[ 42.639871] BUG: Bad rss-counter state mm:000000005ad97b3e type:MM_FILEPAGES val:33 [ 42.640866] BUG: Bad rss-counter state mm:000000005ad97b3e type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 42.817119] ================================================================== [ 42.818037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.819003] Read of size 8 at addr ffff88800cb055c8 by task sshd/220 [ 42.819783] [ 42.820108] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.820982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.821965] Call Trace: [ 42.822323] [ 42.822610] dump_stack_lvl+0x91/0xf0 [ 42.823106] print_report+0xcc/0x620 [ 42.823597] ? __virt_addr_valid+0x102/0x340 [ 42.824158] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.824778] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.825403] kasan_report+0xbe/0xf0 [ 42.825883] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.826517] vma_interval_tree_remove+0xc75/0xec0 [ 42.827124] vma_prepare+0xc54/0x11a0 [ 42.827613] __split_vma+0x5af/0x950 [ 42.828090] ? __pfx___split_vma+0x10/0x10 [ 42.828622] ? find_held_lock+0x2c/0x110 [ 42.829146] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.829717] ? lock_is_held_type+0x9f/0x120 [ 42.830274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.830886] ? mtree_range_walk+0x632/0x900 [ 42.831442] ? mas_walk+0x5c7/0x7c0 [ 42.831918] do_vmi_munmap+0x1f1/0x2b0 [ 42.832424] mmap_region+0x1f9/0x2660 [ 42.832913] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.833432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.834163] ? __pfx_lock_acquire+0x10/0x10 [ 42.834708] ? __pfx_mmap_region+0x10/0x10 [ 42.835238] ? security_mmap_addr+0x7d/0xa0 [ 42.835771] ? get_unmapped_area+0x1f5/0x3f0 [ 42.836322] do_mmap+0x854/0xf00 [ 42.836763] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.837262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.837836] ksys_mmap_pgoff+0x3af/0x500 [ 42.838353] do_syscall_64+0x3f/0x90 [ 42.838836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.839502] RIP: 0033:0x7f49ae024d82 [ 42.839961] 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 [ 42.842128] RSP: 002b:00007ffdb4467b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.843053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49ae024d82 [ 42.843918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49ad45e000 [ 42.844772] RBP: 00007f49ad45e000 R08: 0000000000000009 R09: 0000000000001000 [ 42.845622] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558e7594b20 [ 42.846478] R13: 00007ffdb4467b70 R14: 00007ffdb4467ba0 R15: 00007ffdb4467f00 [ 42.847338] [ 42.847629] [ 42.847847] Allocated by task 213: [ 42.848284] kasan_save_stack+0x22/0x50 [ 42.848786] kasan_set_track+0x25/0x30 [ 42.849283] __kasan_slab_alloc+0x59/0x70 [ 42.849813] kmem_cache_alloc+0x16b/0x370 [ 42.850358] vm_area_dup+0x20/0x160 [ 42.850816] __split_vma+0x170/0x950 [ 42.851290] split_vma+0xc6/0x110 [ 42.851739] mprotect_fixup+0x8d2/0xb30 [ 42.852246] do_mprotect_pkey+0x87e/0xd40 [ 42.852763] __x64_sys_mprotect+0x78/0xc0 [ 42.853278] do_syscall_64+0x3f/0x90 [ 42.853752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.854421] [ 42.854635] Freed by task 213: [ 42.855025] kasan_save_stack+0x22/0x50 [ 42.855536] kasan_set_track+0x25/0x30 [ 42.856030] kasan_save_free_info+0x2b/0x50 [ 42.856557] __kasan_slab_free+0x10a/0x190 [ 42.857088] kmem_cache_free+0x10d/0x4d0 [ 42.857671] rcu_core+0x8c8/0x2860 [ 42.858224] __do_softirq+0x1b7/0x7d4 [ 42.858802] [ 42.859063] Last potentially related work creation: [ 42.859765] kasan_save_stack+0x22/0x50 [ 42.860375] __kasan_record_aux_stack+0x8e/0xa0 [ 42.861066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.861823] remove_vma+0x139/0x170 [ 42.862373] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.863037] do_vmi_munmap+0x1f1/0x2b0 [ 42.863622] __vm_munmap+0x138/0x3a0 [ 42.864178] __x64_sys_munmap+0x59/0x80 [ 42.864766] do_syscall_64+0x3f/0x90 [ 42.865328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.866105] [ 42.866366] The buggy address belongs to the object at ffff88800cb05570 [ 42.866366] which belongs to the cache vm_area_struct of size 168 [ 42.868118] The buggy address is located 88 bytes inside of [ 42.868118] freed 168-byte region [ffff88800cb05570, ffff88800cb05618) [ 42.869790] [ 42.870058] The buggy address belongs to the physical page: [ 42.870869] page:0000000058b7a1ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb05 [ 42.872166] memcg:ffff888014423f01 [ 42.872670] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.873427] page_type: 0xffffffff() [ 42.873954] raw: 0100000000000200 ffff88800879fc80 ffffea000026ee00 dead000000000004 [ 42.875044] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014423f01 [ 42.876109] page dumped because: kasan: bad access detected [ 42.876892] [ 42.877143] Memory state around the buggy address: [ 42.877848] ffff88800cb05480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.878896] ffff88800cb05500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 42.879905] >ffff88800cb05580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.880907] ^ [ 42.881691] ffff88800cb05600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 42.882706] ffff88800cb05680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.883725] ================================================================== [ 42.885015] Disabling lock debugging due to kernel taint [ 45.283302] BUG: Bad rss-counter state mm:0000000046b4147e type:MM_FILEPAGES val:33 [ 45.284545] BUG: Bad rss-counter state mm:0000000046b4147e type:MM_ANONPAGES val:22 [ 45.740071] BUG: Bad rss-counter state mm:00000000f81951f2 type:MM_FILEPAGES val:33 [ 45.740982] BUG: Bad rss-counter state mm:00000000f81951f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32123' (ECDSA) to the list of known hosts. 2023/06/20 06:01:47 fuzzer started 2023/06/20 06:01:47 dialing manager at localhost:44161 2023/06/20 06:01:47 checking machine... 2023/06/20 06:01:47 checking revisions... [ 46.469577] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:01:47 testing simple program... [ 46.520460] cgroup: Unknown subsys name 'net' [ 46.572570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b40 RCX=ffffffff86137501 RDX=1ffff1100d9c1369 RSI=ffffffff8180cd09 RDI=ffff88806ce09b48 RBP=0000000000000010 RSP=ffff88806ce09a58 R8 =ffffffff86137542 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800fcd3680 R15=ffff88801463f300 RIP=ffffffff813ad47f 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 00007fa29684f900 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=00007f88907c5650 CR3=000000001018a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=02b8eaad37aa7f6f00000000000ae988 XMM05=a42a25822635993d0000000000135870 XMM06=4fda316b135da52b0000000000134660 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007fff982dac08 CR3=000000000c580000 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=2036343a31303a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31303a3630203032 XMM08=6d632022656369767265732e40797474 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000