syzkaller login: [ 31.030448] BUG: Bad rss-counter state mm:000000004dad6012 type:MM_FILEPAGES val:33 [ 31.031553] BUG: Bad rss-counter state mm:000000004dad6012 type:MM_ANONPAGES val:22 [ 31.200591] ================================================================== [ 31.201827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.203296] Read of size 8 at addr ffff88800c4da880 by task sshd/220 [ 31.204173] [ 31.204420] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.205404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.206509] Call Trace: [ 31.206873] <TASK> [ 31.207210] dump_stack_lvl+0x91/0xf0 [ 31.207778] print_report+0xcc/0x620 [ 31.208338] ? __virt_addr_valid+0x102/0x340 [ 31.208969] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209679] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210383] kasan_report+0xbe/0xf0 [ 31.210971] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211708] vma_interval_tree_remove+0xc75/0xec0 [ 31.212418] vma_prepare+0xc54/0x11a0 [ 31.212988] __split_vma+0x5af/0x950 [ 31.213543] ? __pfx___split_vma+0x10/0x10 [ 31.214160] ? find_held_lock+0x2c/0x110 [ 31.214764] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.215425] ? lock_is_held_type+0x9f/0x120 [ 31.216054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.216755] ? mtree_range_walk+0x632/0x900 [ 31.217401] ? mas_walk+0x5c7/0x7c0 [ 31.217960] do_vmi_munmap+0x1f1/0x2b0 [ 31.218536] mmap_region+0x1f9/0x2660 [ 31.219101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.219702] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.220527] ? __pfx_lock_acquire+0x10/0x10 [ 31.221147] ? __pfx_mmap_region+0x10/0x10 [ 31.221761] ? security_mmap_addr+0x7d/0xa0 [ 31.222376] ? get_unmapped_area+0x1f5/0x3f0 [ 31.223020] do_mmap+0x854/0xf00 [ 31.223537] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.224113] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.224766] ksys_mmap_pgoff+0x3af/0x500 [ 31.225358] do_syscall_64+0x3f/0x90 [ 31.225914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226673] RIP: 0033:0x7f0ecfd76d82 [ 31.227227] 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 [ 31.229698] RSP: 002b:00007fff17468748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.230740] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ecfd76d82 [ 31.231724] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ecf1b0000 [ 31.232700] RBP: 00007f0ecf1b0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.233669] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563a80f6b20 [ 31.234645] R13: 00007fff17468760 R14: 00007fff17468790 R15: 00007fff17468af0 [ 31.235630] </TASK> [ 31.235969] [ 31.236218] Allocated by task 213: [ 31.236708] kasan_save_stack+0x22/0x50 [ 31.237288] kasan_set_track+0x25/0x30 [ 31.237854] __kasan_slab_alloc+0x59/0x70 [ 31.238465] kmem_cache_alloc+0x16b/0x370 [ 31.239081] vm_area_dup+0x20/0x160 [ 31.239607] __split_vma+0x170/0x950 [ 31.240145] split_vma+0xc6/0x110 [ 31.240653] mprotect_fixup+0x8d2/0xb30 [ 31.241233] do_mprotect_pkey+0x87e/0xd40 [ 31.241833] __x64_sys_mprotect+0x78/0xc0 [ 31.242438] do_syscall_64+0x3f/0x90 [ 31.242987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243786] [ 31.244044] Freed by task 213: [ 31.244491] kasan_save_stack+0x22/0x50 [ 31.245066] kasan_set_track+0x25/0x30 [ 31.245628] kasan_save_free_info+0x2b/0x50 [ 31.246238] __kasan_slab_free+0x10a/0x190 [ 31.246849] kmem_cache_free+0x10d/0x4d0 [ 31.247458] rcu_core+0x8c8/0x2860 [ 31.247963] __do_softirq+0x1b7/0x7d4 [ 31.248506] [ 31.248751] Last potentially related work creation: [ 31.249424] kasan_save_stack+0x22/0x50 [ 31.250000] __kasan_record_aux_stack+0x8e/0xa0 [ 31.250657] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.251396] remove_vma+0x139/0x170 [ 31.251909] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.252543] do_vmi_munmap+0x1f1/0x2b0 [ 31.253099] __vm_munmap+0x138/0x3a0 [ 31.253636] __x64_sys_munmap+0x59/0x80 [ 31.254201] do_syscall_64+0x3f/0x90 [ 31.254745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255470] [ 31.255717] Second to last potentially related work creation: [ 31.256496] kasan_save_stack+0x22/0x50 [ 31.257070] __kasan_record_aux_stack+0x8e/0xa0 [ 31.257728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.258456] remove_vma+0x139/0x170 [ 31.258980] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.259611] do_vmi_munmap+0x1f1/0x2b0 [ 31.260163] mmap_region+0x1f9/0x2660 [ 31.260702] do_mmap+0x854/0xf00 [ 31.261192] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.261743] ksys_mmap_pgoff+0x3af/0x500 [ 31.262305] do_syscall_64+0x3f/0x90 [ 31.262840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263580] [ 31.263818] The buggy address belongs to the object at ffff88800c4da828 [ 31.263818] which belongs to the cache vm_area_struct of size 168 [ 31.265478] The buggy address is located 88 bytes inside of [ 31.265478] freed 168-byte region [ffff88800c4da828, ffff88800c4da8d0) [ 31.267082] [ 31.267323] The buggy address belongs to the physical page: [ 31.268070] page:000000000ebfae45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4da [ 31.269296] memcg:ffff888014411001 [ 31.269780] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.270515] page_type: 0xffffffff() [ 31.271034] raw: 0100000000000200 ffff8880087a0c80 ffffea00003650c0 dead000000000008 [ 31.272070] raw: 0000000000000000 0000000080110011 00000001ffffffff ffff888014411001 [ 31.273077] page dumped because: kasan: bad access detected [ 31.273812] [ 31.274053] Memory state around the buggy address: [ 31.274690] ffff88800c4da780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.275665] ffff88800c4da800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.276624] >ffff88800c4da880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.277569] ^ [ 31.278030] ffff88800c4da900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.278992] ffff88800c4da980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fb [ 31.279938] ================================================================== [ 31.281150] Disabling lock debugging due to kernel taint [ 33.281686] BUG: Bad rss-counter state mm:000000009f2d951c type:MM_FILEPAGES val:33 [ 33.282826] BUG: Bad rss-counter state mm:000000009f2d951c type:MM_ANONPAGES val:22 [ 33.793402] BUG: Bad rss-counter state mm:000000007ee90834 type:MM_FILEPAGES val:33 [ 33.794645] BUG: Bad rss-counter state mm:000000007ee90834 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33460' (ECDSA) to the list of known hosts. 2023/06/21 03:37:21 fuzzer started 2023/06/21 03:37:21 dialing manager at localhost:36067 2023/06/21 03:37:21 checking machine... 2023/06/21 03:37:21 checking revisions... [ 34.480777] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:37:21 testing simple program... [ 34.535108] cgroup: Unknown subsys name 'net' [ 34.583715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:37:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff25b9e908 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=00007fe0d5be3510000055dfedffc790 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=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800f023680 RSI=ffffffff8186c7bd RDI=ffff88800ea66f00 RBP=ffff88800ea66f00 RSP=ffff888019ebfdd8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800f023ef8 R13=ffff88800f023680 R14=0000000000000001 R15=ffff88800ea66f00 RIP=ffffffff814c0864 RFL=00000282 [--S----] 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 00007f33b0bb6900 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=00007f33b116e0b0 CR3=000000000c9bc000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000