syzkaller login: [ 31.920925] BUG: Bad rss-counter state mm:000000003b6a1375 type:MM_FILEPAGES val:33 [ 31.922332] BUG: Bad rss-counter state mm:000000003b6a1375 type:MM_ANONPAGES val:22 [ 32.054804] ================================================================== [ 32.055753] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.056857] Read of size 8 at addr ffff8880103d64e0 by task sshd/219 [ 32.057659] [ 32.057889] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.058798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.059816] Call Trace: [ 32.060170] [ 32.060473] dump_stack_lvl+0x91/0xf0 [ 32.060987] print_report+0xcc/0x620 [ 32.061493] ? __virt_addr_valid+0x102/0x340 [ 32.062073] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.062715] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.063385] kasan_report+0xbe/0xf0 [ 32.063884] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.064566] vma_interval_tree_remove+0xc75/0xec0 [ 32.065200] vma_prepare+0xc54/0x11a0 [ 32.065707] __split_vma+0x5af/0x950 [ 32.066210] ? __pfx___split_vma+0x10/0x10 [ 32.066766] ? find_held_lock+0x2c/0x110 [ 32.067326] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.067924] ? lock_is_held_type+0x9f/0x120 [ 32.068509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.069150] ? mtree_range_walk+0x632/0x900 [ 32.069740] ? mas_walk+0x5c7/0x7c0 [ 32.070245] do_vmi_munmap+0x1f1/0x2b0 [ 32.070760] mmap_region+0x1f9/0x2660 [ 32.071265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.071803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.072579] ? __pfx_lock_acquire+0x10/0x10 [ 32.073151] ? __pfx_mmap_region+0x10/0x10 [ 32.073726] ? security_mmap_addr+0x7d/0xa0 [ 32.074298] ? get_unmapped_area+0x1f5/0x3f0 [ 32.074891] do_mmap+0x854/0xf00 [ 32.075364] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.075891] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.076499] ksys_mmap_pgoff+0x3af/0x500 [ 32.077041] do_syscall_64+0x3f/0x90 [ 32.077556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.078253] RIP: 0033:0x7f59a4e52d82 [ 32.078745] 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 [ 32.081164] RSP: 002b:00007ffe0f823f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.082119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59a4e52d82 [ 32.083018] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59a428c000 [ 32.083933] RBP: 00007f59a428c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.084842] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583ddc20d90 [ 32.085753] R13: 00007ffe0f823f60 R14: 00007ffe0f823f90 R15: 00007ffe0f8242f0 [ 32.086667] [ 32.086981] [ 32.087209] Allocated by task 212: [ 32.087674] kasan_save_stack+0x22/0x50 [ 32.088220] kasan_set_track+0x25/0x30 [ 32.088741] __kasan_slab_alloc+0x59/0x70 [ 32.089298] kmem_cache_alloc+0x16b/0x370 [ 32.089843] vm_area_dup+0x20/0x160 [ 32.090319] __split_vma+0x170/0x950 [ 32.090815] split_vma+0xc6/0x110 [ 32.091277] mprotect_fixup+0x8d2/0xb30 [ 32.091802] do_mprotect_pkey+0x87e/0xd40 [ 32.092378] __x64_sys_mprotect+0x78/0xc0 [ 32.092925] do_syscall_64+0x3f/0x90 [ 32.093429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.094119] [ 32.094351] Freed by task 212: [ 32.094766] kasan_save_stack+0x22/0x50 [ 32.095306] kasan_set_track+0x25/0x30 [ 32.095837] kasan_save_free_info+0x2b/0x50 [ 32.096421] __kasan_slab_free+0x10a/0x190 [ 32.096991] kmem_cache_free+0x10d/0x4d0 [ 32.097532] rcu_core+0x8c8/0x2860 [ 32.098011] __do_softirq+0x1b7/0x7d4 [ 32.098523] [ 32.098752] Last potentially related work creation: [ 32.099383] kasan_save_stack+0x22/0x50 [ 32.099927] __kasan_record_aux_stack+0x8e/0xa0 [ 32.100545] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.101235] remove_vma+0x139/0x170 [ 32.101720] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.102319] do_vmi_munmap+0x1f1/0x2b0 [ 32.102841] __vm_munmap+0x138/0x3a0 [ 32.103344] __x64_sys_munmap+0x59/0x80 [ 32.103882] do_syscall_64+0x3f/0x90 [ 32.104402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.105094] [ 32.105326] The buggy address belongs to the object at ffff8880103d6488 [ 32.105326] which belongs to the cache vm_area_struct of size 168 [ 32.106881] The buggy address is located 88 bytes inside of [ 32.106881] freed 168-byte region [ffff8880103d6488, ffff8880103d6530) [ 32.108369] [ 32.108601] The buggy address belongs to the physical page: [ 32.109309] page:0000000033dd144f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103d6 [ 32.110485] memcg:ffff8880165dca01 [ 32.110944] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.111628] page_type: 0xffffffff() [ 32.112131] raw: 0100000000000200 ffff88800879fc80 ffffea0000353e00 dead00000000000c [ 32.113100] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165dca01 [ 32.114065] page dumped because: kasan: bad access detected [ 32.114786] [ 32.115018] Memory state around the buggy address: [ 32.115642] ffff8880103d6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.116563] ffff8880103d6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.117491] >ffff8880103d6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.118411] ^ [ 32.119218] ffff8880103d6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 32.120145] ffff8880103d6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.121042] ================================================================== [ 32.122370] Disabling lock debugging due to kernel taint [ 34.412282] BUG: Bad rss-counter state mm:000000003f0058a1 type:MM_FILEPAGES val:33 [ 34.413281] BUG: Bad rss-counter state mm:000000003f0058a1 type:MM_ANONPAGES val:22 [ 34.849761] BUG: Bad rss-counter state mm:000000000062acec type:MM_FILEPAGES val:33 [ 34.850994] BUG: Bad rss-counter state mm:000000000062acec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13464' (ECDSA) to the list of known hosts. 2023/06/20 06:56:51 fuzzer started 2023/06/20 06:56:51 dialing manager at localhost:44161 2023/06/20 06:56:51 checking machine... 2023/06/20 06:56:51 checking revisions... [ 35.469017] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:56:51 testing simple program... [ 35.524736] cgroup: Unknown subsys name 'net' [ 35.582743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:56:49 Registers: info registers vcpu 0 RAX=ffffea000063b800 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff818060d2 RDI=0000000000000000 RBP=ffff88806ce3d150 RSP=ffff888009be77d0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000040003 R12=ffff888008442140 R13=ffffea000051e600 R14=ffff888008442140 R15=0000000000000001 RIP=ffffffff81806132 RFL=00000086 [--S--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 00007f19733b7900 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=00007f197396c650 CR3=00000000103f8000 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=ffffffff81b24200 RBX=ffffffff8493c2c0 RCX=0000000000000000 RDX=1ffffffff092785b RSI=ffffea00005e2c80 RDI=ffff8880163398a8 RBP=ffffea00005e2c80 RSP=ffff888015c07a70 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff8880163398a8 R13=ffffffff81b291d0 R14=0000000000800000 R15=0000000000032000 RIP=ffffffff81b24204 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffa7aea3900 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=00007ffa7a2bf050 CR3=000000000c6ec000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=02113f6bd6d3d46a00000000000ae988 XMM05=c9443f11995dd61d0000000000135698 XMM06=806171799158d9670000000000134488 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20000000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000