 31.806411] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.807269] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.808260] Call Trace: [ 31.808576] [ 31.808866] dump_stack_lvl+0x91/0xf0 [ 31.809362] print_report+0xcc/0x620 [ 31.809845] ? __virt_addr_valid+0x102/0x340 [ 31.810394] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.811013] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.811637] kasan_report+0xbe/0xf0 [ 31.812108] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.812740] vma_interval_tree_remove+0xc75/0xec0 [ 31.813389] vma_prepare+0xc54/0x11a0 [ 31.813854] __split_vma+0x5af/0x950 [ 31.814347] ? __pfx___split_vma+0x10/0x10 [ 31.815004] ? find_held_lock+0x2c/0x110 [ 31.815658] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.816342] ? lock_is_held_type+0x9f/0x120 [ 31.816988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.817731] ? mtree_range_walk+0x632/0x900 [ 31.818398] ? mas_walk+0x5c7/0x7c0 [ 31.818984] do_vmi_munmap+0x1f1/0x2b0 [ 31.819594] mmap_region+0x1f9/0x2660 [ 31.820176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.820792] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.821654] ? __pfx_lock_acquire+0x10/0x10 [ 31.822297] ? __pfx_mmap_region+0x10/0x10 [ 31.822943] ? security_mmap_addr+0x7d/0xa0 [ 31.823612] ? get_unmapped_area+0x1f5/0x3f0 [ 31.824278] do_mmap+0x854/0xf00 [ 31.824806] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.825401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.826075] ksys_mmap_pgoff+0x3af/0x500 [ 31.826690] do_syscall_64+0x3f/0x90 [ 31.827268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.828068] RIP: 0033:0x7f1f97c22d82 [ 31.828628] 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 [ 31.831219] RSP: 002b:00007ffea3474dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.832348] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f97c22d82 [ 31.833385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f9705c000 [ 31.834421] RBP: 00007f1f9705c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.835458] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc50ed5ec0 [ 31.836522] R13: 00007ffea3474df0 R14: 00007ffea3474e20 R15: 00007ffea3475180 [ 31.837558] [ 31.837921] [ 31.838181] Allocated by task 213: [ 31.838704] kasan_save_stack+0x22/0x50 [ 31.839311] kasan_set_track+0x25/0x30 [ 31.839846] __kasan_slab_alloc+0x59/0x70 [ 31.840341] kmem_cache_alloc+0x16b/0x370 [ 31.840825] vm_area_dup+0x20/0x160 [ 31.841256] __split_vma+0x170/0x950 [ 31.841691] split_vma+0xc6/0x110 [ 31.842101] mprotect_fixup+0x8d2/0xb30 [ 31.842571] do_mprotect_pkey+0x87e/0xd40 [ 31.843065] __x64_sys_mprotect+0x78/0xc0 [ 31.843557] do_syscall_64+0x3f/0x90 [ 31.844031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.844634] [ 31.844838] Freed by task 203: [ 31.845207] kasan_save_stack+0x22/0x50 [ 31.845682] kasan_set_track+0x25/0x30 [ 31.846143] kasan_save_free_info+0x2b/0x50 [ 31.846646] __kasan_slab_free+0x10a/0x190 [ 31.847145] kmem_cache_free+0x10d/0x4d0 [ 31.847630] rcu_core+0x8c8/0x2860 [ 31.848047] __do_softirq+0x1b7/0x7d4 [ 31.848494] [ 31.848698] Last potentially related work creation: [ 31.849250] kasan_save_stack+0x22/0x50 [ 31.849722] __kasan_record_aux_stack+0x8e/0xa0 [ 31.850267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.850870] remove_vma+0x139/0x170 [ 31.851299] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.851847] do_vmi_munmap+0x1f1/0x2b0 [ 31.852304] __vm_munmap+0x138/0x3a0 [ 31.852745] __x64_sys_munmap+0x59/0x80 [ 31.853213] do_syscall_64+0x3f/0x90 [ 31.853656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854257] [ 31.854466] The buggy address belongs to the object at ffff88800cc4a9f8 [ 31.854466] which belongs to the cache vm_area_struct of size 168 [ 31.855873] The buggy address is located 88 bytes inside of [ 31.855873] freed 168-byte region [ffff88800cc4a9f8, ffff88800cc4aaa0) [ 31.857189] [ 31.857397] The buggy address belongs to the physical page: [ 31.858015] page:00000000b99b862d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc4a [ 31.859035] memcg:ffff88800fd16801 [ 31.859450] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.860092] page_type: 0xffffffff() [ 31.860542] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.861457] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd16801 [ 31.862356] page dumped because: kasan: bad access detected [ 31.863008] [ 31.863218] Memory state around the buggy address: [ 31.863802] ffff88800cc4a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.864645] ffff88800cc4a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.865497] >ffff88800cc4aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.866339] ^ [ 31.867038] ffff88800cc4aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.867904] ffff88800cc4ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.868730] ================================================================== [ 31.869759] Disabling lock debugging due to kernel taint [ 34.640094] BUG: Bad rss-counter state mm:00000000d2c2fa58 type:MM_FILEPAGES val:33 [ 34.641117] BUG: Bad rss-counter state mm:00000000d2c2fa58 type:MM_ANONPAGES val:22 [ 35.102128] BUG: Bad rss-counter state mm:000000009d0bc6eb type:MM_FILEPAGES val:33 [ 35.103164] BUG: Bad rss-counter state mm:000000009d0bc6eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45426' (ECDSA) to the list of known hosts. 2023/06/19 22:18:48 fuzzer started 2023/06/19 22:18:48 dialing manager at localhost:44161 2023/06/19 22:18:48 checking machine... 2023/06/19 22:18:48 checking revisions... [ 35.830658] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:18:48 testing simple program... [ 35.874201] cgroup: Unknown subsys name 'net' [ 35.927759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:18:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c1357 RSI=ffffffff84506c7f RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000038351 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007f5adda7b900 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=00007f5adda2f01c CR3=0000000018026000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 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=ffff888008c58400 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=00007ffef58ddeb8 CR3=0000000005482000 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=00007f3c5d752510000055a8c1584790 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