general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 7872 Comm: syz-executor.1 Not tainted 6.7.0-rc6-next-20231222-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:63 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:83 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:72 [inline] RIP: 0010:scatterwalk_copychunks+0x3e0/0x560 crypto/scatterwalk.c:50 Code: f0 48 c1 e8 03 80 3c 08 00 0f 85 81 01 00 00 49 8d 44 24 08 4d 89 26 48 bf 00 00 00 00 00 fc ff df 48 89 44 24 10 48 c1 e8 03 <0f> b6 04 38 84 c0 74 08 3c 03 0f 8e 47 01 00 00 48 8b 44 24 08 41 RSP: 0018:ffffc9000afe6790 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffff888026e09dc0 RSI: ffffffff8465df74 RDI: dffffc0000000000 RBP: 0000000000001000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 7e2d90857e202b85 R12: 0000000000000000 R13: 0000000000000014 R14: ffffc9000afe6828 R15: 0000000000001000 FS: 00007f74933ff6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c03326fc40 CR3: 0000000077f18000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: scatterwalk_map_and_copy+0x151/0x1d0 crypto/scatterwalk.c:67 scomp_acomp_comp_decomp+0x3a3/0x780 crypto/scompress.c:149 crypto_acomp_compress include/crypto/acompress.h:302 [inline] zswap_store+0x98b/0x2430 mm/zswap.c:1666 swap_writepage+0x8e/0x220 mm/page_io.c:198 shmem_writepage+0x76b/0x1050 mm/shmem.c:1518 pageout+0x399/0x9e0 mm/vmscan.c:656 shrink_folio_list+0x2f47/0x3ea0 mm/vmscan.c:1319 evict_folios+0x6e6/0x1b90 mm/vmscan.c:4503 try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4708 lru_gen_shrink_lruvec mm/vmscan.c:4853 [inline] shrink_lruvec+0x314/0x29a0 mm/vmscan.c:5626 shrink_node_memcgs mm/vmscan.c:5846 [inline] shrink_node+0x81b/0x3740 mm/vmscan.c:5881 shrink_zones mm/vmscan.c:6120 [inline] do_try_to_free_pages+0x36a/0x1930 mm/vmscan.c:6182 try_to_free_mem_cgroup_pages+0x31f/0x780 mm/vmscan.c:6497 try_charge_memcg+0x3d1/0x1190 mm/memcontrol.c:2763 obj_cgroup_charge_pages mm/memcontrol.c:3276 [inline] __memcg_kmem_charge_page+0xdb/0x2a0 mm/memcontrol.c:3302 __alloc_pages+0x263/0x2410 mm/page_alloc.c:4621 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133 __get_free_pages+0xc/0x40 mm/page_alloc.c:4651 io_mem_alloc+0x33/0x60 io_uring/io_uring.c:2771 io_allocate_scq_urings io_uring/io_uring.c:3749 [inline] io_uring_create io_uring/io_uring.c:3907 [inline] io_uring_setup+0x13e9/0x2300 io_uring/io_uring.c:4019 __do_sys_io_uring_setup io_uring/io_uring.c:4046 [inline] __se_sys_io_uring_setup io_uring/io_uring.c:4040 [inline] __x64_sys_io_uring_setup+0x98/0x140 io_uring/io_uring.c:4040 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x62/0x6a RIP: 0033:0x7f749407cce9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f74933ff058 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 00007f749419c120 RCX: 00007f749407cce9 RDX: 00000000200001c0 RSI: 0000000020000100 RDI: 0000000000004def RBP: 00007f74940c947a R08: 0000000000000000 R09: 00000000200001c0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000100 R13: 0000000020000180 R14: 0000000000004def R15: 00000000200001c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:63 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:83 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:72 [inline] RIP: 0010:scatterwalk_copychunks+0x3e0/0x560 crypto/scatterwalk.c:50 Code: f0 48 c1 e8 03 80 3c 08 00 0f 85 81 01 00 00 49 8d 44 24 08 4d 89 26 48 bf 00 00 00 00 00 fc ff df 48 89 44 24 10 48 c1 e8 03 <0f> b6 04 38 84 c0 74 08 3c 03 0f 8e 47 01 00 00 48 8b 44 24 08 41 RSP: 0018:ffffc9000afe6790 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffff888026e09dc0 RSI: ffffffff8465df74 RDI: dffffc0000000000 RBP: 0000000000001000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 7e2d90857e202b85 R12: 0000000000000000 R13: 0000000000000014 R14: ffffc9000afe6828 R15: 0000000000001000 FS: 00007f74933ff6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c03326fc40 CR3: 0000000077f18000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: f0 48 c1 e8 03 lock shr $0x3,%rax 5: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 9: 0f 85 81 01 00 00 jne 0x190 f: 49 8d 44 24 08 lea 0x8(%r12),%rax 14: 4d 89 26 mov %r12,(%r14) 17: 48 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%rdi 1e: fc ff df 21: 48 89 44 24 10 mov %rax,0x10(%rsp) 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 38 movzbl (%rax,%rdi,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e 47 01 00 00 jle 0x181 3a: 48 8b 44 24 08 mov 0x8(%rsp),%rax 3f: 41 rex.B