syzkaller login: [ 45.322383] BUG: Bad rss-counter state mm:00000000fde8a840 type:MM_FILEPAGES val:33 [ 45.324517] BUG: Bad rss-counter state mm:00000000fde8a840 type:MM_ANONPAGES val:22 [ 45.494934] ================================================================== [ 45.495911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.496921] Read of size 8 at addr ffff888016cb1228 by task sshd/221 [ 45.497839] [ 45.498080] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.499041] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.500086] Call Trace: [ 45.500425] [ 45.500725] dump_stack_lvl+0x91/0xf0 [ 45.501258] print_report+0xcc/0x620 [ 45.501779] ? __virt_addr_valid+0x102/0x340 [ 45.502398] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.503064] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.503724] kasan_report+0xbe/0xf0 [ 45.504266] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.504941] vma_interval_tree_remove+0xc75/0xec0 [ 45.505581] vma_prepare+0xc54/0x11a0 [ 45.506110] __split_vma+0x5af/0x950 [ 45.506630] ? __pfx___split_vma+0x10/0x10 [ 45.507204] ? find_held_lock+0x2c/0x110 [ 45.507759] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.508378] ? lock_is_held_type+0x9f/0x120 [ 45.508971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.509620] ? mtree_range_walk+0x632/0x900 [ 45.510236] ? mas_walk+0x5c7/0x7c0 [ 45.510747] do_vmi_munmap+0x1f1/0x2b0 [ 45.511281] mmap_region+0x1f9/0x2660 [ 45.511806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.512352] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.513127] ? __pfx_lock_acquire+0x10/0x10 [ 45.513702] ? __pfx_mmap_region+0x10/0x10 [ 45.514317] ? security_mmap_addr+0x7d/0xa0 [ 45.514914] ? get_unmapped_area+0x1f5/0x3f0 [ 45.515510] do_mmap+0x854/0xf00 [ 45.515986] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.516514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.517123] ksys_mmap_pgoff+0x3af/0x500 [ 45.517661] do_syscall_64+0x3f/0x90 [ 45.518201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.518911] RIP: 0033:0x7f5acfca9d82 [ 45.519395] 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 [ 45.521664] RSP: 002b:00007ffdbbb1c7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.522668] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5acfca9d82 [ 45.523602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5acf0e3000 [ 45.524518] RBP: 00007f5acf0e3000 R08: 0000000000000009 R09: 0000000000001000 [ 45.525431] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558df7651d90 [ 45.526353] R13: 00007ffdbbb1c800 R14: 00007ffdbbb1c830 R15: 00007ffdbbb1cb90 [ 45.527276] [ 45.527585] [ 45.527828] Allocated by task 214: [ 45.528295] kasan_save_stack+0x22/0x50 [ 45.528847] kasan_set_track+0x25/0x30 [ 45.529373] __kasan_slab_alloc+0x59/0x70 [ 45.529942] kmem_cache_alloc+0x16b/0x370 [ 45.530515] vm_area_dup+0x20/0x160 [ 45.531014] __split_vma+0x170/0x950 [ 45.531512] split_vma+0xc6/0x110 [ 45.532000] mprotect_fixup+0x8d2/0xb30 [ 45.532537] do_mprotect_pkey+0x87e/0xd40 [ 45.533102] __x64_sys_mprotect+0x78/0xc0 [ 45.533656] do_syscall_64+0x3f/0x90 [ 45.534168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.534873] [ 45.535101] Freed by task 214: [ 45.535516] kasan_save_stack+0x22/0x50 [ 45.536082] kasan_set_track+0x25/0x30 [ 45.536608] kasan_save_free_info+0x2b/0x50 [ 45.537187] __kasan_slab_free+0x10a/0x190 [ 45.537756] kmem_cache_free+0x10d/0x4d0 [ 45.538329] rcu_core+0x8c8/0x2860 [ 45.538810] __do_softirq+0x1b7/0x7d4 [ 45.539315] [ 45.539545] Last potentially related work creation: [ 45.540183] kasan_save_stack+0x22/0x50 [ 45.540722] __kasan_record_aux_stack+0x8e/0xa0 [ 45.541339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.542032] remove_vma+0x139/0x170 [ 45.542536] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.543139] do_vmi_munmap+0x1f1/0x2b0 [ 45.543657] __vm_munmap+0x138/0x3a0 [ 45.544177] __x64_sys_munmap+0x59/0x80 [ 45.544708] do_syscall_64+0x3f/0x90 [ 45.545225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.545923] [ 45.546155] The buggy address belongs to the object at ffff888016cb11d0 [ 45.546155] which belongs to the cache vm_area_struct of size 168 [ 45.547741] The buggy address is located 88 bytes inside of [ 45.547741] freed 168-byte region [ffff888016cb11d0, ffff888016cb1278) [ 45.549310] [ 45.549546] The buggy address belongs to the physical page: [ 45.550278] page:00000000027f619b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cb1 [ 45.551456] memcg:ffff88800b348f01 [ 45.551936] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.552626] page_type: 0xffffffff() [ 45.553128] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.554120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b348f01 [ 45.555109] page dumped because: kasan: bad access detected [ 45.555839] [ 45.556079] Memory state around the buggy address: [ 45.556696] ffff888016cb1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.557610] ffff888016cb1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 45.558552] >ffff888016cb1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 45.559468] ^ [ 45.560090] ffff888016cb1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 45.561028] ffff888016cb1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 45.561947] ================================================================== [ 45.563466] Disabling lock debugging due to kernel taint [ 47.530510] BUG: Bad rss-counter state mm:000000003baafe78 type:MM_FILEPAGES val:33 [ 47.531623] BUG: Bad rss-counter state mm:000000003baafe78 type:MM_ANONPAGES val:22 [ 48.060357] BUG: Bad rss-counter state mm:000000001add2de0 type:MM_FILEPAGES val:33 [ 48.061587] BUG: Bad rss-counter state mm:000000001add2de0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56342' (ECDSA) to the list of known hosts. 2023/06/19 13:18:17 fuzzer started 2023/06/19 13:18:17 dialing manager at localhost:44161 2023/06/19 13:18:17 checking machine... 2023/06/19 13:18:17 checking revisions... [ 48.786562] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:18:17 testing simple program... [ 48.834059] cgroup: Unknown subsys name 'net' [ 48.884470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:18:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008dc9180 RCX=0000000000000000 RDX=1ffff1100328dfc1 RSI=ffffffff81ecbf9f RDI=ffff88801946fe08 RBP=ffff88801946fdf8 RSP=ffff88801946fad8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffffffff857def60 R14=ffff88801946fe60 R15=ffff88801946fdf8 RIP=ffffffff814c07e0 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 00007efc8a90d900 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=00007efc8a8c101c CR3=000000000cc84000 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=00000000dead4ead RBX=ffff88801699a1d0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801699a1d4 RBP=1ffff110028eef39 RSP=ffff8880147779c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=00007ffd49ac07a4 R13=1ffff110028eef52 R14=ffff88801699a1d0 R15=dffffc0000000000 RIP=ffffffff812e004a 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 00007fb69837a900 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=00007fb697806140 CR3=000000000c712000 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=b66f587ec4db028ff84e1f238a39698b XMM02=eff9b2d0a8fce9cb000000000011cf28 XMM03=2c67c8bc2e329bc3000000000011d050 XMM04=f0f3b346171e497200000000000ae988 XMM05=0efa21c618b8f5e90000000000135168 XMM06=c291bd5c70af25b90000000000133f58 XMM07=fb795ef6d657705600000000001244d8 XMM08=2c67c8bc2e329bc3000000000011d050 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000