[ 31.572465] BUG: Bad rss-counter state mm:00000000efb69b6c type:MM_FILEPAGES val:33 [ 31.573618] BUG: Bad rss-counter state mm:00000000efb69b6c type:MM_ANONPAGES val:22 [ 31.608117] ================================================================== [ 31.609052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.610092] Read of size 8 at addr ffff88801a35e880 by task sshd/219 [ 31.610906] [ 31.611137] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.612049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.612986] Call Trace: [ 31.613293] <TASK> [ 31.613562] dump_stack_lvl+0x91/0xf0 [ 31.614062] print_report+0xcc/0x620 [ 31.614524] ? __virt_addr_valid+0x102/0x340 [ 31.615083] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.615672] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616276] kasan_report+0xbe/0xf0 [ 31.616736] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.617343] vma_interval_tree_remove+0xc75/0xec0 [ 31.617933] vma_prepare+0xc54/0x11a0 [ 31.618392] __split_vma+0x5af/0x950 [ 31.618843] ? __pfx___split_vma+0x10/0x10 [ 31.619381] ? find_held_lock+0x2c/0x110 [ 31.619903] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.620451] ? lock_is_held_type+0x9f/0x120 [ 31.620984] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.621568] ? mtree_range_walk+0x632/0x900 [ 31.622122] ? mas_walk+0x5c7/0x7c0 [ 31.622583] do_vmi_munmap+0x1f1/0x2b0 [ 31.623077] mmap_region+0x1f9/0x2660 [ 31.623537] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.624047] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.624725] ? __pfx_lock_acquire+0x10/0x10 [ 31.625249] ? __pfx_mmap_region+0x10/0x10 [ 31.625753] ? security_mmap_addr+0x7d/0xa0 [ 31.626273] ? get_unmapped_area+0x1f5/0x3f0 [ 31.626793] do_mmap+0x854/0xf00 [ 31.627243] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.627716] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.628262] ksys_mmap_pgoff+0x3af/0x500 [ 31.628747] do_syscall_64+0x3f/0x90 [ 31.629233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.629847] RIP: 0033:0x7f1f740d5d82 [ 31.630293] 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 [ 31.632341] RSP: 002b:00007ffff2674cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.633214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f740d5d82 [ 31.634040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f7350f000 [ 31.634841] RBP: 00007f1f7350f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.635659] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b21be4f70 [ 31.636462] R13: 00007ffff2674d10 R14: 00007ffff2674d40 R15: 00007ffff26750a0 [ 31.637436] </TASK> [ 31.637715] [ 31.637922] Allocated by task 208: [ 31.638327] kasan_save_stack+0x22/0x50 [ 31.638808] kasan_set_track+0x25/0x30 [ 31.639299] __kasan_slab_alloc+0x59/0x70 [ 31.639796] kmem_cache_alloc+0x16b/0x370 [ 31.640283] vm_area_dup+0x20/0x160 [ 31.640714] __split_vma+0x170/0x950 [ 31.641158] split_vma+0xc6/0x110 [ 31.641574] mprotect_fixup+0x8d2/0xb30 [ 31.642051] do_mprotect_pkey+0x87e/0xd40 [ 31.642549] __x64_sys_mprotect+0x78/0xc0 [ 31.643048] do_syscall_64+0x3f/0x90 [ 31.643500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.644108] [ 31.644312] Freed by task 208: [ 31.644684] kasan_save_stack+0x22/0x50 [ 31.645163] kasan_set_track+0x25/0x30 [ 31.645631] kasan_save_free_info+0x2b/0x50 [ 31.646138] __kasan_slab_free+0x10a/0x190 [ 31.646643] kmem_cache_free+0x10d/0x4d0 [ 31.647140] rcu_core+0x8c8/0x2860 [ 31.647565] __do_softirq+0x1b7/0x7d4 [ 31.648019] [ 31.648226] Last potentially related work creation: [ 31.648779] kasan_save_stack+0x22/0x50 [ 31.649256] __kasan_record_aux_stack+0x8e/0xa0 [ 31.649798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.650405] remove_vma+0x139/0x170 [ 31.650838] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.651374] do_vmi_munmap+0x1f1/0x2b0 [ 31.651829] __vm_munmap+0x138/0x3a0 [ 31.652273] __x64_sys_munmap+0x59/0x80 [ 31.652741] do_syscall_64+0x3f/0x90 [ 31.653186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.653796] [ 31.653999] The buggy address belongs to the object at ffff88801a35e828 [ 31.653999] which belongs to the cache vm_area_struct of size 168 [ 31.655394] The buggy address is located 88 bytes inside of [ 31.655394] freed 168-byte region [ffff88801a35e828, ffff88801a35e8d0) [ 31.656717] [ 31.656918] The buggy address belongs to the physical page: [ 31.657538] page:0000000080ae2ff8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a35e [ 31.658564] memcg:ffff88801a2e2d01 [ 31.658982] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.659587] page_type: 0xffffffff() [ 31.660013] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.660867] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2e2d01 [ 31.661714] page dumped because: kasan: bad access detected [ 31.662486] [ 31.662692] Memory state around the buggy address: [ 31.663270] ffff88801a35e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.664095] ffff88801a35e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.664932] >ffff88801a35e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.665755] ^ [ 31.666152] ffff88801a35e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.667004] ffff88801a35e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.667820] ================================================================== [ 31.668771] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.993794] BUG: Bad rss-counter state mm:0000000066929c72 type:MM_FILEPAGES val:33 [ 33.995128] BUG: Bad rss-counter state mm:0000000066929c72 type:MM_ANONPAGES val:22 [ 34.547946] BUG: Bad rss-counter state mm:000000001540d9b9 type:MM_FILEPAGES val:33 [ 34.549289] BUG: Bad rss-counter state mm:000000001540d9b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51924' (ECDSA) to the list of known hosts. 2023/06/20 16:46:00 fuzzer started 2023/06/20 16:46:00 dialing manager at localhost:36067 2023/06/20 16:46:00 checking machine... 2023/06/20 16:46:00 checking revisions... [ 35.217980] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:46:00 testing simple program... [ 35.266238] cgroup: Unknown subsys name 'net' [ 35.305090] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:46:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=dffffc0000000000 RSI=ffffffff846000aa RDI=ffff888019ebf370 RBP=ffff888019ebf3c8 RSP=ffff888019ebf300 R8 =0000000000000001 R9 =ffff888019ebf3b0 R10=0000000000038001 R11=00000000000b5080 R12=ffff888019ebf3d0 R13=ffff888019ebf3b8 R14=ffff888019ebf3b1 R15=ffff888019ebf370 RIP=ffffffff8113071f RFL=00000286 [--S--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 00007f0dbcd2b900 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=00007f0dbd2e2618 CR3=000000000fd42000 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=00000000000000000000000000000000 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=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff84537da6 RDX=000000000003537d RSI=000000000003537d RDI=ffffffff865be7e4 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 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=00007f4bc48be000 CR3=0000000018da6000 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=35343a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303733 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000