syzkaller login: [ 33.240098] BUG: Bad rss-counter state mm:000000003844de96 type:MM_FILEPAGES val:33 [ 33.241113] BUG: Bad rss-counter state mm:000000003844de96 type:MM_ANONPAGES val:22 [ 33.429179] ================================================================== [ 33.430101] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.431064] Read of size 8 at addr ffff8880095ebd08 by task sshd/221 [ 33.431868] [ 33.432163] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.433162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.434164] Call Trace: [ 33.434489] [ 33.434801] dump_stack_lvl+0x91/0xf0 [ 33.435301] print_report+0xcc/0x620 [ 33.435810] ? __virt_addr_valid+0x102/0x340 [ 33.436370] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.437003] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.437625] kasan_report+0xbe/0xf0 [ 33.438104] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.438751] vma_interval_tree_remove+0xc75/0xec0 [ 33.439355] vma_prepare+0xc54/0x11a0 [ 33.439850] __split_vma+0x5af/0x950 [ 33.440322] ? __pfx___split_vma+0x10/0x10 [ 33.440853] ? find_held_lock+0x2c/0x110 [ 33.441381] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.441944] ? lock_is_held_type+0x9f/0x120 [ 33.442485] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.443091] ? mtree_range_walk+0x632/0x900 [ 33.443662] ? mas_walk+0x5c7/0x7c0 [ 33.444141] do_vmi_munmap+0x1f1/0x2b0 [ 33.444633] mmap_region+0x1f9/0x2660 [ 33.445116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.445628] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.446363] ? __pfx_lock_acquire+0x10/0x10 [ 33.446919] ? __pfx_mmap_region+0x10/0x10 [ 33.447467] ? security_mmap_addr+0x7d/0xa0 [ 33.448037] ? get_unmapped_area+0x1f5/0x3f0 [ 33.448601] do_mmap+0x854/0xf00 [ 33.449047] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.449556] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.450132] ksys_mmap_pgoff+0x3af/0x500 [ 33.450651] do_syscall_64+0x3f/0x90 [ 33.451142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.451820] RIP: 0033:0x7f0ea71c1d82 [ 33.452284] 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 [ 33.454463] RSP: 002b:00007ffc65c06208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.455435] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ea71c1d82 [ 33.456337] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ea65fb000 [ 33.457236] RBP: 00007f0ea65fb000 R08: 0000000000000009 R09: 0000000000001000 [ 33.458136] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c01fb67ec0 [ 33.459030] R13: 00007ffc65c06220 R14: 00007ffc65c06250 R15: 00007ffc65c065b0 [ 33.459955] [ 33.460257] [ 33.460489] Allocated by task 213: [ 33.460943] kasan_save_stack+0x22/0x50 [ 33.461474] kasan_set_track+0x25/0x30 [ 33.461995] __kasan_slab_alloc+0x59/0x70 [ 33.462545] kmem_cache_alloc+0x16b/0x370 [ 33.463096] vm_area_dup+0x20/0x160 [ 33.463594] __split_vma+0x170/0x950 [ 33.464085] split_vma+0xc6/0x110 [ 33.464544] mprotect_fixup+0x8d2/0xb30 [ 33.465071] do_mprotect_pkey+0x87e/0xd40 [ 33.465621] __x64_sys_mprotect+0x78/0xc0 [ 33.466170] do_syscall_64+0x3f/0x90 [ 33.466670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.467346] [ 33.467592] Freed by task 13: [ 33.467994] kasan_save_stack+0x22/0x50 [ 33.468523] kasan_set_track+0x25/0x30 [ 33.469043] kasan_save_free_info+0x2b/0x50 [ 33.469605] __kasan_slab_free+0x10a/0x190 [ 33.470174] kmem_cache_free+0x10d/0x4d0 [ 33.470710] rcu_core+0x8c8/0x2860 [ 33.471177] __do_softirq+0x1b7/0x7d4 [ 33.471708] [ 33.471960] Last potentially related work creation: [ 33.472577] kasan_save_stack+0x22/0x50 [ 33.473097] __kasan_record_aux_stack+0x8e/0xa0 [ 33.473708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.474389] remove_vma+0x139/0x170 [ 33.474868] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.475472] do_vmi_munmap+0x1f1/0x2b0 [ 33.475984] __vm_munmap+0x138/0x3a0 [ 33.476474] __x64_sys_munmap+0x59/0x80 [ 33.477001] do_syscall_64+0x3f/0x90 [ 33.477510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.478199] [ 33.478421] The buggy address belongs to the object at ffff8880095ebcb0 [ 33.478421] which belongs to the cache vm_area_struct of size 168 [ 33.479992] The buggy address is located 88 bytes inside of [ 33.479992] freed 168-byte region [ffff8880095ebcb0, ffff8880095ebd58) [ 33.481530] [ 33.481763] The buggy address belongs to the physical page: [ 33.482468] page:00000000dae210f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95eb [ 33.483641] memcg:ffff88800ca12401 [ 33.484092] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.484785] page_type: 0xffffffff() [ 33.485258] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.486235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca12401 [ 33.487208] page dumped because: kasan: bad access detected [ 33.487944] [ 33.488169] Memory state around the buggy address: [ 33.488785] ffff8880095ebc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.489699] ffff8880095ebc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.490609] >ffff8880095ebd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.491530] ^ [ 33.491997] ffff8880095ebd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.492908] ffff8880095ebe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.493810] ================================================================== [ 33.495069] Disabling lock debugging due to kernel taint [ 35.364285] BUG: Bad rss-counter state mm:0000000007702d00 type:MM_FILEPAGES val:33 [ 35.365164] BUG: Bad rss-counter state mm:0000000007702d00 type:MM_ANONPAGES val:22 [ 35.804883] BUG: Bad rss-counter state mm:000000000350b0f0 type:MM_FILEPAGES val:33 [ 35.805678] BUG: Bad rss-counter state mm:000000000350b0f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7121' (ECDSA) to the list of known hosts. 2023/06/20 07:57:54 fuzzer started 2023/06/20 07:57:54 dialing manager at localhost:44161 2023/06/20 07:57:54 checking machine... 2023/06/20 07:57:54 checking revisions... [ 36.508492] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:57:54 testing simple program... [ 36.557250] cgroup: Unknown subsys name 'net' [ 36.595176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:57:51 Registers: info registers vcpu 0 RAX=00000000b22245b2 RBX=0000000008b0c999 RCX=ffff8880165b7aec RDX=000000000000000d RSI=0000000000000005 RDI=00000000c97b08cb RBP=ffff888008442000 RSP=ffff8880165b7a30 R8 =00000000f9960651 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000dc0 R14=ffff8880165b7a98 R15=000000000000000d RIP=ffffffff82270ed8 RFL=00000283 [--S---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 00007f96b9f81900 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=00007ffe0f7b0000 CR3=0000000019622000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09d01 RSI=ffff88806cf09dd8 RDI=ffff88806cf09a58 RBP=ffff88806cf09dd8 RSP=ffff88806cf099b0 R8 =ffffffff861375e4 R9 =ffff88806cf09a88 R10=0000000000038001 R11=0000000000020dae R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09de0 R15=ffff88806cf09a48 RIP=ffffffff811304ce RFL=00000282 [--S----] 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=00007f88e0598af0 CR3=000000000d60a000 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=bc5e85150ffff79e66438d4808570c43 XMM02=000000000011ddc8ec2efd57dc4c00df XMM03=0000000000124b70a3a4c96fcaa7c859 XMM04=8b38ffd42c2eebde00000000000ae988 XMM05=e4cb8bb95a7664b600000000001346f0 XMM06=7728ed2723d3cb510000000000133558 XMM07=e042d86d42eb936e0000000000124df0 XMM08=a3a4c96fcaa7c859000000000011de28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000