syzkaller login: [ 28.781453] BUG: Bad rss-counter state mm:000000008b524a16 type:MM_FILEPAGES val:33 [ 28.782642] BUG: Bad rss-counter state mm:000000008b524a16 type:MM_ANONPAGES val:22 [ 28.821303] ================================================================== [ 28.822446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.823636] Read of size 8 at addr ffff88800d857880 by task sshd/220 [ 28.824627] [ 28.824834] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.825648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.826572] Call Trace: [ 28.826873] [ 28.827144] dump_stack_lvl+0x91/0xf0 [ 28.827609] print_report+0xcc/0x620 [ 28.828077] ? __virt_addr_valid+0x102/0x340 [ 28.828598] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.829176] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.829753] kasan_report+0xbe/0xf0 [ 28.830204] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.830790] vma_interval_tree_remove+0xc75/0xec0 [ 28.831353] vma_prepare+0xc54/0x11a0 [ 28.831807] __split_vma+0x5af/0x950 [ 28.832271] ? __pfx___split_vma+0x10/0x10 [ 28.832770] ? find_held_lock+0x2c/0x110 [ 28.833262] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.833792] ? lock_is_held_type+0x9f/0x120 [ 28.834303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.834867] ? mtree_range_walk+0x632/0x900 [ 28.835387] ? mas_walk+0x5c7/0x7c0 [ 28.835835] do_vmi_munmap+0x1f1/0x2b0 [ 28.836322] mmap_region+0x1f9/0x2660 [ 28.836775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.837259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.837928] ? __pfx_lock_acquire+0x10/0x10 [ 28.838426] ? __pfx_mmap_region+0x10/0x10 [ 28.838921] ? security_mmap_addr+0x7d/0xa0 [ 28.839420] ? get_unmapped_area+0x1f5/0x3f0 [ 28.839968] do_mmap+0x854/0xf00 [ 28.840383] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.840854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.841381] ksys_mmap_pgoff+0x3af/0x500 [ 28.841864] do_syscall_64+0x3f/0x90 [ 28.842315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.842923] RIP: 0033:0x7fdf9f204d82 [ 28.843354] 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 [ 28.845367] RSP: 002b:00007ffc10c91f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.846212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf9f204d82 [ 28.847003] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf9e63e000 [ 28.847798] RBP: 00007fdf9e63e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.848595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559dd7bd2ec0 [ 28.849384] R13: 00007ffc10c91f60 R14: 00007ffc10c91f90 R15: 00007ffc10c922f0 [ 28.850185] [ 28.850459] [ 28.850664] Allocated by task 213: [ 28.851066] kasan_save_stack+0x22/0x50 [ 28.851545] kasan_set_track+0x25/0x30 [ 28.852017] __kasan_slab_alloc+0x59/0x70 [ 28.852546] kmem_cache_alloc+0x16b/0x370 [ 28.853051] vm_area_dup+0x20/0x160 [ 28.853494] __split_vma+0x170/0x950 [ 28.853956] split_vma+0xc6/0x110 [ 28.854396] mprotect_fixup+0x8d2/0xb30 [ 28.854898] do_mprotect_pkey+0x87e/0xd40 [ 28.855425] __x64_sys_mprotect+0x78/0xc0 [ 28.855970] do_syscall_64+0x3f/0x90 [ 28.856445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.857098] [ 28.857325] Freed by task 213: [ 28.857718] kasan_save_stack+0x22/0x50 [ 28.858223] kasan_set_track+0x25/0x30 [ 28.858711] kasan_save_free_info+0x2b/0x50 [ 28.859242] __kasan_slab_free+0x10a/0x190 [ 28.859780] kmem_cache_free+0x10d/0x4d0 [ 28.860291] rcu_core+0x8c8/0x2860 [ 28.860799] __do_softirq+0x1b7/0x7d4 [ 28.861369] [ 28.861633] Last potentially related work creation: [ 28.862344] kasan_save_stack+0x22/0x50 [ 28.862957] __kasan_record_aux_stack+0x8e/0xa0 [ 28.863665] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.864478] remove_vma+0x139/0x170 [ 28.865065] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.865759] do_vmi_munmap+0x1f1/0x2b0 [ 28.866350] __vm_munmap+0x138/0x3a0 [ 28.866912] __x64_sys_munmap+0x59/0x80 [ 28.867507] do_syscall_64+0x3f/0x90 [ 28.868103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.868886] [ 28.869150] The buggy address belongs to the object at ffff88800d857828 [ 28.869150] which belongs to the cache vm_area_struct of size 168 [ 28.870764] The buggy address is located 88 bytes inside of [ 28.870764] freed 168-byte region [ffff88800d857828, ffff88800d8578d0) [ 28.872112] [ 28.872317] The buggy address belongs to the physical page: [ 28.872929] page:000000003842f107 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd857 [ 28.873940] memcg:ffff888013f27301 [ 28.874345] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.874950] page_type: 0xffffffff() [ 28.875372] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.876240] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f27301 [ 28.877086] page dumped because: kasan: bad access detected [ 28.877707] [ 28.877912] Memory state around the buggy address: [ 28.878456] ffff88800d857780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.879257] ffff88800d857800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.880071] >ffff88800d857880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.880861] ^ [ 28.881253] ffff88800d857900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.882049] ffff88800d857980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.882847] ================================================================== [ 28.883757] Disabling lock debugging due to kernel taint [ 30.458705] BUG: Bad rss-counter state mm:00000000a299f823 type:MM_FILEPAGES val:33 [ 30.459759] BUG: Bad rss-counter state mm:00000000a299f823 type:MM_ANONPAGES val:22 [ 30.883048] BUG: Bad rss-counter state mm:0000000084102f1f type:MM_FILEPAGES val:33 [ 30.884620] BUG: Bad rss-counter state mm:0000000084102f1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40035' (ECDSA) to the list of known hosts. 2023/06/20 23:28:07 fuzzer started 2023/06/20 23:28:07 dialing manager at localhost:36067 2023/06/20 23:28:07 checking machine... 2023/06/20 23:28:07 checking revisions... [ 31.615095] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:28:07 testing simple program... [ 31.663244] cgroup: Unknown subsys name 'net' [ 31.699025] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:07 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8162f785 RDX=ffff888018873680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff8880166afb40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=4920230a2e445342 R12=0000000000000001 R13=ffff8880166afc00 R14=ffff8880166afe00 R15=dffffc0000000000 RIP=ffffffff814c086b 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 00007fa26dec2900 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=00007ffc456af000 CR3=00000000102c8000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f3fc7ff7008 CR3=0000000015b10000 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=2036303a38323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a38323a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000