syzkaller login: [ 38.769565] BUG: Bad rss-counter state mm:00000000481197b6 type:MM_FILEPAGES val:33 [ 38.770891] BUG: Bad rss-counter state mm:00000000481197b6 type:MM_ANONPAGES val:22 [ 38.906124] ================================================================== [ 38.907245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.908377] Read of size 8 at addr ffff888019ba7140 by task sshd/219 [ 38.909613] [ 38.909872] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.910910] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.912219] Call Trace: [ 38.912629] <TASK> [ 38.912985] dump_stack_lvl+0x91/0xf0 [ 38.913620] print_report+0xcc/0x620 [ 38.914229] ? __virt_addr_valid+0x102/0x340 [ 38.914921] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915712] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916488] kasan_report+0xbe/0xf0 [ 38.917088] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917884] vma_interval_tree_remove+0xc75/0xec0 [ 38.918642] vma_prepare+0xc54/0x11a0 [ 38.919242] __split_vma+0x5af/0x950 [ 38.919836] ? __pfx___split_vma+0x10/0x10 [ 38.920505] ? find_held_lock+0x2c/0x110 [ 38.921161] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.921827] ? lock_is_held_type+0x9f/0x120 [ 38.922354] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.922948] ? mtree_range_walk+0x632/0x900 [ 38.923492] ? mas_walk+0x5c7/0x7c0 [ 38.923951] do_vmi_munmap+0x1f1/0x2b0 [ 38.924426] mmap_region+0x1f9/0x2660 [ 38.924903] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.925417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.926117] ? __pfx_lock_acquire+0x10/0x10 [ 38.926648] ? __pfx_mmap_region+0x10/0x10 [ 38.927154] ? security_mmap_addr+0x7d/0xa0 [ 38.927666] ? get_unmapped_area+0x1f5/0x3f0 [ 38.928199] do_mmap+0x854/0xf00 [ 38.928634] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.929121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.929691] ksys_mmap_pgoff+0x3af/0x500 [ 38.930192] do_syscall_64+0x3f/0x90 [ 38.930668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931286] RIP: 0033:0x7f20c2efad82 [ 38.931732] 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 [ 38.933866] RSP: 002b:00007ffd237a1298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20c2efad82 [ 38.935609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20c2334000 [ 38.936448] RBP: 00007f20c2334000 R08: 0000000000000009 R09: 0000000000001000 [ 38.937292] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2a007d980 [ 38.938143] R13: 00007ffd237a12b0 R14: 00007ffd237a12e0 R15: 00007ffd237a1640 [ 38.938978] </TASK> [ 38.939261] [ 38.939470] Allocated by task 212: [ 38.939886] kasan_save_stack+0x22/0x50 [ 38.940381] kasan_set_track+0x25/0x30 [ 38.940862] __kasan_slab_alloc+0x59/0x70 [ 38.941381] kmem_cache_alloc+0x16b/0x370 [ 38.941886] vm_area_dup+0x20/0x160 [ 38.942328] __split_vma+0x170/0x950 [ 38.942780] split_vma+0xc6/0x110 [ 38.943212] mprotect_fixup+0x8d2/0xb30 [ 38.943708] do_mprotect_pkey+0x87e/0xd40 [ 38.944221] __x64_sys_mprotect+0x78/0xc0 [ 38.944734] do_syscall_64+0x3f/0x90 [ 38.945195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945848] [ 38.946061] Freed by task 202: [ 38.946449] kasan_save_stack+0x22/0x50 [ 38.946952] kasan_set_track+0x25/0x30 [ 38.947436] kasan_save_free_info+0x2b/0x50 [ 38.947965] __kasan_slab_free+0x10a/0x190 [ 38.948494] kmem_cache_free+0x10d/0x4d0 [ 38.948997] rcu_core+0x8c8/0x2860 [ 38.949439] __do_softirq+0x1b7/0x7d4 [ 38.949909] [ 38.950121] Last potentially related work creation: [ 38.950698] kasan_save_stack+0x22/0x50 [ 38.951266] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952462] remove_vma+0x139/0x170 [ 38.952904] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953472] do_vmi_munmap+0x1f1/0x2b0 [ 38.953952] __vm_munmap+0x138/0x3a0 [ 38.954412] __x64_sys_munmap+0x59/0x80 [ 38.954898] do_syscall_64+0x3f/0x90 [ 38.955364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955994] [ 38.956205] The buggy address belongs to the object at ffff888019ba70e8 [ 38.956205] which belongs to the cache vm_area_struct of size 168 [ 38.957645] The buggy address is located 88 bytes inside of [ 38.957645] freed 168-byte region [ffff888019ba70e8, ffff888019ba7190) [ 38.959016] [ 38.959227] The buggy address belongs to the physical page: [ 38.959872] page:00000000b181aad0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ba7 [ 38.960946] memcg:ffff888019510101 [ 38.961377] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962008] page_type: 0xffffffff() [ 38.962450] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.963355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019510101 [ 38.964244] page dumped because: kasan: bad access detected [ 38.964891] [ 38.965104] Memory state around the buggy address: [ 38.965690] ffff888019ba7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.966526] ffff888019ba7080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.967368] >ffff888019ba7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.968206] ^ [ 38.968832] ffff888019ba7180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.969702] ffff888019ba7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.970536] ================================================================== [ 38.971540] Disabling lock debugging due to kernel taint [ 41.550185] BUG: Bad rss-counter state mm:00000000d36dddce type:MM_FILEPAGES val:33 [ 41.551359] BUG: Bad rss-counter state mm:00000000d36dddce type:MM_ANONPAGES val:22 [ 41.906786] BUG: Bad rss-counter state mm:00000000ae0a7be4 type:MM_FILEPAGES val:33 [ 41.907832] BUG: Bad rss-counter state mm:00000000ae0a7be4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1735' (ECDSA) to the list of known hosts. 2023/06/19 14:45:55 fuzzer started 2023/06/19 14:45:55 dialing manager at localhost:44161 2023/06/19 14:45:55 checking machine... 2023/06/19 14:45:55 checking revisions... [ 42.642138] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:45:55 testing simple program... [ 42.688826] cgroup: Unknown subsys name 'net' [ 42.730224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d7fa40 RCX=0000000000000001 RDX=1ffff110011aff49 RSI=ffffffff84531da7 RDI=ffff888008d7fa48 RBP=0000000000000006 RSP=ffff888008d7f958 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88801680aa00 RIP=ffffffff813ad485 RFL=00000287 [--S--PC] 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 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=00005645250bb318 CR3=000000000c6b2000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f8e73646be7 RCX=ffffffff81007b62 RDX=ffff888017db3680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800feff908 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800feffa50 R13=0000000000000000 R14=ffff888017db3680 R15=0000000000000cc0 RIP=ffffffff814c0245 RFL=00000293 [--S-A-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 00007f8e73164900 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=00007ffc0597f000 CR3=000000000c6b2000 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=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