syzkaller login: [ 30.519543] BUG: Bad rss-counter state mm:0000000035aa755c type:MM_FILEPAGES val:33 [ 30.520520] BUG: Bad rss-counter state mm:0000000035aa755c type:MM_ANONPAGES val:22 [ 30.680067] ================================================================== [ 30.680987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.681929] Read of size 8 at addr ffff88800f276ed8 by task sshd/220 [ 30.682697] [ 30.682914] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.683939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.684916] Call Trace: [ 30.685234] [ 30.685513] dump_stack_lvl+0x91/0xf0 [ 30.686007] print_report+0xcc/0x620 [ 30.686523] ? __virt_addr_valid+0x102/0x340 [ 30.687066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.687678] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.688290] kasan_report+0xbe/0xf0 [ 30.688760] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.689377] vma_interval_tree_remove+0xc75/0xec0 [ 30.689971] vma_prepare+0xc54/0x11a0 [ 30.690460] __split_vma+0x5af/0x950 [ 30.690924] ? __pfx___split_vma+0x10/0x10 [ 30.691457] ? find_held_lock+0x2c/0x110 [ 30.691982] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.692534] ? lock_is_held_type+0x9f/0x120 [ 30.693063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.693665] ? mtree_range_walk+0x632/0x900 [ 30.694223] ? mas_walk+0x5c7/0x7c0 [ 30.694704] do_vmi_munmap+0x1f1/0x2b0 [ 30.695196] mmap_region+0x1f9/0x2660 [ 30.695674] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.696191] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.696909] ? __pfx_lock_acquire+0x10/0x10 [ 30.697437] ? __pfx_mmap_region+0x10/0x10 [ 30.697956] ? security_mmap_addr+0x7d/0xa0 [ 30.698506] ? get_unmapped_area+0x1f5/0x3f0 [ 30.699066] do_mmap+0x854/0xf00 [ 30.699499] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.699991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.700545] ksys_mmap_pgoff+0x3af/0x500 [ 30.701053] do_syscall_64+0x3f/0x90 [ 30.701526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.702186] RIP: 0033:0x7fac64e48d82 [ 30.702630] 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 [ 30.704746] RSP: 002b:00007fffb01de8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.705634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac64e48d82 [ 30.706486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac64282000 [ 30.707340] RBP: 00007fac64282000 R08: 0000000000000009 R09: 0000000000001000 [ 30.708175] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560884593ec0 [ 30.709000] R13: 00007fffb01de8d0 R14: 00007fffb01de900 R15: 00007fffb01dec60 [ 30.709854] [ 30.710161] [ 30.710379] Allocated by task 213: [ 30.710814] kasan_save_stack+0x22/0x50 [ 30.711315] kasan_set_track+0x25/0x30 [ 30.711806] __kasan_slab_alloc+0x59/0x70 [ 30.712326] kmem_cache_alloc+0x16b/0x370 [ 30.712840] vm_area_dup+0x20/0x160 [ 30.713288] __split_vma+0x170/0x950 [ 30.713756] split_vma+0xc6/0x110 [ 30.714203] mprotect_fixup+0x8d2/0xb30 [ 30.714697] do_mprotect_pkey+0x87e/0xd40 [ 30.715215] __x64_sys_mprotect+0x78/0xc0 [ 30.715726] do_syscall_64+0x3f/0x90 [ 30.716193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.716826] [ 30.717036] Freed by task 213: [ 30.717423] kasan_save_stack+0x22/0x50 [ 30.717920] kasan_set_track+0x25/0x30 [ 30.718417] kasan_save_free_info+0x2b/0x50 [ 30.718947] __kasan_slab_free+0x10a/0x190 [ 30.719464] kmem_cache_free+0x10d/0x4d0 [ 30.719972] rcu_core+0x8c8/0x2860 [ 30.720418] __do_softirq+0x1b7/0x7d4 [ 30.720887] [ 30.721098] Last potentially related work creation: [ 30.721679] kasan_save_stack+0x22/0x50 [ 30.722199] __kasan_record_aux_stack+0x8e/0xa0 [ 30.722765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.723399] remove_vma+0x139/0x170 [ 30.723848] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.724399] do_vmi_munmap+0x1f1/0x2b0 [ 30.724977] __vm_munmap+0x138/0x3a0 [ 30.725439] __x64_sys_munmap+0x59/0x80 [ 30.725921] do_syscall_64+0x3f/0x90 [ 30.726403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.727031] [ 30.727247] Second to last potentially related work creation: [ 30.727924] kasan_save_stack+0x22/0x50 [ 30.728427] __kasan_record_aux_stack+0x8e/0xa0 [ 30.728984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.729614] remove_vma+0x139/0x170 [ 30.730081] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.730638] do_vmi_munmap+0x1f1/0x2b0 [ 30.731118] mmap_region+0x1f9/0x2660 [ 30.731590] do_mmap+0x854/0xf00 [ 30.732010] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.732487] ksys_mmap_pgoff+0x3af/0x500 [ 30.732979] do_syscall_64+0x3f/0x90 [ 30.733443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.734088] [ 30.734299] The buggy address belongs to the object at ffff88800f276e80 [ 30.734299] which belongs to the cache vm_area_struct of size 168 [ 30.735724] The buggy address is located 88 bytes inside of [ 30.735724] freed 168-byte region [ffff88800f276e80, ffff88800f276f28) [ 30.737113] [ 30.737327] The buggy address belongs to the physical page: [ 30.737972] page:00000000a8897d0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf276 [ 30.739038] memcg:ffff88800904da01 [ 30.739461] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.740141] page_type: 0xffffffff() [ 30.740588] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.741491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800904da01 [ 30.742405] page dumped because: kasan: bad access detected [ 30.743063] [ 30.743277] Memory state around the buggy address: [ 30.743851] ffff88800f276d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.744690] ffff88800f276e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.745529] >ffff88800f276e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.746382] ^ [ 30.747101] ffff88800f276f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.747952] ffff88800f276f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.748799] ================================================================== [ 30.749722] Disabling lock debugging due to kernel taint [ 32.665066] BUG: Bad rss-counter state mm:00000000c47cf654 type:MM_FILEPAGES val:33 [ 32.666510] BUG: Bad rss-counter state mm:00000000c47cf654 type:MM_ANONPAGES val:22 [ 33.212191] BUG: Bad rss-counter state mm:0000000095aa1b54 type:MM_FILEPAGES val:33 [ 33.213375] BUG: Bad rss-counter state mm:0000000095aa1b54 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2876' (ECDSA) to the list of known hosts. 2023/06/21 05:44:22 fuzzer started 2023/06/21 05:44:22 dialing manager at localhost:36067 2023/06/21 05:44:22 checking machine... 2023/06/21 05:44:22 checking revisions... [ 33.861133] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:44:22 testing simple program... [ 33.911077] cgroup: Unknown subsys name 'net' [ 33.963492] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:44:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ea9b980 RCX=ffff88800ea9b980 RDX=00000000000d0009 RSI=ffff88800ea9b980 RDI=ffff88800844f780 RBP=ffff88801cde7c88 RSP=ffff88801cde7bf0 R8 =00000000000d0008 R9 =0000000000000000 R10=ffffea00003aa6c0 R11=00000000000d0009 R12=ffffea00003aa6c0 R13=ffff88800ea9bbe0 R14=00000000000d0008 R15=ffff88800844f780 RIP=ffffffff81809672 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 00007f9672480900 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=00007f9672a380b0 CR3=00000000182ce000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000fffffffe RCX=ffffffff818a83ba RDX=ffff888015d28000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888015e05520 RSP=ffff888015cc7b08 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffe R11=00000000000b6a61 R12=ffff888015cc7c48 R13=dffffc0000000000 R14=0000000000000001 R15=ffff888015cc7df0 RIP=ffffffff814c0860 RFL=00000282 [--S----] 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 00007f57cd0f6900 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=00007f57cc5244d0 CR3=000000000cd62000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9beb2ff5f7f1c7ee00000000000ae988 XMM05=fbb4aacadbf44b750000000000134238 XMM06=4fda316b135da52b0000000000133028 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000