------------[ cut here ]------------ kernel BUG at include/linux/scatterlist.h:187! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 4783 Comm: syz-executor.0 Not tainted 6.9.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at sg_set_buf include/linux/scatterlist.h:187 [inline] PC is at sg_init_one+0x9c/0xa8 lib/scatterlist.c:143 LR is at sg_init_table+0x2c/0x40 lib/scatterlist.c:128 pc : [<807e8648>] lr : [<807e6a3c>] psr: 80000113 sp : e01a9a70 ip : e01a9aa8 fp : e01a9a8c r10: 00000000 r9 : ffefd004 r8 : ff7e7f1c r7 : 00000120 r6 : e01a9a90 r5 : 83f6a848 r4 : ffefd004 r3 : df000000 r2 : ffffffd8 r1 : 00000000 r0 : e01a9a90 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 84f2c6c0 DAC: fffffffd Register r0 information: 2-page vmalloc region starting at 0xe01a8000 allocated at kernel_clone+0xac/0x3cc kernel/fork.c:2796 Register r1 information: NULL pointer Register r2 information: non-paged memory Register r3 information: non-paged memory Register r4 information: non-paged memory Register r5 information: slab vmap_area start 83f6a848 pointer offset 0 size 40 Register r6 information: 2-page vmalloc region starting at 0xe01a8000 allocated at kernel_clone+0xac/0x3cc kernel/fork.c:2796 Register r7 information: non-paged memory Register r8 information: 0-page vmalloc region starting at 0xff7d8000 allocated at pcpu_get_vm_areas+0x0/0x12c8 mm/vmalloc.c:3064 Register r9 information: non-paged memory Register r10 information: NULL pointer Register r11 information: 2-page vmalloc region starting at 0xe01a8000 allocated at kernel_clone+0xac/0x3cc kernel/fork.c:2796 Register r12 information: 2-page vmalloc region starting at 0xe01a8000 allocated at kernel_clone+0xac/0x3cc kernel/fork.c:2796 Process syz-executor.0 (pid: 4783, stack limit = 0xe01a8000) Stack: (0xe01a9a70 to 0xe01aa000) 9a60: ff7e7efc 83f6a848 dee27b50 84232540 9a80: e01a9aec e01a9a90 804c3dd4 807e85b8 00000002 00000000 00000000 00000000 9aa0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9ac0: 00000003 fdf73c52 83f6a848 00000003 dee27b50 843fd8c4 843fd8c0 843fd8c0 9ae0: e01a9b14 e01a9af0 804c6a18 804c3d24 dee27b50 00000001 e01a9b84 00000000 9b00: 841f2400 8439a500 e01a9b64 e01a9b18 804bbbf4 804c68c8 804bd118 802e2798 9b20: e01a9b54 00000000 00100cca 00000000 00000000 fdf73c52 e01a9b54 00000003 9b40: 00100cca 00000000 00000000 e01a9b83 00000007 00000000 e01a9bdc e01a9b68 9b60: 804bd614 804bbb58 e01a9b83 00000000 ddde4280 dee27b50 00000003 00000003 9b80: 011a9bf0 00000000 00000000 00000000 00000000 00000000 00000001 00000000 9ba0: e01a9ba0 e01a9ba0 818753b0 fdf73c52 00000406 00000001 00000000 00000003 9bc0: 851344e0 00100cca 00000000 e01a9cf0 e01a9c54 e01a9be0 804bd968 804bd45c 9be0: 00000000 fdf73c52 802db4ec e01a9cf0 00000000 00000000 e01a9c2c e01a9c08 9c00: 8042e9b0 8042e804 e01a9cf0 8260cac8 851344e0 20000000 8439a500 00000000 9c20: e01a9c54 fdf73c52 804bcde8 e01a9cf0 00000000 00000003 851344e0 8439a500 9c40: 00000000 00000000 e01a9cb4 e01a9c58 8047f368 804bd90c e01a9d64 e01a9c68 9c60: 80200bb4 8189b884 ffedc000 00000a15 00000000 00000000 00000215 841f2400 9c80: 8439a500 851344e0 20000000 00000215 841f2400 20000000 851344e0 20000000 9ca0: 8431ad00 00000000 e01a9d64 e01a9cb8 80480c4c 8047f174 8431ad40 ffffffff 9cc0: e01a9d28 20000080 81c66394 84f7920c 8431ad40 20000000 20ffffff 84f7920c 9ce0: 00000000 ffffffff e01a9cf0 e01a9de8 851344e0 00000cc0 00020000 20000000 9d00: 20000000 00000a15 8504c800 84f2c6c0 00000380 00000000 00000000 00000000 9d20: 00000000 defc1b44 00000000 00000000 e01a9d64 fdf73c52 80480308 e01a9de8 9d40: 20000080 00000215 00000a07 20000000 8431ad00 00000002 e01a9dac e01a9d68 9d60: 80215d94 80480880 ddbade0c 30de0ddb 61cbab47 b756940f 4e9fa46b 841f2400 9d80: 00000000 8261d0e0 00000a07 20000080 e01a9de8 80215c4c 841f2400 00000180 9da0: e01a9de4 e01a9db0 802161dc 80215c58 8027caf4 1023ea1b d1a478df 4ab820fb 9dc0: ddbade0c 818490c0 a0000013 ffffffff e01a9e1c c4996cef e01a9eb4 e01a9de8 9de0: 80200ae4 802161b0 20000080 e01a9f1c ffffffa0 f6c73a21 cdaaaa9b a2f79063 9e00: 80304abf 20000080 c4996cef 0a350398 00000180 e01a9eb4 6b820422 e01a9e34 9e20: 1269d6bf 818490c0 a0000013 ffffffff 8089c158 00000000 00000040 00000000 9e40: 00000000 20000080 00000040 00000000 e01a9f70 807eaae8 150fe54b 4343b12a 9e60: 45cb56b5 e01a9efc b0bae198 4c87a1fc a20b5582 ea57a84a e8be77f4 c82b5c5e 9e80: 10186a49 fdf73c52 3b1b3bdd 00000000 e01a9f70 e01a9efc e01a9ebc 841f2400 9ea0: 841f2400 00000180 e01a9f64 e01a9eb8 8099dd84 807eaa5c 00000000 61707865 9ec0: 3320646e 79622d32 6b206574 8155bbc5 c469ace3 a0f760f3 61aef527 e6e30059 9ee0: d81f4838 b3fb6386 d8a092f7 00000002 00000000 00000000 00000000 f6c73a21 9f00: cdaaaa9b a2f79063 80304abf c4996cef 0a350398 6b820422 1269d6bf 336aa255 9f20: 7a2a9dba 9e530bd0 c15f0aeb c82b5c5f 10186a49 14158469 3b1b3bdd fdf73c52 9f40: 8024c880 00000088 00000000 0014c2c8 00000180 80200288 e01a9fa4 e01a9f68 9f60: 8099ea6c 8099dce4 0006b3f0 ecac8b10 00000000 00000000 20000080 00000088 9f80: 00000001 00000000 0006b3f4 fdf73c52 ffffffff 00000000 00000000 e01a9fa8 9fa0: 80200060 8099e9f8 00000000 00000000 20000080 00000088 00000000 00000000 9fc0: 00000000 00000000 0014c2c8 00000180 7e86d32e 7e86d32f 003d0f00 76bbc0fc 9fe0: 76bbbf08 76bbbef8 000167f8 00050bc0 60000010 20000080 00000000 00000000 Call trace: [<807e85ac>] (sg_init_one) from [<804c3dd4>] (zswap_decompress+0xbc/0x208 mm/zswap.c:1089) r7:84232540 r6:dee27b50 r5:83f6a848 r4:ff7e7efc [<804c3d18>] (zswap_decompress) from [<804c6a18>] (zswap_load+0x15c/0x198 mm/zswap.c:1637) r9:843fd8c0 r8:843fd8c0 r7:843fd8c4 r6:dee27b50 r5:00000003 r4:83f6a848 [<804c68bc>] (zswap_load) from [<804bbbf4>] (swap_read_folio+0xa8/0x498 mm/page_io.c:518) r9:8439a500 r8:841f2400 r7:00000000 r6:e01a9b84 r5:00000001 r4:dee27b50 [<804bbb4c>] (swap_read_folio) from [<804bd614>] (swap_cluster_readahead+0x1c4/0x34c mm/swap_state.c:684) r10:00000000 r9:00000007 r8:e01a9b83 r7:00000000 r6:00000000 r5:00100cca r4:00000003 [<804bd450>] (swap_cluster_readahead) from [<804bd968>] (swapin_readahead+0x68/0x4a8 mm/swap_state.c:904) r10:e01a9cf0 r9:00000000 r8:00100cca r7:851344e0 r6:00000003 r5:00000000 r4:00000001 [<804bd900>] (swapin_readahead) from [<8047f368>] (do_swap_page+0x200/0xcc4 mm/memory.c:4046) r10:00000000 r9:00000000 r8:8439a500 r7:851344e0 r6:00000003 r5:00000000 r4:e01a9cf0 [<8047f168>] (do_swap_page) from [<80480c4c>] (handle_pte_fault mm/memory.c:5301 [inline]) [<8047f168>] (do_swap_page) from [<80480c4c>] (__handle_mm_fault mm/memory.c:5439 [inline]) [<8047f168>] (do_swap_page) from [<80480c4c>] (handle_mm_fault+0x3d8/0x12b8 mm/memory.c:5604) r10:00000000 r9:8431ad00 r8:20000000 r7:851344e0 r6:20000000 r5:841f2400 r4:00000215 [<80480874>] (handle_mm_fault) from [<80215d94>] (do_page_fault+0x148/0x3a8 arch/arm/mm/fault.c:333) r10:00000002 r9:8431ad00 r8:20000000 r7:00000a07 r6:00000215 r5:20000080 r4:e01a9de8 [<80215c4c>] (do_page_fault) from [<802161dc>] (do_DataAbort+0x38/0xa8 arch/arm/mm/fault.c:565) r10:00000180 r9:841f2400 r8:80215c4c r7:e01a9de8 r6:20000080 r5:00000a07 r4:8261d0e0 [<802161a4>] (do_DataAbort) from [<80200ae4>] (__dabt_svc+0x44/0x60 arch/arm/kernel/entry-armv.S:212) Exception stack(0xe01a9de8 to 0xe01a9e30) 9de0: 20000080 e01a9f1c ffffffa0 f6c73a21 cdaaaa9b a2f79063 9e00: 80304abf 20000080 c4996cef 0a350398 00000180 e01a9eb4 6b820422 e01a9e34 9e20: 1269d6bf 818490c0 a0000013 ffffffff r8:c4996cef r7:e01a9e1c r6:ffffffff r5:a0000013 r4:818490c0 [<807eaa50>] (_copy_to_iter) from [<8099dd84>] (copy_to_iter include/linux/uio.h:196 [inline]) [<807eaa50>] (_copy_to_iter) from [<8099dd84>] (get_random_bytes_user+0xac/0x158 drivers/char/random.c:451) r10:00000180 r9:841f2400 r8:841f2400 r7:e01a9ebc r6:e01a9efc r5:e01a9f70 r4:00000000 [<8099dcd8>] (get_random_bytes_user) from [<8099ea6c>] (__do_sys_getrandom drivers/char/random.c:1390 [inline]) [<8099dcd8>] (get_random_bytes_user) from [<8099ea6c>] (sys_getrandom+0x80/0xf8 drivers/char/random.c:1364) r8:80200288 r7:00000180 r6:0014c2c8 r5:00000000 r4:00000088 [<8099e9ec>] (sys_getrandom) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xe01a9fa8 to 0xe01a9ff0) 9fa0: 00000000 00000000 20000080 00000088 00000000 00000000 9fc0: 00000000 00000000 0014c2c8 00000180 7e86d32e 7e86d32f 003d0f00 76bbc0fc 9fe0: 76bbbf08 76bbbef8 000167f8 00050bc0 r4:00000000 Code: 1a000004 e1822003 e8860094 e89da8f0 (e7f001f2) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 1a000004 bne 0x18 4: e1822003 orr r2, r2, r3 8: e8860094 stm r6, {r2, r4, r7} c: e89da8f0 ldm sp, {r4, r5, r6, r7, fp, sp, pc} * 10: e7f001f2 udf #18 <-- trapping instruction