syzkaller login: [ 37.325360] BUG: Bad rss-counter state mm:00000000e7470893 type:MM_FILEPAGES val:33 [ 37.326284] BUG: Bad rss-counter state mm:00000000e7470893 type:MM_ANONPAGES val:22 [ 37.473934] ================================================================== [ 37.475109] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.476339] Read of size 8 at addr ffff8880166a4798 by task sshd/221 [ 37.477298] [ 37.477570] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.478649] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.479880] Call Trace: [ 37.480279] [ 37.480585] dump_stack_lvl+0x91/0xf0 [ 37.481071] print_report+0xcc/0x620 [ 37.481552] ? __virt_addr_valid+0x102/0x340 [ 37.482096] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.482699] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.483344] kasan_report+0xbe/0xf0 [ 37.483936] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.484712] vma_interval_tree_remove+0xc75/0xec0 [ 37.485472] vma_prepare+0xc54/0x11a0 [ 37.486072] __split_vma+0x5af/0x950 [ 37.486666] ? __pfx___split_vma+0x10/0x10 [ 37.487335] ? find_held_lock+0x2c/0x110 [ 37.487984] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.488688] ? lock_is_held_type+0x9f/0x120 [ 37.489362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.490122] ? mtree_range_walk+0x632/0x900 [ 37.490819] ? mas_walk+0x5c7/0x7c0 [ 37.491410] do_vmi_munmap+0x1f1/0x2b0 [ 37.492029] mmap_region+0x1f9/0x2660 [ 37.492634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.493272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.494164] ? __pfx_lock_acquire+0x10/0x10 [ 37.494854] ? __pfx_mmap_region+0x10/0x10 [ 37.495524] ? security_mmap_addr+0x7d/0xa0 [ 37.496190] ? get_unmapped_area+0x1f5/0x3f0 [ 37.496874] do_mmap+0x854/0xf00 [ 37.497425] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.498047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.498747] ksys_mmap_pgoff+0x3af/0x500 [ 37.499395] do_syscall_64+0x3f/0x90 [ 37.499990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.500806] RIP: 0033:0x7f161405bd82 [ 37.501379] 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 [ 37.504070] RSP: 002b:00007ffefa9718c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.505198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f161405bd82 [ 37.506256] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1613495000 [ 37.507335] RBP: 00007f1613495000 R08: 0000000000000009 R09: 0000000000001000 [ 37.508394] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556980c61ec0 [ 37.509451] R13: 00007ffefa9718e0 R14: 00007ffefa971910 R15: 00007ffefa971c70 [ 37.510523] [ 37.510905] [ 37.511170] Allocated by task 213: [ 37.511703] kasan_save_stack+0x22/0x50 [ 37.512330] kasan_set_track+0x25/0x30 [ 37.512945] __kasan_slab_alloc+0x59/0x70 [ 37.513596] kmem_cache_alloc+0x16b/0x370 [ 37.514238] vm_area_dup+0x20/0x160 [ 37.514822] __split_vma+0x170/0x950 [ 37.515401] split_vma+0xc6/0x110 [ 37.515945] mprotect_fixup+0x8d2/0xb30 [ 37.516573] do_mprotect_pkey+0x87e/0xd40 [ 37.517232] __x64_sys_mprotect+0x78/0xc0 [ 37.517918] do_syscall_64+0x3f/0x90 [ 37.518511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.519321] [ 37.519589] Freed by task 213: [ 37.520081] kasan_save_stack+0x22/0x50 [ 37.520705] kasan_set_track+0x25/0x30 [ 37.521321] kasan_save_free_info+0x2b/0x50 [ 37.521991] __kasan_slab_free+0x10a/0x190 [ 37.522658] kmem_cache_free+0x10d/0x4d0 [ 37.523307] rcu_core+0x8c8/0x2860 [ 37.523859] __do_softirq+0x1b7/0x7d4 [ 37.524457] [ 37.524725] Last potentially related work creation: [ 37.525460] kasan_save_stack+0x22/0x50 [ 37.526088] __kasan_record_aux_stack+0x8e/0xa0 [ 37.526824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.527628] remove_vma+0x139/0x170 [ 37.528201] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.528898] do_vmi_munmap+0x1f1/0x2b0 [ 37.529500] __vm_munmap+0x138/0x3a0 [ 37.530084] __x64_sys_munmap+0x59/0x80 [ 37.530703] do_syscall_64+0x3f/0x90 [ 37.531310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.532110] [ 37.532377] The buggy address belongs to the object at ffff8880166a4740 [ 37.532377] which belongs to the cache vm_area_struct of size 168 [ 37.534213] The buggy address is located 88 bytes inside of [ 37.534213] freed 168-byte region [ffff8880166a4740, ffff8880166a47e8) [ 37.535980] [ 37.536247] The buggy address belongs to the physical page: [ 37.537075] page:00000000824e01b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166a4 [ 37.538444] memcg:ffff88800f21e901 [ 37.539003] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.539806] page_type: 0xffffffff() [ 37.540367] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.541513] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f21e901 [ 37.542642] page dumped because: kasan: bad access detected [ 37.543474] [ 37.543743] Memory state around the buggy address: [ 37.544470] ffff8880166a4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.545542] ffff8880166a4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.546607] >ffff8880166a4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.547675] ^ [ 37.548292] ffff8880166a4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.549353] ffff8880166a4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.550413] ================================================================== [ 37.551741] Disabling lock debugging due to kernel taint [ 39.760232] BUG: Bad rss-counter state mm:000000006ff01e26 type:MM_FILEPAGES val:33 [ 39.761346] BUG: Bad rss-counter state mm:000000006ff01e26 type:MM_ANONPAGES val:22 [ 40.336389] BUG: Bad rss-counter state mm:00000000ad019562 type:MM_FILEPAGES val:33 [ 40.337540] BUG: Bad rss-counter state mm:00000000ad019562 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39732' (ECDSA) to the list of known hosts. 2023/06/20 00:17:53 fuzzer started 2023/06/20 00:17:53 dialing manager at localhost:44161 2023/06/20 00:17:53 checking machine... 2023/06/20 00:17:53 checking revisions... [ 41.057354] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:17:54 testing simple program... [ 41.115209] cgroup: Unknown subsys name 'net' [ 41.182857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:17:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e58 RDI=ffffffff813782a8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018169b40 R15=ffff888019f4c000 RIP=ffffffff811303b2 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 00007fec92a9f900 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=00007ffdb8161000 CR3=000000000ebfc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fc9bafa2d00 CR3=000000000d6ce000 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=2033353a37313a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37313a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000