syzkaller login: [ 31.338972] BUG: Bad rss-counter state mm:000000007184d95a type:MM_FILEPAGES val:33 [ 31.340641] BUG: Bad rss-counter state mm:000000007184d95a type:MM_ANONPAGES val:22 [ 31.505066] ================================================================== [ 31.505982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.506919] Read of size 8 at addr ffff88800dab4ed8 by task sshd/220 [ 31.507684] [ 31.507901] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.508878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.509849] Call Trace: [ 31.510190] [ 31.510473] dump_stack_lvl+0x91/0xf0 [ 31.510960] print_report+0xcc/0x620 [ 31.511446] ? __virt_addr_valid+0x102/0x340 [ 31.511996] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.512637] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.513250] kasan_report+0xbe/0xf0 [ 31.513727] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.514346] vma_interval_tree_remove+0xc75/0xec0 [ 31.514946] vma_prepare+0xc54/0x11a0 [ 31.515425] __split_vma+0x5af/0x950 [ 31.515892] ? __pfx___split_vma+0x10/0x10 [ 31.516424] ? find_held_lock+0x2c/0x110 [ 31.516940] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.517505] ? lock_is_held_type+0x9f/0x120 [ 31.518036] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.518636] ? mtree_range_walk+0x632/0x900 [ 31.519183] ? mas_walk+0x5c7/0x7c0 [ 31.519656] do_vmi_munmap+0x1f1/0x2b0 [ 31.520172] mmap_region+0x1f9/0x2660 [ 31.520653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.521164] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.521877] ? __pfx_lock_acquire+0x10/0x10 [ 31.522402] ? __pfx_mmap_region+0x10/0x10 [ 31.522933] ? security_mmap_addr+0x7d/0xa0 [ 31.523460] ? get_unmapped_area+0x1f5/0x3f0 [ 31.524003] do_mmap+0x854/0xf00 [ 31.524448] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.524940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.525495] ksys_mmap_pgoff+0x3af/0x500 [ 31.526001] do_syscall_64+0x3f/0x90 [ 31.526480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.527118] RIP: 0033:0x7f8abf8ebd82 [ 31.527579] 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 [ 31.529690] RSP: 002b:00007fff60f65df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.530584] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8abf8ebd82 [ 31.531418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8abed25000 [ 31.532281] RBP: 00007f8abed25000 R08: 0000000000000009 R09: 0000000000001000 [ 31.533113] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a65b9f980 [ 31.533954] R13: 00007fff60f65e10 R14: 00007fff60f65e40 R15: 00007fff60f661a0 [ 31.534803] [ 31.535096] [ 31.535312] Allocated by task 213: [ 31.535735] kasan_save_stack+0x22/0x50 [ 31.536251] kasan_set_track+0x25/0x30 [ 31.536736] __kasan_slab_alloc+0x59/0x70 [ 31.537252] kmem_cache_alloc+0x16b/0x370 [ 31.537767] vm_area_dup+0x20/0x160 [ 31.538218] __split_vma+0x170/0x950 [ 31.538680] split_vma+0xc6/0x110 [ 31.539117] mprotect_fixup+0x8d2/0xb30 [ 31.539610] do_mprotect_pkey+0x87e/0xd40 [ 31.540124] __x64_sys_mprotect+0x78/0xc0 [ 31.540656] do_syscall_64+0x3f/0x90 [ 31.541133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.541767] [ 31.541981] Freed by task 204: [ 31.542368] kasan_save_stack+0x22/0x50 [ 31.542868] kasan_set_track+0x25/0x30 [ 31.543357] kasan_save_free_info+0x2b/0x50 [ 31.543888] __kasan_slab_free+0x10a/0x190 [ 31.544430] kmem_cache_free+0x10d/0x4d0 [ 31.544933] rcu_core+0x8c8/0x2860 [ 31.545380] __do_softirq+0x1b7/0x7d4 [ 31.545853] [ 31.546069] Last potentially related work creation: [ 31.546645] kasan_save_stack+0x22/0x50 [ 31.547143] __kasan_record_aux_stack+0x8e/0xa0 [ 31.547711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.548362] remove_vma+0x139/0x170 [ 31.548808] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.549367] do_vmi_munmap+0x1f1/0x2b0 [ 31.549848] __vm_munmap+0x138/0x3a0 [ 31.550310] __x64_sys_munmap+0x59/0x80 [ 31.550802] do_syscall_64+0x3f/0x90 [ 31.551270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.551909] [ 31.552127] The buggy address belongs to the object at ffff88800dab4e80 [ 31.552127] which belongs to the cache vm_area_struct of size 168 [ 31.553599] The buggy address is located 88 bytes inside of [ 31.553599] freed 168-byte region [ffff88800dab4e80, ffff88800dab4f28) [ 31.554991] [ 31.555204] The buggy address belongs to the physical page: [ 31.555859] page:0000000029fd2b1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdab4 [ 31.556930] memcg:ffff88800ed6b301 [ 31.557353] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.557988] page_type: 0xffffffff() [ 31.558434] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.559347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed6b301 [ 31.560250] page dumped because: kasan: bad access detected [ 31.560907] [ 31.561121] Memory state around the buggy address: [ 31.561696] ffff88800dab4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.562560] ffff88800dab4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.563419] >ffff88800dab4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.564293] ^ [ 31.565020] ffff88800dab4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.565885] ffff88800dab4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.566735] ================================================================== [ 31.567755] Disabling lock debugging due to kernel taint [ 33.488355] BUG: Bad rss-counter state mm:00000000f30cd652 type:MM_FILEPAGES val:33 [ 33.489377] BUG: Bad rss-counter state mm:00000000f30cd652 type:MM_ANONPAGES val:22 [ 33.970952] BUG: Bad rss-counter state mm:00000000c49eb975 type:MM_FILEPAGES val:33 [ 33.972600] BUG: Bad rss-counter state mm:00000000c49eb975 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27692' (ECDSA) to the list of known hosts. 2023/06/19 20:46:24 fuzzer started 2023/06/19 20:46:24 dialing manager at localhost:44161 2023/06/19 20:46:24 checking machine... 2023/06/19 20:46:24 checking revisions... [ 34.726035] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:46:24 testing simple program... [ 34.788945] cgroup: Unknown subsys name 'net' [ 34.847790] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:46:23 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=00007f17c27981d8 CR3=000000000c974000 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=2033323a36343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a36343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652988 RCX=0000000000000000 RDX=ffff888015950000 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016cff798 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=ffff8880199dabe0 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 00007f98ee297900 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=00007ffc212cb000 CR3=00000000166c8000 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=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