syzkaller login: [ 70.333712] BUG: Bad rss-counter state mm:0000000049ad1189 type:MM_FILEPAGES val:33 [ 70.335096] BUG: Bad rss-counter state mm:0000000049ad1189 type:MM_ANONPAGES val:22 [ 70.479655] ================================================================== [ 70.480562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.481502] Read of size 8 at addr ffff88800c6d1140 by task sshd/220 [ 70.482346] [ 70.482589] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.483602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.484612] Call Trace: [ 70.484932] [ 70.485221] dump_stack_lvl+0x91/0xf0 [ 70.485719] print_report+0xcc/0x620 [ 70.486203] ? __virt_addr_valid+0x102/0x340 [ 70.486758] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.487373] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.488001] kasan_report+0xbe/0xf0 [ 70.488478] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.489091] vma_interval_tree_remove+0xc75/0xec0 [ 70.489691] vma_prepare+0xc54/0x11a0 [ 70.490173] __split_vma+0x5af/0x950 [ 70.490648] ? __pfx___split_vma+0x10/0x10 [ 70.491173] ? find_held_lock+0x2c/0x110 [ 70.491691] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.492277] ? lock_is_held_type+0x9f/0x120 [ 70.492814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.493412] ? mtree_range_walk+0x632/0x900 [ 70.493958] ? mas_walk+0x5c7/0x7c0 [ 70.494426] do_vmi_munmap+0x1f1/0x2b0 [ 70.494913] mmap_region+0x1f9/0x2660 [ 70.495393] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.495928] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.496647] ? __pfx_lock_acquire+0x10/0x10 [ 70.497178] ? __pfx_mmap_region+0x10/0x10 [ 70.497704] ? security_mmap_addr+0x7d/0xa0 [ 70.498229] ? get_unmapped_area+0x1f5/0x3f0 [ 70.498777] do_mmap+0x854/0xf00 [ 70.499215] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.499710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.500278] ksys_mmap_pgoff+0x3af/0x500 [ 70.500783] do_syscall_64+0x3f/0x90 [ 70.501257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.501898] RIP: 0033:0x7fcc9d6d8d82 [ 70.502350] 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 [ 70.504497] RSP: 002b:00007ffe56e43618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.505427] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc9d6d8d82 [ 70.506313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc9cb12000 [ 70.507184] RBP: 00007fcc9cb12000 R08: 0000000000000009 R09: 0000000000001000 [ 70.508070] R10: 0000000000000812 R11: 0000000000000206 R12: 000055909ee63980 [ 70.508960] R13: 00007ffe56e43630 R14: 00007ffe56e43660 R15: 00007ffe56e439c0 [ 70.509859] [ 70.510163] [ 70.510386] Allocated by task 213: [ 70.510836] kasan_save_stack+0x22/0x50 [ 70.511362] kasan_set_track+0x25/0x30 [ 70.511889] __kasan_slab_alloc+0x59/0x70 [ 70.512436] kmem_cache_alloc+0x16b/0x370 [ 70.512976] vm_area_dup+0x20/0x160 [ 70.513447] __split_vma+0x170/0x950 [ 70.513927] split_vma+0xc6/0x110 [ 70.514384] mprotect_fixup+0x8d2/0xb30 [ 70.514905] do_mprotect_pkey+0x87e/0xd40 [ 70.515439] __x64_sys_mprotect+0x78/0xc0 [ 70.515999] do_syscall_64+0x3f/0x90 [ 70.516490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.517149] [ 70.517369] Freed by task 13: [ 70.517769] kasan_save_stack+0x22/0x50 [ 70.518290] kasan_set_track+0x25/0x30 [ 70.518810] kasan_save_free_info+0x2b/0x50 [ 70.519359] __kasan_slab_free+0x10a/0x190 [ 70.519913] kmem_cache_free+0x10d/0x4d0 [ 70.520436] rcu_core+0x8c8/0x2860 [ 70.520897] __do_softirq+0x1b7/0x7d4 [ 70.521391] [ 70.521614] Last potentially related work creation: [ 70.522232] kasan_save_stack+0x22/0x50 [ 70.522753] __kasan_record_aux_stack+0x8e/0xa0 [ 70.523355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.524047] remove_vma+0x139/0x170 [ 70.524513] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.525088] do_vmi_munmap+0x1f1/0x2b0 [ 70.525602] __vm_munmap+0x138/0x3a0 [ 70.526083] __x64_sys_munmap+0x59/0x80 [ 70.526593] do_syscall_64+0x3f/0x90 [ 70.527083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.527755] [ 70.527987] The buggy address belongs to the object at ffff88800c6d10e8 [ 70.527987] which belongs to the cache vm_area_struct of size 168 [ 70.529523] The buggy address is located 88 bytes inside of [ 70.529523] freed 168-byte region [ffff88800c6d10e8, ffff88800c6d1190) [ 70.530968] [ 70.531188] The buggy address belongs to the physical page: [ 70.531869] page:00000000c5aed13e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d1 [ 70.533010] memcg:ffff88800e786b01 [ 70.533464] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.534157] page_type: 0xffffffff() [ 70.534636] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.535601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e786b01 [ 70.536578] page dumped because: kasan: bad access detected [ 70.537291] [ 70.537516] Memory state around the buggy address: [ 70.538125] ffff88800c6d1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.539034] ffff88800c6d1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 70.539946] >ffff88800c6d1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.540859] ^ [ 70.541534] ffff88800c6d1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 70.542444] ffff88800c6d1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 70.543331] ================================================================== [ 70.544368] Disabling lock debugging due to kernel taint [ 72.364488] BUG: Bad rss-counter state mm:00000000b34ef6d9 type:MM_FILEPAGES val:33 [ 72.365650] BUG: Bad rss-counter state mm:00000000b34ef6d9 type:MM_ANONPAGES val:22 [ 72.796831] BUG: Bad rss-counter state mm:00000000be99daf2 type:MM_FILEPAGES val:33 [ 72.797844] BUG: Bad rss-counter state mm:00000000be99daf2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29379' (ECDSA) to the list of known hosts. 2023/06/20 07:58:25 fuzzer started 2023/06/20 07:58:25 dialing manager at localhost:44161 2023/06/20 07:58:25 checking machine... 2023/06/20 07:58:25 checking revisions... [ 73.449538] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:58:25 testing simple program... [ 73.500680] cgroup: Unknown subsys name 'net' [ 73.543935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:57:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019fad1c0 RSI=ffff88800bf77e18 RDI=0000000000000003 RBP=1ffff110017eefbf RSP=ffff88800bf77df0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=00007fff1fc5b3d0 R13=0000000000000003 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8187bc44 RFL=00000293 [--S-A-C] 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 00007f7cb5712900 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=00007f7cb5cc7650 CR3=00000000099fe000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800f917888 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856cd420 R13=ffffffff81787baa R14=0000000000000001 R15=ffffffff818470dc RIP=ffffffff8180ef24 RFL=00000202 [-------] 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 00007f0c528038c0 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=000055f643486b88 CR3=0000000009664000 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=00000000000000000000000000000000 XMM02=616c702f736563697665642f7379732f XMM03=006d726f6674616c702f736563697665 XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=000055f6434d6590000055f643487c40 XMM06=000055f6434ab5e00000000400000002 XMM07=00000000000000000000000000000000 XMM08=00000000000000210000006d726f6674 XMM09=00000000000000000000000000000000 XMM10=00000000200000000000000020000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000