syzkaller login: [ 33.649890] BUG: Bad rss-counter state mm:00000000052b1584 type:MM_FILEPAGES val:33 [ 33.651508] BUG: Bad rss-counter state mm:00000000052b1584 type:MM_ANONPAGES val:22 [ 33.816387] ================================================================== [ 33.817298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.818267] Read of size 8 at addr ffff88801a22b310 by task sshd/221 [ 33.819160] [ 33.819377] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.820238] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.821234] Call Trace: [ 33.821551] [ 33.821873] dump_stack_lvl+0x91/0xf0 [ 33.822373] print_report+0xcc/0x620 [ 33.822865] ? __virt_addr_valid+0x102/0x340 [ 33.823411] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.824037] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.824650] kasan_report+0xbe/0xf0 [ 33.825122] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.825747] vma_interval_tree_remove+0xc75/0xec0 [ 33.826347] vma_prepare+0xc54/0x11a0 [ 33.826834] __split_vma+0x5af/0x950 [ 33.827316] ? __pfx___split_vma+0x10/0x10 [ 33.827858] ? find_held_lock+0x2c/0x110 [ 33.828390] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.828960] ? lock_is_held_type+0x9f/0x120 [ 33.829496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.830116] ? mtree_range_walk+0x632/0x900 [ 33.830668] ? mas_walk+0x5c7/0x7c0 [ 33.831141] do_vmi_munmap+0x1f1/0x2b0 [ 33.831660] mmap_region+0x1f9/0x2660 [ 33.832139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.832652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.833357] ? __pfx_lock_acquire+0x10/0x10 [ 33.833927] ? __pfx_mmap_region+0x10/0x10 [ 33.834452] ? security_mmap_addr+0x7d/0xa0 [ 33.834993] ? get_unmapped_area+0x1f5/0x3f0 [ 33.835538] do_mmap+0x854/0xf00 [ 33.835975] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.836479] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.837042] ksys_mmap_pgoff+0x3af/0x500 [ 33.837549] do_syscall_64+0x3f/0x90 [ 33.838036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.838677] RIP: 0033:0x7fb3f2533d82 [ 33.839131] 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 [ 33.841257] RSP: 002b:00007ffecd3393d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.842171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3f2533d82 [ 33.843023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb3f196d000 [ 33.843866] RBP: 00007fb3f196d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.844708] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f4a79df60 [ 33.845588] R13: 00007ffecd3393f0 R14: 00007ffecd339420 R15: 00007ffecd339780 [ 33.846437] [ 33.846731] [ 33.846949] Allocated by task 214: [ 33.847374] kasan_save_stack+0x22/0x50 [ 33.847877] kasan_set_track+0x25/0x30 [ 33.848369] __kasan_slab_alloc+0x59/0x70 [ 33.848894] kmem_cache_alloc+0x16b/0x370 [ 33.849413] vm_area_dup+0x20/0x160 [ 33.849872] __split_vma+0x170/0x950 [ 33.850339] split_vma+0xc6/0x110 [ 33.850778] mprotect_fixup+0x8d2/0xb30 [ 33.851280] do_mprotect_pkey+0x87e/0xd40 [ 33.851799] __x64_sys_mprotect+0x78/0xc0 [ 33.852325] do_syscall_64+0x3f/0x90 [ 33.852809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.853454] [ 33.853676] Freed by task 214: [ 33.854066] kasan_save_stack+0x22/0x50 [ 33.854568] kasan_set_track+0x25/0x30 [ 33.855064] kasan_save_free_info+0x2b/0x50 [ 33.855593] __kasan_slab_free+0x10a/0x190 [ 33.856135] kmem_cache_free+0x10d/0x4d0 [ 33.856640] rcu_core+0x8c8/0x2860 [ 33.857082] __do_softirq+0x1b7/0x7d4 [ 33.857560] [ 33.857798] Last potentially related work creation: [ 33.858385] kasan_save_stack+0x22/0x50 [ 33.858892] __kasan_record_aux_stack+0x8e/0xa0 [ 33.859464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.860112] remove_vma+0x139/0x170 [ 33.860560] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.861115] do_vmi_munmap+0x1f1/0x2b0 [ 33.861605] __vm_munmap+0x138/0x3a0 [ 33.862070] __x64_sys_munmap+0x59/0x80 [ 33.862567] do_syscall_64+0x3f/0x90 [ 33.863051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.863699] [ 33.863917] The buggy address belongs to the object at ffff88801a22b2b8 [ 33.863917] which belongs to the cache vm_area_struct of size 168 [ 33.865430] The buggy address is located 88 bytes inside of [ 33.865430] freed 168-byte region [ffff88801a22b2b8, ffff88801a22b360) [ 33.866877] [ 33.867095] The buggy address belongs to the physical page: [ 33.867755] page:00000000923c1747 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a22b [ 33.868862] memcg:ffff88801834f801 [ 33.869320] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.869981] page_type: 0xffffffff() [ 33.870431] raw: 0100000000000200 ffff88800879fc80 ffffea00005b52c0 dead000000000004 [ 33.871340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801834f801 [ 33.872247] page dumped because: kasan: bad access detected [ 33.872903] [ 33.873120] Memory state around the buggy address: [ 33.873757] ffff88801a22b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.874617] ffff88801a22b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.875473] >ffff88801a22b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.876322] ^ [ 33.876788] ffff88801a22b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.877704] ffff88801a22b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.878552] ================================================================== [ 33.879533] Disabling lock debugging due to kernel taint [ 35.976866] BUG: Bad rss-counter state mm:0000000018934c4a type:MM_FILEPAGES val:33 [ 35.978590] BUG: Bad rss-counter state mm:0000000018934c4a type:MM_ANONPAGES val:22 [ 36.479855] BUG: Bad rss-counter state mm:00000000c398e774 type:MM_FILEPAGES val:33 [ 36.481156] BUG: Bad rss-counter state mm:00000000c398e774 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31438' (ECDSA) to the list of known hosts. 2023/06/19 14:38:56 fuzzer started 2023/06/19 14:38:56 dialing manager at localhost:44161 2023/06/19 14:38:56 checking machine... 2023/06/19 14:38:56 checking revisions... [ 37.218337] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:38:56 testing simple program... [ 37.257413] cgroup: Unknown subsys name 'net' [ 37.315216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:38:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f177566ed00 CR3=000000000d8a8000 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=2036353a38333a3431203931206e754a XMM01=6964206465766965636552203a5d3133 XMM02=6f63736964203a31313a323837393420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016e2f810 RCX=0000000000000001 RDX=1ffff11002dc5f03 RSI=ffffffff83639306 RDI=ffff888016e2f818 RBP=0000000000000006 RSP=ffff888016e2f728 R8 =0000000000000001 R9 =ffff888016e2f788 R10=0000000000038001 R11=0000000000091be7 R12=ffff888016e2f810 R13=0000000000000000 R14=ffff88800b80b680 R15=0000000000000cc0 RIP=ffffffff813ad46e 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 00007f71fe728900 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=00007f71fecdf618 CR3=000000000f312000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000