[ 25.775094] BUG: Bad rss-counter state mm:00000000c382efec type:MM_FILEPAGES val:33 [ 25.776505] BUG: Bad rss-counter state mm:00000000c382efec type:MM_ANONPAGES val:22 [ 25.938246] ================================================================== [ 25.939125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.940046] Read of size 8 at addr ffff88801b148228 by task sshd/220 [ 25.940760] [ 25.940967] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.941883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.942799] Call Trace: [ 25.943103] [ 25.943400] dump_stack_lvl+0x91/0xf0 [ 25.943910] print_report+0xcc/0x620 [ 25.944392] ? __virt_addr_valid+0x102/0x340 [ 25.944912] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.945487] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.946066] kasan_report+0xbe/0xf0 [ 25.946517] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.947101] vma_interval_tree_remove+0xc75/0xec0 [ 25.947680] vma_prepare+0xc54/0x11a0 [ 25.948134] __split_vma+0x5af/0x950 [ 25.948581] ? __pfx___split_vma+0x10/0x10 [ 25.949075] ? find_held_lock+0x2c/0x110 [ 25.949568] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.950104] ? lock_is_held_type+0x9f/0x120 [ 25.950615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.951188] ? mtree_range_walk+0x632/0x900 [ 25.951737] ? mas_walk+0x5c7/0x7c0 [ 25.952186] do_vmi_munmap+0x1f1/0x2b0 [ 25.952649] mmap_region+0x1f9/0x2660 [ 25.953103] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.953587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.954266] ? __pfx_lock_acquire+0x10/0x10 [ 25.954770] ? __pfx_mmap_region+0x10/0x10 [ 25.955275] ? security_mmap_addr+0x7d/0xa0 [ 25.955772] ? get_unmapped_area+0x1f5/0x3f0 [ 25.956292] do_mmap+0x854/0xf00 [ 25.956708] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.957177] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.957712] ksys_mmap_pgoff+0x3af/0x500 [ 25.958189] do_syscall_64+0x3f/0x90 [ 25.958639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.959258] RIP: 0033:0x7f6fa6f2bd82 [ 25.959693] 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 [ 25.961673] RSP: 002b:00007ffc0d37c4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.962519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6fa6f2bd82 [ 25.963329] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6fa6365000 [ 25.964120] RBP: 00007f6fa6365000 R08: 0000000000000009 R09: 0000000000001000 [ 25.964920] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a06bb72ec0 [ 25.965715] R13: 00007ffc0d37c4f0 R14: 00007ffc0d37c520 R15: 00007ffc0d37c880 [ 25.966524] [ 25.966819] [ 25.967022] Allocated by task 211: [ 25.967440] kasan_save_stack+0x22/0x50 [ 25.967923] kasan_set_track+0x25/0x30 [ 25.968388] __kasan_slab_alloc+0x59/0x70 [ 25.968888] kmem_cache_alloc+0x16b/0x370 [ 25.969373] vm_area_dup+0x20/0x160 [ 25.969803] __split_vma+0x170/0x950 [ 25.970244] split_vma+0xc6/0x110 [ 25.970659] mprotect_fixup+0x8d2/0xb30 [ 25.971137] do_mprotect_pkey+0x87e/0xd40 [ 25.971642] __x64_sys_mprotect+0x78/0xc0 [ 25.972136] do_syscall_64+0x3f/0x90 [ 25.972579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.973182] [ 25.973387] Freed by task 19: [ 25.973752] kasan_save_stack+0x22/0x50 [ 25.974230] kasan_set_track+0x25/0x30 [ 25.974696] kasan_save_free_info+0x2b/0x50 [ 25.975202] __kasan_slab_free+0x10a/0x190 [ 25.975712] kmem_cache_free+0x10d/0x4d0 [ 25.976196] rcu_core+0x8c8/0x2860 [ 25.976616] __do_softirq+0x1b7/0x7d4 [ 25.977068] [ 25.977272] Last potentially related work creation: [ 25.977815] kasan_save_stack+0x22/0x50 [ 25.978291] __kasan_record_aux_stack+0x8e/0xa0 [ 25.978831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.979445] remove_vma+0x139/0x170 [ 25.979874] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.980404] do_vmi_munmap+0x1f1/0x2b0 [ 25.980862] __vm_munmap+0x138/0x3a0 [ 25.981306] __x64_sys_munmap+0x59/0x80 [ 25.981782] do_syscall_64+0x3f/0x90 [ 25.982297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.982904] [ 25.983108] The buggy address belongs to the object at ffff88801b1481d0 [ 25.983108] which belongs to the cache vm_area_struct of size 168 [ 25.984487] The buggy address is located 88 bytes inside of [ 25.984487] freed 168-byte region [ffff88801b1481d0, ffff88801b148278) [ 25.985798] [ 25.986002] The buggy address belongs to the physical page: [ 25.986618] page:00000000eecda923 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b148 [ 25.987648] memcg:ffff88801b149001 [ 25.988053] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.988655] page_type: 0xffffffff() [ 25.989080] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.989938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b149001 [ 25.990786] page dumped because: kasan: bad access detected [ 25.991423] [ 25.991630] Memory state around the buggy address: [ 25.992183] ffff88801b148100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.992989] ffff88801b148180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 25.993793] >ffff88801b148200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 25.994589] ^ [ 25.995114] ffff88801b148280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.995933] ffff88801b148300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.996727] ================================================================== [ 25.997690] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.008053] BUG: Bad rss-counter state mm:000000001c712e4b type:MM_FILEPAGES val:33 [ 28.009966] BUG: Bad rss-counter state mm:000000001c712e4b type:MM_ANONPAGES val:22 [ 28.569193] BUG: Bad rss-counter state mm:00000000cc76e154 type:MM_FILEPAGES val:33 [ 28.570400] BUG: Bad rss-counter state mm:00000000cc76e154 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32130' (ECDSA) to the list of known hosts. 2023/06/19 18:26:53 fuzzer started 2023/06/19 18:26:53 dialing manager at localhost:44161 2023/06/19 18:26:53 checking machine... 2023/06/19 18:26:53 checking revisions... [ 29.311545] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:26:53 testing simple program... [ 29.363371] cgroup: Unknown subsys name 'net' [ 29.405305] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000040 RCX=ffffffff818a520b RDX=ffff88801a149b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800ea87b00 RSP=ffff88800ea87a60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800ea87c48 R13=0000000000000400 R14=ffffffff85414700 R15=0000000000000000 RIP=ffffffff814c07e0 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 00007fdb5f540900 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=00007fffd0dda000 CR3=00000000158c6000 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=ffffffff86096756 RBX=ffffffff85d91630 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffffffff85d91634 RSP=ffff88806cf09958 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d91630 R13=ffffffff85d91630 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb7 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 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=00007f65e19ffd20 CR3=000000000c52a000 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=92f8b6973e76aa9d3c46f727380e51a2 XMM02=2c67c8bc2e329bc3000000000011c3d8 XMM03=fb795ef6d657705600000000001231f8 XMM04=8ffb2f52a18eab6a00000000000ae988 XMM05=ffbfa329d7c149e20000000000133f18 XMM06=4fda316b135da52b0000000000132978 XMM07=e042d86d42eb936e0000000000123478 XMM08=fc266f63a52d02b1000000000011c438 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000