[ 28.221947] BUG: Bad rss-counter state mm:00000000b8b4465e type:MM_FILEPAGES val:33 [ 28.221982] BUG: Bad rss-counter state mm:00000000b8b4465e type:MM_ANONPAGES val:22 [ 28.575690] ================================================================== [ 28.576702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.577646] Read of size 8 at addr ffff88801a38adf0 by task sshd/219 [ 28.578584] [ 28.578807] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.579660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.580655] Call Trace: [ 28.580973] [ 28.581260] dump_stack_lvl+0x91/0xf0 [ 28.581751] print_report+0xcc/0x620 [ 28.582231] ? __virt_addr_valid+0x102/0x340 [ 28.582784] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.583397] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.584048] kasan_report+0xbe/0xf0 [ 28.584537] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.585184] vma_interval_tree_remove+0xc75/0xec0 [ 28.585808] vma_prepare+0xc54/0x11a0 [ 28.586308] __split_vma+0x5af/0x950 [ 28.586797] ? __pfx___split_vma+0x10/0x10 [ 28.587354] ? find_held_lock+0x2c/0x110 [ 28.587899] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.588484] ? lock_is_held_type+0x9f/0x120 [ 28.589043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.589680] ? mtree_range_walk+0x632/0x900 [ 28.590253] ? mas_walk+0x5c7/0x7c0 [ 28.590746] do_vmi_munmap+0x1f1/0x2b0 [ 28.591245] mmap_region+0x1f9/0x2660 [ 28.591750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.592309] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.593043] ? __pfx_lock_acquire+0x10/0x10 [ 28.593600] ? __pfx_mmap_region+0x10/0x10 [ 28.594144] ? security_mmap_addr+0x7d/0xa0 [ 28.594684] ? get_unmapped_area+0x1f5/0x3f0 [ 28.595249] do_mmap+0x854/0xf00 [ 28.595702] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.596228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.596811] ksys_mmap_pgoff+0x3af/0x500 [ 28.597335] do_syscall_64+0x3f/0x90 [ 28.597831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.598493] RIP: 0033:0x7fbbac2d2d82 [ 28.598963] 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 [ 28.601170] RSP: 002b:00007ffe56c47758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.602107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbac2d2d82 [ 28.602984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbab70c000 [ 28.603864] RBP: 00007fbbab70c000 R08: 0000000000000009 R09: 0000000000001000 [ 28.604762] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615b7463d90 [ 28.605632] R13: 00007ffe56c47770 R14: 00007ffe56c477a0 R15: 00007ffe56c47b00 [ 28.606515] [ 28.606813] [ 28.607033] Allocated by task 206: [ 28.607474] kasan_save_stack+0x22/0x50 [ 28.608004] kasan_set_track+0x25/0x30 [ 28.608515] __kasan_slab_alloc+0x59/0x70 [ 28.609058] kmem_cache_alloc+0x16b/0x370 [ 28.609595] vm_area_dup+0x20/0x160 [ 28.610071] __split_vma+0x170/0x950 [ 28.610561] split_vma+0xc6/0x110 [ 28.611015] mprotect_fixup+0x8d2/0xb30 [ 28.611535] do_mprotect_pkey+0x87e/0xd40 [ 28.612084] __x64_sys_mprotect+0x78/0xc0 [ 28.612617] do_syscall_64+0x3f/0x90 [ 28.613104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.613770] [ 28.613991] Freed by task 13: [ 28.614390] kasan_save_stack+0x22/0x50 [ 28.614914] kasan_set_track+0x25/0x30 [ 28.615424] kasan_save_free_info+0x2b/0x50 [ 28.616000] __kasan_slab_free+0x10a/0x190 [ 28.616546] kmem_cache_free+0x10d/0x4d0 [ 28.617082] rcu_core+0x8c8/0x2860 [ 28.617542] __do_softirq+0x1b7/0x7d4 [ 28.618034] [ 28.618253] Last potentially related work creation: [ 28.618860] kasan_save_stack+0x22/0x50 [ 28.619447] __kasan_record_aux_stack+0x8e/0xa0 [ 28.620053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.620720] remove_vma+0x139/0x170 [ 28.621183] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.621752] do_vmi_munmap+0x1f1/0x2b0 [ 28.622254] __vm_munmap+0x138/0x3a0 [ 28.622727] __x64_sys_munmap+0x59/0x80 [ 28.623241] do_syscall_64+0x3f/0x90 [ 28.623725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.624395] [ 28.624617] The buggy address belongs to the object at ffff88801a38ad98 [ 28.624617] which belongs to the cache vm_area_struct of size 168 [ 28.626125] The buggy address is located 88 bytes inside of [ 28.626125] freed 168-byte region [ffff88801a38ad98, ffff88801a38ae40) [ 28.627573] [ 28.627798] The buggy address belongs to the physical page: [ 28.628500] page:000000000f825a95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a38a [ 28.629630] memcg:ffff88801a36d501 [ 28.630070] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.630744] page_type: 0xffffffff() [ 28.631189] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.632131] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a36d501 [ 28.633045] page dumped because: kasan: bad access detected [ 28.633724] [ 28.633944] Memory state around the buggy address: [ 28.634556] ffff88801a38ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.635463] ffff88801a38ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.636367] >ffff88801a38ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.637250] ^ [ 28.638084] ffff88801a38ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.638961] ffff88801a38ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.639821] ================================================================== [ 28.640757] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.576904] BUG: Bad rss-counter state mm:00000000b17dd8ad type:MM_FILEPAGES val:33 [ 30.577947] BUG: Bad rss-counter state mm:00000000b17dd8ad type:MM_ANONPAGES val:22 [ 31.052363] BUG: Bad rss-counter state mm:00000000ff6c3508 type:MM_FILEPAGES val:33 [ 31.053960] BUG: Bad rss-counter state mm:00000000ff6c3508 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47120' (ECDSA) to the list of known hosts. 2023/06/20 04:11:36 fuzzer started 2023/06/20 04:11:37 dialing manager at localhost:44161 2023/06/20 04:11:37 checking machine... 2023/06/20 04:11:37 checking revisions... [ 31.750164] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:11:37 testing simple program... [ 31.806450] cgroup: Unknown subsys name 'net' [ 31.855889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:32 Registers: info registers vcpu 0 RAX=ffff888018a16668 RBX=0000000000000000 RCX=ffffffff8166eed0 RDX=0000000000000001 RSI=0000000000000008 RDI=ffff888018a16660 RBP=ffff888018a164a8 RSP=ffff88801665fc30 R8 =0000000000000001 R9 =ffffed1003142c61 R10=ffff888018a1630b R11=00000000000b6996 R12=ffff888018a16358 R13=ffff888018a162a8 R14=ffffffff84d2eba0 R15=ffff888018a16358 RIP=ffffffff8180eebb 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 00007f5f4c7d6900 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=00007f5f4cd8d618 CR3=000000001c31a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fa761a4a650 CR3=000000000e804000 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=2036333a31313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a31313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000