[ 24.095815] BUG: Bad rss-counter state mm:00000000281a5d95 type:MM_FILEPAGES val:33 [ 24.097056] BUG: Bad rss-counter state mm:00000000281a5d95 type:MM_ANONPAGES val:22 [ 24.211805] ================================================================== [ 24.212736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.213674] Read of size 8 at addr ffff88800ec98d08 by task sshd/219 [ 24.214554] [ 24.214770] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.215657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.216651] Call Trace: [ 24.216975] [ 24.217257] dump_stack_lvl+0x91/0xf0 [ 24.217766] print_report+0xcc/0x620 [ 24.218251] ? __virt_addr_valid+0x102/0x340 [ 24.218810] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.219426] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.220042] kasan_report+0xbe/0xf0 [ 24.220511] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.221122] vma_interval_tree_remove+0xc75/0xec0 [ 24.221735] vma_prepare+0xc54/0x11a0 [ 24.222216] __split_vma+0x5af/0x950 [ 24.222684] ? __pfx___split_vma+0x10/0x10 [ 24.223229] ? find_held_lock+0x2c/0x110 [ 24.223747] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.224303] ? lock_is_held_type+0x9f/0x120 [ 24.224850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.225446] ? mtree_range_walk+0x632/0x900 [ 24.225996] ? mas_walk+0x5c7/0x7c0 [ 24.226473] do_vmi_munmap+0x1f1/0x2b0 [ 24.226980] mmap_region+0x1f9/0x2660 [ 24.227453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.228032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.228755] ? __pfx_lock_acquire+0x10/0x10 [ 24.229285] ? __pfx_mmap_region+0x10/0x10 [ 24.229805] ? security_mmap_addr+0x7d/0xa0 [ 24.230347] ? get_unmapped_area+0x1f5/0x3f0 [ 24.230903] do_mmap+0x854/0xf00 [ 24.231341] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.231831] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.232389] ksys_mmap_pgoff+0x3af/0x500 [ 24.232892] do_syscall_64+0x3f/0x90 [ 24.233364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.234011] RIP: 0033:0x7fd936116d82 [ 24.234472] 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 [ 24.236602] RSP: 002b:00007ffcbc85d248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.237514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd936116d82 [ 24.238355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd935550000 [ 24.239219] RBP: 00007fd935550000 R08: 0000000000000009 R09: 0000000000001000 [ 24.240049] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ac397bec0 [ 24.240880] R13: 00007ffcbc85d260 R14: 00007ffcbc85d290 R15: 00007ffcbc85d5f0 [ 24.241728] [ 24.242024] [ 24.242239] Allocated by task 212: [ 24.242661] kasan_save_stack+0x22/0x50 [ 24.243172] kasan_set_track+0x25/0x30 [ 24.243662] __kasan_slab_alloc+0x59/0x70 [ 24.244177] kmem_cache_alloc+0x16b/0x370 [ 24.244702] vm_area_dup+0x20/0x160 [ 24.245163] __split_vma+0x170/0x950 [ 24.245636] split_vma+0xc6/0x110 [ 24.246065] mprotect_fixup+0x8d2/0xb30 [ 24.246565] do_mprotect_pkey+0x87e/0xd40 [ 24.247094] __x64_sys_mprotect+0x78/0xc0 [ 24.247605] do_syscall_64+0x3f/0x90 [ 24.248079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.248715] [ 24.248929] Freed by task 212: [ 24.249313] kasan_save_stack+0x22/0x50 [ 24.249805] kasan_set_track+0x25/0x30 [ 24.250291] kasan_save_free_info+0x2b/0x50 [ 24.250814] __kasan_slab_free+0x10a/0x190 [ 24.251346] kmem_cache_free+0x10d/0x4d0 [ 24.251848] rcu_core+0x8c8/0x2860 [ 24.252284] __do_softirq+0x1b7/0x7d4 [ 24.252750] [ 24.252968] Last potentially related work creation: [ 24.253546] kasan_save_stack+0x22/0x50 [ 24.254050] __kasan_record_aux_stack+0x8e/0xa0 [ 24.254613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.255265] remove_vma+0x139/0x170 [ 24.255709] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.256271] do_vmi_munmap+0x1f1/0x2b0 [ 24.256747] __vm_munmap+0x138/0x3a0 [ 24.257218] __x64_sys_munmap+0x59/0x80 [ 24.257705] do_syscall_64+0x3f/0x90 [ 24.258174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.258814] [ 24.259047] Second to last potentially related work creation: [ 24.259722] kasan_save_stack+0x22/0x50 [ 24.260228] __kasan_record_aux_stack+0x8e/0xa0 [ 24.260790] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.261432] remove_vma+0x139/0x170 [ 24.261875] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.262428] do_vmi_munmap+0x1f1/0x2b0 [ 24.262919] mmap_region+0x1f9/0x2660 [ 24.263394] do_mmap+0x854/0xf00 [ 24.263823] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.264310] ksys_mmap_pgoff+0x3af/0x500 [ 24.264804] do_syscall_64+0x3f/0x90 [ 24.265282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.265928] [ 24.266139] The buggy address belongs to the object at ffff88800ec98cb0 [ 24.266139] which belongs to the cache vm_area_struct of size 168 [ 24.267595] The buggy address is located 88 bytes inside of [ 24.267595] freed 168-byte region [ffff88800ec98cb0, ffff88800ec98d58) [ 24.268985] [ 24.269199] The buggy address belongs to the physical page: [ 24.269847] page:00000000585fbc03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec98 [ 24.270919] memcg:ffff88800cd8b801 [ 24.271336] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.272033] page_type: 0xffffffff() [ 24.272478] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 24.273389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd8b801 [ 24.274288] page dumped because: kasan: bad access detected [ 24.274950] [ 24.275161] Memory state around the buggy address: [ 24.275738] ffff88800ec98c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.276585] ffff88800ec98c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.277439] >ffff88800ec98d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.278287] ^ [ 24.278721] ffff88800ec98d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.279578] ffff88800ec98e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.280421] ================================================================== [ 24.281488] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.873233] BUG: Bad rss-counter state mm:0000000008aebf90 type:MM_FILEPAGES val:33 [ 26.874432] BUG: Bad rss-counter state mm:0000000008aebf90 type:MM_ANONPAGES val:22 [ 27.419437] BUG: Bad rss-counter state mm:000000002ff4d55a type:MM_FILEPAGES val:33 [ 27.420547] BUG: Bad rss-counter state mm:000000002ff4d55a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3729' (ECDSA) to the list of known hosts. 2023/06/20 15:39:01 fuzzer started 2023/06/20 15:39:01 dialing manager at localhost:36067 2023/06/20 15:39:01 checking machine... 2023/06/20 15:39:01 checking revisions... [ 28.194237] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:39:01 testing simple program... [ 28.247238] cgroup: Unknown subsys name 'net' [ 28.293313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:39:01 Registers: info registers vcpu 0 RAX=0000000000000986 RBX=00007fe6fb696440 RCX=0000000000001003 RDX=0000000000000866 RSI=00888794a001b811 RDI=00000000420346b0 RBP=0000000000000005 RSP=00007ffd86724d60 R8 =00007ffd86724ea0 R9 =00007fe6fb6c7440 R10=00007fe6fb00d850 R11=000000000000001f R12=000000000000001f R13=00007fe6fab29100 R14=0000000000000001 R15=0000000000000000 RIP=00007fe6fb6a52e4 RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe6fab24900 00000000 00000000 GS =0000 0000000000000000 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=00007fe6fb0da6c0 CR3=000000001c734000 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=000000ff00000000000000000000ff00 XMM01=000000010000000000000000000000ff XMM02=4c4700362e322e325f4342494c470035 XMM03=00000000000000000000000000470035 XMM04=4342494c4700362e322e325f4342494c XMM05=00007fe6fb0ddf6000007fe6fb297950 XMM06=00007fe6fb29744000007fe6fb296f20 XMM07=00007fe6fabe112000007fe6fabe0b10 XMM08=00007fe6fabe05f000007fe6fabe0060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8450cc7f RCX=ffffffff863b3501 RDX=1ffff110032dbf30 RSI=0000000000000000 RDI=ffffffff8450cc7f RBP=ffffffff8450cc7f RSP=ffff8880196df8d8 R8 =ffffffff863b3588 R9 =ffff8880196df968 R10=0000000000038001 R11=000000000008a96a R12=0000000000000001 R13=0000000000000000 R14=ffff88800e0e8000 R15=ffff88801928f000 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f7aff8d6900 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=00007fffd1ca5000 CR3=0000000017504000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000