[ 31.267926] BUG: Bad rss-counter state mm:00000000a6e2a15f type:MM_FILEPAGES val:33 [ 31.269419] BUG: Bad rss-counter state mm:00000000a6e2a15f type:MM_ANONPAGES val:22 [ 31.432278] ================================================================== [ 31.433236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.434191] Read of size 8 at addr ffff88800e349798 by task sshd/219 [ 31.435139] [ 31.435367] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.436240] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.437274] Call Trace: [ 31.437610] [ 31.437900] dump_stack_lvl+0x91/0xf0 [ 31.438391] print_report+0xcc/0x620 [ 31.438894] ? __virt_addr_valid+0x102/0x340 [ 31.439444] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.440090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.440721] kasan_report+0xbe/0xf0 [ 31.441232] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.441876] vma_interval_tree_remove+0xc75/0xec0 [ 31.442487] vma_prepare+0xc54/0x11a0 [ 31.442977] __split_vma+0x5af/0x950 [ 31.443449] ? __pfx___split_vma+0x10/0x10 [ 31.443990] ? find_held_lock+0x2c/0x110 [ 31.444510] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.445098] ? lock_is_held_type+0x9f/0x120 [ 31.445654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.446260] ? mtree_range_walk+0x632/0x900 [ 31.446831] ? mas_walk+0x5c7/0x7c0 [ 31.447307] do_vmi_munmap+0x1f1/0x2b0 [ 31.447817] mmap_region+0x1f9/0x2660 [ 31.448299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.448841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.449569] ? __pfx_lock_acquire+0x10/0x10 [ 31.450108] ? __pfx_mmap_region+0x10/0x10 [ 31.450678] ? security_mmap_addr+0x7d/0xa0 [ 31.451216] ? get_unmapped_area+0x1f5/0x3f0 [ 31.451782] do_mmap+0x854/0xf00 [ 31.452235] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.452762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.453336] ksys_mmap_pgoff+0x3af/0x500 [ 31.453874] do_syscall_64+0x3f/0x90 [ 31.454353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.455031] RIP: 0033:0x7f11b1d0ad82 [ 31.455495] 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 [ 31.457734] RSP: 002b:00007ffe78584718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.458677] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11b1d0ad82 [ 31.459537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11b1144000 [ 31.460395] RBP: 00007f11b1144000 R08: 0000000000000009 R09: 0000000000001000 [ 31.461271] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2cd0d2ec0 [ 31.462139] R13: 00007ffe78584730 R14: 00007ffe78584760 R15: 00007ffe78584ac0 [ 31.463013] [ 31.463311] [ 31.463532] Allocated by task 210: [ 31.463983] kasan_save_stack+0x22/0x50 [ 31.464486] kasan_set_track+0x25/0x30 [ 31.465004] __kasan_slab_alloc+0x59/0x70 [ 31.465533] kmem_cache_alloc+0x16b/0x370 [ 31.466062] vm_area_dup+0x20/0x160 [ 31.466523] __split_vma+0x170/0x950 [ 31.467002] split_vma+0xc6/0x110 [ 31.467453] mprotect_fixup+0x8d2/0xb30 [ 31.467975] do_mprotect_pkey+0x87e/0xd40 [ 31.468497] __x64_sys_mprotect+0x78/0xc0 [ 31.469062] do_syscall_64+0x3f/0x90 [ 31.469551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.470195] [ 31.470410] Freed by task 210: [ 31.470817] kasan_save_stack+0x22/0x50 [ 31.471318] kasan_set_track+0x25/0x30 [ 31.471829] kasan_save_free_info+0x2b/0x50 [ 31.472359] __kasan_slab_free+0x10a/0x190 [ 31.472925] kmem_cache_free+0x10d/0x4d0 [ 31.473440] rcu_core+0x8c8/0x2860 [ 31.473896] __do_softirq+0x1b7/0x7d4 [ 31.474380] [ 31.474611] Last potentially related work creation: [ 31.475199] kasan_save_stack+0x22/0x50 [ 31.475721] __kasan_record_aux_stack+0x8e/0xa0 [ 31.476295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.476982] remove_vma+0x139/0x170 [ 31.477434] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.478001] do_vmi_munmap+0x1f1/0x2b0 [ 31.478485] __vm_munmap+0x138/0x3a0 [ 31.478968] __x64_sys_munmap+0x59/0x80 [ 31.479466] do_syscall_64+0x3f/0x90 [ 31.479961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.480622] [ 31.480847] Second to last potentially related work creation: [ 31.481535] kasan_save_stack+0x22/0x50 [ 31.482049] __kasan_record_aux_stack+0x8e/0xa0 [ 31.482638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.483278] remove_vma+0x139/0x170 [ 31.483749] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.484310] do_vmi_munmap+0x1f1/0x2b0 [ 31.484815] mmap_region+0x1f9/0x2660 [ 31.485312] do_mmap+0x854/0xf00 [ 31.485758] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.486252] ksys_mmap_pgoff+0x3af/0x500 [ 31.486764] do_syscall_64+0x3f/0x90 [ 31.487237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.487889] [ 31.488105] The buggy address belongs to the object at ffff88800e349740 [ 31.488105] which belongs to the cache vm_area_struct of size 168 [ 31.489616] The buggy address is located 88 bytes inside of [ 31.489616] freed 168-byte region [ffff88800e349740, ffff88800e3497e8) [ 31.491025] [ 31.491245] The buggy address belongs to the physical page: [ 31.491927] page:000000003c71b550 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe349 [ 31.493065] memcg:ffff88800e15de01 [ 31.493497] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.494156] page_type: 0xffffffff() [ 31.494632] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a900 dead000000000004 [ 31.495565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e15de01 [ 31.496483] page dumped because: kasan: bad access detected [ 31.497183] [ 31.497398] Memory state around the buggy address: [ 31.497996] ffff88800e349680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.498867] ffff88800e349700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.499730] >ffff88800e349780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.500595] ^ [ 31.501102] ffff88800e349800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.501972] ffff88800e349880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.502844] ================================================================== [ 31.503916] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.266578] BUG: Bad rss-counter state mm:00000000531c4554 type:MM_FILEPAGES val:33 [ 33.267619] BUG: Bad rss-counter state mm:00000000531c4554 type:MM_ANONPAGES val:22 [ 33.713568] BUG: Bad rss-counter state mm:00000000d947c4a3 type:MM_FILEPAGES val:33 [ 33.715113] BUG: Bad rss-counter state mm:00000000d947c4a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15568' (ECDSA) to the list of known hosts. 2023/06/20 20:59:37 fuzzer started 2023/06/20 20:59:37 dialing manager at localhost:36067 2023/06/20 20:59:37 checking machine... 2023/06/20 20:59:37 checking revisions... [ 34.413216] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:59:37 testing simple program... [ 34.460969] cgroup: Unknown subsys name 'net' [ 34.499302] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:59:37 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff815345ff RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84512042 RSP=ffff888019e3ff08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=7962206d65687420 R12=ffff888019e3ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b979 RFL=00000002 [-------] 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 00007fbaeec82900 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=00007fbaef237650 CR3=0000000016f82000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801583a8d0 RCX=ffffffff815343f6 RDX=1ffff1100d9e747a RSI=0000000000000008 RDI=ffff88806cf3a3d0 RBP=0000000000000200 RSP=ffff888019e3fd20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea000063ba00 R14=ffff88806cf3a2c0 R15=dffffc0000000000 RIP=ffffffff81370ac4 RFL=00000012 [----A--] 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 00007fbaeec82900 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=00007fbaef23a0b0 CR3=0000000016f82000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000