[ 27.250918] BUG: Bad rss-counter state mm:0000000067c7f436 type:MM_FILEPAGES val:33 [ 27.251909] BUG: Bad rss-counter state mm:0000000067c7f436 type:MM_ANONPAGES val:22 [ 27.423622] ================================================================== [ 27.424737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.425951] Read of size 8 at addr ffff88800e1cb798 by task sshd/218 [ 27.426865] [ 27.427145] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.428245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.429372] Call Trace: [ 27.429732] [ 27.430052] dump_stack_lvl+0x91/0xf0 [ 27.430611] print_report+0xcc/0x620 [ 27.431167] ? __virt_addr_valid+0x102/0x340 [ 27.431801] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.432522] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.433267] kasan_report+0xbe/0xf0 [ 27.433846] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.434613] vma_interval_tree_remove+0xc75/0xec0 [ 27.435345] vma_prepare+0xc54/0x11a0 [ 27.435923] __split_vma+0x5af/0x950 [ 27.436536] ? __pfx___split_vma+0x10/0x10 [ 27.437070] ? find_held_lock+0x2c/0x110 [ 27.437572] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.438115] ? lock_is_held_type+0x9f/0x120 [ 27.438631] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.439212] ? mtree_range_walk+0x632/0x900 [ 27.439745] ? mas_walk+0x5c7/0x7c0 [ 27.440201] do_vmi_munmap+0x1f1/0x2b0 [ 27.440685] mmap_region+0x1f9/0x2660 [ 27.441150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.441655] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.442347] ? __pfx_lock_acquire+0x10/0x10 [ 27.442858] ? __pfx_mmap_region+0x10/0x10 [ 27.443361] ? security_mmap_addr+0x7d/0xa0 [ 27.443867] ? get_unmapped_area+0x1f5/0x3f0 [ 27.444417] do_mmap+0x854/0xf00 [ 27.444843] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.445322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.445857] ksys_mmap_pgoff+0x3af/0x500 [ 27.446347] do_syscall_64+0x3f/0x90 [ 27.446801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.447428] RIP: 0033:0x7f7fc13d2d82 [ 27.447865] 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 [ 27.449915] RSP: 002b:00007ffc2c7bf148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.450776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7fc13d2d82 [ 27.451590] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7fc080c000 [ 27.452413] RBP: 00007f7fc080c000 R08: 0000000000000009 R09: 0000000000001000 [ 27.453232] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561363200ec0 [ 27.454038] R13: 00007ffc2c7bf160 R14: 00007ffc2c7bf190 R15: 00007ffc2c7bf4f0 [ 27.454863] [ 27.455144] [ 27.455350] Allocated by task 211: [ 27.455768] kasan_save_stack+0x22/0x50 [ 27.456251] kasan_set_track+0x25/0x30 [ 27.456748] __kasan_slab_alloc+0x59/0x70 [ 27.457257] kmem_cache_alloc+0x16b/0x370 [ 27.457756] vm_area_dup+0x20/0x160 [ 27.458194] __split_vma+0x170/0x950 [ 27.458647] split_vma+0xc6/0x110 [ 27.459064] mprotect_fixup+0x8d2/0xb30 [ 27.459546] do_mprotect_pkey+0x87e/0xd40 [ 27.460044] __x64_sys_mprotect+0x78/0xc0 [ 27.460558] do_syscall_64+0x3f/0x90 [ 27.461017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.461633] [ 27.461840] Freed by task 211: [ 27.462217] kasan_save_stack+0x22/0x50 [ 27.462696] kasan_set_track+0x25/0x30 [ 27.463170] kasan_save_free_info+0x2b/0x50 [ 27.463686] __kasan_slab_free+0x10a/0x190 [ 27.464197] kmem_cache_free+0x10d/0x4d0 [ 27.464703] rcu_core+0x8c8/0x2860 [ 27.465141] __do_softirq+0x1b7/0x7d4 [ 27.465597] [ 27.465807] Last potentially related work creation: [ 27.466373] kasan_save_stack+0x22/0x50 [ 27.466861] __kasan_record_aux_stack+0x8e/0xa0 [ 27.467416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.468039] remove_vma+0x139/0x170 [ 27.468486] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.469024] do_vmi_munmap+0x1f1/0x2b0 [ 27.469491] __vm_munmap+0x138/0x3a0 [ 27.469937] __x64_sys_munmap+0x59/0x80 [ 27.470415] do_syscall_64+0x3f/0x90 [ 27.470870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.471487] [ 27.471698] The buggy address belongs to the object at ffff88800e1cb740 [ 27.471698] which belongs to the cache vm_area_struct of size 168 [ 27.473080] The buggy address is located 88 bytes inside of [ 27.473080] freed 168-byte region [ffff88800e1cb740, ffff88800e1cb7e8) [ 27.474380] [ 27.474583] The buggy address belongs to the physical page: [ 27.475196] page:00000000ed44c989 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1cb [ 27.476201] memcg:ffff88800e463701 [ 27.476616] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.477290] page_type: 0xffffffff() [ 27.477724] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 27.478601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e463701 [ 27.479468] page dumped because: kasan: bad access detected [ 27.480114] [ 27.480320] Memory state around the buggy address: [ 27.480890] ffff88800e1cb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.481718] ffff88800e1cb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 27.482547] >ffff88800e1cb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 27.483365] ^ [ 27.483843] ffff88800e1cb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 27.484695] ffff88800e1cb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 27.485525] ================================================================== [ 27.486641] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.859310] BUG: Bad rss-counter state mm:00000000f5ab1e11 type:MM_FILEPAGES val:33 [ 29.860487] BUG: Bad rss-counter state mm:00000000f5ab1e11 type:MM_ANONPAGES val:22 [ 30.318947] BUG: Bad rss-counter state mm:000000008f7dc8bb type:MM_FILEPAGES val:33 [ 30.320132] BUG: Bad rss-counter state mm:000000008f7dc8bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15477' (ECDSA) to the list of known hosts. 2023/06/20 03:09:41 fuzzer started 2023/06/20 03:09:42 dialing manager at localhost:44161 2023/06/20 03:09:42 checking machine... 2023/06/20 03:09:42 checking revisions... [ 30.993577] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:09:42 testing simple program... [ 31.039453] cgroup: Unknown subsys name 'net' [ 31.098184] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:09:38 Registers: info registers vcpu 0 RAX=1ffff11001d4b71d RBX=ffff88800ea5b8b8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ea5b8e8 RBP=ffff8880162028d0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888016202bc0 R14=ffffffff813782a8 R15=ffff88800daf6b00 RIP=ffffffff81846362 RFL=00000046 [---Z-P-] 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 00007f37caba0700 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=00007ffe38fd8000 CR3=00000000166e4000 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=2031343a39303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a39303a3330203032 XMM08=3d656e696c646d632022656369767265 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=00007efdb6e12e70 CR3=0000000013a7e000 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=9f29f653bfb2029ffb4b56dec6625760 XMM02=ec2efd57dc4c00df000000000011ca60 XMM03=111ca018383e3a81000000000011cb30 XMM04=0a15596fc491ffb100000000000ae988 XMM05=751b9502027dc0b90000000000133048 XMM06=850f5b0e86320c120000000000131ab8 XMM07=e042d86d42eb936e0000000000123828 XMM08=111ca018383e3a81000000000011cb30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000