[ 34.899732] BUG: Bad rss-counter state mm:0000000009008c66 type:MM_FILEPAGES val:33 [ 34.900746] BUG: Bad rss-counter state mm:0000000009008c66 type:MM_ANONPAGES val:22 [ 35.062277] ================================================================== [ 35.063199] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.064151] Read of size 8 at addr ffff8880146eb3f8 by task sshd/220 [ 35.064911] [ 35.065134] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.066117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.067093] Call Trace: [ 35.067417] [ 35.067839] dump_stack_lvl+0x91/0xf0 [ 35.068460] print_report+0xcc/0x620 [ 35.069061] ? __virt_addr_valid+0x102/0x340 [ 35.069756] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.070515] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.071271] kasan_report+0xbe/0xf0 [ 35.071856] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.072629] vma_interval_tree_remove+0xc75/0xec0 [ 35.073385] vma_prepare+0xc54/0x11a0 [ 35.073977] __split_vma+0x5af/0x950 [ 35.074582] ? __pfx___split_vma+0x10/0x10 [ 35.075270] ? find_held_lock+0x2c/0x110 [ 35.075930] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.076650] ? lock_is_held_type+0x9f/0x120 [ 35.077378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.078146] ? mtree_range_walk+0x632/0x900 [ 35.078731] ? mas_walk+0x5c7/0x7c0 [ 35.079230] do_vmi_munmap+0x1f1/0x2b0 [ 35.079751] mmap_region+0x1f9/0x2660 [ 35.080262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.080802] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.081558] ? __pfx_lock_acquire+0x10/0x10 [ 35.082122] ? __pfx_mmap_region+0x10/0x10 [ 35.082688] ? security_mmap_addr+0x7d/0xa0 [ 35.083249] ? get_unmapped_area+0x1f5/0x3f0 [ 35.083824] do_mmap+0x854/0xf00 [ 35.084291] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.084805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.085408] ksys_mmap_pgoff+0x3af/0x500 [ 35.085942] do_syscall_64+0x3f/0x90 [ 35.086451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.087127] RIP: 0033:0x7f39bad14d82 [ 35.087613] 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 [ 35.089915] RSP: 002b:00007fffaf9b2aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.090874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39bad14d82 [ 35.091769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39ba14e000 [ 35.092674] RBP: 00007f39ba14e000 R08: 0000000000000009 R09: 0000000000001000 [ 35.093582] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564086933ec0 [ 35.094480] R13: 00007fffaf9b2ac0 R14: 00007fffaf9b2af0 R15: 00007fffaf9b2e50 [ 35.095375] [ 35.095688] [ 35.095914] Allocated by task 213: [ 35.096364] kasan_save_stack+0x22/0x50 [ 35.096895] kasan_set_track+0x25/0x30 [ 35.097438] __kasan_slab_alloc+0x59/0x70 [ 35.097995] kmem_cache_alloc+0x16b/0x370 [ 35.098547] vm_area_dup+0x20/0x160 [ 35.099031] __split_vma+0x170/0x950 [ 35.099529] split_vma+0xc6/0x110 [ 35.099995] mprotect_fixup+0x8d2/0xb30 [ 35.100517] do_mprotect_pkey+0x87e/0xd40 [ 35.101066] __x64_sys_mprotect+0x78/0xc0 [ 35.101626] do_syscall_64+0x3f/0x90 [ 35.102127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.102810] [ 35.103031] Freed by task 213: [ 35.103442] kasan_save_stack+0x22/0x50 [ 35.103969] kasan_set_track+0x25/0x30 [ 35.104490] kasan_save_free_info+0x2b/0x50 [ 35.105057] __kasan_slab_free+0x10a/0x190 [ 35.105638] kmem_cache_free+0x10d/0x4d0 [ 35.106176] rcu_core+0x8c8/0x2860 [ 35.106648] __do_softirq+0x1b7/0x7d4 [ 35.107150] [ 35.107378] Last potentially related work creation: [ 35.108004] kasan_save_stack+0x22/0x50 [ 35.108542] __kasan_record_aux_stack+0x8e/0xa0 [ 35.109159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.109855] remove_vma+0x139/0x170 [ 35.110333] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.110918] do_vmi_munmap+0x1f1/0x2b0 [ 35.111433] __vm_munmap+0x138/0x3a0 [ 35.111926] __x64_sys_munmap+0x59/0x80 [ 35.112444] do_syscall_64+0x3f/0x90 [ 35.112938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.113621] [ 35.113848] The buggy address belongs to the object at ffff8880146eb3a0 [ 35.113848] which belongs to the cache vm_area_struct of size 168 [ 35.115414] The buggy address is located 88 bytes inside of [ 35.115414] freed 168-byte region [ffff8880146eb3a0, ffff8880146eb448) [ 35.116909] [ 35.117135] The buggy address belongs to the physical page: [ 35.117862] page:00000000ff5ca37d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146eb [ 35.119021] memcg:ffff8880146e4101 [ 35.119476] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.120216] page_type: 0xffffffff() [ 35.120692] raw: 0100000000000200 ffff88800879fc80 ffffea000037d300 dead000000000003 [ 35.121683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146e4101 [ 35.122643] page dumped because: kasan: bad access detected [ 35.123352] [ 35.123578] Memory state around the buggy address: [ 35.124200] ffff8880146eb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.125106] ffff8880146eb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.126029] >ffff8880146eb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.126938] ^ [ 35.127844] ffff8880146eb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.128753] ffff8880146eb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.129672] ================================================================== [ 35.130721] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.511681] BUG: Bad rss-counter state mm:000000006f4ba939 type:MM_FILEPAGES val:33 [ 37.512892] BUG: Bad rss-counter state mm:000000006f4ba939 type:MM_ANONPAGES val:22 [ 37.979937] BUG: Bad rss-counter state mm:0000000012a0a051 type:MM_FILEPAGES val:33 [ 37.981464] BUG: Bad rss-counter state mm:0000000012a0a051 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45781' (ECDSA) to the list of known hosts. 2023/06/20 04:53:28 fuzzer started 2023/06/20 04:53:28 dialing manager at localhost:44161 2023/06/20 04:53:28 checking machine... 2023/06/20 04:53:28 checking revisions... [ 38.711112] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:53:29 testing simple program... [ 38.771307] cgroup: Unknown subsys name 'net' [ 38.847753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:53:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1329 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 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=00007f10b6cef6d0 CR3=000000000ca06000 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=00000000000000000000000000000000 XMM01=2443a4b0fb457a88284c17651ef080e0 XMM02=000000000011c918ec2efd57dc4c00df XMM03=0000000000123360b1e27516a3f99b26 XMM04=c8e47010ecb9f08300000000000ae988 XMM05=19e9129bd510f2350000000000132ee8 XMM06=4fda316b135da52b0000000000132d70 XMM07=e042d86d42eb936e00000000001235e0 XMM08=b1e27516a3f99b26000000000011c978 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800e1d7e60 RSI=ffff88800e1d7e28 RDI=ffff88800e1d78e8 RBP=ffff88800e1d7970 RSP=ffff88800e1d78d8 R8 =0000000000000001 R9 =ffff88800e1d7918 R10=0000000000038001 R11=0000000000022999 R12=ffff88800e1d79a0 R13=0000000000000000 R14=ffff888018ff8000 R15=ffff888010337030 RIP=ffffffff810bd05d RFL=00000296 [--S-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 00007f9e9a91e900 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=00007ffdd4be2000 CR3=00000000167b8000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000