syzkaller login: [ 30.584640] BUG: Bad rss-counter state mm:000000008bfae88f type:MM_FILEPAGES val:33 [ 30.586975] BUG: Bad rss-counter state mm:000000008bfae88f type:MM_ANONPAGES val:22 [ 30.706076] ================================================================== [ 30.707181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.707973] Read of size 8 at addr ffff8880183076b0 by task sshd/220 [ 30.708660] [ 30.708826] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.709473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.710219] Call Trace: [ 30.710516] [ 30.710732] dump_stack_lvl+0x91/0xf0 [ 30.711103] print_report+0xcc/0x620 [ 30.711467] ? __virt_addr_valid+0x102/0x340 [ 30.711889] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712355] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712823] kasan_report+0xbe/0xf0 [ 30.713188] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.713668] vma_interval_tree_remove+0xc75/0xec0 [ 30.714121] vma_prepare+0xc54/0x11a0 [ 30.714511] __split_vma+0x5af/0x950 [ 30.714871] ? __pfx___split_vma+0x10/0x10 [ 30.715276] ? find_held_lock+0x2c/0x110 [ 30.715676] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.716104] ? lock_is_held_type+0x9f/0x120 [ 30.716526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.716993] ? mtree_range_walk+0x632/0x900 [ 30.717421] ? mas_walk+0x5c7/0x7c0 [ 30.717790] do_vmi_munmap+0x1f1/0x2b0 [ 30.718166] mmap_region+0x1f9/0x2660 [ 30.718561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.718956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.719488] ? __pfx_lock_acquire+0x10/0x10 [ 30.719788] ? __pfx_mmap_region+0x10/0x10 [ 30.720092] ? security_mmap_addr+0x7d/0xa0 [ 30.720385] ? get_unmapped_area+0x1f5/0x3f0 [ 30.720694] do_mmap+0x854/0xf00 [ 30.720944] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.721222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.721539] ksys_mmap_pgoff+0x3af/0x500 [ 30.721822] do_syscall_64+0x3f/0x90 [ 30.722088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.722463] RIP: 0033:0x7fe65c89ad82 [ 30.722714] 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 [ 30.723900] RSP: 002b:00007ffec62ff7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.724399] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe65c89ad82 [ 30.724871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe65bcd4000 [ 30.725352] RBP: 00007fe65bcd4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.725825] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4ed3e9ec0 [ 30.726295] R13: 00007ffec62ff7d0 R14: 00007ffec62ff800 R15: 00007ffec62ffb60 [ 30.726780] [ 30.726942] [ 30.727064] Allocated by task 213: [ 30.727305] kasan_save_stack+0x22/0x50 [ 30.727598] kasan_set_track+0x25/0x30 [ 30.727870] __kasan_slab_alloc+0x59/0x70 [ 30.728162] kmem_cache_alloc+0x16b/0x370 [ 30.728450] vm_area_dup+0x20/0x160 [ 30.728700] __split_vma+0x170/0x950 [ 30.728956] split_vma+0xc6/0x110 [ 30.729196] mprotect_fixup+0x8d2/0xb30 [ 30.729470] do_mprotect_pkey+0x87e/0xd40 [ 30.729755] __x64_sys_mprotect+0x78/0xc0 [ 30.730044] do_syscall_64+0x3f/0x90 [ 30.730311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.730683] [ 30.730806] Freed by task 203: [ 30.731022] kasan_save_stack+0x22/0x50 [ 30.731299] kasan_set_track+0x25/0x30 [ 30.731570] kasan_save_free_info+0x2b/0x50 [ 30.731871] __kasan_slab_free+0x10a/0x190 [ 30.732165] kmem_cache_free+0x10d/0x4d0 [ 30.732447] rcu_core+0x8c8/0x2860 [ 30.732701] __do_softirq+0x1b7/0x7d4 [ 30.732967] [ 30.733087] Last potentially related work creation: [ 30.733414] kasan_save_stack+0x22/0x50 [ 30.733713] __kasan_record_aux_stack+0x8e/0xa0 [ 30.734054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.734445] remove_vma+0x139/0x170 [ 30.734735] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.735042] do_vmi_munmap+0x1f1/0x2b0 [ 30.735317] __vm_munmap+0x138/0x3a0 [ 30.735569] __x64_sys_munmap+0x59/0x80 [ 30.735842] do_syscall_64+0x3f/0x90 [ 30.736096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.736440] [ 30.736557] The buggy address belongs to the object at ffff888018307658 [ 30.736557] which belongs to the cache vm_area_struct of size 168 [ 30.737371] The buggy address is located 88 bytes inside of [ 30.737371] freed 168-byte region [ffff888018307658, ffff888018307700) [ 30.738147] [ 30.738268] The buggy address belongs to the physical page: [ 30.738638] page:00000000e428d898 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18307 [ 30.739235] memcg:ffff888014305e01 [ 30.739466] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.739825] page_type: 0xffffffff() [ 30.740077] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.740591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014305e01 [ 30.741084] page dumped because: kasan: bad access detected [ 30.741451] [ 30.741568] Memory state around the buggy address: [ 30.741888] ffff888018307580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.742354] ffff888018307600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.742844] >ffff888018307680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.743309] ^ [ 30.743636] ffff888018307700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.744112] ffff888018307780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.744589] ================================================================== [ 30.745258] Disabling lock debugging due to kernel taint [ 32.651623] BUG: Bad rss-counter state mm:00000000ff7f0f5d type:MM_FILEPAGES val:33 [ 32.652641] BUG: Bad rss-counter state mm:00000000ff7f0f5d type:MM_ANONPAGES val:22 [ 33.242472] BUG: Bad rss-counter state mm:00000000e8f24014 type:MM_FILEPAGES val:33 [ 33.243651] BUG: Bad rss-counter state mm:00000000e8f24014 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45007' (ECDSA) to the list of known hosts. 2023/06/20 23:19:56 fuzzer started 2023/06/20 23:19:56 dialing manager at localhost:36067 2023/06/20 23:19:57 checking machine... 2023/06/20 23:19:57 checking revisions... [ 33.884278] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:19:57 testing simple program... [ 33.933060] cgroup: Unknown subsys name 'net' [ 33.986377] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:19:56 Registers: info registers vcpu 0 RAX=ffffffff818080db RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002ddfe9a RSI=ffff888016eff880 RDI=ffffffff818080db RBP=ffff888016eff510 RSP=ffff888016eff478 R8 =0000000000000001 R9 =ffff888016eff4b8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff888016eff540 R13=0000000000000000 R14=ffff8880101c8000 R15=0000000000092c40 RIP=ffffffff810bd06d 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 00007f66e1fea700 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=00007ffb8079d0b0 CR3=000000001a07c000 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=2036353a39313a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a39313a3332203032 XMM08=3d656e696c646d632022656369767265 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=00007f42f58ef000 CR3=000000000cbc4000 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=e45e9e80b81545ab8645ae8443518602 XMM02=2c67c8bc2e329bc3000000000011a218 XMM03=fb795ef6d65770560000000000121b60 XMM04=fea03e596af83e2200000000000ae988 XMM05=19e9129bd510f2350000000000131a30 XMM06=4fda316b135da52b00000000001318b8 XMM07=e042d86d42eb936e0000000000121de0 XMM08=a325251056ed95b8000000000011a278 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000