syzkaller login: [ 39.403295] BUG: Bad rss-counter state mm:00000000c701a6d8 type:MM_FILEPAGES val:33 [ 39.404736] BUG: Bad rss-counter state mm:00000000c701a6d8 type:MM_ANONPAGES val:22 [ 39.548650] ================================================================== [ 39.549611] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.550681] Read of size 8 at addr ffff8880098a4880 by task sshd/220 [ 39.551550] [ 39.551792] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.552896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.553986] Call Trace: [ 39.554321] [ 39.554606] dump_stack_lvl+0x91/0xf0 [ 39.555140] print_report+0xcc/0x620 [ 39.555699] ? __virt_addr_valid+0x102/0x340 [ 39.556321] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.557016] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.557708] kasan_report+0xbe/0xf0 [ 39.558198] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.558822] vma_interval_tree_remove+0xc75/0xec0 [ 39.559417] vma_prepare+0xc54/0x11a0 [ 39.559901] __split_vma+0x5af/0x950 [ 39.560370] ? __pfx___split_vma+0x10/0x10 [ 39.560925] ? find_held_lock+0x2c/0x110 [ 39.561451] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.562015] ? lock_is_held_type+0x9f/0x120 [ 39.562553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.563159] ? mtree_range_walk+0x632/0x900 [ 39.563707] ? mas_walk+0x5c7/0x7c0 [ 39.564185] do_vmi_munmap+0x1f1/0x2b0 [ 39.564685] mmap_region+0x1f9/0x2660 [ 39.565180] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.565693] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.566405] ? __pfx_lock_acquire+0x10/0x10 [ 39.566936] ? __pfx_mmap_region+0x10/0x10 [ 39.567466] ? security_mmap_addr+0x7d/0xa0 [ 39.567994] ? get_unmapped_area+0x1f5/0x3f0 [ 39.568580] do_mmap+0x854/0xf00 [ 39.569018] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.569507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.570065] ksys_mmap_pgoff+0x3af/0x500 [ 39.570567] do_syscall_64+0x3f/0x90 [ 39.571044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.571687] RIP: 0033:0x7feb58932d82 [ 39.572137] 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 [ 39.574255] RSP: 002b:00007fff60de19c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.575166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb58932d82 [ 39.576013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb57d6c000 [ 39.576867] RBP: 00007feb57d6c000 R08: 0000000000000009 R09: 0000000000001000 [ 39.577704] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624f0099d90 [ 39.578540] R13: 00007fff60de19e0 R14: 00007fff60de1a10 R15: 00007fff60de1d70 [ 39.579391] [ 39.579682] [ 39.579897] Allocated by task 213: [ 39.580329] kasan_save_stack+0x22/0x50 [ 39.580858] kasan_set_track+0x25/0x30 [ 39.581362] __kasan_slab_alloc+0x59/0x70 [ 39.581895] kmem_cache_alloc+0x16b/0x370 [ 39.582410] vm_area_dup+0x20/0x160 [ 39.582883] __split_vma+0x170/0x950 [ 39.583366] split_vma+0xc6/0x110 [ 39.583806] mprotect_fixup+0x8d2/0xb30 [ 39.584314] do_mprotect_pkey+0x87e/0xd40 [ 39.584860] __x64_sys_mprotect+0x78/0xc0 [ 39.585383] do_syscall_64+0x3f/0x90 [ 39.585864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.586511] [ 39.586728] Freed by task 213: [ 39.587117] kasan_save_stack+0x22/0x50 [ 39.587621] kasan_set_track+0x25/0x30 [ 39.588113] kasan_save_free_info+0x2b/0x50 [ 39.588653] __kasan_slab_free+0x10a/0x190 [ 39.589189] kmem_cache_free+0x10d/0x4d0 [ 39.589705] rcu_core+0x8c8/0x2860 [ 39.590156] __do_softirq+0x1b7/0x7d4 [ 39.590643] [ 39.590858] Last potentially related work creation: [ 39.591449] kasan_save_stack+0x22/0x50 [ 39.591957] __kasan_record_aux_stack+0x8e/0xa0 [ 39.592550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.593199] remove_vma+0x139/0x170 [ 39.593652] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.594207] do_vmi_munmap+0x1f1/0x2b0 [ 39.594693] __vm_munmap+0x138/0x3a0 [ 39.595163] __x64_sys_munmap+0x59/0x80 [ 39.595664] do_syscall_64+0x3f/0x90 [ 39.596140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.596793] [ 39.597010] Second to last potentially related work creation: [ 39.597692] kasan_save_stack+0x22/0x50 [ 39.598198] __kasan_record_aux_stack+0x8e/0xa0 [ 39.598772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.599416] remove_vma+0x139/0x170 [ 39.599870] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.600438] do_vmi_munmap+0x1f1/0x2b0 [ 39.600941] mmap_region+0x1f9/0x2660 [ 39.601425] do_mmap+0x854/0xf00 [ 39.601862] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.602351] ksys_mmap_pgoff+0x3af/0x500 [ 39.602853] do_syscall_64+0x3f/0x90 [ 39.603326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.603978] [ 39.604196] The buggy address belongs to the object at ffff8880098a4828 [ 39.604196] which belongs to the cache vm_area_struct of size 168 [ 39.605685] The buggy address is located 88 bytes inside of [ 39.605685] freed 168-byte region [ffff8880098a4828, ffff8880098a48d0) [ 39.607136] [ 39.607347] The buggy address belongs to the physical page: [ 39.608003] page:00000000e4b75632 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98a4 [ 39.609126] memcg:ffff888018d2dc01 [ 39.609562] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.610203] page_type: 0xffffffff() [ 39.610659] raw: 0100000000000200 ffff88800879fc80 ffffea0000356400 dead000000000004 [ 39.611578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d2dc01 [ 39.612503] page dumped because: kasan: bad access detected [ 39.613166] [ 39.613391] Memory state around the buggy address: [ 39.613979] ffff8880098a4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.614839] ffff8880098a4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.615745] >ffff8880098a4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.616627] ^ [ 39.617040] ffff8880098a4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.617908] ffff8880098a4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.618758] ================================================================== [ 39.619746] Disabling lock debugging due to kernel taint [ 41.685850] BUG: Bad rss-counter state mm:00000000e967ec6b type:MM_FILEPAGES val:33 [ 41.687010] BUG: Bad rss-counter state mm:00000000e967ec6b type:MM_ANONPAGES val:22 [ 42.069393] BUG: Bad rss-counter state mm:0000000048f29166 type:MM_FILEPAGES val:33 [ 42.070427] BUG: Bad rss-counter state mm:0000000048f29166 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49250' (ECDSA) to the list of known hosts. 2023/06/19 22:04:00 fuzzer started 2023/06/19 22:04:00 dialing manager at localhost:44161 2023/06/19 22:04:00 checking machine... 2023/06/19 22:04:00 checking revisions... [ 42.822861] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:04:00 testing simple program... [ 42.860093] cgroup: Unknown subsys name 'net' [ 42.901501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff06abcf000 CR3=0000000019cb8000 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=2039353a33303a3232203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303036373420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff88801a0bb680 RSI=ffffffff8386d60e RDI=0000000000000005 RBP=1ffff11001d68ef5 RSP=ffff88800eb477a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=00000000000b6996 R12=ffff888018ec5000 R13=ffff888018ec5080 R14=ffffffff87f94640 R15=ffff88800eb477c8 RIP=ffffffff8450bdc0 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 00007f58523d5900 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=00007f585298c618 CR3=000000000d836000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000