syzkaller login: [ 61.244393] BUG: Bad rss-counter state mm:0000000075326182 type:MM_FILEPAGES val:33 [ 61.246291] BUG: Bad rss-counter state mm:0000000075326182 type:MM_ANONPAGES val:22 [ 61.419547] ================================================================== [ 61.420467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.421396] Read of size 8 at addr ffff8880168116b0 by task sshd/227 [ 61.422260] [ 61.422503] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.423372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.424349] Call Trace: [ 61.424668] [ 61.424957] dump_stack_lvl+0x91/0xf0 [ 61.425470] print_report+0xcc/0x620 [ 61.425994] ? __virt_addr_valid+0x102/0x340 [ 61.426564] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.427208] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.427845] kasan_report+0xbe/0xf0 [ 61.428341] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.428989] vma_interval_tree_remove+0xc75/0xec0 [ 61.429631] vma_prepare+0xc54/0x11a0 [ 61.430125] __split_vma+0x5af/0x950 [ 61.430620] ? __pfx___split_vma+0x10/0x10 [ 61.431172] ? find_held_lock+0x2c/0x110 [ 61.431710] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.432303] ? lock_is_held_type+0x9f/0x120 [ 61.432871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.433512] ? mtree_range_walk+0x632/0x900 [ 61.434099] ? mas_walk+0x5c7/0x7c0 [ 61.434598] do_vmi_munmap+0x1f1/0x2b0 [ 61.435105] mmap_region+0x1f9/0x2660 [ 61.435615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.436150] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.436892] ? __pfx_lock_acquire+0x10/0x10 [ 61.437455] ? __pfx_mmap_region+0x10/0x10 [ 61.438020] ? security_mmap_addr+0x7d/0xa0 [ 61.438586] ? get_unmapped_area+0x1f5/0x3f0 [ 61.439166] do_mmap+0x854/0xf00 [ 61.439634] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.440144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.440724] ksys_mmap_pgoff+0x3af/0x500 [ 61.441257] do_syscall_64+0x3f/0x90 [ 61.441769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.442437] RIP: 0033:0x7fbb4cb91d82 [ 61.442915] 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 [ 61.445145] RSP: 002b:00007ffe5f2d5458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.446112] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb4cb91d82 [ 61.446989] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb4bfcb000 [ 61.447864] RBP: 00007fbb4bfcb000 R08: 0000000000000009 R09: 0000000000001000 [ 61.448746] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad5ef4eec0 [ 61.449658] R13: 00007ffe5f2d5470 R14: 00007ffe5f2d54a0 R15: 00007ffe5f2d5800 [ 61.450550] [ 61.450851] [ 61.451070] Allocated by task 220: [ 61.451510] kasan_save_stack+0x22/0x50 [ 61.452040] kasan_set_track+0x25/0x30 [ 61.452554] __kasan_slab_alloc+0x59/0x70 [ 61.453099] kmem_cache_alloc+0x16b/0x370 [ 61.453645] vm_area_dup+0x20/0x160 [ 61.454114] __split_vma+0x170/0x950 [ 61.454603] split_vma+0xc6/0x110 [ 61.455076] mprotect_fixup+0x8d2/0xb30 [ 61.455599] do_mprotect_pkey+0x87e/0xd40 [ 61.456134] __x64_sys_mprotect+0x78/0xc0 [ 61.456681] do_syscall_64+0x3f/0x90 [ 61.457168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.457851] [ 61.458073] Freed by task 220: [ 61.458479] kasan_save_stack+0x22/0x50 [ 61.458997] kasan_set_track+0x25/0x30 [ 61.459514] kasan_save_free_info+0x2b/0x50 [ 61.460084] __kasan_slab_free+0x10a/0x190 [ 61.460631] kmem_cache_free+0x10d/0x4d0 [ 61.461157] rcu_core+0x8c8/0x2860 [ 61.461627] __do_softirq+0x1b7/0x7d4 [ 61.462118] [ 61.462340] Last potentially related work creation: [ 61.462951] kasan_save_stack+0x22/0x50 [ 61.463473] __kasan_record_aux_stack+0x8e/0xa0 [ 61.464065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.464727] remove_vma+0x139/0x170 [ 61.465212] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.465791] do_vmi_munmap+0x1f1/0x2b0 [ 61.466279] __vm_munmap+0x138/0x3a0 [ 61.466743] __x64_sys_munmap+0x59/0x80 [ 61.467240] do_syscall_64+0x3f/0x90 [ 61.467708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.468354] [ 61.468570] The buggy address belongs to the object at ffff888016811658 [ 61.468570] which belongs to the cache vm_area_struct of size 168 [ 61.470065] The buggy address is located 88 bytes inside of [ 61.470065] freed 168-byte region [ffff888016811658, ffff888016811700) [ 61.471494] [ 61.471709] The buggy address belongs to the physical page: [ 61.472377] page:0000000034d89d88 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16811 [ 61.473480] memcg:ffff888016886d01 [ 61.473917] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.474574] page_type: 0xffffffff() [ 61.475028] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.475951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016886d01 [ 61.476880] page dumped because: kasan: bad access detected [ 61.477572] [ 61.477797] Memory state around the buggy address: [ 61.478377] ffff888016811580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.479243] ffff888016811600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.480108] >ffff888016811680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.480984] ^ [ 61.481582] ffff888016811700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.482446] ffff888016811780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.483302] ================================================================== [ 61.484347] Disabling lock debugging due to kernel taint [ 63.797961] BUG: Bad rss-counter state mm:000000006e9cc1a5 type:MM_FILEPAGES val:33 [ 63.799126] BUG: Bad rss-counter state mm:000000006e9cc1a5 type:MM_ANONPAGES val:22 [ 64.276978] BUG: Bad rss-counter state mm:000000009fbb9280 type:MM_FILEPAGES val:33 [ 64.278219] BUG: Bad rss-counter state mm:000000009fbb9280 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43804' (ECDSA) to the list of known hosts. 2023/06/19 22:11:41 fuzzer started 2023/06/19 22:11:41 dialing manager at localhost:44161 2023/06/19 22:11:41 checking machine... 2023/06/19 22:11:41 checking revisions... [ 64.880985] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:11:41 testing simple program... [ 64.929421] cgroup: Unknown subsys name 'net' [ 64.973662] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f90a1bc6000 CR3=000000000c926000 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=044bb839b42db0b9ec42c8c329ab232f XMM02=000000000011d358eff9b2d0a8fce9cb XMM03=000000000011d4282c67c8bc2e329bc3 XMM04=45bab7727209fdc800000000000ae988 XMM05=16bbfc4fa606b6250000000000133630 XMM06=caa36273c187647a0000000000132808 XMM07=e042d86d42eb936e0000000000124040 XMM08=be58b70877177bd7000000000011d428 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff836347f0 RCX=0000000000000000 RDX=ffff88800f14b680 RSI=ffff888019b40680 RDI=ffff888019b405c0 RBP=ffff888019b40680 RSP=ffff888018d97dc0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800ed00698 R13=ffff88800ed00550 R14=ffff888019b40680 R15=ffff88800ed00680 RIP=ffffffff83634542 RFL=00000293 [--S-A-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 00007f38f2b08900 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=00007f38f30bf618 CR3=000000000dc64000 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=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