[ 34.302468] BUG: Bad rss-counter state mm:000000007c2ebc9b type:MM_FILEPAGES val:33 [ 34.303802] BUG: Bad rss-counter state mm:000000007c2ebc9b type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.473563] ================================================================== [ 34.474648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.475865] Read of size 8 at addr ffff88800bbd7968 by task sshd/218 [ 34.476710] [ 34.476947] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.477877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.478910] Call Trace: [ 34.479253] [ 34.479574] dump_stack_lvl+0x91/0xf0 [ 34.480096] print_report+0xcc/0x620 [ 34.480611] ? __virt_addr_valid+0x102/0x340 [ 34.481202] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.481857] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.482520] kasan_report+0xbe/0xf0 [ 34.483026] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.483695] vma_interval_tree_remove+0xc75/0xec0 [ 34.484344] vma_prepare+0xc54/0x11a0 [ 34.484859] __split_vma+0x5af/0x950 [ 34.485369] ? __pfx___split_vma+0x10/0x10 [ 34.485931] ? find_held_lock+0x2c/0x110 [ 34.486488] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.487096] ? lock_is_held_type+0x9f/0x120 [ 34.487696] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.488350] ? mtree_range_walk+0x632/0x900 [ 34.488939] ? mas_walk+0x5c7/0x7c0 [ 34.489446] do_vmi_munmap+0x1f1/0x2b0 [ 34.489972] mmap_region+0x1f9/0x2660 [ 34.490485] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.491031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.491807] ? __pfx_lock_acquire+0x10/0x10 [ 34.492383] ? __pfx_mmap_region+0x10/0x10 [ 34.492946] ? security_mmap_addr+0x7d/0xa0 [ 34.493515] ? get_unmapped_area+0x1f5/0x3f0 [ 34.494098] do_mmap+0x854/0xf00 [ 34.494565] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.495095] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.495709] ksys_mmap_pgoff+0x3af/0x500 [ 34.496250] do_syscall_64+0x3f/0x90 [ 34.496761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.497450] RIP: 0033:0x7f99b7d0ed82 [ 34.497939] 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 [ 34.500210] RSP: 002b:00007ffcfaa65198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.501174] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99b7d0ed82 [ 34.502081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99b7148000 [ 34.502979] RBP: 00007f99b7148000 R08: 0000000000000009 R09: 0000000000001000 [ 34.503899] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f7a728ec0 [ 34.504808] R13: 00007ffcfaa651b0 R14: 00007ffcfaa651e0 R15: 00007ffcfaa65540 [ 34.505723] [ 34.506033] [ 34.506266] Allocated by task 211: [ 34.506723] kasan_save_stack+0x22/0x50 [ 34.507261] kasan_set_track+0x25/0x30 [ 34.507811] __kasan_slab_alloc+0x59/0x70 [ 34.508369] kmem_cache_alloc+0x16b/0x370 [ 34.508925] vm_area_dup+0x20/0x160 [ 34.509412] __split_vma+0x170/0x950 [ 34.509914] split_vma+0xc6/0x110 [ 34.510386] mprotect_fixup+0x8d2/0xb30 [ 34.510922] do_mprotect_pkey+0x87e/0xd40 [ 34.511489] __x64_sys_mprotect+0x78/0xc0 [ 34.512047] do_syscall_64+0x3f/0x90 [ 34.512551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.513236] [ 34.513467] Freed by task 211: [ 34.513886] kasan_save_stack+0x22/0x50 [ 34.514423] kasan_set_track+0x25/0x30 [ 34.514947] kasan_save_free_info+0x2b/0x50 [ 34.515518] __kasan_slab_free+0x10a/0x190 [ 34.516085] kmem_cache_free+0x10d/0x4d0 [ 34.516632] rcu_core+0x8c8/0x2860 [ 34.517106] __do_softirq+0x1b7/0x7d4 [ 34.517617] [ 34.517845] Last potentially related work creation: [ 34.518470] kasan_save_stack+0x22/0x50 [ 34.519010] __kasan_record_aux_stack+0x8e/0xa0 [ 34.519654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.520345] remove_vma+0x139/0x170 [ 34.520833] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.521430] do_vmi_munmap+0x1f1/0x2b0 [ 34.521944] __vm_munmap+0x138/0x3a0 [ 34.522449] __x64_sys_munmap+0x59/0x80 [ 34.522993] do_syscall_64+0x3f/0x90 [ 34.523504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.524194] [ 34.524423] The buggy address belongs to the object at ffff88800bbd7910 [ 34.524423] which belongs to the cache vm_area_struct of size 168 [ 34.526030] The buggy address is located 88 bytes inside of [ 34.526030] freed 168-byte region [ffff88800bbd7910, ffff88800bbd79b8) [ 34.527587] [ 34.527826] The buggy address belongs to the physical page: [ 34.528558] page:000000009ad48343 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbbd7 [ 34.529755] memcg:ffff888014498b01 [ 34.530229] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.530946] page_type: 0xffffffff() [ 34.531458] raw: 0100000000000200 ffff88800879fc80 ffffea0000266f80 dead000000000002 [ 34.532481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014498b01 [ 34.533491] page dumped because: kasan: bad access detected [ 34.534223] [ 34.534461] Memory state around the buggy address: [ 34.535104] ffff88800bbd7800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.536056] ffff88800bbd7880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.537006] >ffff88800bbd7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.537954] ^ [ 34.538813] ffff88800bbd7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.539780] ffff88800bbd7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.540730] ================================================================== [ 34.541990] Disabling lock debugging due to kernel taint [ 36.800945] BUG: Bad rss-counter state mm:00000000a5de85d1 type:MM_FILEPAGES val:33 [ 36.801933] BUG: Bad rss-counter state mm:00000000a5de85d1 type:MM_ANONPAGES val:22 [ 37.366516] BUG: Bad rss-counter state mm:00000000d5d3f0db type:MM_FILEPAGES val:33 [ 37.367458] BUG: Bad rss-counter state mm:00000000d5d3f0db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12712' (ECDSA) to the list of known hosts. 2023/06/19 23:20:05 fuzzer started 2023/06/19 23:20:05 dialing manager at localhost:44161 2023/06/19 23:20:05 checking machine... 2023/06/19 23:20:05 checking revisions... [ 38.085987] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:20:05 testing simple program... [ 38.128665] cgroup: Unknown subsys name 'net' [ 38.168784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:19:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f9d1f5aa700 RCX=ffffffff8107f98e RDX=1ffff11002bc7cf5 RSI=0000000000000008 RDI=ffff888015e3e7a8 RBP=ffff888008d70000 RSP=ffff888008d7fd18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888015e3d1c0 R13=0000000000000000 R14=ffff888015e3e780 R15=ffff888015e3e840 RIP=ffffffff84506e56 RFL=00000046 [---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 00007f9d1f5aa700 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=00007f324cf67250 CR3=0000000019c96000 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=30323a3332203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343234 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9e134e RSI=ffffffff8180ee7e RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a48 R8 =ffffffff8613751e R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88801661d1c0 R15=ffff88806cf09a70 RIP=ffffffff811305f0 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 00007f3cca635900 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=00007fffb9584000 CR3=000000000da52000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000