syzkaller login: [ 31.388433] BUG: Bad rss-counter state mm:00000000a3c10d90 type:MM_FILEPAGES val:33 [ 31.389768] BUG: Bad rss-counter state mm:00000000a3c10d90 type:MM_ANONPAGES val:22 [ 31.429377] ================================================================== [ 31.430467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.431500] Read of size 8 at addr ffff88800f26a140 by task sshd/220 [ 31.432352] [ 31.432591] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.433560] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.434639] Call Trace: [ 31.434993] [ 31.435306] dump_stack_lvl+0x91/0xf0 [ 31.435849] print_report+0xcc/0x620 [ 31.436381] ? __virt_addr_valid+0x102/0x340 [ 31.437007] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.437687] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.438370] kasan_report+0xbe/0xf0 [ 31.438904] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.439593] vma_interval_tree_remove+0xc75/0xec0 [ 31.440259] vma_prepare+0xc54/0x11a0 [ 31.440817] __split_vma+0x5af/0x950 [ 31.441337] ? __pfx___split_vma+0x10/0x10 [ 31.441925] ? find_held_lock+0x2c/0x110 [ 31.442506] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.443134] ? lock_is_held_type+0x9f/0x120 [ 31.443730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.444400] ? mtree_range_walk+0x632/0x900 [ 31.445022] ? mas_walk+0x5c7/0x7c0 [ 31.445550] do_vmi_munmap+0x1f1/0x2b0 [ 31.446097] mmap_region+0x1f9/0x2660 [ 31.446630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.447197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.447979] ? __pfx_lock_acquire+0x10/0x10 [ 31.448566] ? __pfx_mmap_region+0x10/0x10 [ 31.449176] ? security_mmap_addr+0x7d/0xa0 [ 31.449765] ? get_unmapped_area+0x1f5/0x3f0 [ 31.450375] do_mmap+0x854/0xf00 [ 31.450859] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.451403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.452025] ksys_mmap_pgoff+0x3af/0x500 [ 31.452585] do_syscall_64+0x3f/0x90 [ 31.453133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.453850] RIP: 0033:0x7f1c105e8d82 [ 31.454355] 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 [ 31.456896] RSP: 002b:00007ffdc6b40128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.457901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c105e8d82 [ 31.458836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c0fa22000 [ 31.459772] RBP: 00007f1c0fa22000 R08: 0000000000000009 R09: 0000000000001000 [ 31.460715] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f14a689ec0 [ 31.461658] R13: 00007ffdc6b40140 R14: 00007ffdc6b40170 R15: 00007ffdc6b404d0 [ 31.462605] [ 31.462927] [ 31.463162] Allocated by task 213: [ 31.463637] kasan_save_stack+0x22/0x50 [ 31.464198] kasan_set_track+0x25/0x30 [ 31.464753] __kasan_slab_alloc+0x59/0x70 [ 31.465336] kmem_cache_alloc+0x16b/0x370 [ 31.465907] vm_area_dup+0x20/0x160 [ 31.466414] __split_vma+0x170/0x950 [ 31.466933] split_vma+0xc6/0x110 [ 31.467416] mprotect_fixup+0x8d2/0xb30 [ 31.467974] do_mprotect_pkey+0x87e/0xd40 [ 31.468555] __x64_sys_mprotect+0x78/0xc0 [ 31.469157] do_syscall_64+0x3f/0x90 [ 31.469683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.470393] [ 31.470632] Freed by task 213: [ 31.471066] kasan_save_stack+0x22/0x50 [ 31.471622] kasan_set_track+0x25/0x30 [ 31.472168] kasan_save_free_info+0x2b/0x50 [ 31.472766] __kasan_slab_free+0x10a/0x190 [ 31.473354] kmem_cache_free+0x10d/0x4d0 [ 31.473919] rcu_core+0x8c8/0x2860 [ 31.474414] __do_softirq+0x1b7/0x7d4 [ 31.474942] [ 31.475181] Last potentially related work creation: [ 31.475828] kasan_save_stack+0x22/0x50 [ 31.476385] __kasan_record_aux_stack+0x8e/0xa0 [ 31.477042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.477754] remove_vma+0x139/0x170 [ 31.478254] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.478871] do_vmi_munmap+0x1f1/0x2b0 [ 31.479407] __vm_munmap+0x138/0x3a0 [ 31.479925] __x64_sys_munmap+0x59/0x80 [ 31.480471] do_syscall_64+0x3f/0x90 [ 31.481004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.481713] [ 31.481950] The buggy address belongs to the object at ffff88800f26a0e8 [ 31.481950] which belongs to the cache vm_area_struct of size 168 [ 31.483580] The buggy address is located 88 bytes inside of [ 31.483580] freed 168-byte region [ffff88800f26a0e8, ffff88800f26a190) [ 31.485151] [ 31.485388] The buggy address belongs to the physical page: [ 31.486118] page:000000006eedcad8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf26a [ 31.487321] memcg:ffff888015814b01 [ 31.487793] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.488508] page_type: 0xffffffff() [ 31.489014] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.490038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015814b01 [ 31.491048] page dumped because: kasan: bad access detected [ 31.491778] [ 31.492015] Memory state around the buggy address: [ 31.492667] ffff88800f26a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.493622] ffff88800f26a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.494568] >ffff88800f26a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.495507] ^ [ 31.496210] ffff88800f26a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.497176] ffff88800f26a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.498116] ================================================================== [ 31.499493] Disabling lock debugging due to kernel taint [ 33.422945] BUG: Bad rss-counter state mm:0000000061a7ff14 type:MM_FILEPAGES val:33 [ 33.424215] BUG: Bad rss-counter state mm:0000000061a7ff14 type:MM_ANONPAGES val:22 [ 33.963203] BUG: Bad rss-counter state mm:0000000034f0ca17 type:MM_FILEPAGES val:33 [ 33.964350] BUG: Bad rss-counter state mm:0000000034f0ca17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46653' (ECDSA) to the list of known hosts. 2023/06/19 22:53:16 fuzzer started 2023/06/19 22:53:16 dialing manager at localhost:44161 2023/06/19 22:53:16 checking machine... 2023/06/19 22:53:16 checking revisions... [ 34.595046] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:53:16 testing simple program... [ 34.638082] cgroup: Unknown subsys name 'net' [ 34.682632] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:53:15 Registers: info registers vcpu 0 RAX=00000000fbad2488 RBX=000055ff8314e0c0 RCX=0000000000323135 RDX=0000000000000007 RSI=0000000035414853 RDI=000055ff83143d00 RBP=000055ff83143d00 RSP=00007ffd47fc39c8 R8 =000055ff8314f0b0 R9 =00007fb2ce6e0be0 R10=0000000000000100 R11=0000000000000246 R12=000055ff83143d00 R13=000055ff8314f0b0 R14=00007fb2ce109b22 R15=00007fb2ce12e710 RIP=00007fb2ce5a4063 RFL=00000282 [--S----] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb2ce12e900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd47fbe000 CR3=0000000010284000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000006 RBX=0000000000000002 RCX=ffffffff8180c8d9 RDX=0000000000000006 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffff88806cf09ad0 RSP=ffff88806cf099d0 R8 =ffffffff861375e0 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfcaa0 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8112fc21 RFL=00000216 [----AP-] 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 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=00007ff783e57a90 CR3=00000000144e8000 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=2035313a33353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a33353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000