syzkaller login: [ 31.340792] BUG: Bad rss-counter state mm:0000000054599a98 type:MM_FILEPAGES val:33 [ 31.341747] BUG: Bad rss-counter state mm:0000000054599a98 type:MM_ANONPAGES val:22 [ 31.435409] ================================================================== [ 31.435915] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.436423] Read of size 8 at addr ffff88800eb406b0 by task sshd/220 [ 31.436832] [ 31.436951] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.437424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.437950] Call Trace: [ 31.438124] [ 31.438280] dump_stack_lvl+0x91/0xf0 [ 31.438545] print_report+0xcc/0x620 [ 31.438809] ? __virt_addr_valid+0x102/0x340 [ 31.439105] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.439446] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.439778] kasan_report+0xbe/0xf0 [ 31.440037] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.440372] vma_interval_tree_remove+0xc75/0xec0 [ 31.440852] vma_prepare+0xc54/0x11a0 [ 31.441171] __split_vma+0x5af/0x950 [ 31.441425] ? __pfx___split_vma+0x10/0x10 [ 31.441709] ? find_held_lock+0x2c/0x110 [ 31.441993] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.442295] ? lock_is_held_type+0x9f/0x120 [ 31.442585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.442909] ? mtree_range_walk+0x632/0x900 [ 31.443216] ? mas_walk+0x5c7/0x7c0 [ 31.443490] do_vmi_munmap+0x1f1/0x2b0 [ 31.443757] mmap_region+0x1f9/0x2660 [ 31.444026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.444303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.444690] ? __pfx_lock_acquire+0x10/0x10 [ 31.444975] ? __pfx_mmap_region+0x10/0x10 [ 31.445258] ? security_mmap_addr+0x7d/0xa0 [ 31.445569] ? get_unmapped_area+0x1f5/0x3f0 [ 31.445888] do_mmap+0x854/0xf00 [ 31.446145] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.446428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.446750] ksys_mmap_pgoff+0x3af/0x500 [ 31.447036] do_syscall_64+0x3f/0x90 [ 31.447314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.447691] RIP: 0033:0x7feb36bf5d82 [ 31.447948] 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 [ 31.449187] RSP: 002b:00007ffdb594dac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.449717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb36bf5d82 [ 31.450220] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb3602f000 [ 31.450710] RBP: 00007feb3602f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.451193] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612decc6f70 [ 31.451688] R13: 00007ffdb594dae0 R14: 00007ffdb594db10 R15: 00007ffdb594de70 [ 31.452182] [ 31.452348] [ 31.452470] Allocated by task 213: [ 31.452722] kasan_save_stack+0x22/0x50 [ 31.453021] kasan_set_track+0x25/0x30 [ 31.453314] __kasan_slab_alloc+0x59/0x70 [ 31.453622] kmem_cache_alloc+0x16b/0x370 [ 31.453922] vm_area_dup+0x20/0x160 [ 31.454187] __split_vma+0x170/0x950 [ 31.454453] split_vma+0xc6/0x110 [ 31.454707] mprotect_fixup+0x8d2/0xb30 [ 31.454999] do_mprotect_pkey+0x87e/0xd40 [ 31.455298] __x64_sys_mprotect+0x78/0xc0 [ 31.455605] do_syscall_64+0x3f/0x90 [ 31.455881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.456258] [ 31.456384] Freed by task 203: [ 31.456603] kasan_save_stack+0x22/0x50 [ 31.456886] kasan_set_track+0x25/0x30 [ 31.457168] kasan_save_free_info+0x2b/0x50 [ 31.457479] __kasan_slab_free+0x10a/0x190 [ 31.457784] kmem_cache_free+0x10d/0x4d0 [ 31.458078] rcu_core+0x8c8/0x2860 [ 31.458342] __do_softirq+0x1b7/0x7d4 [ 31.458619] [ 31.458738] Last potentially related work creation: [ 31.459085] kasan_save_stack+0x22/0x50 [ 31.459378] __kasan_record_aux_stack+0x8e/0xa0 [ 31.459705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.460082] remove_vma+0x139/0x170 [ 31.460343] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.460660] do_vmi_munmap+0x1f1/0x2b0 [ 31.460944] __vm_munmap+0x138/0x3a0 [ 31.461219] __x64_sys_munmap+0x59/0x80 [ 31.461501] do_syscall_64+0x3f/0x90 [ 31.461780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.462155] [ 31.462277] The buggy address belongs to the object at ffff88800eb40658 [ 31.462277] which belongs to the cache vm_area_struct of size 168 [ 31.463130] The buggy address is located 88 bytes inside of [ 31.463130] freed 168-byte region [ffff88800eb40658, ffff88800eb40700) [ 31.463953] [ 31.464077] The buggy address belongs to the physical page: [ 31.464460] page:000000008465a3e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb40 [ 31.465085] memcg:ffff888019fe8f01 [ 31.465333] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.465706] page_type: 0xffffffff() [ 31.465971] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.466499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fe8f01 [ 31.467021] page dumped because: kasan: bad access detected [ 31.467409] [ 31.467531] Memory state around the buggy address: [ 31.467875] ffff88800eb40580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.468370] ffff88800eb40600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.468865] >ffff88800eb40680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.469348] ^ [ 31.469697] ffff88800eb40700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.470189] ffff88800eb40780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.470675] ================================================================== [ 31.471213] Disabling lock debugging due to kernel taint [ 33.528047] BUG: Bad rss-counter state mm:000000008ecc0d72 type:MM_FILEPAGES val:33 [ 33.528549] BUG: Bad rss-counter state mm:000000008ecc0d72 type:MM_ANONPAGES val:22 [ 33.913708] BUG: Bad rss-counter state mm:00000000b3238f48 type:MM_FILEPAGES val:33 [ 33.914473] BUG: Bad rss-counter state mm:00000000b3238f48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24994' (ECDSA) to the list of known hosts. 2023/06/21 04:48:46 fuzzer started 2023/06/21 04:48:46 dialing manager at localhost:36067 2023/06/21 04:48:46 checking machine... 2023/06/21 04:48:46 checking revisions... [ 34.685751] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:48:46 testing simple program... [ 34.737044] cgroup: Unknown subsys name 'net' [ 34.783269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:48:45 Registers: info registers vcpu 0 RAX=1ffffffff0c09d7d RBX=ffffffff8604ebe8 RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff8880164bf618 R8 =ffffffff864b2008 R9 =ffff8880164bf710 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f9846f17900 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=00007ffd91e5e000 CR3=000000000f7b8000 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=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=00007fb59a048c60 CR3=000000000c626000 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=99d2c0b16695c588d743c6aad24c5df8 XMM02=000000000011a3a0eff9b2d0a8fce9cb XMM03=000000000011a4702c67c8bc2e329bc3 XMM04=4d328fdfc7316e4300000000000ae988 XMM05=19e9129bd510f2350000000000131640 XMM06=9e61df3a7841b0da00000000001304a8 XMM07=e042d86d42eb936e0000000000121af8 XMM08=5ff5d03037dbb2bd000000000011a470 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000