syzkaller login: [ 31.095383] BUG: Bad rss-counter state mm:00000000f91ecd50 type:MM_FILEPAGES val:33 [ 31.096099] BUG: Bad rss-counter state mm:00000000f91ecd50 type:MM_ANONPAGES val:22 [ 31.225429] ================================================================== [ 31.226124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.226838] Read of size 8 at addr ffff8880144e44e0 by task sshd/220 [ 31.227418] [ 31.227582] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.228358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.229159] Call Trace: [ 31.229423] [ 31.229657] dump_stack_lvl+0x91/0xf0 [ 31.230054] print_report+0xcc/0x620 [ 31.230458] ? __virt_addr_valid+0x102/0x340 [ 31.230921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231413] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231901] kasan_report+0xbe/0xf0 [ 31.232295] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232822] vma_interval_tree_remove+0xc75/0xec0 [ 31.233310] vma_prepare+0xc54/0x11a0 [ 31.233701] __split_vma+0x5af/0x950 [ 31.234074] ? __pfx___split_vma+0x10/0x10 [ 31.234486] ? find_held_lock+0x2c/0x110 [ 31.234890] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.235317] ? lock_is_held_type+0x9f/0x120 [ 31.235730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.236206] ? mtree_range_walk+0x632/0x900 [ 31.236665] ? mas_walk+0x5c7/0x7c0 [ 31.237045] do_vmi_munmap+0x1f1/0x2b0 [ 31.237430] mmap_region+0x1f9/0x2660 [ 31.237818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.238219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.238773] ? __pfx_lock_acquire+0x10/0x10 [ 31.239202] ? __pfx_mmap_region+0x10/0x10 [ 31.239608] ? security_mmap_addr+0x7d/0xa0 [ 31.240015] ? get_unmapped_area+0x1f5/0x3f0 [ 31.240472] do_mmap+0x854/0xf00 [ 31.240817] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.241203] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.241647] ksys_mmap_pgoff+0x3af/0x500 [ 31.242047] do_syscall_64+0x3f/0x90 [ 31.242419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.242934] RIP: 0033:0x7f274d79fd82 [ 31.243304] 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 [ 31.245001] RSP: 002b:00007ffcf1344788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.245706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f274d79fd82 [ 31.246358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f274cbd9000 [ 31.247014] RBP: 00007f274cbd9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.247665] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599e7957d90 [ 31.248319] R13: 00007ffcf13447a0 R14: 00007ffcf13447d0 R15: 00007ffcf1344b30 [ 31.248990] [ 31.249213] [ 31.249380] Allocated by task 213: [ 31.249712] kasan_save_stack+0x22/0x50 [ 31.250092] kasan_set_track+0x25/0x30 [ 31.250469] __kasan_slab_alloc+0x59/0x70 [ 31.250863] kmem_cache_alloc+0x16b/0x370 [ 31.251258] vm_area_dup+0x20/0x160 [ 31.251605] __split_vma+0x170/0x950 [ 31.251962] split_vma+0xc6/0x110 [ 31.252298] mprotect_fixup+0x8d2/0xb30 [ 31.252701] do_mprotect_pkey+0x87e/0xd40 [ 31.253094] __x64_sys_mprotect+0x78/0xc0 [ 31.253491] do_syscall_64+0x3f/0x90 [ 31.253854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254349] [ 31.254516] Freed by task 213: [ 31.254826] kasan_save_stack+0x22/0x50 [ 31.255210] kasan_set_track+0x25/0x30 [ 31.255586] kasan_save_free_info+0x2b/0x50 [ 31.256001] __kasan_slab_free+0x10a/0x190 [ 31.256418] kmem_cache_free+0x10d/0x4d0 [ 31.256804] rcu_core+0x8c8/0x2860 [ 31.257150] __do_softirq+0x1b7/0x7d4 [ 31.257513] [ 31.257676] Last potentially related work creation: [ 31.258152] kasan_save_stack+0x22/0x50 [ 31.258558] __kasan_record_aux_stack+0x8e/0xa0 [ 31.259027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.259516] remove_vma+0x139/0x170 [ 31.259862] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.260293] do_vmi_munmap+0x1f1/0x2b0 [ 31.260694] __vm_munmap+0x138/0x3a0 [ 31.261041] __x64_sys_munmap+0x59/0x80 [ 31.261418] do_syscall_64+0x3f/0x90 [ 31.261778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262265] [ 31.262426] The buggy address belongs to the object at ffff8880144e4488 [ 31.262426] which belongs to the cache vm_area_struct of size 168 [ 31.263539] The buggy address is located 88 bytes inside of [ 31.263539] freed 168-byte region [ffff8880144e4488, ffff8880144e4530) [ 31.264621] [ 31.264785] The buggy address belongs to the physical page: [ 31.265283] page:00000000abd92392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144e4 [ 31.266113] memcg:ffff888019c3ce01 [ 31.266432] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.266921] page_type: 0xffffffff() [ 31.267291] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.268034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c3ce01 [ 31.268773] page dumped because: kasan: bad access detected [ 31.269293] [ 31.269456] Memory state around the buggy address: [ 31.269922] ffff8880144e4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.270589] ffff8880144e4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.271253] >ffff8880144e4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.271938] ^ [ 31.272547] ffff8880144e4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.273212] ffff8880144e4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.273877] ================================================================== [ 31.274718] Disabling lock debugging due to kernel taint [ 33.194616] BUG: Bad rss-counter state mm:00000000689e8a2d type:MM_FILEPAGES val:33 [ 33.195802] BUG: Bad rss-counter state mm:00000000689e8a2d type:MM_ANONPAGES val:22 [ 33.616868] BUG: Bad rss-counter state mm:000000002b7f9e97 type:MM_FILEPAGES val:33 [ 33.618164] BUG: Bad rss-counter state mm:000000002b7f9e97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53613' (ECDSA) to the list of known hosts. 2023/06/21 10:32:41 fuzzer started 2023/06/21 10:32:41 dialing manager at localhost:36067 2023/06/21 10:32:41 checking machine... 2023/06/21 10:32:41 checking revisions... [ 34.349064] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:32:42 testing simple program... [ 34.387132] cgroup: Unknown subsys name 'net' [ 34.434165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:32:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d947c20 RCX=0000000000000000 RDX=1ffff11001eba81d RSI=ffffffff81f7587a RDI=ffff88800f5d40e8 RBP=ffff88800a044808 RSP=ffff88800d9479b8 R8 =0000000000000005 R9 =0000000000000040 R10=0000000000000010 R11=00000000000b6a61 R12=0000000000000010 R13=ffff88800f5d40e0 R14=1ffff11001b28f3b R15=00000000ffffffea RIP=ffffffff81f758c5 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 00007f01110ac900 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=00007f01116640b0 CR3=00000000096de000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f5eb607a280 CR3=000000000d81c000 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=eccf7bb08877d4a3fb42adb5111d5afb XMM02=ec2efd57dc4c00df000000000011a290 XMM03=8744bcabde13a5f7000000000011a360 XMM04=b3f3a32cab5d204d00000000000ae988 XMM05=19e9129bd510f2350000000000131b60 XMM06=4fda316b135da52b00000000001319e8 XMM07=e042d86d42eb936e0000000000121f00 XMM08=8744bcabde13a5f7000000000011a360 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000