syzkaller login: [ 32.305229] BUG: Bad rss-counter state mm:00000000c2b586ec type:MM_FILEPAGES val:33 [ 32.306227] BUG: Bad rss-counter state mm:00000000c2b586ec type:MM_ANONPAGES val:22 [ 32.468460] ================================================================== [ 32.469389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.470330] Read of size 8 at addr ffff8880102d5310 by task sshd/221 [ 32.471258] [ 32.471512] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.472375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.473348] Call Trace: [ 32.473689] [ 32.473984] dump_stack_lvl+0x91/0xf0 [ 32.474479] print_report+0xcc/0x620 [ 32.474994] ? __virt_addr_valid+0x102/0x340 [ 32.475546] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.476160] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.476784] kasan_report+0xbe/0xf0 [ 32.477267] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.477887] vma_interval_tree_remove+0xc75/0xec0 [ 32.478497] vma_prepare+0xc54/0x11a0 [ 32.478994] __split_vma+0x5af/0x950 [ 32.479480] ? __pfx___split_vma+0x10/0x10 [ 32.480004] ? find_held_lock+0x2c/0x110 [ 32.480520] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.481087] ? lock_is_held_type+0x9f/0x120 [ 32.481623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.482235] ? mtree_range_walk+0x632/0x900 [ 32.482803] ? mas_walk+0x5c7/0x7c0 [ 32.483281] do_vmi_munmap+0x1f1/0x2b0 [ 32.483773] mmap_region+0x1f9/0x2660 [ 32.484253] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.484763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.485483] ? __pfx_lock_acquire+0x10/0x10 [ 32.486011] ? __pfx_mmap_region+0x10/0x10 [ 32.486541] ? security_mmap_addr+0x7d/0xa0 [ 32.487093] ? get_unmapped_area+0x1f5/0x3f0 [ 32.487645] do_mmap+0x854/0xf00 [ 32.488087] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.488584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.489142] ksys_mmap_pgoff+0x3af/0x500 [ 32.489661] do_syscall_64+0x3f/0x90 [ 32.490140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.490794] RIP: 0033:0x7f8554380d82 [ 32.491248] 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 [ 32.493368] RSP: 002b:00007ffe6674ea18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.494290] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8554380d82 [ 32.495149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85537ba000 [ 32.496000] RBP: 00007f85537ba000 R08: 0000000000000009 R09: 0000000000001000 [ 32.496845] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557abb03bec0 [ 32.497698] R13: 00007ffe6674ea30 R14: 00007ffe6674ea60 R15: 00007ffe6674edc0 [ 32.498554] [ 32.498871] [ 32.499088] Allocated by task 214: [ 32.499521] kasan_save_stack+0x22/0x50 [ 32.500027] kasan_set_track+0x25/0x30 [ 32.500531] __kasan_slab_alloc+0x59/0x70 [ 32.501052] kmem_cache_alloc+0x16b/0x370 [ 32.501565] vm_area_dup+0x20/0x160 [ 32.502020] __split_vma+0x170/0x950 [ 32.502485] split_vma+0xc6/0x110 [ 32.502935] mprotect_fixup+0x8d2/0xb30 [ 32.503438] do_mprotect_pkey+0x87e/0xd40 [ 32.503961] __x64_sys_mprotect+0x78/0xc0 [ 32.504476] do_syscall_64+0x3f/0x90 [ 32.504951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.505588] [ 32.505804] Freed by task 203: [ 32.506195] kasan_save_stack+0x22/0x50 [ 32.506695] kasan_set_track+0x25/0x30 [ 32.507211] kasan_save_free_info+0x2b/0x50 [ 32.507747] __kasan_slab_free+0x10a/0x190 [ 32.508282] kmem_cache_free+0x10d/0x4d0 [ 32.508788] rcu_core+0x8c8/0x2860 [ 32.509232] __do_softirq+0x1b7/0x7d4 [ 32.509715] [ 32.509929] Last potentially related work creation: [ 32.510509] kasan_save_stack+0x22/0x50 [ 32.511017] __kasan_record_aux_stack+0x8e/0xa0 [ 32.511593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.512227] remove_vma+0x139/0x170 [ 32.512679] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.513352] do_vmi_munmap+0x1f1/0x2b0 [ 32.513837] __vm_munmap+0x138/0x3a0 [ 32.514302] __x64_sys_munmap+0x59/0x80 [ 32.514821] do_syscall_64+0x3f/0x90 [ 32.515296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.515944] [ 32.516161] The buggy address belongs to the object at ffff8880102d52b8 [ 32.516161] which belongs to the cache vm_area_struct of size 168 [ 32.517639] The buggy address is located 88 bytes inside of [ 32.517639] freed 168-byte region [ffff8880102d52b8, ffff8880102d5360) [ 32.519050] [ 32.519267] The buggy address belongs to the physical page: [ 32.519933] page:00000000203d5241 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102d5 [ 32.521033] memcg:ffff88800d92b401 [ 32.521466] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.522122] page_type: 0xffffffff() [ 32.522568] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.523492] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d92b401 [ 32.524399] page dumped because: kasan: bad access detected [ 32.525066] [ 32.525283] Memory state around the buggy address: [ 32.525866] ffff8880102d5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.526747] ffff8880102d5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.527598] >ffff8880102d5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.528457] ^ [ 32.528919] ffff8880102d5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.529778] ffff8880102d5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.530629] ================================================================== [ 32.531582] Disabling lock debugging due to kernel taint [ 35.229537] BUG: Bad rss-counter state mm:00000000e0efb92d type:MM_FILEPAGES val:33 [ 35.230714] BUG: Bad rss-counter state mm:00000000e0efb92d type:MM_ANONPAGES val:22 [ 35.627254] BUG: Bad rss-counter state mm:000000006ea8ee9d type:MM_FILEPAGES val:33 [ 35.628489] BUG: Bad rss-counter state mm:000000006ea8ee9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63310' (ECDSA) to the list of known hosts. 2023/06/20 02:24:48 fuzzer started 2023/06/20 02:24:49 dialing manager at localhost:44161 2023/06/20 02:24:49 checking machine... 2023/06/20 02:24:49 checking revisions... [ 36.354886] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:24:49 testing simple program... [ 36.410176] cgroup: Unknown subsys name 'net' [ 36.465993] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:24:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000713 RCX=ffffffff8162f824 RDX=ffff88800ca19b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888017e57b40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000713 R11=4e49474f4c20230a R12=ffffea00006a0900 R13=ffff888017e57c00 R14=ffff888017e57e00 R15=dffffc0000000000 RIP=ffffffff814c07e0 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 00007f4057940900 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=00007f4057ef5650 CR3=000000001bede000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f612ac30bb0 CR3=000000000d6e8000 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=b004a865c84a68aa8e40b5d616ba5862 XMM02=000000000011c940eff9b2d0a8fce9cb XMM03=000000000011ca102c67c8bc2e329bc3 XMM04=da5ea37b14fa75ea00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d40 XMM06=f34eef264a15f3d70000000000132ba8 XMM07=e042d86d42eb936e00000000001244d8 XMM08=d9162b50ae2dd523000000000011ca10 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000