syzkaller login: [ 33.729536] BUG: Bad rss-counter state mm:00000000de439c76 type:MM_FILEPAGES val:33 [ 33.730727] BUG: Bad rss-counter state mm:00000000de439c76 type:MM_ANONPAGES val:22 [ 33.767195] ================================================================== [ 33.768231] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.769178] Read of size 8 at addr ffff88800ea34798 by task sshd/221 [ 33.770069] [ 33.770316] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.771261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.772236] Call Trace: [ 33.772557] [ 33.772857] dump_stack_lvl+0x91/0xf0 [ 33.773341] print_report+0xcc/0x620 [ 33.773827] ? __virt_addr_valid+0x102/0x340 [ 33.774384] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.774996] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.775608] kasan_report+0xbe/0xf0 [ 33.776082] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.776915] vma_interval_tree_remove+0xc75/0xec0 [ 33.777522] vma_prepare+0xc54/0x11a0 [ 33.777999] __split_vma+0x5af/0x950 [ 33.778475] ? __pfx___split_vma+0x10/0x10 [ 33.779010] ? find_held_lock+0x2c/0x110 [ 33.779530] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.780095] ? lock_is_held_type+0x9f/0x120 [ 33.780656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.781263] ? mtree_range_walk+0x632/0x900 [ 33.781821] ? mas_walk+0x5c7/0x7c0 [ 33.782319] do_vmi_munmap+0x1f1/0x2b0 [ 33.782809] mmap_region+0x1f9/0x2660 [ 33.783288] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.783795] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.784506] ? __pfx_lock_acquire+0x10/0x10 [ 33.785047] ? __pfx_mmap_region+0x10/0x10 [ 33.785574] ? security_mmap_addr+0x7d/0xa0 [ 33.786102] ? get_unmapped_area+0x1f5/0x3f0 [ 33.786649] do_mmap+0x854/0xf00 [ 33.787087] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.787580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.788138] ksys_mmap_pgoff+0x3af/0x500 [ 33.788649] do_syscall_64+0x3f/0x90 [ 33.789122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.789762] RIP: 0033:0x7f5423f38d82 [ 33.790224] 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 [ 33.792337] RSP: 002b:00007fff9070b718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.793255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5423f38d82 [ 33.794098] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5423372000 [ 33.794951] RBP: 00007f5423372000 R08: 0000000000000009 R09: 0000000000001000 [ 33.795797] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adcce58ec0 [ 33.796644] R13: 00007fff9070b730 R14: 00007fff9070b760 R15: 00007fff9070bac0 [ 33.797498] [ 33.797785] [ 33.798003] Allocated by task 214: [ 33.798426] kasan_save_stack+0x22/0x50 [ 33.798936] kasan_set_track+0x25/0x30 [ 33.799426] __kasan_slab_alloc+0x59/0x70 [ 33.799956] kmem_cache_alloc+0x16b/0x370 [ 33.800473] vm_area_dup+0x20/0x160 [ 33.800942] __split_vma+0x170/0x950 [ 33.801412] split_vma+0xc6/0x110 [ 33.801853] mprotect_fixup+0x8d2/0xb30 [ 33.802355] do_mprotect_pkey+0x87e/0xd40 [ 33.802880] __x64_sys_mprotect+0x78/0xc0 [ 33.803403] do_syscall_64+0x3f/0x90 [ 33.803876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.804517] [ 33.804743] Freed by task 214: [ 33.805135] kasan_save_stack+0x22/0x50 [ 33.805633] kasan_set_track+0x25/0x30 [ 33.806130] kasan_save_free_info+0x2b/0x50 [ 33.806664] __kasan_slab_free+0x10a/0x190 [ 33.807199] kmem_cache_free+0x10d/0x4d0 [ 33.807717] rcu_core+0x8c8/0x2860 [ 33.808168] __do_softirq+0x1b7/0x7d4 [ 33.808664] [ 33.808884] Last potentially related work creation: [ 33.809478] kasan_save_stack+0x22/0x50 [ 33.809993] __kasan_record_aux_stack+0x8e/0xa0 [ 33.810561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.811215] remove_vma+0x139/0x170 [ 33.811666] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.812225] do_vmi_munmap+0x1f1/0x2b0 [ 33.812726] __vm_munmap+0x138/0x3a0 [ 33.813210] __x64_sys_munmap+0x59/0x80 [ 33.813713] do_syscall_64+0x3f/0x90 [ 33.814193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.814849] [ 33.815064] The buggy address belongs to the object at ffff88800ea34740 [ 33.815064] which belongs to the cache vm_area_struct of size 168 [ 33.816545] The buggy address is located 88 bytes inside of [ 33.816545] freed 168-byte region [ffff88800ea34740, ffff88800ea347e8) [ 33.817985] [ 33.818204] The buggy address belongs to the physical page: [ 33.818862] page:00000000a985462d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea34 [ 33.819937] memcg:ffff88800d664d01 [ 33.820363] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.821063] page_type: 0xffffffff() [ 33.821510] raw: 0100000000000200 ffff88800879fc80 ffffea00005ddac0 dead000000000005 [ 33.822421] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d664d01 [ 33.823323] page dumped because: kasan: bad access detected [ 33.824005] [ 33.824221] Memory state around the buggy address: [ 33.824806] ffff88800ea34680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.825653] ffff88800ea34700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.826490] >ffff88800ea34780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.827334] ^ [ 33.827826] ffff88800ea34800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.828697] ffff88800ea34880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.829537] ================================================================== [ 33.830755] Disabling lock debugging due to kernel taint [ 36.162986] BUG: Bad rss-counter state mm:0000000074385038 type:MM_FILEPAGES val:33 [ 36.164163] BUG: Bad rss-counter state mm:0000000074385038 type:MM_ANONPAGES val:22 [ 36.535832] BUG: Bad rss-counter state mm:0000000007b3607c type:MM_FILEPAGES val:33 [ 36.537487] BUG: Bad rss-counter state mm:0000000007b3607c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3564' (ECDSA) to the list of known hosts. 2023/06/20 04:49:30 fuzzer started 2023/06/20 04:49:30 dialing manager at localhost:44161 2023/06/20 04:49:30 checking machine... 2023/06/20 04:49:30 checking revisions... [ 37.327051] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:49:30 testing simple program... [ 37.378305] cgroup: Unknown subsys name 'net' [ 37.413212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:49:27 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000b0030b2b RCX=ffff88806c585958 RDX=0000000000000009 RSI=0000000000000003 RDI=0000000070ec949c RBP=ffff8880101cc1c0 RSP=ffff888016557b70 R8 =00000000ae2d0065 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff888016557bd8 R15=0000000000000009 RIP=ffffffff82270f2d 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 00007f715715e900 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=00007ffe0732c000 CR3=000000000f010000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f04ab7e1a20 CR3=000000000f362000 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=af23dcef8e161e90584a27a063f0623d XMM02=000000000011cdb8eff9b2d0a8fce9cb XMM03=000000000011ce882c67c8bc2e329bc3 XMM04=8e5e8410c19e358100000000000ae988 XMM05=e4cb8bb95a7664b60000000000134260 XMM06=cb830a1d4820601f00000000001330c8 XMM07=e042d86d42eb936e0000000000124950 XMM08=563eeb8c37467b8d000000000011ce88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000