syzkaller login: [ 30.303967] BUG: Bad rss-counter state mm:0000000007209de5 type:MM_FILEPAGES val:33 [ 30.305018] BUG: Bad rss-counter state mm:0000000007209de5 type:MM_ANONPAGES val:22 [ 30.479014] ================================================================== [ 30.479912] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.480860] Read of size 8 at addr ffff888016f91798 by task sshd/220 [ 30.481720] [ 30.481940] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.482785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.483755] Call Trace: [ 30.484079] [ 30.484361] dump_stack_lvl+0x91/0xf0 [ 30.484864] print_report+0xcc/0x620 [ 30.485340] ? __virt_addr_valid+0x102/0x340 [ 30.485885] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.486496] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.487106] kasan_report+0xbe/0xf0 [ 30.487581] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.488217] vma_interval_tree_remove+0xc75/0xec0 [ 30.488837] vma_prepare+0xc54/0x11a0 [ 30.489313] __split_vma+0x5af/0x950 [ 30.489783] ? __pfx___split_vma+0x10/0x10 [ 30.490308] ? find_held_lock+0x2c/0x110 [ 30.490822] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.491378] ? lock_is_held_type+0x9f/0x120 [ 30.491912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.492533] ? mtree_range_walk+0x632/0x900 [ 30.493091] ? mas_walk+0x5c7/0x7c0 [ 30.493565] do_vmi_munmap+0x1f1/0x2b0 [ 30.494058] mmap_region+0x1f9/0x2660 [ 30.494533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.495048] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.495759] ? __pfx_lock_acquire+0x10/0x10 [ 30.496297] ? __pfx_mmap_region+0x10/0x10 [ 30.496837] ? security_mmap_addr+0x7d/0xa0 [ 30.497369] ? get_unmapped_area+0x1f5/0x3f0 [ 30.497920] do_mmap+0x854/0xf00 [ 30.498358] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.498851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.499417] ksys_mmap_pgoff+0x3af/0x500 [ 30.499920] do_syscall_64+0x3f/0x90 [ 30.500398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.501070] RIP: 0033:0x7f106dfbbd82 [ 30.501526] 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 [ 30.503633] RSP: 002b:00007ffc6a7bfc48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.504539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f106dfbbd82 [ 30.505384] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f106d3f5000 [ 30.506229] RBP: 00007f106d3f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.507071] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d117402f70 [ 30.507914] R13: 00007ffc6a7bfc60 R14: 00007ffc6a7bfc90 R15: 00007ffc6a7bfff0 [ 30.508774] [ 30.509066] [ 30.509279] Allocated by task 213: [ 30.509714] kasan_save_stack+0x22/0x50 [ 30.510211] kasan_set_track+0x25/0x30 [ 30.510712] __kasan_slab_alloc+0x59/0x70 [ 30.511234] kmem_cache_alloc+0x16b/0x370 [ 30.511742] vm_area_dup+0x20/0x160 [ 30.512196] __split_vma+0x170/0x950 [ 30.512673] split_vma+0xc6/0x110 [ 30.513111] mprotect_fixup+0x8d2/0xb30 [ 30.513613] do_mprotect_pkey+0x87e/0xd40 [ 30.514129] __x64_sys_mprotect+0x78/0xc0 [ 30.514647] do_syscall_64+0x3f/0x90 [ 30.515123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515762] [ 30.515979] Freed by task 213: [ 30.516387] kasan_save_stack+0x22/0x50 [ 30.516895] kasan_set_track+0x25/0x30 [ 30.517386] kasan_save_free_info+0x2b/0x50 [ 30.517914] __kasan_slab_free+0x10a/0x190 [ 30.518445] kmem_cache_free+0x10d/0x4d0 [ 30.518949] rcu_core+0x8c8/0x2860 [ 30.519390] __do_softirq+0x1b7/0x7d4 [ 30.519867] [ 30.520081] Last potentially related work creation: [ 30.520677] kasan_save_stack+0x22/0x50 [ 30.521193] __kasan_record_aux_stack+0x8e/0xa0 [ 30.521761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.522402] remove_vma+0x139/0x170 [ 30.522848] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.523398] do_vmi_munmap+0x1f1/0x2b0 [ 30.523882] __vm_munmap+0x138/0x3a0 [ 30.524343] __x64_sys_munmap+0x59/0x80 [ 30.524842] do_syscall_64+0x3f/0x90 [ 30.525311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.525946] [ 30.526164] The buggy address belongs to the object at ffff888016f91740 [ 30.526164] which belongs to the cache vm_area_struct of size 168 [ 30.527642] The buggy address is located 88 bytes inside of [ 30.527642] freed 168-byte region [ffff888016f91740, ffff888016f917e8) [ 30.529049] [ 30.529264] The buggy address belongs to the physical page: [ 30.529928] page:000000005f743e44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f91 [ 30.531023] memcg:ffff88800e7ebe01 [ 30.531450] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.532091] page_type: 0xffffffff() [ 30.532565] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.533486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7ebe01 [ 30.534382] page dumped because: kasan: bad access detected [ 30.535037] [ 30.535251] Memory state around the buggy address: [ 30.535835] ffff888016f91680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.536695] ffff888016f91700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.537556] >ffff888016f91780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.538407] ^ [ 30.538903] ffff888016f91800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.539746] ffff888016f91880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.540610] ================================================================== [ 30.541582] Disabling lock debugging due to kernel taint [ 32.750819] BUG: Bad rss-counter state mm:0000000026694e0b type:MM_FILEPAGES val:33 [ 32.752048] BUG: Bad rss-counter state mm:0000000026694e0b type:MM_ANONPAGES val:22 [ 33.266035] BUG: Bad rss-counter state mm:00000000d341f621 type:MM_FILEPAGES val:33 [ 33.267196] BUG: Bad rss-counter state mm:00000000d341f621 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19580' (ECDSA) to the list of known hosts. 2023/06/20 10:56:51 fuzzer started 2023/06/20 10:56:52 dialing manager at localhost:36067 2023/06/20 10:56:52 checking machine... 2023/06/20 10:56:52 checking revisions... [ 33.896162] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:56:52 testing simple program... [ 33.943629] cgroup: Unknown subsys name 'net' [ 33.996718] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:51 Registers: info registers vcpu 0 RAX=ffffffff818df6d3 RBX=0000000000000001 RCX=ffffffff863b2b01 RDX=ffff88800fd1f8e0 RSI=ffffffff818df6d3 RDI=ffff88800fd1f898 RBP=ffff88800fd1f8f0 RSP=ffff88800fd1f828 R8 =ffffffff863b2b1a R9 =ffff88800fd1f8d8 R10=0000000000038001 R11=000000000008a79f R12=ffff88800fd1f960 R13=ffff88800fd1f8e0 R14=ffff888016810000 R15=ffff88800fd1f898 RIP=ffffffff81130641 RFL=00000246 [---Z-P-] 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 00007f47b01f1900 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=00007f47b07a6650 CR3=000000001a39c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f4275290600 CR3=000000000d418000 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=a8e64bcac2e391832d4ddfacd7e52f0b XMM02=ec2efd57dc4c00df000000000011ae08 XMM03=3ba126b157b22391000000000011aed8 XMM04=777771cb9974128c00000000000ae988 XMM05=ec96035ca432e6640000000000132778 XMM06=4fda316b135da52b0000000000131568 XMM07=fb795ef6d65770560000000000121818 XMM08=2c67c8bc2e329bc3000000000011ae78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000