syzkaller login: [ 33.291477] BUG: Bad rss-counter state mm:0000000085c42dc4 type:MM_FILEPAGES val:33 [ 33.292682] BUG: Bad rss-counter state mm:0000000085c42dc4 type:MM_ANONPAGES val:22 [ 33.443652] ================================================================== [ 33.444563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.445496] Read of size 8 at addr ffff8880168a3c20 by task sshd/220 [ 33.446262] [ 33.446481] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.447462] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.448445] Call Trace: [ 33.448769] [ 33.449053] dump_stack_lvl+0x91/0xf0 [ 33.449569] print_report+0xcc/0x620 [ 33.450059] ? __virt_addr_valid+0x102/0x340 [ 33.450628] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.451244] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.451890] kasan_report+0xbe/0xf0 [ 33.452366] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.452989] vma_interval_tree_remove+0xc75/0xec0 [ 33.453602] vma_prepare+0xc54/0x11a0 [ 33.454090] __split_vma+0x5af/0x950 [ 33.454570] ? __pfx___split_vma+0x10/0x10 [ 33.455104] ? find_held_lock+0x2c/0x110 [ 33.455634] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.456197] ? lock_is_held_type+0x9f/0x120 [ 33.456731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.457338] ? mtree_range_walk+0x632/0x900 [ 33.457883] ? mas_walk+0x5c7/0x7c0 [ 33.458356] do_vmi_munmap+0x1f1/0x2b0 [ 33.458845] mmap_region+0x1f9/0x2660 [ 33.459334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.459857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.460579] ? __pfx_lock_acquire+0x10/0x10 [ 33.461118] ? __pfx_mmap_region+0x10/0x10 [ 33.461651] ? security_mmap_addr+0x7d/0xa0 [ 33.462178] ? get_unmapped_area+0x1f5/0x3f0 [ 33.462730] do_mmap+0x854/0xf00 [ 33.463177] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.463685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.464251] ksys_mmap_pgoff+0x3af/0x500 [ 33.464755] do_syscall_64+0x3f/0x90 [ 33.465229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.465866] RIP: 0033:0x7f03f6427d82 [ 33.466321] 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 [ 33.468435] RSP: 002b:00007ffd49d43188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.469332] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03f6427d82 [ 33.470174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03f5861000 [ 33.471022] RBP: 00007f03f5861000 R08: 0000000000000009 R09: 0000000000001000 [ 33.471869] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d937bff70 [ 33.472705] R13: 00007ffd49d431a0 R14: 00007ffd49d431d0 R15: 00007ffd49d43530 [ 33.473554] [ 33.473851] [ 33.474064] Allocated by task 213: [ 33.474492] kasan_save_stack+0x22/0x50 [ 33.474992] kasan_set_track+0x25/0x30 [ 33.475504] __kasan_slab_alloc+0x59/0x70 [ 33.476025] kmem_cache_alloc+0x16b/0x370 [ 33.476540] vm_area_dup+0x20/0x160 [ 33.476992] __split_vma+0x170/0x950 [ 33.477464] split_vma+0xc6/0x110 [ 33.477906] mprotect_fixup+0x8d2/0xb30 [ 33.478408] do_mprotect_pkey+0x87e/0xd40 [ 33.478939] __x64_sys_mprotect+0x78/0xc0 [ 33.479464] do_syscall_64+0x3f/0x90 [ 33.479944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.480593] [ 33.480811] Freed by task 213: [ 33.481215] kasan_save_stack+0x22/0x50 [ 33.481719] kasan_set_track+0x25/0x30 [ 33.482231] kasan_save_free_info+0x2b/0x50 [ 33.482765] __kasan_slab_free+0x10a/0x190 [ 33.483294] kmem_cache_free+0x10d/0x4d0 [ 33.483821] rcu_core+0x8c8/0x2860 [ 33.484274] __do_softirq+0x1b7/0x7d4 [ 33.484747] [ 33.484963] Last potentially related work creation: [ 33.485551] kasan_save_stack+0x22/0x50 [ 33.486054] __kasan_record_aux_stack+0x8e/0xa0 [ 33.486641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.487281] remove_vma+0x139/0x170 [ 33.487740] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.488313] do_vmi_munmap+0x1f1/0x2b0 [ 33.488807] __vm_munmap+0x138/0x3a0 [ 33.489284] __x64_sys_munmap+0x59/0x80 [ 33.489789] do_syscall_64+0x3f/0x90 [ 33.490279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.490932] [ 33.491156] The buggy address belongs to the object at ffff8880168a3bc8 [ 33.491156] which belongs to the cache vm_area_struct of size 168 [ 33.492655] The buggy address is located 88 bytes inside of [ 33.492655] freed 168-byte region [ffff8880168a3bc8, ffff8880168a3c70) [ 33.494089] [ 33.494308] The buggy address belongs to the physical page: [ 33.494973] page:000000005c4b00be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168a3 [ 33.496095] memcg:ffff888018e67e01 [ 33.496532] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.497203] page_type: 0xffffffff() [ 33.497658] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.498599] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e67e01 [ 33.499539] page dumped because: kasan: bad access detected [ 33.500191] [ 33.500412] Memory state around the buggy address: [ 33.500991] ffff8880168a3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.501855] ffff8880168a3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.502714] >ffff8880168a3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.503594] ^ [ 33.504141] ffff8880168a3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.505017] ffff8880168a3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.505883] ================================================================== [ 33.506867] Disabling lock debugging due to kernel taint [ 35.255833] BUG: Bad rss-counter state mm:0000000069f5e09f type:MM_FILEPAGES val:33 [ 35.256725] BUG: Bad rss-counter state mm:0000000069f5e09f type:MM_ANONPAGES val:22 [ 35.618690] BUG: Bad rss-counter state mm:000000005dfb2ffb type:MM_FILEPAGES val:33 [ 35.619512] BUG: Bad rss-counter state mm:000000005dfb2ffb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16938' (ECDSA) to the list of known hosts. 2023/06/20 07:13:55 fuzzer started 2023/06/20 07:13:56 dialing manager at localhost:44161 2023/06/20 07:13:56 checking machine... 2023/06/20 07:13:56 checking revisions... [ 36.328769] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:13:56 testing simple program... [ 36.374632] cgroup: Unknown subsys name 'net' [ 36.415087] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:13:53 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002b3eea9 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff8880159f7528 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b8ec 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 00007f9ecdfda900 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=0000560937630b88 CR3=00000000177ac000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f35fa28fac0 CR3=00000000177a8000 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=2035353a33313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a33313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000